#!/bin/sh
#
# tcc configure script (c) 2003 Fabrice Bellard
#
# set temporary file name
if test ! -z "$TMPDIR" ; then
    TMPDIR1="${TMPDIR}"
elif test ! -z "$TEMPDIR" ; then
    TMPDIR1="${TEMPDIR}"
else
    TMPDIR1="/tmp"
fi

TMPC="${TMPDIR1}/tcc-conf-${RANDOM}-$$-${RANDOM}.c"
TMPO="${TMPDIR1}/tcc-conf-${RANDOM}-$$-${RANDOM}.o"
TMPE="${TMPDIR1}/tcc-conf-${RANDOM}-$$-${RANDOM}"
TMPS="${TMPDIR1}/tcc-conf-${RANDOM}-$$-${RANDOM}.S"
TMPH="${TMPDIR1}/tcc-conf-${RANDOM}-$$-${RANDOM}.h"

# default parameters
build_cross="no"
use_libgcc="no"
prefix=""
execprefix=""
bindir=""
libdir=""
tccdir=""
includedir=""
mandir=""
sysroot=""
cross_prefix=""
cc="gcc"
host_cc="gcc"
ar="ar"
strip="strip"
cpu=`uname -m`
case "$cpu" in
  i386|i486|i586|i686|i86pc|BePC)
    cpu="x86"
  ;;
  x86_64)
    cpu="x86-64"
  ;;
  armv4l)
    cpu="armv4l"
  ;;
  alpha)
    cpu="alpha"
  ;;
  "Power Macintosh"|ppc|ppc64)
    cpu="powerpc"
  ;;
  mips)
    cpu="mips"
  ;;
  s390)
    cpu="s390"
  ;;
  *)
    cpu="unknown"
  ;;
esac
gprof="no"
bigendian="no"
mingw32="no"
LIBSUF=".a"
EXESUF=""

# OS specific
targetos=`uname -s`
case $targetos in
MINGW32*)
mingw32="yes"
;;
DragonFly)
noldl="yes"
;;
OpenBSD)
noldl="yes"
;;
*) ;;
esac

# find source path
# XXX: we assume an absolute path is given when launching configure, 
# except in './configure' case.
source_path=${0%configure}
source_path=${source_path%/}
source_path_used="yes"
if test -z "$source_path" -o "$source_path" = "." ; then
    source_path=`pwd`
    source_path_used="no"
fi

for opt do
  case "$opt" in
  --prefix=*) prefix=`echo $opt | cut -d '=' -f 2`
  ;;
  --exec-prefix=*) execprefix=`echo $opt | cut -d '=' -f 2`
  ;;
  --bindir=*) bindir=`echo $opt | cut -d '=' -f 2`
  ;;
  --libdir=*) libdir=`echo $opt | cut -d '=' -f 2`
  ;;
  --includedir=*) includedir=`echo $opt | cut -d '=' -f 2`
  ;;
  --mandir=*) mandir=`echo $opt | cut -d '=' -f 2`
  ;;
  --sysroot=*) sysroot=`echo $opt | cut -d '=' -f 2`
  ;;
  --source-path=*) source_path=`echo $opt | cut -d '=' -f 2`
  ;;
  --cross-prefix=*) cross_prefix=`echo $opt | cut -d '=' -f 2`
  ;;
  --cc=*) cc=`echo $opt | cut -d '=' -f 2`
  ;;
  --extra-cflags=*) CFLAGS="${opt#--extra-cflags=}"
  ;;
  --extra-ldflags=*) LDFLAGS="${opt#--extra-ldflags=}"
  ;;
  --extra-libs=*) extralibs=${opt#--extra-libs=}
  ;;
  --cpu=*) cpu=`echo $opt | cut -d '=' -f 2`
  ;;
  --enable-gprof) gprof="yes"
  ;;
  --enable-mingw32) mingw32="yes" ; cross_prefix="i386-mingw32-"
  ;; 
  --enable-cross) build_cross="yes"
  ;;
  --with-libgcc) use_libgcc="yes"
  ;;
  --help|-h) show_help="yes"
  ;;
  esac
done

# Checking for CFLAGS
if test -z "$CFLAGS"; then
    CFLAGS="-O2"
fi

cc="${cross_prefix}${cc}"
ar="${cross_prefix}${ar}"
strip="${cross_prefix}${strip}"

if test "$mingw32" = "yes" ; then
    LIBSUF=".lib"
    EXESUF=".exe"
fi

if test -z "$cross_prefix" ; then

# ---
# big/little endian test
cat > $TMPC << EOF
#include <inttypes.h>
int main(int argc, char ** argv){
    volatile uint32_t i=0x01234567;
    return (*((uint8_t*)(&i))) == 0x67;
}
EOF

if $cc -o $TMPE $TMPC 2>/dev/null ; then
    $TMPE && bigendian="yes"
else
    echo big/little test failed
fi

else

# if cross compiling, cannot launch a program, so make a static guess
if test "$cpu" = "powerpc" -o "$cpu" = "mips" -o "$cpu" = "s390" ; then
    bigendian="yes"
fi

fi

# check gcc version
cat > $TMPC <<EOF
int main(void) {
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 2)
return 0;
#else
#error gcc < 3.2
#endif
}
EOF

gcc_major="2"
if $cc -o $TMPO $TMPC 2> /dev/null ; then
    gcc_major="3"
fi
cat > $TMPC <<EOF
int main(void) {
#if __GNUC__ >= 4
return 0;
#else
#error gcc < 4
#endif
}
EOF

if $cc -o $TMPO $TMPC 2> /dev/null ; then
    gcc_major="4"
fi

if test x"$show_help" = "xyes" ; then
cat << EOF

Usage: configure [options]
Options: [defaults in brackets after descriptions]

EOF
echo "Standard options:"
echo "  --help                   print this message"
echo "  --prefix=PREFIX          install in PREFIX [$prefix]"
echo "  --exec-prefix=EPREFIX    install architecture-dependent files in EPREFIX"
echo "                           [same as prefix]"
echo "  --bindir=DIR             user executables in DIR [EPREFIX/bin]"
echo "  --libdir=DIR             object code libraries in DIR [EPREFIX/lib]"
echo "  --includedir=DIR         C header files in DIR [PREFIX/include]"
echo "  --mandir=DIR             man documentation in DIR [PREFIX/man]"
echo "  --enable-cross           build cross compilers"
echo ""
echo "Advanced options (experts only):"
echo "  --source-path=PATH       path of source code [$source_path]"
echo "  --cross-prefix=PREFIX    use PREFIX for compile tools [$cross_prefix]"
echo "  --sysroot=PREFIX         prepend PREFIX to library/include paths []"
echo "  --cc=CC                  use C compiler CC [$cc]"
echo "  --with-libgcc            use /lib/libgcc_s.so.1 instead of libtcc1.a"
echo ""
#echo "NOTE: The object files are build at the place where configure is launched"
exit 1
fi

if test "$mingw32" = "yes" ; then
    if test -z "$prefix" ; then
        prefix="C:/Program Files/tcc"
    fi
    execprefix="$prefix"
    bindir="$prefix"
    tccdir="$prefix"
    docdir="$prefix/doc"
else
    if test -z "$prefix" ; then
        prefix="/usr/local"
    fi
    if test x"$execprefix" = x""; then
        execprefix="${prefix}"
    fi
    if test x"$bindir" = x""; then
        bindir="${execprefix}/bin"
    fi
    if test x"$docdir" = x""; then
        docdir="$prefix/share/doc/tcc"
    fi
fi # mingw32

if test x"$libdir" = x""; then
libdir="${execprefix}/lib"
fi
if test x"$tccdir" = x""; then
tccdir="${execprefix}/lib/tcc"
fi
if test x"$mandir" = x""; then
mandir="${prefix}/man"
fi
if test x"$includedir" = x""; then
includedir="${prefix}/include"
fi

echo "Binary  directory   $bindir"
echo "TinyCC directory    $tccdir"
echo "Library directory   $libdir"
echo "Include directory   $includedir"
echo "Manual directory    $mandir"
echo "Doc directory       $docdir"
echo "Target root prefix  $sysroot"
echo "Source path      $source_path"
echo "C compiler       $cc"
echo "CPU              $cpu"
echo "Big Endian       $bigendian"
echo "gprof enabled    $gprof"
echo "cross compilers  $build_cross"
echo "use libgcc       $use_libgcc"

echo "Creating config.mak and config.h"

echo "# Automatically generated by configure - do not modify" > config.mak
echo "/* Automatically generated by configure - do not modify */" > $TMPH

echo "prefix=\$(DESTDIR)$prefix" >> config.mak
echo "bindir=\$(DESTDIR)$bindir" >> config.mak
echo "tccdir=\$(DESTDIR)$tccdir" >> config.mak
echo "libdir=\$(DESTDIR)$libdir" >> config.mak
echo "includedir=\$(DESTDIR)$includedir" >> config.mak
echo "mandir=\$(DESTDIR)$mandir" >> config.mak
echo "docdir=\$(DESTDIR)$docdir" >> config.mak

echo "#define CONFIG_SYSROOT \"$sysroot\"" >> $TMPH
echo "#define CONFIG_TCCDIR \"$tccdir\"" >> $TMPH
echo "CC=$cc" >> config.mak
echo "GCC_MAJOR=$gcc_major" >> config.mak
echo "#define GCC_MAJOR $gcc_major" >> $TMPH
echo "HOST_CC=$host_cc" >> config.mak
echo "AR=$ar" >> config.mak
echo "STRIP=$strip -s -R .comment -R .note" >> config.mak
echo "CFLAGS=$CFLAGS" >> config.mak
echo "LDFLAGS=$LDFLAGS" >> config.mak
echo "LIBSUF=$LIBSUF" >> config.mak
echo "EXESUF=$EXESUF" >> config.mak
if test "$cpu" = "x86" ; then
  echo "ARCH=i386" >> config.mak
  echo "#define HOST_I386 1" >> $TMPH
elif test "$cpu" = "x86-64" ; then
  echo "ARCH=x86-64" >> config.mak
  echo "#define HOST_X86_64 1" >> $TMPH
elif test "$cpu" = "armv4l" ; then
  echo "ARCH=arm" >> config.mak
  echo "#define HOST_ARM 1" >> $TMPH
elif test "$cpu" = "powerpc" ; then
  echo "ARCH=ppc" >> config.mak
  echo "#define HOST_PPC 1" >> $TMPH
elif test "$cpu" = "mips" ; then
  echo "ARCH=mips" >> config.mak
  echo "#define HOST_MIPS 1" >> $TMPH
elif test "$cpu" = "s390" ; then
  echo "ARCH=s390" >> config.mak
  echo "#define HOST_S390 1" >> $TMPH
elif test "$cpu" = "alpha" ; then
  echo "ARCH=alpha" >> config.mak
  echo "#define HOST_ALPHA 1" >> $TMPH
else
  echo "Unsupported CPU"
  exit 1
fi
if test "$noldl" = "yes" ; then
  echo "CONFIG_NOLDL=yes" >> config.mak
fi
if test "$mingw32" = "yes" ; then
  echo "CONFIG_WIN32=yes" >> config.mak
  echo "#define CONFIG_WIN32 1" >> $TMPH
fi
if test "$bigendian" = "yes" ; then
  echo "WORDS_BIGENDIAN=yes" >> config.mak
  echo "#define WORDS_BIGENDIAN 1" >> $TMPH
fi
if test "$gprof" = "yes" ; then
  echo "TARGET_GPROF=yes" >> config.mak
  echo "#define HAVE_GPROF 1" >> $TMPH
fi
if test "$build_cross" = "yes" ; then
  echo "CONFIG_CROSS=yes" >> config.mak
fi
if test "$use_libgcc" = "yes" ; then
  echo "#define CONFIG_USE_LIBGCC" >> $TMPH
  echo "CONFIG_USE_LIBGCC=yes" >> config.mak
fi
version=`head $source_path/VERSION`
echo "VERSION=$version" >>config.mak
echo "#define TCC_VERSION \"$version\"" >> $TMPH
echo "@set VERSION $version" > config.texi

# build tree in object directory if source path is different from current one
if test "$source_path_used" = "yes" ; then
    DIRS="tests"
    FILES="Makefile tests/Makefile"
    for dir in $DIRS ; do
        mkdir -p $dir
    done
    for f in $FILES ; do
        ln -sf $source_path/$f $f
    done
fi
echo "SRC_PATH=$source_path" >> config.mak

diff $TMPH config.h >/dev/null 2>&1
if test $? -ne 0 ; then
    mv -f $TMPH config.h
else
    echo "config.h is unchanged"
fi

rm -f $TMPO $TMPC $TMPE $TMPS $TMPH