#!/bin/sh
# Based on the configure script from musl libc, MIT licensed; vis, ISC licensed

usage () {
    cat <<EOF
Usage: $0 [OPTION]... [VAR=VALUE]...

To assign environment variables (e.g., CC, CFLAGS...), specify them as
VAR=VALUE.  See below for descriptions of some of the useful variables.

Defaults for the options are specified in brackets.

Configuration:
  --config-file=FILE      save config to FILE [config.mk]

Optional configuration:
  --minimal=yes           do not include extra features (default=no)
  --arch=ARCH             use -march=ARCH. Set to 'none' for none, else defaults to 'native'
  --jq-prefix=JQ_PREFIX   specify directory containing lib/libjq and include/jq.h
                          defaults to PREFIX if not specified and PREFIX/include/jq.h exists
  --pcre2-8-prefix=PCRE2_8_PREFIX
                          no=do not use pcre2
                          builtin=build from included source (pcre2-10.47)
                          otherwise, specify dir with lib/libpcre2-8 and include/pcre2-8.h
                          defaults to 'builtin' if not specified
  --no-parallel           disable parallelization in the CLI 'select' command

Installation directories:
  --prefix=PREFIX         main installation prefix [\$PREFIX or /usr/local]
  --exec-prefix=EPREFIX   installation prefix for bin, lib, include [PREFIX]

Fine tuning of the installation directories:
  --sharedir=DIR          share directories [PREFIX/share]
  --docdir=DIR            misc. documentation [PREFIX/share/doc]
  --mandir=DIR            man pages [PREFIX/share/man]

Optional features:
  --try-avx512            use avx512 instructions, if available [no]
  --force-avx2            force compile with (no CPU check) or without -mavx2 [auto]
  --force-avx             force compile with (no CPU check) or without -mavx [auto]
  --force-sse2            force compile with (no CPU check) or without -msse2 [auto]
  --enable-sheet          compile with 'sheet' feature (requires ncurses) [yes]
  --enable-shared         build/install zsv shared library
  --ncurses-dynamic       compile without NCURSES_STATIC
  --enable-lto            compile with LTO (works with some but not all platforms/compilers) [no]
  --enable-whole-program  compile without -fwhole-program even if no -flto [yes]
  --enable-pie            build with position independent executables [auto]
  --enable-pic            build with position independent shared libraries [auto]
  --enable-termcap        build with ncurses / termcap (used by \`pretty\` to get console width) [auto]
  --disable-stdin         disable stdin from CLI commands
  --enable-simdutf        use simdutf for 'check --utf8'. Faster, but adds ~300k to binary
  --disable-only-crlf     disable the --only-crlf parsing option

Some influential environment variables:
  CC                      C compiler command [detected]
  AWK                     AWK tool command [detected]
  MAKE                    gmake tool command [detected]
  AR                      archive command [detected]
  RANLIB                  ranlib archive indexer command [detected]
  CFLAGS                  C compiler flags [-Os -pipe ...]
  LDFLAGS                 Linker flags

  CROSS_COMPILING=no      Set to yes to disable auto-detect compilation flags
  NO_THREADING            Set to 1 to disable threading

Use these variables to override the choices made by configure.

EOF
    exit 0
}

# Helper functions

quote () {
    tr '\n' ' ' <<EOF | grep '^[-[:alnum:]_=,./:]* $' >/dev/null 2>&1 && { echo "$1" ; return 0 ; }
$1
EOF
    printf %s\\n "$1" | sed -e "s/'/'\\\\''/g" -e "1s/^/'/" -e "\$s/\$/'/" -e "s#^'\([-[:alnum:]_,./:]*\)=\(.*\)\$#\1='\2#"
}
echo () { printf "%s\n" "$*" ; }
fail () { echo "$*" ; exit 1 ; }
# shellcheck disable=SC2329
fnmatch () { eval "case \"\$2\" in $1) return 0 ;; *) return 1 ;; esac" ; }
cmdexists () { type "$1" >/dev/null 2>&1 ; }
trycc1 () { test -z "$CC" && cmdexists "$1" && ( "$1" --version | grep -i gcc ) >/dev/null 2>/dev/null && CC=$1 ; }
trycc2 () { test -z "$CC" && cmdexists "$1" && CC=$1 ; }
tryar () { test -z "$AR" && cmdexists "$1" && AR=$1 ; }
tryranlib () { test -z "$RANLIB" && cmdexists "$1" && RANLIB=$1 ; }
tryawk () { test -z "$AWK" && "$1" 'function works () {return 0} BEGIN{exit works()}' && AWK=$1 ; }
trymake() {
    if test -z "$MAKE" && cmdexists "$1" ; then
        v=$($1 --version | grep 'GNU Make' | sed -e 's/.*Make //')
        if [ "$v" = "" ] ; then
            printf "Found but not using non-GNU make (%s)..." "$1"
        else
            MAKE="$1"
            maj=$(echo "$v" | cut -d. -f 1)
            min=$(echo "$v" | cut -d. -f 2)
            if ! test "$maj" -gt 3 -o '(' "$maj" -eq 3 -a "$min" -ge 81 ')'; then
                printf "WARNING: using make, but version %s < 3.81 has not been tested. " "$v"
            fi
        fi
    fi
}

stripdir () {
    while eval "fnmatch '*/' \"\${$1}\"" ; do eval "$1=\${$1%/}" ; done
}

NO_HAVE=
trycchdr () {
    printf "checking whether there is a header called %s... " "$2"
    dn=$(dirname "$2")
    if [ "$dn" != "" ]; then
        dn="/$dn"
        bn=$(basename "$2")
        for x in $CCSEARCHPATH ; do
            fnd=$fnd"$x$dn "
        done
    else
        bn="$2"
        fnd=$CCSEARCHPATH
    fi
    upper2=$(echo "$2" | tr '[:lower:]' '[:upper:]' | tr . _ | tr / _)
    if find "$fnd" -name "$bn" 2>/dev/null | grep "/$2$" >/dev/null 2>&1 ; then
        eval "$1=\"\${$1} -DHAVE_\${upper2}\""
        eval "$1=\${$1# }"
        printf "yes\n"
        return 0
    else
        printf "no\n"
        NO_HAVE="$NO_HAVE
NO_$upper2 = 1"
        return 1
    fi
}

trycpusupport() {
    rm -f "$tmpc"
    printf "checking whether CPU accepts %s... " "$1"
    cat >> "$tmpc" <<EOF
int main() {
  if(__builtin_cpu_supports("$1"))
    return 0;
  return 1;
}
EOF
    $CC -o "$tmpe" "$tmpc" >/dev/null 2>&1 && "$tmpe" && echo "yes" && return 0;
    echo "no"
    return 1;
}

tryccfn () {
    rm -f "$tmpc"
    if [ "$5" != "" ] ; then
        printf "checking whether compiler accepts %s from %s with %s... " "$2" "$3" "$5"
        echo "$5" >> "$tmpc"
    else
        printf "checking whether compiler accepts %s from %s..." "$2" "$3"
    fi
    if [ "$3" != "" ]; then
        printf "%s\n" "$3" | sed 's/\(.*\)/#include <\1>/' >> "$tmpc"
    fi
    cat >> "$tmpc" <<EOF
int main() {$2;}
EOF
    flag=$(echo "$2" | cut -d'(' -f1 | tr '[:lower:]' '[:upper:]')
    if $CC -o "$tmpo" "$tmpc" >/dev/null 2>&1 ; then
        if [ "$4" != "" ] ; then
            lib=$(echo "$4" | tr '[:lower:]' '[:upper:]' | tr . _)
            USE_LIBS="$USE_LIBS
USE_LIB_$lib = 1"
        fi

        eval "vars=\$$1"
        # shellcheck disable=SC2154
        if ! printf "%s\n" "${vars}" | grep "\-DHAVE_${flag}\$" >/dev/null 2>&1; then
            flag="-DHAVE_${flag}"
            eval "$1=\"\${vars} \${flag}\""
            eval "$1=\${$1# }"
        fi
        printf "yes\n"
        return 0
    else
        printf "no\n"
        NO_HAVE="$NO_HAVE
NO_$flag = 1"
        {
            echo "------"
            echo "Failed: $CC -o $tmpo tmp.c"
            cat "$tmpc"
            echo "------"
        } >>"$CONFIGFILE".log
        return 1
    fi
}

tryccfn1 () {
    rm -f "$tmpc"
    printf "checking whether compiler accepts %s(%s)..." "$2" "$3"
    cat >> "$tmpc" <<EOF
int main() {$2($3);}
EOF
    flag=$(echo "$2" | cut -d'(' -f1 | tr '[:lower:]' '[:upper:]')
    if $CC -o "$tmpo" "$tmpc" >/dev/null 2>&1 ; then
        flag="-DHAVE_${flag}"
        have=1
    else
        flag="-DNO_${flag}"
        have=0
    fi
    eval "vars=\$$1"
    if ! printf "%s\n" "${vars}" | grep "\-D${flag}\$" >/dev/null 2>&1; then
        eval "$1=\"\${vars} \${flag}\""
        eval "$1=\${$1# }"
    fi
    if [ "$have" = "1" ]; then
        printf "yes\n"
        return 0
    else
        printf "no\n"
        return 1
    fi
}

tryflag () {
    printf "checking whether compiler accepts %s... " "$2"
    echo "int main() {return 0;}" > "$tmpc"
    # shellcheck disable=SC2086
    if $CC $CFLAGS_TRY $2 -c -o "$tmpo" "$tmpc" >/dev/null 2>&1 ; then
        printf "yes\n"
        eval "$1=\"\${$1} \$2\""
        eval "$1=\${$1# }"
        return 0
    else
        printf "no\n"
        return 1
    fi
}

tryldflag () { # var, flag, other_arguments (optional)
    printf "checking whether linker accepts %s %s... " "$2" "$3"
    echo "int main(){return 0;}" > "$tmpc"
    # shellcheck disable=SC2086
    if $CC $LDFLAGS "$2" $3 -o "$tmpo" "$tmpc" >/dev/null 2>&1 ; then
        printf "yes\n"
        eval "$1=\"\${$1} \$2\""
        eval "$1=\${$1# }"
        return 0
    else
        printf "no\n"
        return 1
    fi
}

trysharedldflag () {
    printf "checking whether linker accepts %s... " "$2"
    echo "typedef int x;" > "$tmpc"
    # shellcheck disable=SC2086
    if $CC $LDFLAGS -shared "$2" -o "$tmpo" "$tmpc" >/dev/null 2>&1 ; then
        printf "yes\n"
        eval "$1=\"\${$1} \$2\""
        eval "$1=\${$1# }"
        return 0
    else
        printf "no\n"
        return 1
    fi
}

# Beginning of actual script
if [ "$CROSS_COMPILING" = "" ]; then
    CROSS_COMPILING=no
fi

CFLAGS_AUTO=
CFLAGS_TRY=
LDFLAGS_AUTO=

# shellcheck disable=SC2034
LDFLAGS_TRY=

# CONFIGFILE=$CONFIGFILE
if [ "$CONFIGFILE" = "" ]; then
    CONFIGFILE=config.mk
fi

if [ "$ARCH" = "" ] ; then
    if [ "$CROSS_COMPILING" = "no" ]; then
        ARCH=native
    else
        ARCH=none
    fi
fi

# check prefixes first, since others may be derived from it unless overridden
# PREFIX=$PREFIX
for arg ; do
    case "$arg" in
        --prefix=*) PREFIX=${arg#*=} ;;
    esac
done
if [ "$PREFIX" = "" ]; then
    PREFIX=/usr/local
elif [ "$PREFIX" = "${PREFIX#/}" ]; then
    PREFIX="$PWD/$PREFIX"
fi

# EXEC_PREFIX=$EXEC_PREFIX
for arg ; do
    case "$arg" in
        --exec-prefix=*) EXEC_PREFIX=${arg#*=} ;;
    esac
done
if [ "$EXEC_PREFIX" = "" ]; then
    EXEC_PREFIX=$PREFIX
elif [ "$EXEC_PREFIX" = "${EXEC_PREFIX#/}" ]; then
    EXEC_PREFIX="$PWD/$EXEC_PREFIX"
fi

DOCDIR="$PREFIX/share/doc"
MANDIR="$PREFIX/share/man"

MINIMAL=no

TRY_SHEET=auto
BUILD_SHAREDLIB=0
TRY_LTO=no
TRY_WHOLE_PROGRAM=auto
FORCE_AVX2=auto
FORCE_AVX=auto
FORCE_SSE2=auto

NO_STDIN=

usepie=auto
usepic=auto
usetermcap=auto

ZSV_NO_PARALLEL=
NCURSES_DYNAMIC=
for arg ; do
    case "$arg" in
        --help|-h) usage ;;
        --host=*) host=${arg#*=} ;;

        --arch=*) ARCH=${arg#*=} ;;
        ARCH=*) ARCH=${arg#*=} ;;

        --config-file=*) CONFIGFILE=${arg#*=} ;;
        CONFIGFILE=*) CONFIGFILE=${arg#*=} ;;

        --jq-prefix=*) JQ_PREFIX=${arg#*=} ;;
        JQ_PREFIX=*) JQ_PREFIX=${arg#*=} ;;

        --pcre2-8-prefix=*) PCRE2_8_PREFIX=${arg#*=} ;;
        PCRE2_8_PREFIX=*) PCRE2_8_PREFIX=${arg#*=} ;;

        --prefix=*) ;; # already handled
        --exec-prefix=*) ;; # already handled EXEC_PREFIX=${arg#*=} ;;
        --docdir=*) DOCDIR=${arg#*=} ;;
        --mandir=*) MANDIR=${arg#*=} ;;
        --minimal|--minimal=yes) MINIMAL=yes;;

        --no-parallel) ZSV_NO_PARALLEL=1;;

        --try-avx512|--try-avx512=yes) TRY_AVX512=yes;;
        --try-avx512=no) TRY_AVX512=no;;

        --force-avx2|--force-avx2=yes) FORCE_AVX2=yes;;
        --force-avx2=no) FORCE_AVX2=no;;

        --force-avx|--force-avx=yes) FORCE_AVX=yes;;
        --force-avx=no) FORCE_AVX=no;;

        --force-sse2|--force-sse2=yes) FORCE_SSE2=yes;;
        --force-sse2=no) FORCE_SSE2=no;;

        --ncurses-dynamic) NCURSES_DYNAMIC=1;;

        --enable-sheet|--enable-sheet=yes) TRY_SHEET=yes;;
        --enable-sheet=auto) TRY_SHEET=auto;;
        --disable-sheet|--enable-sheet=no) TRY_SHEET=no;;

        --enable-simdutf|--enable-simdutf=yes) USE_SIMDUTF=1;;
        --enable-simdutf=auto) USE_SIMDUTF=0;;
        --disable-simdutf|--enable-simdutf=no) USE_SIMDUTF=0;;

        --enable-only-crlf|--enable-only-crlf=yes) ZSV_NO_ONLY_CRLF=0;;
        --enable-only-crlf=auto) ZSV_NO_ONLY_CRLF=0;;
        --disable-only-crlf|--enable-only-crlf=no) ZSV_NO_ONLY_CRLF=1;;

        --enable-shared|--enable-shared=yes) BUILD_SHAREDLIB=1;;
        --disable-shared|--enable-shared=no) BUILD_SHAREDLIB=0;;

        --enable-lto|--enable-lto=yes) TRY_LTO=yes;;
        --enable-lto=auto) TRY_LTO=auto;;
        --disable-lto|--enable-lto=no) TRY_LTO=no;;

        --enable-whole-program|--enable-whole-program=yes) TRY_WHOLE_PROGRAM=yes ;;
        --disable-whole-program|--enable-whole-program=no) TRY_WHOLE_PROGRAM=no ;;

        --enable-pie|--enable-pie=yes) usepie=yes ;;
        --enable-pie=auto) usepie=auto ;;
        --disable-pie|--enable-pie=no) usepie=no ;;

        --enable-pic|enable-pic=yes) usepic=yes ;;
        --enable-termcap|--enable-termcap=yes) usetermcap=yes ;;
        --enable-termcap=auto) usetermcap=auto ;;
        --disable-termcap|--enable-termcap=no) usetermcap=no ;;

        --disable-stdin|--enable-stdin=no) NO_STDIN=1 ;;

        --enable-pic=auto) usepic=auto ;;
        --disable-pic|--enable-pic=no) usepic=no ;;
        --enable-*|--disable-*|--with-*|--without-*|--*dir=*|--build=*) ;;
        -* ) echo "$0: unknown option $arg" ;;
        CC=*) CC=${arg#*=} ;;
        CFLAGS=*) CFLAGS=${arg#*=} ;;
        CPPFLAGS=*) CPPFLAGS=${arg#*=} ;;
        LDFLAGS=*) LDFLAGS=${arg#*=} ;;
        *=*) ;;
        *) ;;
    esac
done

echo "config will be saved to $CONFIGFILE"

for i in PREFIX EXEC_PREFIX DOCDIR MANDIR ; do
    stripdir $i
done

#
# Get a temp filename we can use
#
i=0
set -C
while : ; do
    i=$((i+1))
    tmpc="./conf$$-$PPID-$i.c"
    tmpo="./conf$$-$PPID-$i.o"
    tmpe="./conf$$-$PPID-$i._"
    # shellcheck disable=SC2188
    2>|/dev/null > "$tmpc" && break
    test "$i" -gt 50 && fail "$0: cannot create temporary file $tmpc"
done
set +C
trap 'rm -f "$tmpc" "$tmpo" "$tmpe"' EXIT QUIT TERM HUP
trap 'rm -f "$tmpc" "$tmpo" "$tmpe" && echo && fail "$0: interrupted"' INT

#
# Find an AWK tool to use
#
printf "checking for AWK tool... "
for a in awk gawk mawk nawk; do tryawk "$a"; done
printf "%s\n" "$AWK"
test -n "$AWK" || fail "$0: cannot find an AWK tool"

#
# Find a MAKE tool to use
#
printf "checking for MAKE tool... "
for a in make gmake ; do trymake "$a"; done
printf "%s\n" "$MAKE"
test -n "$MAKE" || fail "$0: cannot find a MAKE tool"

#
# Find a C compiler to use
#
printf "checking for C compiler... "
for c in cc gcc gcc-14 gcc-13 gcc-12 gcc-11 gcc-10 gcc-9 gcc-8 gcc-7 clang; do trycc1 "$c"; done
for c in cc gcc gcc-14 gcc-13 gcc-12 gcc-11 gcc-10 gcc-9 gcc-8 gcc-7 clang; do trycc2 "$c"; done
printf "%s\n" "$CC"
test -n "$CC" || fail "$0: cannot find a C compiler"

printf "checking whether C compiler works... "
echo "typedef int x;" > "$tmpc"
# shellcheck disable=SC2086
if output=$($CC $CPPFLAGS $CFLAGS -c -o "$tmpo" "$tmpc" 2>&1) ; then
    printf "yes\n"
else
    fail "no; compiler output follows:\n%s\n" "$output"
fi

#
# Get compiler search paths
#
# shellcheck disable=SC2016
CCSEARCHPATH=$(echo | ${CC} -E -Wp,-v - 2>&1 | ${AWK} '/ \//{print substr($0,2);}')

#
# Check if it is clang, and the llvm tools instead
#
# shellcheck disable=SC2016
compiler=$(${CC} -v 2>&1 | ${AWK} '/ +version +/{for(i=1;i<=NF;i++){if($i=="version"){printf("%s\n",(last=="LLVM")?"clang":last);exit 0;}last=$i;}}')
if test "$compiler" = "clang"; then
    arlist="$CC-llvm-ar $host-llvm-ar $CC-ar $host-ar llvm-ar $(ls /usr/bin/llvm-ar* 2>/dev/null) ar"
    ranliblist="$CC-llvm-ranlib $host-llvm-ranlib $CC-ranlib $host-ranlib llvm-ranlib $(ls /usr/bin/llvm-ranlib* 2>/dev/null) ranlib"
else
    arlist="$CC-ar $host-$compiler-ar $host-ar $compiler-ar ar"
    ranliblist="$CC-ranlib $host-$compiler-ranlib $host-ranlib $compiler-ranlib $compiler-ranlib ranlib"
fi

#
# Find ar and ranlib to use
#
printf "checking for ar... "
for a in $arlist; do tryar "$a"; done
printf "%s\n" "$AR"
test -n "$AR" || fail "$0: cannot find ar"

printf "checking for ranlib... "
for r in $ranliblist ; do tryranlib "$r"; done
printf "%s\n" "$RANLIB"
test -n "$RANLIB" || fail "$0: cannot find ranlib"

#
# Detect the host system
#
printf 'checking host system type... '
test -n "$host" || host=$($CC -dumpmachine 2>/dev/null) || fail "could not determine host"
printf '%s\n' "$host"

# start the log
cat >"$CONFIGFILE".log <<_ACEOF
Config log. Invocation command line was
  $ $0 $@

_ACEOF

#
# Figure out options to force errors on unknown flags.
#
tryflag   CFLAGS_TRY  -Werror=unknown-warning-option
tryflag   CFLAGS_TRY  -Werror=unused-command-line-argument
tryflag   CFLAGS_TRY  -Werror=ignored-optimization-argument
tryldflag LDFLAGS_STATIC -static
tryldflag LDFLAGS_TRY -Werror=unknown-warning-option
tryldflag LDFLAGS_TRY -Werror=unused-command-line-argument
tryldflag LDFLAGS_TRY -Werror=ignored-optimization-argument

CFLAGS_STD="-std=gnu11 -D_POSIX_C_SOURCE=200809L -U_XOPEN_SOURCE -D_XOPEN_SOURCE=700"
MINGW=0
case "$host" in
    *-*freebsd*) CFLAGS_STD="$CFLAGS_STD -D_BSD_SOURCE -D__BSD_VISIBLE=1" ;;
    *-*netbsd*) CFLAGS_STD="$CFLAGS_STD -D_NETBSD_SOURCE" ;;
    *-*bsd*) CFLAGS_STD="$CFLAGS_STD -D_BSD_SOURCE" ;;
    *-*darwin*) CFLAGS_STD="$CFLAGS_STD -D_DARWIN_C_SOURCE" ;;
    *-*mingw32|*-*msys*|*-windows-gnu)
    CFLAGS_STD="$CFLAGS_STD -D__USE_MINGW_ANSI_STDIO"
    MINGW=1
    ARCH=none
    usepie=no
    usepic=no
    ;;
esac

if test "$usepie" = "auto" ; then
    usepie=yes
fi

if test "$usepic" = "auto" ; then
    usepic=yes
fi

tryflag CFLAGS_VECTORIZE -fvectorize
tryflag CFLAGS_VECTORIZE -ftree-vectorize
tryflag CFLAGS_VECTORIZE_OPTIMIZED -fopt-info-vec-optimized
tryflag CFLAGS_VECTORIZE_MISSED -fopt-info-vec-missed
tryflag CFLAGS_VECTORIZE_ALL -fopt-info-vec-all
tryflag CFLAGS_OPENMP -fopenmp

if [ "$TRY_SHEET" != "no" ]; then
    if tryldflag LDFLAGS_NCURSESW -lncursesw -L"$PREFIX"/lib ; then
        LDFLAGS_NCURSES=-lncursesw
        NCLIB=ncursesw
        if [ "$NCURSES_DYNAMIC" = "" ] ; then
            CFLAGS_NCURSES="-DHAVE_NCURSESW -DNCURSES_STATIC"
        else
            CFLAGS_NCURSES="-DHAVE_NCURSESW"
        fi
    fi
    if tryldflag LDFLAGS_NCURSES -lncurses -L"$PREFIX"/lib ; then
        NCLIB=ncurses
        if [ "$NCURSES_DYNAMIC" = "" ] ; then
            CFLAGS_NCURSES="$CFLAGS_NCURSES -DHAVE_NCURSES -DNCURSES_STATIC"
        else
            CFLAGS_NCURSES="$CFLAGS_NCURSES -DHAVE_NCURSES"
        fi
    fi
    ZSVSHEET_BUILD=1

    if [ "$TRY_SHEET" = "yes" ] ; then
        echo "Error: could not find either ncurses or ncursesw library; cannot build 'sheet' feature"
        exit 1
    fi
    if [ "$LDFLAGS_NCURSES" = "" ] ; then
        echo "WARNING: could not find either ncurses or ncursesw library; cannot build 'sheet' feature"
        ZSVSHEET_BUILD=0
    fi
fi

if test "$usepie" = "yes" ; then
    tryflag CFLAGS_PIE -fpie || tryflag CFLAGS_PIE -fPIE
fi

if test "$usepic" = "yes" ; then
    tryflag CFLAGS_PIC -fpic || tryflag CFLAGS_PIC -fPIC
fi

test "$usepie" = "yes" && tryldflag LDFLAGS_PIE -pie

if test "$usepic" = "yes" ; then
    trysharedldflag LDFLAGS_PIC -fpic || trysharedldflag LDFLAGS_PIC -fPIC
fi

test "$usepie" = "no" && tryflag CFLAGS_PIE -fno-pie
test "$usepic" = "no" && tryflag CFLAGS_PIC -fno-pic
test "$usepie" = "no" && tryldflag LDFLAGS_PIE -no-pie
test "$usepic" = "no" && trysharedldflag LDFLAGS_PIC -fno-pic

tryflag CFLAGS -pipe

# Try flags to optimize speed
tryflag CFLAGS -ffunction-sections
tryflag CFLAGS -fdata-sections

CFLAGS_AVX=
if [ "$FORCE_AVX2" = "no" ]; then
    tryflag CFLAGS -mno-avx2
elif [ "$FORCE_AVX2" = "yes" ] ; then
    CFLAGS_AVX=-mavx2
    if [ "$CROSS_COMPILING" = "no" ] ; then
        trycpusupport avx2 || echo "WARNING: avx2 forced but not supported on native CPU"
    fi
elif [ "$FORCE_AVX2" = "auto" ] && [ "$CROSS_COMPILING" = "no" ] ; then
    trycpusupport avx2 && CFLAGS_AVX=-mavx2
fi

if [ "$FORCE_AVX" = "no" ]; then
    tryflag CFLAGS -mno-avx
elif [ "$FORCE_AVX" = "yes" ] ; then
    CFLAGS_AVX=-mavx || echo "WARNING: avx forced but not supported on native CPU"
elif [ "$FORCE_AVX" = "auto" ] && [ "$CFLAGS_AVX" = "" ] && [ "$CROSS_COMPILING" = "no" ] ; then
    trycpusupport avx && CFLAGS_AVX=-mavx
fi

if [ "$FORCE_SSE2" = "no" ]; then
    tryflag CFLAGS -mno-sse2
elif [ "$FORCE_SSE2" = "yes" ] ; then
    CFLAGS_SSE=-msse2
    if "$CC" --version | grep -i emcc >/dev/null; then
        CFLAGS_SSE="$CFLAGS_SSE -msimd128 -experimental-wasm-simd"
    fi
    if [ "$CROSS_COMPILING" = "no" ] ; then
        trycpusupport sse2 || echo "WARNING: sse2 forced but not supported on native CPU"
    fi
elif [ "$FORCE_SSE2" = "auto" ] && [ "$CROSS_COMPILING" = "no" ] ; then
    if [ "$CFLAGS_SSE" = "" ] && [ "$CROSS_COMPILING" = "no" ] ; then
        if trycpusupport sse2 && tryflag CFLAGS_SSE -msse2 ; then
            if "$CC" --version | grep -i emcc >/dev/null; then
               CFLAGS_SSE="$CFLAGS_SSE -msimd128 -experimental-wasm-simd"
            fi
        fi
    fi
fi

HAVE_LTO=0
if [ "$TRY_LTO" = "yes" ]; then
    HAVE_LTO=1
    CFLAGS_LTO="$CFLAGS_LTO -flto"
elif [ "$TRY_LTO" = "auto" ]; then
    tryflag CFLAGS_LTO -flto && HAVE_LTO=1
fi

if [ "$TRY_WHOLE_PROGRAM" = "yes" ] ; then
    if [ "$HAVE_LTO" = "0" ] ; then
        LDFLAGS_OPT="$LDFLAGS_OPT -fwhole-program"
    else
        echo "Error: whole-program and lto are mutually exclusive; disable one or set both to auto"
        exit 1
    fi
elif [ "$TRY_WHOLE_PROGRAM" = "auto" ] ; then
    if [ "$HAVE_LTO" = "0" ] ; then
        tryldflag LDFLAGS_OPT -fwhole-program
    else
        echo "Have LTO, not trying -fwhole-program"
    fi
fi

tryflag CFLAGS_VISIBILITY_HIDDEN -fvisibility=hidden
tryldflag LDFLAGS_AUTO -Wl,--gc-sections

if [ "$ARCH" != "none" ] ; then
    if ! tryflag CFLAGS -march="$ARCH" ; then
        echo "Flag -march=$ARCH failed!"
        exit 1
    fi
fi
tryldflag LDFLAGS_OPT -ldl

# Try hardening flags
if test "$usepie" = "yes" ; then
    case "$LDFLAGS_PIE" in
        *pie*)
        tryldflag LDFLAGS_PIE -Wl,-z,now
        tryldflag LDFLAGS_PIE -Wl,-z,relro
        ;;
    esac
fi
if test "$usepic" = "yes" ; then
    case "$LDFLAGS_PIC" in
        *pic*)
        tryldflag LDFLAGS_PIC -Wl,-z,now
        tryldflag LDFLAGS_PIC -Wl,-z,relro
        ;;
    esac
fi

# Check function availability
if [ "$TRY_AVX512" = "yes" ]; then
    printf "checking whether avx512 instructions are available... "
    HAVE_AVX512=
    tryccfn CFLAGS_AVX_512 "_mm512_movepi8_mask" "immintrin.h" && \
        trycchdr CFLAGS_AVX_512 "immintrin.h" && \
        ( tryccfn CFLAGS_AVX_512 "_blsr_u64" "immintrin.h" || tryccfn CFLAGS_AVX_512 "__blsr_u64" "immintrin.h" ) && \
        tryflag CFLAGS_AVX_512 "-mbmi" && \
        tryflag CFLAGS_AVX_512 "-mavx512bw" && \
        CFLAGS_AVX_512="-mbmi -mavx512bw -DHAVE_AVX512=1" && \
        HAVE_AVX512=1
    if [ "$HAVE_AVX512" = "1" ]; then
        echo "yes"
    else
        echo "no"
        echo "WARNING: --try-avx512 option enabled, but no avx512 instruction set available"
    fi
fi

tryccfn CFLAGS_AUTO "memmem" "string.h"

if [ "$usetermcap" = "yes" ] || [ "$usetermcap" = "auto" ] ; then
    # shellcheck disable=SC2015
    tryccfn TERMCAP_H "tgetent" "termcap.h" && \
        tryldflag LDFLAGS_TERMCAP -ltermcap && \
        tryccfn CFLAGS_AUTO "tgetent" "termcap.h" termcap || \
            if test "$usetermcap" = "yes"; then
                echo "Error: --enable-termcap specified, but not found"
                exit 1
            fi
fi

if [ "$JQ_PREFIX" = "" ] && [ "$PREFIX" != "" ] && [ -f "$PREFIX/include/jq.h" ] ; then
    JQ_PREFIX="$PREFIX"
fi

if [ "$JQ_PREFIX" != "" ] && [ "$CROSS_COMPILING" = "no" ] ; then
    printf '%s' "checking --jq-prefix ${JQ_PREFIX} ... "
    if ! tryldflag LDFLAGS_JQ -ljq -L"$JQ_PREFIX"/lib ; then
        echo "Error: Failed to compile with -ljq and -L$JQ_PREFIX/lib"
        exit 1
    elif [ "$JQ_PREFIX" != "$PREFIX" ]; then
        LDFLAGS_JQ="$LDFLAGS_JQ -L$JQ_PREFIX/lib"
    fi
fi

tryldflag LDFLAGS_JQ -lm
tryldflag LDFLAGS_JQ -lshlwapi
if [ "$NO_THREADING" != "1" ]; then
    if [ "$MINGW" = "1" ]; then
        tryldflag LDFLAGS_TMP -pthread && STATIC_LIBS="$STATIC_LIBS -pthread"
    else
        tryldflag LDFLAGS_JQ -pthread
    fi
fi

HAVE_PCRE2_8=
if [ "$PCRE2_8_PREFIX" = "" ] ; then
    PCRE2_8_PREFIX=builtin
fi
if [ "$PCRE2_8_PREFIX" = "builtin" ] ; then
    HAVE_PCRE2_8=1
else
    if [ "$PCRE2_8_PREFIX" = "" ] && [ "$PREFIX" != "" ] && [ -f "$PREFIX/include/pcre2.h" ] ; then
        PCRE2_8_PREFIX="$PREFIX"
    fi

    if [ "$PCRE2_8_PREFIX" != "no " ] ; then
        if [ "$PCRE2_8_PREFIX" != "" ] && [ "$CROSS_COMPILING" = "no" ] ; then
            # TO DO: check for pcre2 static lib
            printf "%s" "checking --pcre2-8-prefix ${PCRE2_8_PREFIX} ... "
            if ! tryldflag LDFLAGS_PCRE2_8 -lpcre2-8 -L"$PCRE2_8_PREFIX"/lib ; then
                echo "Error: Failed to compile with -lpcre2-8 and -L$PCRE2_8_PREFIX/lib"
            else
                HAVE_PCRE2_8=1
            fi
        fi
    fi
fi

tryccfn CFLAGS_AUTO "arc4random_uniform" "stdlib.h" || tryccfn CFLAGS_AUTO "rand_s" "stdlib.h" "" "#define _CRT_RAND_S"
tryccfn1 CFLAGS_AUTO "__builtin_expect" "0,0"
tryccfn1 CFLAGS_AUTO "__builtin_expect_with_probability" "0,0,0.5"

# Optional features
# shellcheck disable=SC2154
if test "$usedebugstderr" = "yes" ; then
    USE_DEBUG_STDERR=1
else
    USE_DEBUG_STDERR=0
fi

ZSV_EXTRAS=
if test "$MINIMAL" = "no" ; then
    ZSV_EXTRAS=1
fi

printf "creating %s... " "$CONFIGFILE"

cmdline=$(quote "$0")
for i ; do cmdline="$cmdline $(quote "$i")" ; done

exec 3>&1 1> "$CONFIGFILE"

cat << EOF
# This version of $CONFIGFILE was generated by:
# $cmdline
# Any changes made here will be lost if configure is re-run
PREFIX = $PREFIX
EXEC_PREFIX = $EXEC_PREFIX
BINDIR = $EXEC_PREFIX/bin
LIBDIR = $EXEC_PREFIX/lib
INCLUDEDIR = $EXEC_PREFIX/include

DOCPREFIX = $DOCDIR
MANPREFIX = $MANDIR
CC = $CC
AWK = $AWK
MAKE = $MAKE

AR = $AR
RANLIB = $RANLIB
CFLAGS = $CFLAGS
LDFLAGS = $LDFLAGS
CFLAGS_STD = $CFLAGS_STD
LDFLAGS_STD = $LDFLAGS_STD
CFLAGS_VISIBILITY_HIDDEN = $CFLAGS_VISIBILITY_HIDDEN
LDFLAGS_OPT = $LDFLAGS_OPT
LDFLAGS_TERMCAP = $LDFLAGS_TERMCAP
JQ_PREFIX = $JQ_PREFIX
LDFLAGS_JQ = $LDFLAGS_JQ

HAVE_PCRE2_8 = $HAVE_PCRE2_8
PCRE2_8_PREFIX = $PCRE2_8_PREFIX

STATIC_LIBS = $STATIC_LIBS
CFLAGS_AUTO = $CFLAGS_AUTO
CFLAGS_LTO = $CFLAGS_LTO
LDFLAGS_AUTO = $LDFLAGS_AUTO

HAVE_AVX512 = $HAVE_AVX512

CFLAGS_AVX_512 = $CFLAGS_AVX_512
CFLAGS_AVX = $CFLAGS_AVX
CFLAGS_SSE = $CFLAGS_SSE

CFLAGS_DEBUG = -U_FORTIFY_SOURCE -UNDEBUG -O0 -g -Wall -Wextra -Wno-missing-field-initializers -Wunused # -g3 -ggdb
LDFLAGS_DEBUG = -U_FORTIFY_SOURCE -UNDEBUG -O0 -g # -g3 -ggdb
CFLAGS_PIC = $CFLAGS_PIC
LDFLAGS_PIC = $LDFLAGS_PIC
CFLAGS_PIE = $CFLAGS_PIE
LDFLAGS_PIE = $LDFLAGS_PIE
LDFLAGS_STATIC = $LDFLAGS_STATIC
USE_DEBUG_STDERR = $USE_DEBUG_STDERR
CFLAGS_VECTORIZE = $CFLAGS_VECTORIZE
CFLAGS_VECTORIZE_OPTIMIZED = $CFLAGS_VECTORIZE_OPTIMIZED
CFLAGS_VECTORIZE_MISSED = $CFLAGS_VECTORIZE_MISSED
CFLAGS_VECTORIZE_ALL = $CFLAGS_VECTORIZE_ALL
CFLAGS_OPENMP = $CFLAGS_OPENMP

LDFLAGS_NCURSES = $LDFLAGS_NCURSES
CFLAGS_NCURSES = $CFLAGS_NCURSES

ZSV_EXTRAS = $ZSV_EXTRAS

BUILD_SHAREDLIB = $BUILD_SHAREDLIB

ZSVSHEET_BUILD = $ZSVSHEET_BUILD

ZSV_NO_PARALLEL = $ZSV_NO_PARALLEL

NO_STDIN = $NO_STDIN

USE_SIMDUTF = $USE_SIMDUTF

ZSV_NO_ONLY_CRLF = $ZSV_NO_ONLY_CRLF

$NO_HAVE
$USE_LIBS

EOF
exec 1>&3 3>&-

printf "done\n"

echo ""
echo "*****************************************************************"
echo "*  zsv build configuration                                      *"
echo "*****************************************************************"

if [ "$JQ_PREFIX" != "" ]; then
    printf '%-64s*\n' "*  - jq-prefix: $JQ_PREFIX"
fi

if [ "$PCRE2_8_PREFIX" != "" ] && [ "$HAVE_PCRE2_8" = "1" ]; then
    printf '%-64s*\n' "*  - pcre2-8-prefix: $PCRE2_8_PREFIX"
else
    printf '%-64s*\n' "*  - pcre2-8 -> NOT FOUND"
    printf '%-64s*\n' "       select and sheet regex features will not be built"
fi

if [ "$LDFLAGS_TERMCAP" = "" ]; then
    printf '%-64s*\n' "*  - termcap: no. \`pretty\` will use default width assumption"
else
    printf '%-64s*\n' "*  - termcap: yes"
fi

if [ "$BUILD_SHAREDLIB" = "1" ]; then
    printf '%-64s*\n' "*  - build shared library: yes"
else
    printf '%-64s*\n' "*  - build shared library: no"
fi

if [ "$ZSVSHEET_BUILD" = "1" ]; then
    printf '%-64s*\n' "*  - build sheet feature: yes"
    if [ "$NCLIB" = "ncurses" ]; then
        printf '%-64s*\n' "*    ncurses library:     ncurses"
    elif [ "$NCLIB" = "ncursesw" ]; then
        printf '%-64s*\n' "*    ncurses library:     ncursesw"
    fi
else
    printf '%-64s*\n' "*  - build sheet feature: no"
fi

if [ "$HAVE_AVX512" = "1" ]; then
    printf '%-64s*\n' "*  - using 512-bit AVX instruction set"
elif [ "$CFLAGS_AVX" = "-mavx2" ]; then
    printf '%-64s*\n' "*  - using 256-bit AVX2 instruction set"
elif [ "$CFLAGS_AVX" = "-mavx" ]; then
    printf '%-64s*\n' "*  - using 128-bit + AVX instruction set"
else
    printf '%-64s*\n' "*  - using 128-bit vector size, no AVX"
fi

if [ "$ZSV_NO_PARALLEL" = "1" ]; then
    printf '%-64s*\n' "*  - CLI parallelization: DISABLED"
else
    printf '%-64s*\n' "*  - CLI parallelization: enabled"
fi

if [ "$USE_SIMDUTF" = "1" ]; then
    printf '%-64s*\n' "*  - CLI check utf8: using simdutf"
else
    printf '%-64s*\n' "*  - CLI check utf8: not using simdutf"
fi

if [ "$ZSV_NO_ONLY_CRLF" = "1" ]; then
    printf '%-64s*\n' "*  - only-crlf mode: DISABLED"
else
    printf '%-64s*\n' "*  - only-crlf mode: enabled"
fi


echo "*****************************************************************"

if ! [ "$MAKE" = "" ]; then
    echo
    echo "To build and install, run"
    {
        echo "#!/bin/sh"
        echo "$MAKE install"
    } >"$PWD"/install.sh 2>/dev/null
    chmod 755 "$PWD"/install.sh 2>/dev/null
    echo "  ./install.sh"
    echo "or"
    echo "  $MAKE install"
    echo
    echo "Other common commands:"
    echo "  $MAKE                     # print available make commands"
    echo "  (cd src && $MAKE install) # install library"
    echo "  (cd app && $MAKE install) # install library and zsv CLI"
    echo "  $MAKE uninstall           # uninstall library and zsv CLI"
    echo "  $MAKE clean               # remove build artifacts"
    echo
fi

if ! "$CC" --version | grep -i gcc >/dev/null && ! "$CC" --version | grep -i clang >/dev/null ; then
    echo "*********************** WARNING!! ***********************"
    echo "* Non-gcc/clang compiler untested; use at your own risk *"
    echo "* consider using gcc or clang instead e.g.:             *"
    echo "*       ./configure CC=gcc-11                           *"
    echo "*********************************************************"
    echo ""
fi

exit 0