#!/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
#
# bashism: TMPN="${TMPDIR1}/tcc-conf-${RANDOM}-$$-${RANDOM}.c"

TMPN="./conftest-$$"
TMPH=$TMPN.h

# default parameters
prefix=""
execprefix=""
bindir=""
libdir=""
tccdir=""
includedir=""
mandir=""
infodir=""
sysroot=""
cross_prefix=""
cc="gcc"
ar="ar"
strip="strip"
bigendian="no"
mingw32="no"
LIBSUF=".a"
EXESUF=""
DLLSUF=".so"
tcc_sysincludepaths=""
tcc_libpaths=""
tcc_crtprefix=""
tcc_elfinterp=""
triplet=
tcc_lddir=
confvars=
suggest="yes"
cpu=
cpuver=
gcc_major=0
gcc_minor=0

# OS specific
targetos=`uname`
case $targetos in
  Darwin)
    confvars="$confvars OSX"
    DLLSUF=".dylib"
    ;;
  MINGW*|MSYS*|CYGWIN*)
    mingw32=yes
    ;;
  DragonFly|OpenBSD|FreeBSD|NetBSD)
    confvars="$confvars ldl=no"
    ;;
  *)
    ;;
esac

# find source path
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
  eval opt=\"$opt\"
  case "$opt" in
  --prefix=*) prefix=`echo $opt | cut -d '=' -f 2`
  ;;
  --exec-prefix=*) execprefix=`echo $opt | cut -d '=' -f 2`
  ;;
  --tccdir=*) tccdir=`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`
  ;;
  --sharedir=*) sharedir=`echo $opt | cut -d '=' -f 2`
  ;;
  --mandir=*) mandir=`echo $opt | cut -d '=' -f 2`
  ;;
  --infodir=*) infodir=`echo $opt | cut -d '=' -f 2`
  ;;
  --docdir=*) docdir=`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`
  ;;
  --ar=*) ar=`echo $opt | cut -d '=' -f 2`
  ;;
  --extra-cflags=*) CFLAGS="${opt#--extra-cflags=}"
  ;;
  --extra-ldflags=*) LDFLAGS="${opt#--extra-ldflags=}"
  ;;
  --extra-libs=*) extralibs="${opt#--extra-libs=}"
  ;;
  --sysincludepaths=*) tcc_sysincludepaths=`echo $opt | cut -d '=' -f 2`
  ;;
  --libpaths=*) tcc_libpaths=`echo $opt | cut -d '=' -f 2`
  ;;
  --crtprefix=*) tcc_crtprefix=`echo $opt | cut -d '=' -f 2`
  ;;
  --elfinterp=*) tcc_elfinterp=`echo $opt | cut -d '=' -f 2`
  ;;
  --triplet=*) triplet=`echo $opt | cut -d '=' -f 2`
  ;;
  --cpu=*) cpu=`echo $opt | cut -d '=' -f 2`
  ;;
  --enable-cross) confvars="$confvars cross"
  ;;
  --disable-static) confvars="$confvars static=no"
  ;;
  --enable-static) confvars="$confvars static"
  ;;
  --disable-rpath) confvars="$confvars rpath=no"
  ;;
  --strip-binaries) confvars="$confvars strip"
  ;;
  --with-libgcc) confvars="$confvars libgcc"
  ;;
  --with-selinux) confvars="$confvars selinux"
  ;;
  --config-mingw32*) mingw32=$(echo "$opt=yes" | cut -d '=' -f 2)
  ;;
  --config-*) confvars="$confvars ${opt#--config-}"; suggest="no"
  ;;
  --help|-h) show_help="yes"
  ;;
  *) echo "configure: WARNING: unrecognized option $opt"
  ;;
  esac
done

if test -z "$cpu" ; then
    if test -n "$ARCH" ; then
	cpu="$ARCH"
    else
	cpu=`uname -m`
    fi
fi

case "$cpu" in
  x86|i386|i486|i586|i686|i86pc|BePC|i686-AT386)
    cpu="i386"
  ;;
  x86_64|amd64|x86-64)
    cpu="x86_64"
  ;;
  arm*)
    case "$cpu" in
      arm|armv4l)
	cpuver=4
      ;;
      armv5tel|armv5tejl)
	cpuver=5
      ;;
      armv6j|armv6l)
	cpuver=6
      ;;
      armv7a|armv7l)
	cpuver=7
      ;;
    esac
    cpu="arm"
  ;;
  aarch64)
    cpu="aarch64"
  ;;
  alpha)
    cpu="alpha"
  ;;
  "Power Macintosh"|ppc|ppc64)
    cpu="ppc"
  ;;
  mips)
    cpu="mips"
  ;;
  s390)
    cpu="s390"
  ;;
  *)
    echo "Unsupported CPU"
    exit 1
  ;;
esac

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

if test "$mingw32" = "yes" ; then
    if test "$source_path_used" = "no"; then
      source_path="."
    fi
    if test "$cc" = gcc; then
      test -z "$LDFLAGS" && LDFLAGS="-static"
    fi
    test -z "$prefix" && prefix="C:/Program Files/tcc"
    test -z "$tccdir" && tccdir="${prefix}"
    test -z "$bindir" && bindir="${tccdir}"
    test -z "$docdir" && docdir="${tccdir}/doc"
    test -z "$libdir" && libdir="${tccdir}/libtcc"
    confvars="$confvars WIN32"
    LIBSUF=".lib"
    EXESUF=".exe"
    DLLSUF=".dll"
else
    if test -z "$prefix" ; then
      prefix="/usr/local"
    fi
    if test -z "$sharedir" ; then
      sharedir="${prefix}/share"
    fi
    if test x"$execprefix" = x""; then
      execprefix="${prefix}"
    fi
    if test x"$libdir" = x""; then
      libdir="${execprefix}/lib"
    fi
    if test x"$bindir" = x""; then
      bindir="${execprefix}/bin"
    fi
    if test x"$docdir" = x""; then
      docdir="${sharedir}/doc"
    fi
    if test x"$mandir" = x""; then
      mandir="${sharedir}/man"
    fi
    if test x"$infodir" = x""; then
      infodir="${sharedir}/info"
    fi
    if test x"$tccdir" = x""; then
      tccdir="${libdir}/tcc"
    fi
    if test x"$includedir" = x""; then
      includedir="${prefix}/include"
    fi
fi # mingw32

if test x"$show_help" = "xyes" ; then
cat << EOF
Usage: configure [options]
Options: [defaults in brackets after descriptions]

Standard options:
  --help                   print this message
  --prefix=PREFIX          install in PREFIX [$prefix]
  --exec-prefix=EPREFIX    install architecture-dependent files in EPREFIX
			   [same as prefix]
  --bindir=DIR             user executables in DIR [EPREFIX/bin]
  --libdir=DIR             object code libraries in DIR [EPREFIX/lib]
  --tccdir=DIR             installation directory [EPREFIX/lib/tcc]
  --includedir=DIR         C header files in DIR [PREFIX/include]
  --sharedir=DIR           documentation root DIR [PREFIX/share]
  --docdir=DIR             documentation in DIR [SHAREDIR/doc/tcc]
  --mandir=DIR             man documentation in DIR [SHAREDIR/man]
  --infodir=DIR            info documentation in DIR [SHAREDIR/info]

Advanced options (experts only):
  --source-path=PATH       path of source code [$source_path]
  --cross-prefix=PREFIX    use PREFIX for compile tools [$cross_prefix]
  --sysroot=PREFIX         prepend PREFIX to library/include paths []
  --cc=CC                  use C compiler CC [$cc]
  --ar=AR                  create archives using AR [$ar]
  --extra-cflags=          specify compiler flags [$CFLAGS]
  --extra-ldflags=         specify linker options []
  --cpu=CPU                CPU [$cpu]
  --strip-binaries         strip symbol tables from resulting binaries
  --disable-static         make libtcc.so instead of libtcc.a
  --enable-static          make libtcc.a instead of libtcc.dll (win32)
  --disable-rpath          disable use of -rpath with the above
  --with-libgcc            use libgcc_s.so.1 instead of libtcc1.a
  --enable-cross           build cross compilers
  --with-selinux           use mmap for executable memory (with tcc -run)
  --sysincludepaths=...    specify system include paths, colon separated
  --libpaths=...           specify system library paths, colon separated
  --crtprefix=...          specify locations of crt?.o, colon separated
  --elfinterp=...          specify elf interpreter
  --triplet=...            specify system library/include directory triplet
  --config-uClibc,-musl,-mingw32... enable system specific configurations
EOF
#echo "NOTE: The object files are build at the place where configure is launched"
exit 1
fi

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

if test -z "$cross_prefix" ; then
  CONFTEST=./conftest$EXESUF
  if ! $cc -o $CONFTEST $source_path/conftest.c 2>/dev/null ; then
    echo "configure: error: '$cc' failed to compile conftest.c."
  else
    gcc_major="$($CONFTEST version)"
    gcc_minor="$($CONFTEST minor)"
  fi
  bigendian="$($CONFTEST bigendian)"
  if test "$mingw32" = "no" ; then

      if test -z "$triplet"; then
        tt="$($CONFTEST triplet)"
        if test -n "$tt" -a -f "/usr/lib/$tt/crti.o" ; then
          triplet="$tt"
        fi
      fi

      if test -z "$triplet"; then
        if test $cpu = "x86_64" -o $cpu = "aarch64" ; then
          if test -f "/usr/lib64/crti.o" ; then
            tcc_lddir="lib64"
          fi
        fi
      fi

      if test "$cpu" = "arm" ; then
	if test "${triplet%eabihf}" != "$triplet" ; then
	   confvars="$confvars arm_eabihf"
	elif test "${triplet%eabi}" != "$triplet" ; then
	   confvars="$confvars arm_eabi"
	fi
	if grep -s -q "^Features.* \(vfp\|iwmmxt\) " /proc/cpuinfo ; then
	   confvars="$confvars arm_vfp"
	fi
      fi

      if test "$suggest" = "yes"; then
        if test -f "/lib/ld-uClibc.so.0" ; then
          echo "Perhaps you want ./configure --config-uClibc"
        fi
        if test -f "/lib/ld-musl-$cpu.so.1"; then
          echo "Perhaps you want ./configure --config-musl"
        fi
      fi
  fi
else
  # if cross compiling, cannot launch a program, so make a static guess
  case $cpu in
    ppc|mips|s390)  bigendian=yes;;
  esac
fi

if test "$bigendian" = "yes" ; then
  confvars="$confvars BIGENDIAN"
fi

# a final configuration tuning
if ! echo "$cc" | grep -q "tcc"; then
  OPT1="-Wdeclaration-after-statement -fno-strict-aliasing"
  # we want -Wno- but gcc does not always reject unknown -Wno- options
  OPT2="-Wpointer-sign -Wsign-compare -Wunused-result"
  if echo "$cc" | grep -q "clang"; then
    OPT1="$OPT1 -fheinous-gnu-extensions"
    OPT2="$OPT2 -Wstring-plus-int"
  fi
  $cc $OPT1 $OPT2 -o a.out -c -xc - < /dev/null > cc_msg.txt 2>&1
  for o in $OPT1; do # enable these options
    if ! grep -q -- $o cc_msg.txt; then CFLAGS="$CFLAGS $o"; fi
  done
  for o in $OPT2; do # disable these options
    if ! grep -q -- $o cc_msg.txt; then CFLAGS="$CFLAGS -Wno-${o#-W*}"; fi
  done
  # cat cc_msg.txt
  # echo $CFLAGS
  rm -f cc_msg.txt a.out
fi

fcho() { if test -n "$2"; then echo "$1$2"; fi }

fcho "Binary directory    " "$bindir"
fcho "TinyCC directory    " "$tccdir"
fcho "Library directory   " "$libdir"
fcho "Include directory   " "$includedir"
fcho "Manual directory    " "$mandir"
fcho "Info directory      " "$infodir"
fcho "Doc directory       " "$docdir"
fcho "Target root prefix  " "$sysroot"
echo "Source path         $source_path"
echo "C compiler          $cc ($gcc_major.$gcc_minor)"
echo "Target OS           $targetos"
echo "CPU                 $cpu"
fcho "Triplet             " "$triplet"
fcho "Config              " "${confvars# }"
echo "Creating config.mak and config.h"

cat >config.mak <<EOF
# Automatically generated by configure - do not modify
prefix=$prefix
bindir=\$(DESTDIR)$bindir
tccdir=\$(DESTDIR)$tccdir
libdir=\$(DESTDIR)$libdir
includedir=\$(DESTDIR)$includedir
mandir=\$(DESTDIR)$mandir
infodir=\$(DESTDIR)$infodir
docdir=\$(DESTDIR)$docdir
CC=$cc
GCC_MAJOR=$gcc_major
GCC_MINOR=$gcc_minor
AR=$ar
STRIP=$strip -s -R .comment -R .note
CFLAGS=$CFLAGS
LDFLAGS=$LDFLAGS
LIBSUF=$LIBSUF
EXESUF=$EXESUF
DLLSUF=$DLLSUF
EOF

print_inc() {
  if test -n "$2"; then
    echo "#ifndef $1" >> $TMPH
    echo "# define $1 \"$2\"" >> $TMPH
    echo "#endif" >> $TMPH
  fi
}

print_mak() {
  if test -n "$2"; then
    echo "NATIVE_DEFINES+=-D$1=\"\\\"$2\\\"\"" >> config.mak
  fi
}

print_mak_int() {
  if test -n "$2"; then
    echo "NATIVE_DEFINES+=-D$1=$2" >> config.mak
  fi
}

echo "/* Automatically generated by configure - do not modify */" > $TMPH

print_inc CONFIG_SYSROOT "$sysroot"
print_inc CONFIG_TCCDIR "$tccdir"
print_mak CONFIG_TCC_SYSINCLUDEPATHS "$tcc_sysincludepaths"
print_mak CONFIG_TCC_LIBPATHS "$tcc_libpaths"
print_mak CONFIG_TCC_CRTPREFIX "$tcc_crtprefix"
print_mak CONFIG_TCC_ELFINTERP "$tcc_elfinterp"
print_mak CONFIG_LDDIR "$tcc_lddir"
print_mak CONFIG_TRIPLET "$triplet"
print_mak_int TCC_CPU_VERSION "$cpuver"

if test "$cpu" = "aarch64" ; then
  echo "ARCH=arm64" >> config.mak
else
  echo "ARCH=$cpu" >> config.mak
fi
echo "TARGETOS=$targetos" >> config.mak

for v in $confvars ; do
  if test "${v%=*}" = "$v"; then
    echo "CONFIG_$v=yes" >> config.mak
  else
    echo "CONFIG_$v" >> config.mak
  fi
done

version=`head $source_path/VERSION`
echo "VERSION = $version" >> config.mak
echo "#define TCC_VERSION \"$version\"" >> $TMPH
echo "@set VERSION $version" > config.texi

if test "$source_path_used" = "yes" ; then
    case $source_path in
       /*) echo "TOPSRC=$source_path";;
	*) echo "TOPSRC=\$(TOP)/$source_path";;
     esac >>config.mak
else
     echo 'TOPSRC=$(TOP)' >>config.mak
fi

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 $TMPN* $CONFTEST

# ---------------------------------------------------------------------------
# build tree in object directory if source path is different from current one

fn_makelink()
{
    tgt=$1/$2
    case $2 in
    */*) dn=${2%/*}
	 test -d $dn || mkdir -p $dn
	 case $1 in
	 /*) ;;
	  *) while test $dn ; do
		tgt=../$tgt; dn=${dn#${dn%%/*}}; dn=${dn#/}
	     done
	     ;;
	 esac
	 ;;
    esac

    ln -sfn $tgt $2 || ( echo "ln failed. Using cp instead."; cp -f $1/$2 $2 )
}

if test "$source_path_used" = "yes" ; then
  FILES="Makefile lib/Makefile tests/Makefile tests/tests2/Makefile tests/pp/Makefile"
  for f in $FILES ; do
    fn_makelink $source_path $f
  done
fi

# ---------------------------------------------------------------------------