#! /bin/sh

# configure
# Copyright 1984-2017 Cisco Systems, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

machs=""; last=""; sep0=""; sep1=""; sep2=""; sep3=""; sep4=" and ";
for fn in boot/*/scheme.boot ; do
  machs=$machs$sep0$last
  last=`echo $fn | sed -e 's/boot\/\(.*\)\/scheme.boot/\1/'`
  sep0=$sep1; sep1=", "; sep2=$sep3; sep3=$sep4; sep4=", and "
done
machs=$machs$sep2$last

m=""
w=""
threads=no
temproot=""
help=no
gzipmanpages=yes
installowner=""
installgroup=""
installbin=""
installlib=""
installman=""
installschemename="scheme"
installpetitename="petite"
installscriptname="scheme-script"
disablex11=no
disablecurses=no
: ${CC:="gcc"}
: ${CPPFLAGS:=""}
: ${CFLAGS:=""}
: ${LD:="ld"}
: ${LDFLAGS:=""}
: ${AR:="ar"}
: ${ARFLAGS:="rc"}
: ${RANLIB:="ranlib"}
: ${WINDRES:="windres"}
zlibInc=-I../zlib
LZ4Inc=-I../lz4/lib
zlibDep=../zlib/libz.a
LZ4Dep=../lz4/lib/liblz4.a
zlibLib=../zlib/libz.a
LZ4Lib=../lz4/lib/liblz4.a
zlibHeaderDep="../zlib/zconf.h ../zlib/zlib.h"
LZ4HeaderDep="../lz4/lib/lz4.h ../lz4/lib/lz4frame.h"
Kernel=KernelO
installkerneltarget=installkernelobj
installzlibtarget=
installlz4target=

# On WSL, set OS to "Windows_NT" to create a Windows
# build instead of a Linux (on Windows) build:
if [ "$OS" = "Windows_NT" ] ; then
    CONFIG_UNAME="CYGWIN_NT-"
else
    CONFIG_UNAME=`uname`
fi

case "${CONFIG_UNAME}" in
  Linux)
    if uname -a | egrep 'i386|i686|amd64|athlon|x86_64' > /dev/null 2>&1 ; then
      m32=i3le
      m64=a6le
      tm32=ti3le
      tm64=ta6le
    elif uname -a | grep -i power > /dev/null 2>&1 ; then
      m32=ppc32le
      m64=""
      tm32=tppc32le
      tm64=""
    fi
    installprefix=/usr
    installmansuffix=share/man
    ;;
  QNX)
    if uname -a | egrep 'x86' > /dev/null 2>&1 ; then
      m32=i3qnx
      tm32=ti3qnx
    fi
    installprefix=/usr/local
    installmansuffix=man
    ;;
  FreeBSD)
    if uname -a | egrep 'i386|i686|amd64|athlon|x86_64' > /dev/null 2>&1 ; then
      m32=i3fb
      m64=a6fb
      tm32=ti3fb
      tm64=ta6fb
    fi
    installprefix=/usr/local
    installmansuffix=man
    ;;
  OpenBSD)
    if uname -a | egrep 'i386|i686|amd64|athlon|x86_64' > /dev/null 2>&1 ; then
      m32=i3ob
      m64=a6ob
      tm32=ti3ob
      tm64=ta6ob
    fi
    installprefix=/usr/local
    installmansuffix=man
    ;;
  NetBSD)
    if uname -a | egrep 'i386|i686|amd64|athlon|x86_64' > /dev/null 2>&1 ; then
      m32=i3nb
      m64=a6nb
      tm32=ti3nb
      tm64=ta6nb
    fi
    installprefix=/usr
    installmansuffix=share/man
    gzipmanpages=no
    ;;
  Darwin)
    if uname -a | egrep 'i386|i686|amd64|athlon|x86_64' > /dev/null 2>&1 ; then
      m32=i3osx
      m64=a6osx
      tm32=ti3osx
      tm64=ta6osx
    fi
    installprefix=/usr/local
    installmansuffix=share/man
    ;;
  SunOS)
    if uname -a | egrep 'i386|i686|amd64|athlon|x86_64' > /dev/null 2>&1 ; then
      m32=i3s2
      m64=a6s2
      tm32=ti3s2
      tm64=ta6s2
      installprefix=/usr
      installmansuffix=share/man
      gzipmanpages=no
    fi
    ;;
  CYGWIN_NT-*)
    if uname -a | egrep 'i386|i686|amd64|athlon|x86_64' > /dev/null 2>&1 ; then
      m32=i3nt
      m64=a6nt
      tm32=ti3nt
      tm64=ta6nt
      installprefix=/usr/local
      installmansuffix=share/man
    fi
    ;;
esac

threads=""
bits=""

while [ $# != 0 ] ; do
  case $1 in
    -m=*)
      m=`echo $1 | sed -e 's/^-m=//'`
      ;;
    --machine=*)
      m=`echo $1 | sed -e 's/^--machine=//'`
      ;;
    --threads)
      threads=yes
      ;;
    --64)
      bits=64
      ;;
    --32)
      bits=32
      ;;
    --installprefix=*)
      installprefix=`echo $1 | sed -e 's/^--installprefix=//'`
      ;;
    --installlib=*)
      installlib=`echo $1 | sed -e 's/^--installlib=//'`
      ;;
    --installbin=*)
      installbin=`echo $1 | sed -e 's/^--installbin=//'`
      ;;
    --installman=*)
      installman=`echo $1 | sed -e 's/^--installman=//'`
      ;;
    --installowner=*)
      installowner=`echo $1 | sed -e 's/^--installowner=//'`
      ;;
    --installgroup=*)
      installgroup=`echo $1 | sed -e 's/^--installgroup=//'`
      ;;
    --installschemename=*)
      installschemename=`echo $1 | sed -e 's/^--installschemename=//'`
      ;;
    --installpetitename=*)
      installpetitename=`echo $1 | sed -e 's/^--installpetitename=//'`
      ;;
    --installscriptname=*)
      installscriptname=`echo $1 | sed -e 's/^--installscriptname=//'`
      ;;
    --toolprefix=*)
      toolprefix=`echo $1 | sed -e 's/^--toolprefix=//'`
      CC="${toolprefix}${CC}"
      LD="${toolprefix}${LD}"
      AR="${toolprefix}${AR}"
      RANLIB="${toolprefix}${RANLIB}"
      WINDRES="${toolprefix}${WINDRES}"
      ;;
    --gzip-man-pages)
      gzipmanpages=yes
      ;;
    --nogzip-man-pages)
      gzipmanpages=no
      ;;
    --temproot=*)
      temproot=`echo $1 | sed -e 's/^--temproot=//'`
      ;;
    --workarea=*)
      w=`echo $1 | sed -e 's/^--workarea=//'`
      ;;
    --help)
      help=yes
      ;;
    --disable-x11)
      disablex11=yes
      ;;
    --disable-curses)
      disablecurses=yes
      ;;
    --libkernel)
      Kernel=KernelLib
      installkerneltarget=installkernellib
      if [ "$zlibInc" != "" ]; then
          installzlibtarget=installzlib
      fi
      if [ "$LZ4Inc" != "" ]; then
          installlz4target=installlz4
      fi
      ;;
    --kernelobj)
      Kernel=KernelO
      installkerneltarget=installkernelobj
      installzlibtarget=
      installlz4target=
      ;;
    CC=*)
      CC=`echo $1 | sed -e 's/^CC=//'`
      ;;
    CPPFLAGS=*)
      CPPFLAGS=`echo $1 | sed -e 's/^CPPFLAGS=//'`
      ;;
    CFLAGS=*)
      CFLAGS=`echo $1 | sed -e 's/^CFLAGS=//'`
      ;;
    LD=*)
      LD=`echo $1 | sed -e 's/^LD=//'`
      ;;
    LDFLAGS=*)
      LDFLAGS=`echo $1 | sed -e 's/^LDFLAGS=//'`
      ;;
    AR=*)
      AR=`echo $1 | sed -e 's/^AR=//'`
      ;;
    ARFLAGS=*)
      ARFLAGS=`echo $1 | sed -e 's/^ARFLAGS=//'`
      ;;
    RANLIB=*)
      RANLIB=`echo $1 | sed -e 's/^RANLIB=//'`
      ;;
    WINDRES=*)
      WINDRES=`echo $1 | sed -e 's/^WINDRES=//'`
      ;;
    ZLIB=*)
      zlibLib=`echo $1 | sed -e 's/^ZLIB=//'`
      zlibInc=
      zlibDep=
      zlibHeaderDep=
      installzlibtarget=
      ;;
    LZ4=*)
      LZ4Lib=`echo $1 | sed -e 's/^LZ4=//'`
      LZ4Inc=
      LZ4Dep=
      LZ4HeaderDep=
      installlz4target=
      ;;
    *)
      echo "option '$1' unrecognized or missing an argument; try $0 --help"
      exit 1
      ;;
  esac
  shift
done

if [ "$bits" = "" ] ; then
  if uname -a | egrep 'amd64|x86_64' > /dev/null 2>&1 ; then
    bits=64
  else
    bits=32
  fi
fi

if [ "$threads" = "" ] ; then
  threads=no
fi

if [ "$m" = "" ] ; then
  if [ $bits = 64 ] ; then
    if [ $threads = yes ] ; then m=$tm64 ; else m=$m64 ; fi
  else
    if [ $threads = yes ] ; then m=$tm32 ; else m=$m32 ; fi
  fi
fi

if [ "$w" = "" ] ; then
  w=$m
fi

if [ "$installbin" = "" ] ; then
  installbin=$installprefix/bin
fi

if [ "$installlib" = "" ] ; then
  installlib=$installprefix/lib
fi

if [ "$installman" = "" ] ; then
  installman=$installprefix/$installmansuffix
fi

if [ "$disablex11" = "no" ] ; then
  if [ $m = a6osx ] || [ $m = ta6osx ] ; then
    if [ ! -d /opt/X11/include/ ] ; then
      disablex11=yes
    fi
  fi
fi

if [ "$help" = "yes" ]; then
  echo "Purpose:"
  echo "  $0 determines the machine type and constructs a custom Makefile"
  echo "  and Mf-install, taking into account the options below."
  echo ""
  echo "Options (defaults shown in parens):"
  echo "  --machine=<machine type>          explicitly specify machine type ($m)"
  echo "  -m=<machine type>                 same as --machine <machine type> ($m)"
  echo "  --threads                         specify threaded version ($threads)"
  echo "  --32|--64                         specify 32/64-bit version ($bits)"
  echo "  --disable-x11                     disable X11 support"
  echo "  --disable-curses                  disable [n]curses support"
  echo "  --libkernel                       build libkernel.a instead of kernel.o"
  echo "  --kernelobj                       build kernel.o (the default)"
  echo "  --installprefix=<pathname>        final installation root ($installprefix)"
  echo "  --installbin=<pathname>           bin directory ($installbin)"
  echo "  --installlib=<pathname>           lib directory ($installlib)"
  echo "  --installman=<pathname>           manpage directory ($installman)"
  echo "  --temproot=<pathname>             staging root ($temproot)"
  echo "  --installowner=<ownername>        install with owner ($installowner)"
  echo "  --installgroup=<groupname>        install with group ($installgroup)"
  echo "  --installschemename=<schemename>  install with group ($installschemename)"
  echo "  --installpetitename=<petitename>  install with group ($installpetitename)"
  echo "  --installscriptname=<scriptname>  install with group ($installscriptname)"
  echo "  --toolprefix=<prefix>             prefix tool (compiler, linker, ...) names"
  echo "  --[no]gzip-man-pages              compress manual pages ($gzipmanpages)"
  echo "  --workarea=<pathname>             build directory ($w)"
  echo "  CC=<C compiler>                   C compiler"
  echo "  CPPFLAGS=<C preprocessor flags>   additional C preprocessor flags ($CPPFLAGS)"
  echo "  CFLAGS=<C compiler flags>         additional C compiler flags ($CFLAGS)"
  echo "  LD=<linker>                       linker"
  echo "  LDFLAGS=<linker flags>            additional linker flags ($LDFLAGS)"
  echo "  AR=<archiver>                     archiver"
  echo "  ARFLAGS=<archiver flgs>           archiver flags"
  echo "  RANLIB=<archive indexer>          archive indexer"
  echo "  WINDRES=<resource compiler>       resource compiler"
  echo "  ZLIB=<lib>                        link to <lib> instead of own zlib"
  echo "  LZ4=<lib>                         link to <lib> instead of own LZ4"
  echo ""
  echo "Available machine types: $machs"
  echo ""
  echo "Examples:"
  echo "  $0 --machine=i3le"
  echo ""
  echo "  set machine-type to i3le rather than to determined type"
  echo ""
  echo "  $0 --threads --installprefix=/usr/local"
  echo ""
  echo "  specify threaded version and set installation directory to /usr/local."
  echo ""
  echo "  $0 --installprefix=/usr/local --temproot=/tmp"
  echo ""
  echo "  declare the final destination to be /usr/local but staging area"
  echo "  to be /tmp/usr/local.  Make will record the final destination in the"
  echo "  installed manual pages but actually install the system and manual"
  echo "  pages in the staging area."
  echo ""
  exit 0
fi

if [ "$m" = "" -o ! -f boot/$m/scheme.boot ] ; then
  echo "no suitable machine type found"
  echo "try rerunning as $0 -m=<machine type>"
  echo "available machine types: $machs"
  exit 1
fi

./workarea $m $w

sed -e 's/$(m)/'$m'/g'\
    -e 's/$(workarea)/'$w'/g'\
  makefiles/Makefile.in > Makefile

sed -e 's/$(m)/'$m'/g'\
    makefiles//Makefile-csug.in > csug/Makefile

sed -e 's/$(m)/'$m'/g'\
    makefiles//Makefile-release_notes.in > release_notes/Makefile

cat makefiles/Makefile-workarea.in > $w/Makefile

sed -e 's/$(m)/'$m'/g'\
    -e 's/$(workarea)/'$w'/g'\
    makefiles/Mf-boot.in > $w/Mf-boot

sed -e "s;^m=none\$;m=$m;"\
    -e "s;^InstallBin=.*\$;InstallBin=$installbin;"\
    -e "s;^InstallLib=.*\$;InstallLib=$installlib;"\
    -e "s;^InstallMan=.*\$;InstallMan=$installman/man1;"\
    -e "s;^InstallOwner=.*\$;InstallOwner=$installowner;"\
    -e "s;^InstallGroup=.*\$;InstallGroup=$installgroup;"\
    -e "s;^TempRoot=.*;TempRoot=$temproot;"\
    -e "s;^GzipManPages=.*$;GzipManPages=$gzipmanpages;"\
    -e "s;^InstallSchemeName=.*$;InstallSchemeName=$installschemename;"\
    -e "s;^InstallPetiteName=.*$;InstallPetiteName=$installpetitename;"\
    -e "s;^InstallScriptName=.*$;InstallScriptName=$installscriptname;"\
    -e "s;^InstallKernelTarget=.*$;InstallKernelTarget=$installkerneltarget;"\
    -e "s;^InstallZlibTarget=.*$;InstallZlibTarget=$installzlibtarget;"\
    -e "s;^InstallLZ4Target=.*$;InstallLZ4Target=$installlz4target;"\
    makefiles/Mf-install.in > $w/Mf-install

cat > $w/c/config.h << END
#define SCHEME_SCRIPT "$installscriptname"
#ifndef WIN32
#define DEFAULT_HEAP_PATH "$installlib/csv%v/%m"
#endif
END

if [ "$disablex11" = "yes" ]; then
  echo '#define DISABLE_X11' >> $w/c/config.h
fi

cursesLib=-lcurses
ncursesLib=-lncurses

if [ "$disablecurses" = "yes" ]; then
  echo '#define DISABLE_CURSES' >> $w/c/config.h
  cursesLib=
  ncursesLib=
fi

cat > $w/c/Mf-config << END
CC=$CC
CPPFLAGS=$CPPFLAGS
CFLAGS=$CFLAGS
LD=$LD
LDFLAGS=$LDFLAGS
AR=$AR
ARFLAGS=$ARFLAGS
RANLIB=$RANLIB
WINDRES=$WINDRES
cursesLib=$cursesLib
ncursesLib=$ncursesLib
zlibInc=$zlibInc
LZ4Inc=$LZ4Inc
zlibDep=$zlibDep
LZ4Dep=$LZ4Dep
zlibLib=$zlibLib
LZ4Lib=$LZ4Lib
zlibHeaderDep=$zlibHeaderDep
LZ4HeaderDep=$LZ4HeaderDep
Kernel=\${${Kernel}}
KernelLinkDeps=\${${Kernel}LinkDeps}
KernelLinkLibs=\${${Kernel}LinkLibs}
END