#!/bin/sh
# configure script for zlib.
#
# Normally configure builds both a static and a shared library.
# If you want to build just a static library, use: ./configure --static
#
# To impose specific compiler or flags or install directory, use for example:
#    prefix=$HOME CC=cc CFLAGS="-O4" ./configure
# or for csh/tcsh users:
#    (setenv prefix $HOME; setenv CC cc; setenv CFLAGS "-O4"; ./configure)

# Incorrect settings of CC or CFLAGS may prevent creating a shared library.
# If you have problems, try without defining CC and CFLAGS before reporting
# an error.

# start off configure.log
echo -------------------- >> configure.log
echo $0 $* >> configure.log
date >> configure.log

SRCDIR=$(cd $(dirname $0); pwd)
BUILDDIR=$(pwd)

# set command prefix for cross-compilation
if [ -n "${CHOST}" ]; then
    # normalize the chost before parsing it
    NORM_CHOST=$(sh "$SRCDIR"/tools/config.sub $CHOST)
    uname="$(echo "${NORM_CHOST}" | sed -e 's/^[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)$/\1/' -e 's/^[^-]*-[^-]*-\([^-]*\)-.*$/\1/')"
    CROSS_PREFIX="${CHOST}-"
    ARCH="$(echo "${NORM_CHOST}" | sed -e 's/-.*//')"
else
    ARCH="$(uname -m)"
fi

case "${ARCH}" in
    x86_64)
        case "${CFLAGS}" in
            *-m32*)
                ARCH=i686
            ;;
        esac
    ;;
    i386 | i486 | i586 | i686)
        case "${CFLAGS}" in
            *-m64*)
                ARCH=x86_64
            ;;
        esac
    ;;
esac

# destination name for windows import library
IMPORTLIB=

# establish commands for library building
if "${CROSS_PREFIX}ar" --version >/dev/null 2>/dev/null || test $? -lt 126; then
    AR=${AR-"${CROSS_PREFIX}ar"}
    test -n "${CROSS_PREFIX}" && echo Using ${AR} | tee -a configure.log
else
    AR=${AR-"ar"}
    test -n "${CROSS_PREFIX}" && echo Using ${AR} | tee -a configure.log
fi
ARFLAGS=${ARFLAGS-"rc"}
if "${CROSS_PREFIX}ranlib" --version >/dev/null 2>/dev/null || test $? -lt 126; then
    RANLIB=${RANLIB-"${CROSS_PREFIX}ranlib"}
    test -n "${CROSS_PREFIX}" && echo Using ${RANLIB} | tee -a configure.log
else
    RANLIB=${RANLIB-"ranlib"}
fi

# set defaults before processing command line options
LDCONFIG=${LDCONFIG-"ldconfig"}
DEFFILE=
RC=
RCFLAGS=
RCOBJS=
STRIP=
ARCHS=
PC_CFLAGS=
prefix=${prefix-/usr/local}
exec_prefix=${exec_prefix-'${prefix}'}
bindir=${bindir-'${exec_prefix}/bin'}
libdir=${libdir-'${exec_prefix}/lib'}
sharedlibdir=${sharedlibdir-'${libdir}'}
includedir=${includedir-'${prefix}/include'}
mandir=${mandir-'${prefix}/share/man'}
shared_ext='.so'
shared=1
gzfileops=1
compat=0
cover=0
build32=0
build64=0
buildvpclmulqdq=1
buildacle=1
buildarmv6=1
buildaltivec=1
buildpower8=1
buildpower9=1
buildneon=1
builddfltccdeflate=0
builddfltccinflate=0
buildcrc32vx=1
floatabi=
forcesse2=0
# For CPUs that can benefit from AVX512, it seems GCC generates suboptimal
# instruction scheduling unless you specify a reasonable -mtune= target
avx512flag="-mavx512f -mavx512dq -mavx512bw -mavx512vl -mbmi2"
avx512vnniflag="${avx512flag} -mavx512vnni"
avx2flag="-mavx2 -mbmi2"
sse2flag="-msse2"
ssse3flag="-mssse3"
sse42flag="-msse4.2"
pclmulflag="-mpclmul"
vpclmulflag="-mvpclmulqdq -mavx512f"
xsaveflag="-mxsave"
acleflag=
neonflag=
armv6flag=
noltoflag="-fno-lto"
vgfmaflag="-march=z13"
vmxflag="-maltivec"
symbol_prefix=""
without_optimizations=0
without_new_strategies=0
reducedmem=0
gcc=0
warn=0
debug=0
visibility=1
old_cc="$CC"
old_cflags="$CFLAGS"
OBJC='$(OBJZ)'
PIC_OBJC='$(PIC_OBJZ)'
INSTALLTARGETS="install-shared install-static"
UNINSTALLTARGETS="uninstall-shared uninstall-static"

TEST="teststatic"

# leave this script, optionally in a bad way
leave()
{
  if test "$*" != "0"; then
    echo "** $0 aborting." | tee -a configure.log
  fi
  rm -f $test.[co] $test $test$shared_ext $test.gcno ./--version
  echo -------------------- >> configure.log
  echo >> configure.log
  echo >> configure.log
  exit $1
}

# process command line options
while test $# -ge 1
do
case "$1" in
    -h* | --help)
      echo 'usage:' | tee -a configure.log
      echo '  configure [--prefix=PREFIX]  [--eprefix=EXPREFIX]' | tee -a configure.log
      echo '    [--static] [--32] [--64] [--libdir=LIBDIR] [--sharedlibdir=LIBDIR]' | tee -a configure.log
      echo '    [--includedir=INCLUDEDIR] [--mandir=MANDIR] [--archs="-arch i386 -arch x86_64"]' | tee -a configure.log
      echo '    [--sprefix=SYMBOL_PREFIX]   Adds a prefix to all exported symbols' | tee -a configure.log
      echo '    [--warn]                    Enables extra compiler warnings' | tee -a configure.log
      echo '    [--debug]                   Enables extra debug prints during operation' | tee -a configure.log
      echo '    [--zlib-compat]             Compiles for zlib-compatible API instead of zlib-ng API' | tee -a configure.log
      echo '    [--without-gzfileops]       Compiles without the gzfile parts of the API enabled' | tee -a configure.log
      echo '    [--without-optimizations]   Compiles without support for optional instruction sets' | tee -a configure.log
      echo '    [--without-new-strategies]  Compiles without using new additional deflate strategies' | tee -a configure.log
      echo '    [--without-acle]            Compiles without ARM C Language Extensions' | tee -a configure.log
      echo '    [--without-neon]            Compiles without ARM Neon SIMD instruction set' | tee -a configure.log
      echo '    [--without-armv6]           Compiles without ARMv6 SIMD instruction set' | tee -a configure.log
      echo '    [--without-altivec]         Compiles without PPC AltiVec support' | tee -a configure.log
      echo '    [--without-power8]          Compiles without Power8 instruction set' | tee -a configure.log
      echo '    [--with-dfltcc-deflate]     Use DEFLATE CONVERSION CALL instruction for compression on IBM Z' | tee -a configure.log
      echo '    [--with-dfltcc-inflate]     Use DEFLATE CONVERSION CALL instruction for decompression on IBM Z' | tee -a configure.log
      echo '    [--without-crc32-vx]        Build without vectorized CRC32 on IBM Z' | tee -a configure.log
      echo '    [--with-reduced-mem]        Reduced memory usage for special cases (reduces performance)' | tee -a configure.log
      echo '    [--force-sse2]              Assume SSE2 instructions are always available (disabled by default on x86, enabled on x86_64)' | tee -a configure.log
        exit 0 ;;
    -p*=* | --prefix=*) prefix=$(echo $1 | sed 's/.*=//'); shift ;;
    -e*=* | --eprefix=*) exec_prefix=$(echo $1 | sed 's/.*=//'); shift ;;
    -m*=* | --sprefix=*) symbol_prefix=$(echo $1 | sed 's/.*=//'); shift ;;
    -l*=* | --libdir=*) libdir=$(echo $1 | sed 's/.*=//'); shift ;;
    --sharedlibdir=*) sharedlibdir=$(echo $1 | sed 's/.*=//'); shift ;;
    -i*=* | --includedir=*) includedir=$(echo $1 | sed 's/.*=//');shift ;;
    --mandir=*) mandir=$(echo $1 | sed 's/.*=//');shift ;;
    -u*=* | --uname=*) uname=$(echo $1 | sed 's/.*=//');shift ;;
    -p* | --prefix) prefix="$2"; shift; shift ;;
    -e* | --eprefix) exec_prefix="$2"; shift; shift ;;
    -m* | --sprefix) symbol_prefix="$2"; shift; shift ;;
    -l* | --libdir) libdir="$2"; shift; shift ;;
    -i* | --includedir) includedir="$2"; shift; shift ;;
    -s* | --shared | --enable-shared) shared=1; shift ;;
    -t | --static) shared=0; shift ;;
    --zlib-compat) compat=1; shift ;;
    --without-gzfileops) gzfileops=0; shift ;;
    --cover) cover=1; shift ;;
    -3* | --32) build32=1; shift ;;
    -6* | --64) build64=1; shift ;;
    --without-vpclmulqdq) buildvpclmulqdq=0; shift ;;
    --without-acle) buildacle=0; shift ;;
    --without-neon) buildneon=0; shift ;;
    --without-armv6) buildarmv6=0; shift ;;
    --without-altivec) buildaltivec=0 ; shift ;;
    --without-power8) buildpower8=0 ; shift ;;
    --without-power9) buildpower9=0 ; shift ;;
    --with-dfltcc-deflate) builddfltccdeflate=1; shift ;;
    --with-dfltcc-inflate) builddfltccinflate=1; shift ;;
    --without-crc32-vx) buildcrc32vx=0; shift ;;
    --with-reduced-mem) reducedmem=1; shift ;;
    --force-sse2) forcesse2=1; shift ;;
    -a*=* | --archs=*) ARCHS=$(echo $1 | sed 's/.*=//'); shift ;;
    --sysconfdir=*) echo "ignored option: --sysconfdir" | tee -a configure.log; shift ;;
    --localstatedir=*) echo "ignored option: --localstatedir" | tee -a configure.log; shift ;;
    -noopt | --without-optimizations) without_optimizations=1; shift;;
    -oldstrat | --without-new-strategies) without_new_strategies=1; shift;;
    -w* | --warn) warn=1; shift ;;
    -d* | --debug) debug=1; shift ;;

    *)
      echo "unknown option: $1" | tee -a configure.log
      echo "$0 --help for help" | tee -a configure.log
      leave 1;;
    esac
done

# temporary file name
test=ztest$$

# put arguments in log, also put test file in log if used in arguments
show()
{
  case "$@" in
    *$test.c*)
      echo "=== $test.c ===" >> configure.log
      cat $test.c >> configure.log
      echo "===" >> configure.log;;
  esac
  echo "$@" >> configure.log
}

# check for gcc vs. cc and set compile and link flags based on the system identified by uname
cat > $test.c <<EOF
extern int getchar();
int main() {return getchar();}
EOF

cc=${CC-${CROSS_PREFIX}gcc}
printf "Checking for compiler... " | tee -a configure.log
case "$cc" in
  *gcc*) gcc=1 ;;
  *clang*) gcc=1 ;;
esac
case $($cc -v 2>&1) in
  *gcc*) gcc=1 ;;
  *clang*) gcc=1 ;;
esac

if test $build32 -eq 1; then
  CFLAGS="${CFLAGS} -m32"
  SFLAGS="${SFLAGS} -m32"
  LDFLAGS="${LDFLAGS} -m32"
fi
if test $build64 -eq 1; then
  CFLAGS="${CFLAGS} -m64"
  SFLAGS="${SFLAGS} -m64"
  LDFLAGS="${LDFLAGS} -m64"
fi

# Set library name depending on zlib-compat option
if test $compat -eq 0; then
  LIBNAME=libz-ng
  LIBNAME2=zlib-ng
  SUFFIX=-ng
else
  LIBNAME=libz
  LIBNAME2=zlib
  SUFFIX=""
fi

STATICLIB=${LIBNAME}.a
MAPNAME=${LIBNAME2}.map

# extract zlib version numbers from zlib.h
if test $compat -eq 0; then
  VER=$(sed -n -e '/ZLIBNG_VERSION "/s/.*"\(.*\)".*/\1/p' < ${SRCDIR}/zlib-ng.h.in)
  VER3=$(sed -n -e '/ZLIBNG_VERSION "/s/.*"\([0-9]*\.[0-9]*\.[0-9]*\).*/\1/p' < ${SRCDIR}/zlib-ng.h.in)
  VER2=$(sed -n -e '/ZLIBNG_VERSION "/s/.*"\([0-9]*\.[0-9]*\)\..*/\1/p' < ${SRCDIR}/zlib-ng.h.in)
  VER1=$(sed -n -e '/ZLIBNG_VERSION "/s/.*"\([0-9]*\)\..*/\1/p' < ${SRCDIR}/zlib-ng.h.in)
else
  VER=$(sed -n -e '/ZLIB_VERSION "/s/.*"\(.*\)".*/\1/p' < ${SRCDIR}/zlib.h.in)
  VER3=$(sed -n -e '/ZLIB_VERSION "/s/.*"\([0-9]*\.[0-9]*\.[0-9]*\).*/\1/p' < ${SRCDIR}/zlib.h.in)
  VER2=$(sed -n -e '/ZLIB_VERSION "/s/.*"\([0-9]*\.[0-9]*\)\..*/\1/p' < ${SRCDIR}/zlib.h.in)
  VER1=$(sed -n -e '/ZLIB_VERSION "/s/.*"\([0-9]*\)\..*/\1/p' < ${SRCDIR}/zlib.h.in)
fi

show $cc -c $test.c
if test "$gcc" -eq 1 && ($cc $CFLAGS -c $test.c) >> configure.log 2>&1; then
  echo "$cc" | tee -a configure.log
  CC="$cc"
  if test "${CFLAGS#*"-std="}" = "$CFLAGS" ; then
    CFLAGS="${CFLAGS} -std=c11"
  fi

  # Re-check ARCH if the compiler is a cross-compiler.
  if $CC -print-multiarch 1> /dev/null 2>&1 && test -n "$($CC -print-multiarch)" 1> /dev/null 2>&1; then
      CC_ARCH=$($CC $CFLAGS -print-multiarch | sed 's/-.*//g')
  else
      CC_ARCH=$($CC $CFLAGS -dumpmachine | sed 's/-.*//g')
  fi
  case $CC_ARCH in
    i386 | i486 | i586 | i686)
      # Honor user choice if gcc is multilib and 64-bit is requested
      if test $build64 -eq 1; then
        ARCH=x86_64
      else
        ARCH=$CC_ARCH
      fi ;;
    x86_64)
      # Honor user choice if gcc is multilib and 32-bit is requested
      if test $build32 -ne 1; then
        ARCH=$CC_ARCH
      fi ;;
    arm | armeb)
      ARCH=arm
      if test "${uname}" = "eabi"; then
        uname=arm
      fi ;;
    armv8l)
      ARCH=armv8-a ;;
    aarch64 | aarch64_be | arm64)
      if test "${uname}" = "elf"; then
        uname=aarch64
      fi
      ARCH=aarch64 ;;
    powerpc | ppc)
      ARCH=powerpc ;;
    powerpc64 | ppc64)
      ARCH=powerpc64 ;;
    powerpc64le | ppc64le)
      ARCH=powerpc64le ;;
  esac
  CFLAGS="-O2 ${CFLAGS}"
  if test -n "${ARCHS}"; then
    CFLAGS="${CFLAGS} ${ARCHS}"
    LDFLAGS="${LDFLAGS} ${ARCHS}"
  fi
  CFLAGS="${CFLAGS} -Wall"
  SFLAGS="${CFLAGS} -fPIC"
  if test "$warn" -eq 1; then
    CFLAGS="${CFLAGS} -Wextra"
  fi
  if test $debug -eq 1; then
    CFLAGS="${CFLAGS} -DZLIB_DEBUG"
    SFLAGS="${SFLAGS} -DZLIB_DEBUG"
  else
    CFLAGS="${CFLAGS} -DNDEBUG"
    SFLAGS="${SFLAGS} -DNDEBUG"
  fi
  if test -z "$uname"; then
    uname=$( (uname -s || echo unknown) 2>/dev/null)
  fi
  case "$uname" in
  Linux* | linux* | GNU | GNU/* | solaris* | Haiku)
        LDSHARED=${LDSHARED-"$cc"}
        LDSHAREDFLAGS="-shared -Wl,-soname,${LIBNAME}.so.${VER1}" ;;
  *BSD | *bsd* | DragonFly)
        LDSHARED=${LDSHARED-"$cc"}
        LDSHAREDFLAGS="-shared -Wl,-soname,${LIBNAME}.so.${VER1}"
        LDCONFIG="ldconfig -m" ;;
  CYGWIN* | Cygwin* | cygwin*)
        visibility=0
        ARFLAGS="rcs"
        SFLAGS="${CFLAGS}"
        shared_ext='.dll'
        sharedlibdir='${bindir}'
        if test $compat -eq 0; then
          SHAREDLIB=cygz-ng$shared_ext
        else
          SHAREDLIB=cygz$shared_ext
        fi
        SHAREDLIBM=''
        SHAREDLIBV=''
        SHAREDTARGET=$SHAREDLIB
        IMPORTLIB="${LIBNAME}.dll.a"
        LDSHARED=${LDSHARED-"$cc"}
        LDSHAREDFLAGS="-shared -Wl,--out-implib,${IMPORTLIB}"
        LDSHAREDLIBC=""
        if test $gzfileops -eq 0; then
          DEFFILE='win32/${LIBNAME2}.def'
        fi
        RC="${CROSS_PREFIX}windres"
        RCFLAGS="-I ${BUILDDIR}"
        RCOBJS='zlibrc.o'
        STRIP="${CROSS_PREFIX}strip"
        EXE='.exe' ;;
  MSYS* | msys*)
        visibility=0
        ARFLAGS="rcs"
        SFLAGS="${CFLAGS}"
        shared_ext='.dll'
        sharedlibdir='${bindir}'
        if test $compat -eq 0; then
          SHAREDLIB=msys-z-ng$shared_ext
        else
          SHAREDLIB=msys-z$shared_ext
        fi
        SHAREDLIBM=''
        SHAREDLIBV=''
        SHAREDTARGET=$SHAREDLIB
        IMPORTLIB="${LIBNAME}.dll.a"
        LDSHARED=${LDSHARED-"$cc"}
        LDSHAREDFLAGS="-shared -Wl,--out-implib,${IMPORTLIB}"
        LDSHAREDLIBC=""
        if test $gzfileops -eq 0; then
          DEFFILE='win32/${LIBNAME2}.def'
        fi
        RC="${CROSS_PREFIX}windres"
        RCFLAGS="-I ${BUILDDIR}"
        RCOBJS='zlibrc.o'
        STRIP="${CROSS_PREFIX}strip"
        EXE='.exe' ;;
  MINGW* | mingw*)
        visibility=0
        ARFLAGS="rcs"
        CFLAGS="${CFLAGS} -D_POSIX_C_SOURCE=200809L -D_GNU_SOURCE=1 -Wno-pedantic-ms-format"
        SFLAGS="${CFLAGS}"
        shared_ext='.dll'
        sharedlibdir='${bindir}'
        SHAREDLIB=${LIBNAME}-$VER1$shared_ext
        SHAREDLIBM=''
        SHAREDLIBV=''
        SHAREDTARGET=$SHAREDLIB
        IMPORTLIB="${LIBNAME}.dll.a"
        LDSHARED=${LDSHARED-"$cc"}
        LDSHAREDFLAGS="-shared -Wl,--out-implib=${IMPORTLIB}"
        LDSHAREDLIBC=""
        if test $gzfileops -eq 0; then
          DEFFILE='win32/${LIBNAME2}.def'
        fi
        RC="${CROSS_PREFIX}windres"
        RCFLAGS="-I ${BUILDDIR}"
        if [ "$CC" = "mingw32-gcc" ]; then
          case $ARCH in
          i386 | i486 | i586 | i686) RCFLAGS="${RCFLAGS} -F pe-i386";;
          esac;
        fi
        RCOBJS='zlibrc.o'
        STRIP="${CROSS_PREFIX}strip"
        EXE='.exe' ;;
  QNX*)  # This is for QNX6. I suppose that the QNX rule below is for QNX2,QNX4
         # (alain.bonnefoy@icbt.com)
                 LDSHARED=${LDSHARED-"$cc"}
                 LDSHAREDFLAGS="-shared -Wl,-h${LIBNAME}.so.${VER1}" ;;
  HP-UX*)
         LDSHARED=${LDSHARED-"$cc"}
         LDSHAREDFLAGS="-shared"
         case $( (uname -m || echo unknown) 2>/dev/null) in
         ia64)
                 shared_ext='.so'
                 SHAREDLIB='${LIBNAME}.so' ;;
         *)
                 shared_ext='.sl'
                 SHAREDLIB='${LIBNAME}.sl' ;;
         esac ;;
  Darwin* | darwin*)
             shared_ext='.dylib'
             SHAREDLIB=${LIBNAME}$shared_ext
             SHAREDLIBV=${LIBNAME}.$VER$shared_ext
             SHAREDLIBM=${LIBNAME}.$VER1$shared_ext
             SHAREDTARGET=$SHAREDLIBV
             LDSHARED=${LDSHARED-"$cc"}
             LDSHAREDFLAGS="-dynamiclib -install_name @rpath/${SHAREDLIBM} -compatibility_version ${VER1} -current_version ${VER3}"
             if "${CROSS_PREFIX}libtool" -V 2>&1 | grep Apple > /dev/null; then
                 AR="${CROSS_PREFIX}libtool"
             elif libtool -V 2>&1 | grep Apple > /dev/null; then
                 AR="libtool"
             else
                 AR="/usr/bin/libtool"
             fi
             ARFLAGS="-o" ;;
  aarch64)
             LDSHARED=${LDSHARED-"$cc"}
             LDSHAREDFLAGS="-shared -Wl,-soname,${LIBNAME}.so.${VER1}"
             LDSHAREDLIBC="-Wl,--start-group -lc -lrdimon -Wl,--end-group" ;;
  *)
             LDSHARED=${LDSHARED-"$cc"}
             LDSHAREDFLAGS="-shared" ;;
  esac
else
  # find system name and corresponding cc options
  CC=${CC-cc}
  gcc=0
  echo "$CC" | tee -a configure.log
  if test -z "$uname"; then
    uname=$( (uname -sr || echo unknown) 2>/dev/null)
  fi
  case "$uname" in
  HP-UX*)    SFLAGS=${CFLAGS-"-O +z"}
             CFLAGS=${CFLAGS-"-O"}
             LDSHARED=${LDSHARED-"ld"}
             LDSHAREDFLAGS="-b"
         case $( (uname -m || echo unknown) 2>/dev/null) in
         ia64)
             shared_ext='.so'
             SHAREDLIB='${LIBNAME}.so' ;;
         *)
             shared_ext='.sl'
             SHAREDLIB='${LIBNAME}.sl' ;;
         esac ;;
  AIX*)  # Courtesy of dbakker@arrayasolutions.com
             SFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
             CFLAGS=${CFLAGS-"-O -qmaxmem=8192"}
             LDSHARED=${LDSHARED-"xlc"}
             LDSHAREDFLAGS="-G" ;;
  # send working options for other systems to zlib@gzip.org
  *)         SFLAGS=${CFLAGS-"-O"}
             CFLAGS=${CFLAGS-"-O"}
             LDSHARED=${LDSHARED-"cc"}
             LDSHAREDFLAGS="-shared" ;;
  esac
fi

# Symbol versioning
case "$uname" in
  CYGWIN* | Cygwin* | cygwin* | MINGW* | mingw* | MSYS* | msys* | Darwin* | darwin*)
    echo "Checking for Symbol versioning... No."
  ;;
  *)
    if test $shared -eq 1; then
      echo "Checking for Symbol versioning... Yes."
      CFLAGS="${CFLAGS} -DHAVE_SYMVER"
      SFLAGS="${SFLAGS} -DHAVE_SYMVER"
    else
      echo "Checking for Symbol versioning... No."
    fi
  ;;
esac

# Simplify some later conditionals
case "$uname" in
Linux* | linux*)
  LINUX=1 ;;
*)
  LINUX=0 ;;
esac

# destination names for shared library if not defined above
SHAREDLIB=${SHAREDLIB-"${LIBNAME}$shared_ext"}
SHAREDLIBV=${SHAREDLIBV-"${LIBNAME}$shared_ext.$VER"}
SHAREDLIBM=${SHAREDLIBM-"${LIBNAME}$shared_ext.$VER1"}
SHAREDTARGET=${SHAREDTARGET-"${LIBNAME}$shared_ext.$VER"}

echo >> configure.log

# define functions for testing compiler and library characteristics and logging the results

cat > $test.c <<EOF
#error error
EOF
if ($CC -c $CFLAGS $test.c) 2>/dev/null; then
  try()
  {
    show "$@"
    test "$( ("$@") 2>&1 | tee -a configure.log)" = ""
  }
  echo - using any output from compiler to indicate an error >> configure.log
else
  try()
  {
    show "$@"
    ( "$@" ) >> configure.log 2>&1
    ret=$?
    if test $ret -ne 0; then
      echo "(exit code $ret)" >> configure.log
    fi
    return $ret
  }
fi

cat > $test.c << EOF
int foo() { return 0; }
EOF
echo "Checking for obsessive-compulsive compiler options..." >> configure.log
if try $CC -c $CFLAGS $test.c; then
  :
else
  echo "Compiler error reporting is too harsh for $0 (perhaps remove -Werror)." | tee -a configure.log
  leave 1
fi

echo >> configure.log

# see if shared library build supported
cat > $test.c <<EOF
extern int getchar();
int hello() {return getchar();}
EOF
if test $shared -eq 1; then
  printf "Checking for shared library support... " | tee -a configure.log
  # we must test in two steps (cc then ld), required at least on SunOS 4.x
  if try $CC -c $SFLAGS $test.c &&
     try $LDSHARED $LDSHAREDFLAGS $LDFLAGS -o $test$shared_ext $test.o $LDSHAREDLIBC; then
    echo "Building shared library $SHAREDTARGET with $CC." | tee -a configure.log
  elif test -z "$old_cc" -a -z "$old_cflags"; then
    echo "No shared library support." | tee -a configure.log
    shared=0;
  else
    echo 'No shared library support; try without defining CC and CFLAGS' | tee -a configure.log
    shared=0;
  fi
fi
if test $shared -eq 0; then
  LDSHARED="$CC"
  LDSHAREDFLAGS=""
  ALL="static"
  SHAREDLIB=""
  SHAREDLIBV=""
  SHAREDLIBM=""
  SHAREDTARGET=""
  INSTALLTARGETS=install-static
  UNINSTALLTARGETS=uninstall-static
  echo Building static library $STATICLIB version $VER with $CC. | tee -a configure.log
else
  ALL="static shared"
  TEST="${TEST} testshared"
fi

echo >> configure.log

# check for version script support
cat > $test.c <<EOF
int foo(void) { return 0; }
EOF
cat > $test.map <<EOF
{
  global:
    foo;
  local:
    *;
};
EOF
if test $shared -eq 1; then
  LDVERSIONSCRIPT="-Wl,--version-script,$SRCDIR/$MAPNAME"
  if try $CC -c $SFLAGS $test.c && try $LDSHARED $LDVERSIONSCRIPT $LDSHAREDFLAGS $LDFLAGS -o $test$shared_ext $test.o $LDSHAREDLIBC; then
    echo "Checking for version script support... $LDVERSIONSCRIPT." | tee -a configure.log
  else
    echo "Checking for version script support... No." | tee -a configure.log
    LDVERSIONSCRIPT=""
  fi
fi
echo >> configure.log

# check for large file support, and if none, check for fseeko()
cat > $test.c <<EOF
#include <sys/types.h>
off64_t dummy = 0;
EOF
if try $CC -c $CFLAGS -D_LARGEFILE64_SOURCE=1 $test.c; then
  CFLAGS="${CFLAGS} -D_LARGEFILE64_SOURCE=1"
  SFLAGS="${SFLAGS} -D_LARGEFILE64_SOURCE=1"
  echo "Checking for off64_t... Yes." | tee -a configure.log
  echo "Checking for fseeko... Yes." | tee -a configure.log
else
  echo "Checking for off64_t... No." | tee -a configure.log
  echo >> configure.log
  cat > $test.c <<EOF
#include <sys/types.h>
int main() {
  _off64_t dummy = 0;
  return 0;
}
EOF
  if try $CC $CFLAGS -o $test $test.c $LDSHAREDLIBC; then
    echo "Checking for _off64_t... Yes." | tee -a configure.log
  else
    echo "Checking for _off64_t... No." | tee -a configure.log
  fi
  echo >> configure.log
  cat > $test.c <<EOF
#include <stdio.h>
int main(void) {
  fseeko(NULL, 0, 0);
  return 0;
}
EOF
  if try $CC $CFLAGS -o $test $test.c $LDSHAREDLIBC; then
    echo "Checking for fseeko... Yes." | tee -a configure.log
  else
    CFLAGS="${CFLAGS} -DNO_FSEEKO"
    SFLAGS="${SFLAGS} -DNO_FSEEKO"
    echo "Checking for fseeko... No." | tee -a configure.log
  fi
fi
echo >> configure.log

cat > $test.c <<EOF
#define _POSIX_C_SOURCE 200112L
#include <stdlib.h>
int main(void) {
  void *ptr = 0;
  int ret = posix_memalign(&ptr, 64, 10);
  if (ptr)
    free(ptr);
  return ret;
}
EOF
if try $CC $CFLAGS -o $test $test.c $LDSHAREDLIBC; then
  echo "Checking for posix_memalign... Yes." | tee -a configure.log
  CFLAGS="${CFLAGS} -DHAVE_POSIX_MEMALIGN"
  SFLAGS="${SFLAGS} -DHAVE_POSIX_MEMALIGN"
else
  echo "Checking for posix_memalign... No." | tee -a configure.log
fi
echo >> configure.log

cat > $test.c <<EOF
#define _ISOC11_SOURCE 1
#include <stdlib.h>
int main(void) {
  void *ptr = aligned_alloc(64, 10);
  if (ptr)
    free(ptr);
  return 0;
}
EOF
if try $CC $CFLAGS -o $test $test.c $LDSHAREDLIBC; then
  echo "Checking for aligned_alloc... Yes." | tee -a configure.log
  CFLAGS="${CFLAGS} -DHAVE_ALIGNED_ALLOC"
  SFLAGS="${SFLAGS} -DHAVE_ALIGNED_ALLOC"
else
  echo "Checking for aligned_alloc... No." | tee -a configure.log
fi
echo >> configure.log

# check for strerror() for use by gz* functions
cat > $test.c <<EOF
#include <string.h>
#include <errno.h>
int main() { return strlen(strerror(errno)); }
EOF
if try $CC $CFLAGS -o $test $test.c $LDSHAREDLIBC; then
  echo "Checking for strerror... Yes." | tee -a configure.log
else
  CFLAGS="${CFLAGS} -DNO_STRERROR"
  SFLAGS="${SFLAGS} -DNO_STRERROR"
  echo "Checking for strerror... No." | tee -a configure.log
fi

# check for getauxval() or elf_aux_info() for architecture feature detection at run-time
cat > $test.c <<EOF
#include <sys/auxv.h>
int main() {
#ifdef __FreeBSD__
  int test;
  return elf_aux_info(AT_PAGESZ, &test, sizeof(test));
#else
  return getauxval(0);
#endif
}
EOF
if try $CC $CFLAGS -o $test $test.c $LDSHAREDLIBC; then
  echo "Checking for getauxval() or elf_aux_info() in sys/auxv.h... Yes." | tee -a configure.log
  CFLAGS="${CFLAGS} -DHAVE_SYS_AUXV_H"
  SFLAGS="${SFLAGS} -DHAVE_SYS_AUXV_H"
else
  echo "Checking for getauxval() in sys/auxv.h... No." | tee -a configure.log
fi

# We need to remove consigured files (zconf.h etc) from source directory if building outside of it
if [ "$SRCDIR" != "$BUILDDIR" ]; then
    rm -f $SRCDIR/zconf${SUFFIX}.h
    rm -f $SRCDIR/zlib${SUFFIX}.h
    rm -f $SRCDIR/zlib_name_mangling${SUFFIX}.h
fi

# Rename @ZLIB_SYMBOL_PREFIX@ to $symbol_prefix in gzread.c, zlib.h and zlib_name_mangling.h
sed < $SRCDIR/gzread.c.in "s/@ZLIB_SYMBOL_PREFIX@/$symbol_prefix/g" > gzread.c
sed < $SRCDIR/zlib${SUFFIX}.h.in "s/@ZLIB_SYMBOL_PREFIX@/$symbol_prefix/g" > zlib${SUFFIX}.h
if [ ! -z "$symbol_prefix" ]; then
  sed < $SRCDIR/zlib_name_mangling${SUFFIX}.h.in "s/@ZLIB_SYMBOL_PREFIX@/$symbol_prefix/g" > zlib_name_mangling${SUFFIX}.h
else
  # symbol_prefix is not set, copy the empty mangling header
  cp -p $SRCDIR/zlib_name_mangling.h.empty zlib_name_mangling${SUFFIX}.h
fi

# copy clean zconf.h for subsequent edits
cp -p $SRCDIR/zconf${SUFFIX}.h.in zconf${SUFFIX}.h

echo >> configure.log

# check for unistd.h and save result in zconf.h
cat > $test.c <<EOF
#include <unistd.h>
int main() { return 0; }
EOF
if try $CC -c $CFLAGS $test.c; then
  sed < zconf${SUFFIX}.h "/^#ifdef HAVE_UNISTD_H.* may be/s/def HAVE_UNISTD_H\(.*\) may be/ 1\1 was/" > zconf${SUFFIX}.temp.h
  mv zconf${SUFFIX}.temp.h zconf${SUFFIX}.h
  echo "Checking for unistd.h... Yes." | tee -a configure.log
else
  sed < zconf${SUFFIX}.h "/^#ifdef HAVE_UNISTD_H.* may be/s/def HAVE_UNISTD_H\(.*\) may be set to #if 1/ 0\1 was set to #if 0/" > zconf${SUFFIX}.temp.h
  mv zconf${SUFFIX}.temp.h zconf${SUFFIX}.h
  echo "Checking for unistd.h... No." | tee -a configure.log
fi

echo >> configure.log

# check for ptrdiff_t and save result in zconf.h
printf "Checking for ptrdiff_t... " | tee -a configure.log
cat > $test.c <<EOF
#include <stddef.h>
int fun(ptrdiff_t *a) { (void)a; return 0; }
EOF
if try $CC -c $CFLAGS $test.c; then
  echo "Yes." | tee -a configure.log
else
    echo "No." | tee -a configure.log
    sed < zconf${SUFFIX}.h "/^#ifdef NEED_PTRDIFF_T.* may be/s/def NEED_PTRDIFF_T\(.*\) may be/ 1\1 was/" > zconf${SUFFIX}.temp.h
    mv zconf${SUFFIX}.temp.h zconf${SUFFIX}.h

    printf "Checking for sizeof(void *)... " | tee -a configure.log
    cat > $test.c <<EOF
#include <stdint.h>
#define COMPILE_TIME_ASSERT(pred) struct s { int x: (pred) ? 1 : -1; }
COMPILE_TIME_ASSERT(sizeof(int32_t) == sizeof(void *));
EOF
    if try $CC -c $CFLAGS $test.c; then
        echo "sizeof(int32_t)." | tee -a configure.log
        sed < zconf${SUFFIX}.h "s/^typedef PTRDIFF_TYPE ptrdiff_t;/typedef int32_t ptrdiff_t;/g" > zconf${SUFFIX}.temp.h
        mv zconf${SUFFIX}.temp.h zconf${SUFFIX}.h
    else
        cat > $test.c <<EOF
#include <stdint.h>
#define COMPILE_TIME_ASSERT(pred) struct s { int x: (pred) ? 1 : -1; }
COMPILE_TIME_ASSERT(sizeof(int64_t) == sizeof(void *));
EOF
        if try $CC -c $CFLAGS $test.c; then
            echo "sizeof(int64_t)." | tee -a configure.log
            sed < zconf${SUFFIX}.h "s/^typedef PTRDIFF_TYPE ptrdiff_t;/typedef int64_t ptrdiff_t;/g" > zconf${SUFFIX}.temp.h
            mv zconf${SUFFIX}.temp.h zconf${SUFFIX}.h
        else
            echo "unknown." | tee -a configure.log
            exit 1
        fi
    fi
fi

# if --zlib-compat was requested
if test $compat -eq 1; then
  gzfileops=1
  CFLAGS="${CFLAGS} -DZLIB_COMPAT"
  SFLAGS="${SFLAGS} -DZLIB_COMPAT"
  case "$uname" in
  CYGWIN* | Cygwin* | cygwin* | MSYS* | msys* | MINGW* | mingw*)
    DEFFILE="win32/zlibcompat.def" ;;
  esac
fi

if [ ! -z "$DEFFILE" ]; then
  mkdir -p win32
  sed < $SRCDIR/$DEFFILE.in "s/@ZLIB_SYMBOL_PREFIX@/$symbol_prefix/g" > $DEFFILE
fi

# if --gzfileops was requested
if test $gzfileops -eq 1; then
  CFLAGS="${CFLAGS} -DWITH_GZFILEOP"
  SFLAGS="${SFLAGS} -DWITH_GZFILEOP"
  OBJC="${OBJC} \$(OBJG)"
  PIC_OBJC="${PIC_OBJC} \$(PIC_OBJG)"
else
  TESTOBJG="\$(OBJG)"
  PIC_TESTOBJG="\$(OBJG)"
fi

# enable reduced memory configuration
if test $reducedmem -eq 1; then
  echo "Configuring for reduced memory environment." | tee -a configure.log
  CFLAGS="${CFLAGS} -DHASH_SIZE=32768u -DGZBUFSIZE=8192 -DNO_LIT_MEM"
fi

# if code coverage testing was requested, use older gcc if defined, e.g. "gcc-4.2" on Mac OS X
if test $cover -eq 1; then
  CFLAGS="${CFLAGS} -fprofile-arcs -ftest-coverage"
  LDFLAGS="${LDFLAGS} -fprofile-arcs -ftest-coverage"
  if test -n "$GCC_CLASSIC"; then
    CC=$GCC_CLASSIC
  fi
fi

echo >> configure.log

# Check for ANSI C compliant compiler
cat > $test.c <<EOF
#include <stdint.h>
#include <stdio.h>
#include <stdarg.h>
#include "zconf${SUFFIX}.h"
int main() {
#ifdef STDC
  return 0;
#endif
  return 1;
}
EOF
if try $CC -c $CFLAGS $test.c; then
  echo "Checking for ANSI C compliant compiler...  Yes." | tee -a configure.log
  :
else
  echo "Checking for ANSI C compliant compiler...  No." | tee -a configure.log
  echo "Error: ANSI C compatible compiler needed, cannot continue." | tee -a configure.log
  leave 1
fi

# Check for -fno-semantic-interposition compiler support
echo "" > test.c
  cat > $test.c <<EOF
int main() { return 0; }
EOF
if test "$gcc" -eq 1 && ($cc $CFLAGS -fno-semantic-interposition -c $test.c) >> configure.log 2>&1; then
  echo "Checking for -fno-semantic-interposition... Yes." | tee -a configure.log
  SFLAGS="$SFLAGS -fno-semantic-interposition"
else
  echo "Checking for -fno-semantic-interposition... No." | tee -a configure.log
fi

# Check for -fno-lto compiler support
if test $gcc -eq 1 -a $without_optimizations -eq 0; then
  cat > $test.c <<EOF
int main() { return 0; }
EOF
  if $cc $CFLAGS -fno-lto -c $test.c >> configure.log 2>&1; then
    echo "Checking for -fno-lto... Yes." | tee -a configure.log
  else
    echo "Checking for -fno-lto... No." | tee -a configure.log
    noltoflag=""
  fi
fi

# see if we can hide zlib internal symbols that are linked between separate source files using hidden
if test "$gcc" -eq 1 && test "$visibility" -eq 1; then
  echo >> configure.log
  cat > $test.c <<EOF
#define Z_INTERNAL __attribute__((visibility ("hidden")))
int Z_INTERNAL foo;
int main() { return 0; }
EOF
  if try $CC $CFLAGS $test.c; then
    CFLAGS="$CFLAGS -DHAVE_VISIBILITY_HIDDEN"
    SFLAGS="$SFLAGS -DHAVE_VISIBILITY_HIDDEN"
    echo >> configure.log
    echo "Checking for attribute(visibility(hidden)) support... Yes." | tee -a configure.log
  else
    echo >> configure.log
    echo "Checking for attribute(visibility(hidden)) support... No." | tee -a configure.log
  fi
fi

# see if we can hide zlib internal symbols that are linked between separate source files using internal
if test "$gcc" -eq 1 && test "$visibility" -eq 1; then
  echo >> configure.log
  cat > $test.c <<EOF
#define Z_INTERNAL __attribute__((visibility ("internal")))
int Z_INTERNAL foo;
int main() { return 0; }
EOF
  if try $CC $CFLAGS $test.c; then
    CFLAGS="$CFLAGS -DHAVE_VISIBILITY_INTERNAL"
    SFLAGS="$SFLAGS -DHAVE_VISIBILITY_INTERNAL"
    echo >> configure.log
    echo "Checking for attribute(visibility(internal)) support... Yes." | tee -a configure.log
  else
    echo >> configure.log
    echo "Checking for attribute(visibility(internal)) support... No." | tee -a configure.log
  fi
fi

# Check for attribute(aligned) support in compiler
cat > $test.c << EOF
int main(void) {
  __attribute__((aligned(8))) int test = 0;
  (void)test;
  return 0;
}
EOF
if try ${CC} ${CFLAGS} $test.c $LDSHAREDLIBC; then
    echo "Checking for attribute(aligned) ... Yes." | tee -a configure.log
    CFLAGS="$CFLAGS -DHAVE_ATTRIBUTE_ALIGNED"
    SFLAGS="$SFLAGS -DHAVE_ATTRIBUTE_ALIGNED"
else
    echo "Checking for attribute(aligned) ... No." | tee -a configure.log
fi

# Check for __builtin_assume_aligned(x,n) support in compiler
cat > $test.c << EOF
char *test(char *buffer) {
    char *abuffer = __builtin_assume_aligned(buffer,64);
    return abuffer;
}
int main() {
    return 0;
}
EOF
if try ${CC} ${CFLAGS} $test.c $LDSHAREDLIBC; then
    echo "Checking for __builtin_assume_aligned() ... Yes." | tee -a configure.log
    CFLAGS="$CFLAGS -DHAVE_BUILTIN_ASSUME_ALIGNED"
    SFLAGS="$SFLAGS -DHAVE_BUILTIN_ASSUME_ALIGNED"
else
    echo "Checking for __builtin_assume_aligned() ... No." | tee -a configure.log
fi

# Check for __builtin_ctz() support in compiler
cat > $test.c << EOF
long f(unsigned int x) { return __builtin_ctz(x); }
int main(void) { return 0; }
EOF
if try ${CC} ${CFLAGS} $test.c $LDSHAREDLIBC; then
    echo "Checking for __builtin_ctz ... Yes." | tee -a configure.log
    CFLAGS="$CFLAGS -DHAVE_BUILTIN_CTZ"
    SFLAGS="$SFLAGS -DHAVE_BUILTIN_CTZ"
else
    echo "Checking for __builtin_ctz ... No." | tee -a configure.log
fi

# Check for __builtin_ctzll() support in compiler
cat > $test.c << EOF
long f(unsigned long long x) { return __builtin_ctzll(x); }
int main(void) { return 0; }
EOF
if try ${CC} ${CFLAGS} $test.c $LDSHAREDLIBC; then
    echo "Checking for __builtin_ctzll ... Yes." | tee -a configure.log
    CFLAGS="$CFLAGS -DHAVE_BUILTIN_CTZLL"
    SFLAGS="$SFLAGS -DHAVE_BUILTIN_CTZLL"
else
    echo "Checking for __builtin_ctzll ... No." | tee -a configure.log
fi

check_avx2_intrinsics() {
    # Check whether compiler supports AVX2 intrinsics
    cat > $test.c << EOF
#include <immintrin.h>
__m256i f(__m256i x) {
    const __m256i y = _mm256_set1_epi16(1);
    return _mm256_subs_epu16(x, y);
}
int main(void) { return 0; }
EOF
    if try ${CC} ${CFLAGS} ${avx2flag} $test.c; then
        echo "Checking for AVX2 intrinsics ... Yes." | tee -a configure.log
        HAVE_AVX2_INTRIN=1
    else
        echo "Checking for AVX2 intrinsics ... No." | tee -a configure.log
        HAVE_AVX2_INTRIN=0
    fi
}

check_avx512_intrinsics() {
    # Check whether compiler supports AVX512 intrinsics
    cat > $test.c << EOF
#include <immintrin.h>
__m512i f(__m512i y) {
  __m512i x = _mm512_set1_epi8(2);
  return _mm512_sub_epi8(x, y);
}
int main(void) { return 0; }
EOF
    if try ${CC} ${CFLAGS} ${avx512flag} $test.c; then
        echo "Checking for AVX512 intrinsics ... Yes." | tee -a configure.log
        HAVE_AVX512_INTRIN=1
    else
        echo "Checking for AVX512 intrinsics ... No." | tee -a configure.log
        HAVE_AVX512_INTRIN=0
    fi
}

check_mtune_skylake_avx512_compiler_flag() {
    # Check whether -mtune=skylake-avx512 works correctly
    cat > $test.c << EOF
int main() { return 0; }
EOF
    if try $CC -c $CFLAGS -mtune=skylake-avx512 $test.c; then
        MTUNE_SKYLAKE_AVX512_AVAILABLE=1
        echo "Check whether -mtune=skylake-avx512 works ... Yes." | tee -a configure.log
    else
        echo "Check whether -mtune=skylake-avx512 works ... No." | tee -a configure.log
        MTUNE_SKYLAKE_AVX512_AVAILABLE=0
    fi
}

check_mtune_cascadelake_compiler_flag() {
    # Check whether -mtune=cascadelake works correctly
    cat > $test.c << EOF
int main() { return 0; }
EOF
    if try $CC -c $CFLAGS -mtune=cascadelake $test.c; then
        MTUNE_CASCADELAKE_AVAILABLE=1
        echo "Check whether -mtune=cascadelake works ... Yes." | tee -a configure.log
    else
        echo "Check whether -mtune=cascadelake works ... No." | tee -a configure.log
        MTUNE_CASCADELAKE_AVAILABLE=0
        check_mtune_skylake_avx512_compiler_flag
    fi
}

check_avx512vnni_intrinsics() {
    # Check whether compiler supports AVX512-VNNI intrinsics
    cat > $test.c << EOF
#include <immintrin.h>
__m512i f(__m512i x, __m512i y) {
    __m512i z = _mm512_setzero_epi32();
    return _mm512_dpbusd_epi32(z, x, y);
}
int main(void) { return 0; }
EOF
    if try ${CC} ${CFLAGS} ${avx512vnniflag} $test.c; then
        echo "Checking for AVX512VNNI intrinsics ... Yes." | tee -a configure.log
        HAVE_AVX512VNNI_INTRIN=1
    else
        echo "Checking for AVX512VNNI intrinsics ... No." | tee -a configure.log
        HAVE_AVX512VNNI_INTRIN=0
    fi
}

check_acle_compiler_flag() {
    # Check whether -march=armv8-a+crc works correctly
    cat > $test.c << EOF
int main() { return 0; }
EOF
    if try $CC -c $CFLAGS -march=armv8-a+crc $test.c; then
        echo "Check whether -march=armv8-a+crc works ... Yes." | tee -a configure.log
        acleflag="-march=armv8-a+crc"
    else
        echo "Check whether -march=armv8-a+crc works ... No." | tee -a configure.log
        if try $CC -c $CFLAGS -march=armv8-a+crc+simd $test.c; then
            echo "Check whether -march=armv8-a+crc+simd works ... Yes." | tee -a configure.log
            acleflag="-march=armv8-a+crc+simd"
        else
            echo "Check whether -march=armv8-a+crc+simd works ... No." | tee -a configure.log
        fi
    fi

    # Check whether compiler supports ARMv8 CRC intrinsics
    cat > $test.c << EOF
#include <arm_acle.h>
unsigned int f(unsigned int a, unsigned int b) {
    return __crc32w(a, b);
}
int main(void) { return 0; }
EOF
    if try ${CC} ${CFLAGS} ${acleflag} $test.c; then
        echo "Checking for ARMv8 CRC intrinsics ... Yes." | tee -a configure.log
        ACLE_AVAILABLE=1
    else
        echo "Checking for ARMv8 CRC intrinsics ... No." | tee -a configure.log
        ACLE_AVAILABLE=0
    fi
}

check_neon_compiler_flag() {
    if test "$ARCH" = "aarch64"; then
        neonflag="-march=armv8-a+simd"
    else
        neonflag="-mfpu=neon"
    fi
    # Check whether neon flag is available on ARM processors.
    cat > $test.c << EOF
#if defined(_M_ARM64) || defined(_M_ARM64EC)
 #  include <arm64_neon.h>
 #else
 #  include <arm_neon.h>
#endif
int main() { return 0; }
EOF
    if try $CC -c $CFLAGS $neonflag $test.c; then
        NEON_AVAILABLE=1
        echo "Check whether $neonflag is available ... Yes." | tee -a configure.log
    else
        NEON_AVAILABLE=0
        echo "Check whether $neonflag is available ... No." | tee -a configure.log
    fi
}

check_neon_ld4_intrinsics() {
    cat > $test.c << EOF
#if defined(_MSC_VER) && (defined(_M_ARM64) || defined(_M_ARM64EC))
#  include <arm64_neon.h>
#else
#  include <arm_neon.h>
#endif
int32x4x4_t f(int var[16]) { return vld1q_s32_x4(var); }
int main(void) { return 0; }
EOF
    if try $CC -c $CFLAGS $neonflag $test.c; then
        NEON_HAS_LD4=1
        echo "check whether compiler supports 4 wide register loads ... Yes." | tee -a configure.log
    else
        NEON_HAS_LD4=0
        echo "check whether compiler supports 4 wide register loads ... No." | tee -a configure.log
    fi
}

check_armv6_intrinsics() {
    # Check whether -march=armv6 works correctly
    cat > $test.c << EOF
int main() { return 0; }
EOF
    if try $CC -c $CFLAGS -march=armv6 $test.c; then
        armv6flag=-march=armv6
        echo "Check whether -march=armv6 works ... Yes." | tee -a configure.log
    else
        echo "Check whether -march=armv6 works ... No." | tee -a configure.log
    fi

    # Check whether compiler supports ARMv6 inline asm
    cat > $test.c << EOF
unsigned int f(unsigned int a, unsigned int b) {
    unsigned int c;
    __asm__ __volatile__ ( "uqsub16 %0, %1, %2" : "=r" (c) : "r" (a), "r" (b) );
    return c;
}
int main(void) { return 0; }
EOF
    if try ${CC} ${CFLAGS} ${armv6flag} $test.c; then
        echo "Checking for ARMv6 inline assembly ... Yes." | tee -a configure.log
        HAVE_ARMV6_INLINE_ASM=1
    else
        echo "Checking for ARMv6 inline assembly ... No." | tee -a configure.log
        HAVE_ARMV6_INLINE_ASM=0
    fi

    # Check whether compiler supports ARMv6 intrinsics
    cat > $test.c << EOF
#include <arm_acle.h>
unsigned int f(unsigned int a, unsigned int b) {
    return __uqsub16(a, b);
}
int main(void) { return f(1, 2); }
EOF
    if try ${CC} ${CFLAGS} ${armv6flag} $test.c; then
        echo "Checking for ARMv6 intrinsics ... Yes." | tee -a configure.log
        HAVE_ARMV6_INTRIN=1
    else
        echo "Checking for ARMv6 intrinsics ... No." | tee -a configure.log
        HAVE_ARMV6_INTRIN=0
    fi
}

check_pclmulqdq_intrinsics() {
    # Check whether compiler supports PCLMULQDQ intrinsics
    cat > $test.c << EOF
#include <immintrin.h>
#include <wmmintrin.h>
__m128i f(__m128i a, __m128i b) { return _mm_clmulepi64_si128(a, b, 0x10); }
int main(void) { return 0; }
EOF
    if try ${CC} ${CFLAGS} ${pclmulflag} $test.c; then
        echo "Checking for PCLMULQDQ intrinsics ... Yes." | tee -a configure.log
        HAVE_PCLMULQDQ_INTRIN=1
    else
        echo "Checking for PCLMULQDQ intrinsics ... No." | tee -a configure.log
        HAVE_PCLMULQDQ_INTRIN=0
    fi
}

check_vpclmulqdq_intrinsics() {
    # Check whether compiler supports VPCLMULQDQ intrinsics
    cat > $test.c << EOF
#include <immintrin.h>
#include <wmmintrin.h>
__m512i f(__m512i a) {
    __m512i b = _mm512_setzero_si512();
    return _mm512_clmulepi64_epi128(a, b, 0x10);
}
int main(void) { return 0; }
EOF
    if try ${CC} ${CFLAGS} ${vpclmulflag} $test.c; then
        echo "Checking for VPCLMULQDQ intrinsics ... Yes." | tee -a configure.log
        HAVE_VPCLMULQDQ_INTRIN=1
    else
        echo "Checking for VPCLMULQDQ intrinsics ... No." | tee -a configure.log
        HAVE_VPCLMULQDQ_INTRIN=0
    fi
}

check_xsave_intrinsics() {
   # Check whether compiler supports XSAVE intrinsics
   cat > $test.c << EOF
#ifdef _MSC_VER
#  include <intrin.h>
#elif __GNUC__ == 8 && __GNUC_MINOR__ > 1
#  include <xsaveintrin.h>
#else
#  include <immintrin.h>
#endif
unsigned int f(unsigned int a) { return (int) _xgetbv(a); }
int main(void) { return 0; }
EOF
    if try ${CC} ${CFLAGS} ${xsaveflag} $test.c; then
        echo "Checking for XSAVE intrinsics ... Yes." | tee -a configure.log
        HAVE_XSAVE_INTRIN=1
    else
        echo "Checking for XSAVE intrinsics ... No." | tee -a configure.log
        HAVE_XSAVE_INTRIN=0
    fi
}

check_ppc_intrinsics() {
        cat > $test.c << EOF
#include <altivec.h>
int main(void)
{
    vector int a = vec_splats(0);
    vector int b = vec_splats(0);
    a = vec_add(a, b);
    return 0;
}
EOF
        if test $buildaltivec -eq 1 && try ${CC} ${CFLAGS} -maltivec $test.c; then
            echo "Checking for AltiVec intrinsics ... Yes." | tee -a configure.log
            HAVE_ALTIVEC_INTRIN=1
        else
            echo "Checking for AltiVec intrinsics ... No." | tee -a configure.log
            HAVE_ALTIVEC_INTRIN=0
        fi
        if test $buildaltivec -eq 1 && try ${CC} ${CFLAGS} -maltivec -mno-vsx $test.c; then
            echo "Checking if -mno-vsx is supported ... Yes." | tee -a configure.log
            vmxflag="$vmxflag -mno-vsx"
        else
            echo "Checking if -mno-vsx is supported ... No." | tee -a configure.log
        fi
        cat > $test.c << EOF
#ifdef __FreeBSD__
#include <machine/cpu.h>
#endif
#include <sys/auxv.h>
int main() {
#ifdef __FreeBSD__
  unsigned long hwcap;
  elf_aux_info(AT_HWCAP, &hwcap, sizeof(hwcap));
  return (hwcap & PPC_FEATURE_HAS_ALTIVEC);
#else
  return (getauxval(AT_HWCAP) & PPC_FEATURE_HAS_ALTIVEC);
#endif
}
EOF
        if try $CC -c $CFLAGS -maltivec $test.c; then
            HAVE_VMX=1
            echo "Check whether VMX instructions are available ... Yes." | tee -a configure.log
        else
            HAVE_VMX=0
            echo "Check whether VMX instructions are available ... No." | tee -a configure.log
        fi
}

check_power8_intrinsics() {
    # Check whether features needed by POWER8 optimisations are available
    cat > $test.c << EOF
#ifdef __FreeBSD__
#include <machine/cpu.h>
#endif
#include <sys/auxv.h>
int main() {
#ifdef __FreeBSD__
  unsigned long hwcap;
  elf_aux_info(AT_HWCAP2, &hwcap, sizeof(hwcap));
  return (hwcap & PPC_FEATURE2_ARCH_2_07);
#else
  return (getauxval(AT_HWCAP2) & PPC_FEATURE2_ARCH_2_07);
#endif
}
EOF
    if test $buildpower8 -eq 1 && try $CC -c $CFLAGS -mcpu=power8 $test.c; then
        HAVE_POWER8_INTRIN=1
        echo "Check whether POWER8 instructions are available ... Yes." | tee -a configure.log
    else
        HAVE_POWER8_INTRIN=0
        echo "Check whether POWER8 instructions are available ... No." | tee -a configure.log
    fi
}

check_power9_intrinsics() {
    # Check whether features needed by POWER9 optimisations are available
    cat > $test.c << EOF
#ifdef __FreeBSD__
#include <machine/cpu.h>
#endif
#include <sys/auxv.h>
int main() {
#ifdef __FreeBSD__
  unsigned long hwcap;
  elf_aux_info(AT_HWCAP2, &hwcap, sizeof(hwcap));
  return (hwcap & PPC_FEATURE2_ARCH_3_00);
#else
  return (getauxval(AT_HWCAP2) & PPC_FEATURE2_ARCH_3_00);
#endif
}
EOF
    if test $buildpower9 -eq 1 && try $CC -c $CFLAGS -mcpu=power9 $test.c; then
        HAVE_POWER9_INTRIN=1
        echo "Check whether POWER9 instructions are available ... Yes." | tee -a configure.log
    else
        HAVE_POWER9_INTRIN=0
        echo "Check whether POWER9 instructions are available ... No." | tee -a configure.log
    fi
}

check_sse2_intrinsics() {
    # Check whether compiler supports SSE2 intrinsics
    cat > $test.c << EOF
#include <immintrin.h>
__m128i f(__m128i x, __m128i y) { return _mm_sad_epu8(x, y); }
int main(void) { return 0; }
EOF
    if try ${CC} ${CFLAGS} ${sse2flag} $test.c; then
        echo "Checking for SSE2 intrinsics ... Yes." | tee -a configure.log
        HAVE_SSE2_INTRIN=1
    else
        echo "Checking for SSE2 intrinsics ... No." | tee -a configure.log
        HAVE_SSE2_INTRIN=0
    fi
}

check_sse42_intrinsics() {
    # Check whether compiler supports SSE4.2 intrinsics
    cat > $test.c << EOF
#include <nmmintrin.h>
unsigned int f(unsigned int a, unsigned int b) { return _mm_crc32_u32(a, b); }
int main(void) { return 0; }
EOF
    if try ${CC} ${CFLAGS} ${sse42flag} $test.c; then
        echo "Checking for SSE4.2 intrinsics ... Yes." | tee -a configure.log
        HAVE_SSE42_INTRIN=1
    else
        echo "Checking for SSE4.2 intrinsics ... No." | tee -a configure.log
        HAVE_SSE42_INTRIN=0
    fi
}

check_ssse3_intrinsics() {
    # Check whether compiler supports SSSE3 intrinsics
    cat > $test.c << EOF
#include <immintrin.h>
__m128i f(__m128i u) {
  __m128i v = _mm_set1_epi32(1);
  return _mm_hadd_epi32(u, v);
}
int main(void) { return 0; }
EOF
    if try ${CC} ${CFLAGS} ${ssse3flag} $test.c; then
        echo "Checking for SSSE3 intrinsics ... Yes." | tee -a configure.log
        HAVE_SSSE3_INTRIN=1
    else
        echo "Checking for SSSE3 intrinsics ... No." | tee -a configure.log
        HAVE_SSSE3_INTRIN=0
    fi
}

check_vgfma_intrinsics() {
    # Check whether "VECTOR GALOIS FIELD MULTIPLY SUM AND ACCUMULATE" intrinsic is available
    printf "Checking for -mzarch... " | tee -a configure.log
    if try $CC -x c -c /dev/null -o /dev/null -mzarch; then
        echo Yes. | tee -a configure.log
        vgfmaflag="${vgfmaflag} -mzarch"
    else
        echo No. | tee -a configure.log
    fi
    printf "Checking for -fzvector... " | tee -a configure.log
    if try $CC -x c -c /dev/null -o /dev/null -fzvector; then
        echo Yes. | tee -a configure.log
        vgfmaflag="${vgfmaflag} -fzvector"
    else
        echo No. | tee -a configure.log
    fi
    cat > $test.c << EOF
#include <vecintrin.h>
int main(void) {
    unsigned long long a __attribute__((vector_size(16))) = { 0 };
    unsigned long long b __attribute__((vector_size(16))) = { 0 };
    unsigned char c __attribute__((vector_size(16))) = { 0 };
    c = vec_gfmsum_accum_128(a, b, c);
    return c[0];
}
EOF
    printf "Checking for VGFMA support... " | tee -a configure.log
    if try $CC -c $CFLAGS $vgfmaflag $test.c; then
        HAVE_VGFMA_INTRIN=1
        echo "Yes." | tee -a configure.log
    else
        HAVE_VGFMA_INTRIN=0
        echo "No." | tee -a configure.log
    fi
}

# Check whether to disable deflate_medium and deflate_quick
if test $without_new_strategies -eq 1; then
    CFLAGS="${CFLAGS} -DNO_QUICK_STRATEGY -DNO_MEDIUM_STRATEGY"
    SFLAGS="${SFLAGS} -DNO_QUICK_STRATEGY -DNO_MEDIUM_STRATEGY"
fi

ARCHDIR='arch/generic'
ARCH_STATIC_OBJS=''
ARCH_SHARED_OBJS=''

# Set ARCH specific FLAGS
case "${ARCH}" in
    # x86/amd64 specific optimizations
    i386 | i486 | i586 | i686 |x86_64)
        ARCHDIR=arch/x86

        # Enable arch-specific optimizations
        if test $without_optimizations -eq 0; then
            CFLAGS="${CFLAGS} -DX86_FEATURES"
            SFLAGS="${SFLAGS} -DX86_FEATURES"

            ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} x86_features.o"
            ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} x86_features.lo"

            check_xsave_intrinsics

            if test ${HAVE_XSAVE_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_HAVE_XSAVE_INTRIN"
                SFLAGS="${SFLAGS} -DX86_HAVE_XSAVE_INTRIN"
            else
                xsaveflag=""
            fi

            check_sse2_intrinsics

            if test ${HAVE_SSE2_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_SSE2"
                SFLAGS="${SFLAGS} -DX86_SSE2"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} chunkset_sse2.o compare256_sse2.o slide_hash_sse2.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} chunkset_sse2.lo compare256_sse2.lo slide_hash_sse2.lo"

                if test $forcesse2 -eq 1; then
                    CFLAGS="${CFLAGS} -DX86_NOCHECK_SSE2"
                    SFLAGS="${SFLAGS} -DX86_NOCHECK_SSE2"
                fi
            fi

            check_ssse3_intrinsics

            if test ${HAVE_SSSE3_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_SSSE3"
                SFLAGS="${SFLAGS} -DX86_SSSE3"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} adler32_ssse3.o chunkset_ssse3.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} adler32_ssse3.lo chunkset_ssse3.lo"
            fi

            check_sse42_intrinsics

            if test ${HAVE_SSE42_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_SSE42"
                SFLAGS="${SFLAGS} -DX86_SSE42"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} adler32_sse42.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} adler32_sse42.lo"
            fi

            check_pclmulqdq_intrinsics

            if test ${HAVE_PCLMULQDQ_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_PCLMULQDQ_CRC"
                SFLAGS="${SFLAGS} -DX86_PCLMULQDQ_CRC"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} crc32_pclmulqdq.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} crc32_pclmulqdq.lo"
            fi

            check_avx2_intrinsics

            if test ${HAVE_AVX2_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_AVX2"
                SFLAGS="${SFLAGS} -DX86_AVX2"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} slide_hash_avx2.o chunkset_avx2.o compare256_avx2.o adler32_avx2.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} slide_hash_avx2.lo chunkset_avx2.lo compare256_avx2.lo adler32_avx2.lo"
            fi

            check_avx512_intrinsics

            if test ${HAVE_AVX512_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_AVX512"
                SFLAGS="${SFLAGS} -DX86_AVX512"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} adler32_avx512.o chunkset_avx512.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} adler32_avx512.lo chunkset_avx512.lo"
            fi

            check_mtune_cascadelake_compiler_flag

            if test ${MTUNE_CASCADELAKE_AVAILABLE} -eq 1; then
                avx512flag="${avx512flag} -mtune=cascadelake"
                avx512vnniflag="${avx512vnniflag} -mtune=cascadelake"
            else
                if test ${MTUNE_SKYLAKE_AVX512_AVAILABLE} -eq 1; then
                    avx512flag="${avx512flag} -mtune=skylake-avx512"
                    avx512vnniflag="${avx512vnniflag} -mtune=skylake-avx512"
                fi
            fi

            check_avx512vnni_intrinsics

            if test ${HAVE_AVX512VNNI_INTRIN} -eq 1; then
                CFLAGS="${CFLAGS} -DX86_AVX512VNNI"
                SFLAGS="${SFLAGS} -DX86_AVX512VNNI"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} adler32_avx512_vnni.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} adler32_avx512_vnni.lo"
            fi

            if test $buildvpclmulqdq -eq 1 && test ${HAVE_PCLMULQDQ_INTRIN} -eq 1 && test ${HAVE_AVX512_INTRIN} -eq 1; then
                check_vpclmulqdq_intrinsics

                if test ${HAVE_VPCLMULQDQ_INTRIN} -eq 1; then
                    CFLAGS="${CFLAGS} -DX86_VPCLMULQDQ_CRC"
                    SFLAGS="${SFLAGS} -DX86_VPCLMULQDQ_CRC"
                    ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} crc32_vpclmulqdq.o"
                    ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} crc32_vpclmulqdq.lo"
                fi
            fi
        fi
    ;;

    # ARM specific optimizations
    arm* | aarch64)
        case "${ARCH}" in
            arm*)
                [ ! -z $CROSS_PREFIX ] && QEMU_ARCH=arm
            ;;
            aarch64)
                [ ! -z $CROSS_PREFIX ] && QEMU_ARCH=aarch64
                buildarmv6=0
            ;;
        esac

        ARCHDIR=arch/arm

        cat > $test.c << EOF
int main() { return 0; }
EOF
        if try $CC -c $SFLAGS $test.c -mfloat-abi=softfp &&
           try $LDSHARED $LDSHAREDFLAGS $LDFLAGS -o $test$shared_ext $test.o $LDSHAREDLIBC; then
            floatabi="-mfloat-abi=softfp"
        else
            if try $CC -c $SFLAGS $test.c -mfloat-abi=hard &&
               try $LDSHARED $LDSHAREDFLAGS $LDFLAGS -o $test$shared_ext $test.o $LDSHAREDLIBC; then
                floatabi="-mfloat-abi=hard"
            fi
        fi

        if [ -z $floatabi ]; then
            echo "ARM floating point arch not auto-detected" | tee -a configure.log
        else
            echo "ARM floating point arch: ${floatabi}" | tee -a configure.log

            CFLAGS="${CFLAGS} ${floatabi}"
            SFLAGS="${SFLAGS} ${floatabi}"
        fi

        if test $without_optimizations -eq 0; then
            CFLAGS="${CFLAGS} -DARM_FEATURES"
            SFLAGS="${SFLAGS} -DARM_FEATURES"
            ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} arm_features.o"
            ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} arm_features.lo"

            cat > $test.c <<EOF
#include <arm_acle.h>
EOF
            if try $CC -c $CFLAGS $test.c; then
                echo "Checking for arm_acle.h... Yes." | tee -a configure.log
                CFLAGS="${CFLAGS} -DHAVE_ARM_ACLE_H"
                SFLAGS="${SFLAGS} -DHAVE_ARM_ACLE_H"
            else
                echo "Checking for arm_acle.h... No." | tee -a configure.log
            fi


            if test $LINUX -eq 1; then
                if test "$ARCH" = "aarch64"; then
                    cat > $test.c <<EOF
#include <sys/auxv.h>
int main() {
    return (getauxval(AT_HWCAP) & HWCAP_CRC32);
}
EOF
                    if try $CC -c $CFLAGS $test.c; then
                        CFLAGS="${CFLAGS} -DARM_AUXV_HAS_CRC32"
                        SFLAGS="${SFLAGS} -DARM_AUXV_HAS_CRC32"
                    else
                        echo "HWCAP_CRC32 not present in sys/auxv.h; cannot detect support at runtime." | tee -a configure.log
                    fi
                else
                    cat > $test.c <<EOF
#include <sys/auxv.h>
int main() {
    return (getauxval(AT_HWCAP2) & HWCAP2_CRC32);
}
EOF
                    if try $CC -c $CFLAGS $test.c; then
                        CFLAGS="${CFLAGS} -DARM_AUXV_HAS_CRC32"
                        SFLAGS="${SFLAGS} -DARM_AUXV_HAS_CRC32"
                    else
                        cat > $test.c <<EOF
#include <sys/auxv.h>
#include <asm/hwcap.h>
int main() {
    return (getauxval(AT_HWCAP2) & HWCAP2_CRC32);
}
EOF
                        if try $CC -c $CFLAGS $test.c; then
                            CFLAGS="${CFLAGS} -DARM_AUXV_HAS_CRC32 -DARM_ASM_HWCAP"
                            SFLAGS="${SFLAGS} -DARM_AUXV_HAS_CRC32 -DARM_ASM_HWCAP"
                        else
                            echo "HWCAP2_CRC32 not present in sys/auxv.h; cannot detect support at runtime." | tee -a configure.log
                        fi
                    fi

                    cat > $test.c <<EOF
#include <sys/auxv.h>
int main() {
    return (getauxval(AT_HWCAP) & HWCAP_ARM_NEON);
}
EOF
                    if try $CC -c $CFLAGS $test.c; then
                        CFLAGS="${CFLAGS} -DARM_AUXV_HAS_NEON"
                        SFLAGS="${SFLAGS} -DARM_AUXV_HAS_NEON"
                    else
                        cat > $test.c <<EOF
#include <sys/auxv.h>
int main() {
    return (getauxval(AT_HWCAP) & HWCAP_NEON);
}
EOF
                        if try $CC -c $CFLAGS $test.c; then
                            CFLAGS="${CFLAGS} -DARM_AUXV_HAS_NEON"
                            SFLAGS="${SFLAGS} -DARM_AUXV_HAS_NEON"
                        else
                            echo "Neither HWCAP_ARM_NEON or HWCAP_NEON present in sys/auxv.h; cannot detect support at runtime." | tee -a configure.log
                        fi
                    fi
                fi
            fi

            if test $buildacle -eq 1; then
                check_acle_compiler_flag

                if test $ACLE_AVAILABLE -eq 1; then
                    CFLAGS="${CFLAGS} -DARM_ACLE"
                    SFLAGS="${SFLAGS} -DARM_ACLE"

                    ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} crc32_acle.o"
                    ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} crc32_acle.lo"
                fi
            fi

            if test $buildneon -eq 1; then
                check_neon_compiler_flag

                if test $NEON_AVAILABLE -eq 1; then
                    CFLAGS="${CFLAGS} -DARM_NEON"
                    SFLAGS="${SFLAGS} -DARM_NEON"

                    check_neon_ld4_intrinsics

                    if test $NEON_HAS_LD4 -eq 1; then
                        CFLAGS="${CFLAGS} -DARM_NEON_HASLD4"
                        SFLAGS="${SFLAGS} -DARM_NEON_HASLD4"
                    fi

                    ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} adler32_neon.o chunkset_neon.o compare256_neon.o slide_hash_neon.o"
                    ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} adler32_neon.lo chunkset_neon.lo compare256_neon.lo slide_hash_neon.lo"
                fi
            fi

            if test $buildarmv6 -eq 1; then
                check_armv6_intrinsics

                if test $HAVE_ARMV6_INTRIN -eq 1 || test $HAVE_ARMV6_INLINE_ASM -eq 1; then
                    CFLAGS="${CFLAGS} -DARM_SIMD"
                    SFLAGS="${SFLAGS} -DARM_SIMD"

                    if test $HAVE_ARMV6_INTRIN -eq 1; then
                        CFLAGS="${CFLAGS} -DARM_SIMD_INTRIN"
                        SFLAGS="${SFLAGS} -DARM_SIMD_INTRIN"
                    fi

                    ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} slide_hash_armv6.o"
                    ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} slide_hash_armv6.lo"
                fi
            fi

        fi
    ;;
    powerpc*)
        case "${ARCH}" in
            powerpc)
                [ ! -z $CROSS_PREFIX ] && QEMU_ARCH=ppc
            ;;
            powerpc64)
                [ ! -z $CROSS_PREFIX ] && QEMU_ARCH=ppc64
            ;;
            powerpc64le)
                [ ! -z $CROSS_PREFIX ] && QEMU_ARCH=ppc64le
            ;;
        esac

        ARCHDIR=arch/power

        if test $without_optimizations -eq 0; then

            check_ppc_intrinsics
            check_power8_intrinsics
            check_power9_intrinsics

            if test $HAVE_VMX -eq 1; then
                CFLAGS="${CFLAGS} -DPPC_FEATURES"
                SFLAGS="${SFLAGS} -DPPC_FEATURES"
            fi
            if test $HAVE_VMX -eq 1 -o $HAVE_POWER8_INTRIN -eq 1; then
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} power_features.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} power_features.lo"
            fi
            if test $HAVE_VMX -eq 1 -a $HAVE_ALTIVEC_INTRIN -eq 1; then
                CFLAGS="${CFLAGS} -DPPC_VMX"
                SFLAGS="${SFLAGS} -DPPC_VMX"

                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} adler32_vmx.o slide_hash_vmx.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} adler32_vmx.lo slide_hash_vmx.lo"
            fi
            if test $HAVE_POWER8_INTRIN -eq 1; then
                CFLAGS="${CFLAGS} -DPOWER8_VSX -DPOWER_FEATURES"
                SFLAGS="${SFLAGS} -DPOWER8_VSX -DPOWER_FEATURES"

                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} adler32_power8.o chunkset_power8.o slide_hash_power8.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} adler32_power8.lo chunkset_power8.lo slide_hash_power8.lo"
                case "${ARCH}" in
                    powerpc64*)
                        ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} crc32_power8.o"
                        ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} crc32_power8.lo"
                        CFLAGS="${CFLAGS} -DPOWER8_VSX_CRC32"
                        SFLAGS="${SFLAGS} -DPOWER8_VSX_CRC32"
                        ;;
                esac
            fi
            if test $HAVE_POWER9_INTRIN -eq 1; then
                CFLAGS="${CFLAGS} -DPOWER9 -DPOWER_FEATURES"
                SFLAGS="${SFLAGS} -DPOWER9 -DPOWER_FEATURES"

                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} compare256_power9.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} compare256_power9.lo"
            fi
        fi
    ;;
    s390x)
        [ ! -z $CROSS_PREFIX ] && QEMU_ARCH=s390x
        ARCHDIR=arch/s390

        if test $without_optimizations -eq 0; then
            if test $buildcrc32vx -eq 1; then
                CFLAGS="${CFLAGS} -DS390_FEATURES"
                SFLAGS="${SFLAGS} -DS390_FEATURES"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} s390_features.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} s390_features.lo"
            fi

            if test $builddfltccdeflate -eq 1; then
                CFLAGS="${CFLAGS} -DS390_DFLTCC_DEFLATE"
                SFLAGS="${SFLAGS} -DS390_DFLTCC_DEFLATE"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} dfltcc_deflate.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} dfltcc_deflate.lo"
                ARCH="${ARCH}+dfltcc-deflate"
            fi

            if test $builddfltccinflate -eq 1; then
                CFLAGS="${CFLAGS} -DS390_DFLTCC_INFLATE"
                SFLAGS="${SFLAGS} -DS390_DFLTCC_INFLATE"
                ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} dfltcc_inflate.o"
                ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} dfltcc_inflate.lo"
                ARCH="${ARCH}+dfltcc-inflate"
            fi

            if test $buildcrc32vx -eq 1; then
                check_vgfma_intrinsics
                if test $HAVE_VGFMA_INTRIN -eq 1; then
                    CFLAGS="${CFLAGS} -DS390_CRC32_VX"
                    SFLAGS="${SFLAGS} -DS390_CRC32_VX"
                    ARCH_STATIC_OBJS="${ARCH_STATIC_OBJS} crc32-vx.o"
                    ARCH_SHARED_OBJS="${ARCH_SHARED_OBJS} crc32-vx.lo"
                    ARCH="${ARCH}+crc32-vx"
                fi
            fi
        fi
    ;;
    *)
        [ ! -z $CROSS_PREFIX ] && QEMU_ARCH=$ARCH
    ;;
esac

echo "Uname: $uname"
echo "ARCH: ${ARCH}"
echo "Using arch directory: ${ARCHDIR}"
echo "Architecture-specific static object files:${ARCH_STATIC_OBJS}"
echo "Architecture-specific shared object files:${ARCH_SHARED_OBJS}"

# show the results in the log
echo >> configure.log
echo ALL = $ALL >> configure.log
echo AR = $AR >> configure.log
echo ARFLAGS = $ARFLAGS >> configure.log
echo CC = $CC >> configure.log
echo CFLAGS = $CFLAGS >> configure.log
echo EXE = $EXE >> configure.log
echo LDCONFIG = $LDCONFIG >> configure.log
echo LDFLAGS = $LDFLAGS >> configure.log
echo LDSHARED = $LDSHARED >> configure.log
echo LDSHAREDFLAGS = $LDSHAREDFLAGS >> configure.log
echo LDSHAREDLIBC = $LDSHAREDLIBC >> configure.log
echo DEFFILE = $DEFFILE >> configure.log
echo RC = $RC >> configure.log
echo RCFLAGS = $RCFLAGS >> configure.log
echo RCOBJS = $RCOBJS >> configure.log
echo STRIP = $STRIP >> configure.log
echo OBJC = $OBJC >> configure.log
echo TESTOBJG = $TESTOBJG >> configure.log
echo PIC_TESTOBJG = $PIC_TESTOBJG >> configure.log
echo PIC_OBJC = $PIC_OBJC >> configure.log
echo RANLIB = $RANLIB >> configure.log
echo SFLAGS = $SFLAGS >> configure.log
echo SHAREDLIB = $SHAREDLIB >> configure.log
echo SHAREDLIBM = $SHAREDLIBM >> configure.log
echo SHAREDLIBV = $SHAREDLIBV >> configure.log
echo SHAREDTARGET = $SHAREDTARGET >> configure.log
echo IMPORTLIB = $IMPORTLIB >> configure.log
echo INSTALLTARGETS = $INSTALLTARGETS >> configure.log
echo UNINSTALLTARGETS = $UNINSTALLTARGETS >> configure.log
echo SRCDIR = $SRCDIR >> configure.log
echo BUILDDIR = $BUILDDIR >> configure.log
echo STATICLIB = $STATICLIB >> configure.log
echo TEST = $TEST >> configure.log
echo VER = $VER >> configure.log
echo exec_prefix = $exec_prefix >> configure.log
echo includedir = $includedir >> configure.log
echo bindir = $bindir >> configure.log
echo libdir = $libdir >> configure.log
echo mandir = $mandir >> configure.log
echo prefix = $prefix >> configure.log
echo symbol_prefix = $symbol_prefix >> configure.log
echo sharedlibdir = $sharedlibdir >> configure.log
echo uname = $uname >> configure.log
echo sse2flag = $sse2flag >> configure.log
echo ssse3flag = $ssse3flag >> configure.log
echo sse42flag = $sse42flag >> configure.log
echo pclmulflag = $pclmulflag >> configure.log
echo vpclmulflag = $vpclmulflag >> configure.log
echo xsaveflag = $xsaveflag >> configure.log
echo acleflag = $acleflag >> configure.log
echo neonflag = $neonflag >> configure.log
echo armv6flag = $armv6flag >> configure.log
echo ARCHDIR = ${ARCHDIR} >> configure.log
echo ARCH_STATIC_OBJS = ${ARCH_STATIC_OBJS} >> configure.log
echo ARCH_SHARED_OBJS = ${ARCH_SHARED_OBJS} >> configure.log

# Handle sed incompatibilities when using -i
replace_in_file() {
  if [ "$OS" = 'Darwin' ]; then
    sed -i '.tmp' -e "$1" "$2"
  else
    sed -i'.tmp' -e "$1" "$2"
  fi
}

# update Makefile with the configure results

INCLUDES="-I$SRCDIR"
if [ "$SRCDIR" != "$BUILDDIR" ]; then INCLUDES="-I$BUILDDIR ${INCLUDES}"; fi

sed < $SRCDIR/Makefile.in "
/^CC *=/s#=.*#=$CC#
/^CFLAGS *=/s#=.*#=$CFLAGS#
/^SFLAGS *=/s#=.*#=$SFLAGS#
/^LDFLAGS *=/s#=.*#=$LDFLAGS#
/^LDSHARED *=/s#=.*#=$LDSHARED#
/^LDSHAREDFLAGS *=/s#=.*#=$LDSHAREDFLAGS#
/^LDVERSIONSCRIPT *=/s#=.*#=$LDVERSIONSCRIPT#
/^LIBNAME1 *=/s#=.*#=$LIBNAME#
/^LIBNAME2 *=/s#=.*#=$LIBNAME2#
/^SUFFIX *=/s#=.*#=$SUFFIX#
/^STATICLIB *=/s#=.*#=$STATICLIB#
/^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
/^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
/^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
/^SHAREDTARGET *=/s#=.*#=$SHAREDTARGET#
/^IMPORTLIB *=/s#=.*#=$IMPORTLIB#
/^VER *=/s#=.*#=$VER#
/^VER1 *=/s#=.*#=$VER1#
/^AR *=/s#=.*#=$AR#
/^ARFLAGS *=/s#=.*#=$ARFLAGS#
/^RANLIB *=/s#=.*#=$RANLIB#
/^LDCONFIG *=/s#=.*#=$LDCONFIG#
/^LDSHAREDLIBC *=/s#=.*#=$LDSHAREDLIBC#
/^DEFFILE *=/s#=.*#=$DEFFILE#
/^RC *=/s#=.*#=$RC#
/^RCFLAGS *=/s#=.*#=$RCFLAGS#
/^RCOBJS *=/s#=.*#=$RCOBJS#
/^STRIP *=/s#=.*#=$STRIP#
/^EXE *=/s#=.*#=$EXE#
/^prefix *=/s#=.*#= $prefix#
/^exec_prefix *=/s#=.*#= $exec_prefix#
/^bindir *=/s#=.*#= $bindir#
/^symbol_prefix *=/s#=.*#= $symbol_prefix#
/^libdir *=/s#=.*#= $libdir#
/^sharedlibdir *=/s#=.*#= $sharedlibdir#
/^includedir *=/s#=.*#= $includedir#
/^mandir *=/s#=.*#= $mandir#
/^SRCDIR *=/s#=.*#=$SRCDIR#
/^INCLUDES *=/s#=.*#=$INCLUDES#
/^OBJC *=/s#=.*#= $OBJC#
/^TESTOBJG *=/s#=.*#= $TESTOBJG#
/^PIC_TESTOBJG *=/s#=.*#= $PIC_TESTOBJG#
/^PIC_OBJC *=/s#=.*#= $PIC_OBJC#
/^all: */s#:.*#: $ALL#
/^install-libs: */s#:.*#: $INSTALLTARGETS#
/^uninstall-libs: */s#:.*#: $UNINSTALLTARGETS#
/^ARCHDIR *=/s#=.*#=$ARCHDIR#
/^ARCH_STATIC_OBJS *=/s#=.*#=$ARCH_STATIC_OBJS#
/^ARCH_SHARED_OBJS *=/s#=.*#=$ARCH_SHARED_OBJS#
" > Makefile

# Append header files dependencies.
for file in $SRCDIR/*.c $SRCDIR/test/*.c $SRCDIR/test/fuzz/*.c $SRCDIR/$ARCHDIR/*.c $SRCDIR/tools/*.c; do
    if test ! -f $file; then
        continue
    fi

    short_name=$(echo $file | sed -e "s#$SRCDIR/##g")
    incs=$(grep -h include $file | sed -n 's/# *\include *"\(.*\.h\)".*/\1/p' | sort | uniq)
    includes=$(for i in $incs; do
                   # Check that the include file exists in the current dir,
                   # otherwise it may be one of the system include header.
                   if test -e $SRCDIR/$i; then
                       printf " \$(SRCDIR)/$i"
                   fi
                   # We also need to check whether the include file is in the ARCHDIR.
                   if test -e $SRCDIR/$ARCHDIR/$i; then
                       printf " \$(SRCDIR)/$ARCHDIR/$i"
                   fi
               done)
    obj=$(basename $(echo $file | sed -e 's/\.c/\.o/g' -e 's#^\./##g'))
    lobj=$(basename $(echo $file | sed -e 's/\.c/\.lo/g' -e 's#^\./##g'))

    if grep -q "^$obj:" Makefile; then
        # Replace the existing line with a line with all dependences.
        $(replace_in_file "s#$obj:.*#$obj: \$(SRCDIR)/$short_name $includes#g" Makefile)
    else
        # Append at the end of Makefile a new line with the header dependences.
        echo "$obj: \$(SRCDIR)/$short_name $includes" >> Makefile

        # In case this is one of the ARCHDIR files, append a dependence line
        # that will force the `$(MAKE) -C $(ARCHDIR)` generic rule. Without this
        # we would only execute the copy rule from ARCHDIR to SRCDIR.
        if test -e $SRCDIR/$ARCHDIR/$(basename $file); then
            echo "$ARCHDIR/$obj: \$(SRCDIR)/$short_name $includes" >> Makefile
        fi
    fi

    if grep -q "^$lobj:" Makefile; then
        # Replace the existing line with a line with all dependences.
        $(replace_in_file "s#$lobj:.*#$lobj: \$(SRCDIR)/$short_name $includes#g" Makefile)
    else
        # Append at the end of Makefile a new line with the header dependences.
        echo "$lobj: \$(SRCDIR)/$short_name $includes" >> Makefile
    fi
done

# Generate Makefile in arch dir
mkdir -p $ARCHDIR

sed < $SRCDIR/$ARCHDIR/Makefile.in "
/^CC *=/s#=.*#=$CC#
/^CFLAGS *=/s#=.*#=$CFLAGS#
/^SFLAGS *=/s#=.*#=$SFLAGS#
/^LDFLAGS *=/s#=.*#=$LDFLAGS#
/^INCLUDES *=/s#=.*#=$INCLUDES#
/^SUFFIX *=/s#=.*#=$SUFFIX#
/^SRCDIR *=/s#=.*#=$SRCDIR/$ARCHDIR#
/^SRCTOP *=/s#=.*#=$SRCDIR#
/^BUILDDIR *=/s#=.*#=$BUILDDIR#
/^AVX2FLAG *=/s#=.*#=$avx2flag#
/^AVX512FLAG *=/s#=.*#=$avx512flag#
/^AVX512VNNIFLAG *=/s#=.*#=$avx512vnniflag#
/^SSE2FLAG *=/s#=.*#=$sse2flag#
/^SSSE3FLAG *=/s#=.*#=$ssse3flag#
/^SSE42FLAG *=/s#=.*#=$sse42flag#
/^PCLMULFLAG *=/s#=.*#=$pclmulflag#
/^VPCLMULFLAG *=/s#=.*#=$vpclmulflag#
/^XSAVEFLAG *=/s#=.*#=$xsaveflag#
/^ACLEFLAG *=/s#=.*#=$acleflag#
/^NEONFLAG *=/s#=.*#=$neonflag#
/^ARMV6FLAG *=/s#=.*#=$armv6flag#
/^NOLTOFLAG *=/s#=.*#=$noltoflag#
/^VGFMAFLAG *=/s#=.*#=$vgfmaflag#
/^PPCFLAGS *=/s#=.*#=$vmxflag#
" > $ARCHDIR/Makefile

# Append header files dependencies.
for file in $SRCDIR/$ARCHDIR/*.c; do
    if test ! -f $file; then
        continue
    fi

    incs=$(grep -h include $file | sed -n 's/# *\include *"\(.*\.h\)".*/\1/p' | sort | uniq)
    includes=$(for i in $incs; do
                   # Check that the include file exists in the current dir,
                   # otherwise it may be one of the system include header.
                   if test -e $SRCDIR/$i; then
                       printf " \$(SRCTOP)/$i"
                   fi
                   # We also need to check whether the include file is in the ARCHDIR.
                   if test -e $SRCDIR/$ARCHDIR/$i; then
                       printf " \$(SRCDIR)/$i"
                   fi
               done)
    obj=$(basename $(echo $file | sed -e 's/\.c/\.o/g' -e 's#^\./##g'))
    lobj=$(basename $(echo $file | sed -e 's/\.c/\.lo/g' -e 's#^\./##g'))
    short_name=$(basename $file)
    if grep -q "^$obj:" $ARCHDIR/Makefile; then
        # Replace the existing line with a line with all dependences.
        $(replace_in_file "s#$obj:.*#$obj: \$(SRCDIR)/$short_name $includes#g" $ARCHDIR/Makefile)
    else
        # Append at the end of Makefile a new line with the header dependences.
        echo "$obj: \$(SRCDIR)/$short_name $includes" >> $ARCHDIR/Makefile
    fi

    if grep -q "^$lobj:" $ARCHDIR/Makefile; then
        # Replace the existing line with a line with all dependences.
        $(replace_in_file "s#$lobj:.*#$lobj: \$(SRCDIR)/$short_name $includes#g" $ARCHDIR/Makefile)
    else
        # Append at the end of Makefile a new line with the header dependences.
        echo "$lobj: \$(SRCDIR)/$short_name $includes" >> $ARCHDIR/Makefile
    fi
done

# Generate Makefile in generic arch dir
mkdir -p arch/generic

sed < $SRCDIR/arch/generic/Makefile.in "
/^CC *=/s#=.*#=$CC#
/^CFLAGS *=/s#=.*#=$CFLAGS#
/^SFLAGS *=/s#=.*#=$SFLAGS#
/^INCLUDES *=/s#=.*#=$INCLUDES#
/^SRCDIR *=/s#=.*#=$SRCDIR/arch/generic#
/^SRCTOP *=/s#=.*#=$SRCDIR#
/^BUILDDIR *=/s#=.*#=$BUILDDIR#
" > arch/generic/Makefile

## TODO: Process header dependencies

# Emscripten does not support large amounts of data via stdin/out
# https://github.com/emscripten-core/emscripten/issues/16755#issuecomment-1102732849
if test "$CHOST" != "wasm32"; then
    TEST="${TEST} ghtests"
fi

# Determine emulator to use when running tests
if test -z "$EMU_RUN" && test $QEMU_ARCH; then
    EMU_RUN="qemu-$QEMU_ARCH -L /usr/${CHOST}/"
fi
if test -n "$EMU_RUN"; then
    echo "Using cross-compile emulator: $EMU_RUN"
fi

if test $gzfileops -eq 1; then
    PC_CFLAGS="-DWITH_GZFILEOP"
fi

# create zlib.pc with the configure results
sed < $SRCDIR/zlib.pc.in "
/^CC *=/s#=.*#=$CC#
/^CFLAGS *=/s#=.*#=$CFLAGS#
/^LDFLAGS *=/s#=.*#=$LDFLAGS#
/^LDSHARED *=/s#=.*#=$LDSHARED#
/^LDSHAREDFLAGS *=/s#=.*#=$LDSHAREDFLAGS#
/^STATICLIB *=/s#=.*#=$STATICLIB#
/^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
/^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
/^SHAREDLIBM *=/s#=.*#=$SHAREDLIBM#
/^IMPORTLIB *=/s#=.*#=$IMPORTLIB#
/^AR *=/s#=.*#=$AR#
/^ARFLAGS *=/s#=.*#=$ARFLAGS#
/^RANLIB *=/s#=.*#=$RANLIB#
/^EXE *=/s#=.*#=$EXE#
/^prefix *=/s#=.*#=$prefix#
/^exec_prefix *=/s#=.*#=$exec_prefix#
/^bindir *=/s#=.*#=$bindir#
/^symbol_prefix *=/s#=.*#=$symbol_prefix#
/^libdir *=/s#=.*#=$libdir#
/^sharedlibdir *=/s#=.*#=$sharedlibdir#
/^includedir *=/s#=.*#=$includedir#
/^mandir *=/s#=.*#=$mandir#
/^LDFLAGS *=/s#=.*#=$LDFLAGS#
" | sed -e "
s/\@VERSION\@/$VER/g;
s/\@SUFFIX\@/$SUFFIX/g;
s/\@PKG_CONFIG_CFLAGS\@/$PC_CFLAGS/g;
" > ${LIBNAME2}.pc

# done
leave 0