:
#!/bin/sh -x
# The above : is necessary on some buggy systems.

# configure: Guess values for system-dependent variables
# Output the flag definitions to the file "flags".
#
# Parameters: $1 = $CC, $2 = $CFLAGS, $3 = $IZ_BZIP2
#
# This file is typically called from Makefile rather than executed
# from the command line.
#
# To construct zip automatically using this file, type
# "make -f unix/Makefile generic".
# If this fails, then type "make list" to get a list of special targets.

trap "rm -f conftest* core a.out; exit 1" 1 2 3 15

CC=${1-cc}
CFLAGS=${2-"-I. -DUNIX"}
LFLAGS1=${LDFLAGS}
LFLAGS2=''
LN="ln -s"

CFLAGS_OPT=''

# bzip2
IZ_BZIP2=${3-}
CFLAGS_BZ=''


echo 'Check C compiler type (optimization options)'
# Sun C?
cat > conftest.c << _EOF_
int main()
{
#ifndef __SUNPRO_C
   bad code
#endif
   return 0;
}
_EOF_
$CC $CFLAGS -c conftest.c > /dev/null 2>/dev/null
if test $? -eq 0; then
  CFLAGS_OPT='-xO3'
  echo "  Sun C ($CFLAGS_OPT)"
else
  # Tru64 DEC/Compaq/HP C?
  cat > conftest.c << _EOF_
int main()
{
#ifndef __DECC
   bad code
#endif
   return 0;
}
_EOF_
  $CC $CFLAGS -c conftest.c > /dev/null 2>/dev/null
  if test $? -eq 0; then
    CFLAGS_OPT='-O3'
    echo "  DEC C ($CFLAGS_OPT)"
  else
    # HP-UX HP C?
    cat > conftest.c << _EOF_
int main()
{
#ifdef __GNUC__
   bad code
#endif
#ifndef __hpux
   bad code
#endif
   return 0;
}
_EOF_
    $CC $CFLAGS -c conftest.c > /dev/null 2>/dev/null
    if test $? -eq 0; then
      # HP-UX, not GCC.  Lame bundled or real ANSI compiler?
      CFLAGS_OPT_TRY="+O3 +Onolimit"
      $CC $CFLAGS $CFLAGS_OPT_TRY -c conftest.c 2>&1 | \
       grep '(Bundled)' > /dev/null
      if test $? -ne 0; then
        CFLAGS_OPT="$CFLAGS_OPT_TRY"
        echo "  HP-UX ANSI C ($CFLAGS_OPT)"
      else
        echo '  HP-UX Bundled C (no opt)'
      fi
    else
      # GNU C?
      cat > conftest.c << _EOF_
int main()
{
#ifndef __GNUC__
   bad code
#endif
   return 0;
}
_EOF_
      $CC $CFLAGS -c conftest.c > /dev/null 2>/dev/null
      if test $? -eq 0; then
        # CFLAGS_OPT='-O3'
        echo "  GNU C ($CFLAGS_OPT)"
        # Special Mac OS X shared library "ld" option?
        if test ` uname -s 2> /dev/null ` = 'Darwin'; then
          lf='-Wl,-search_paths_first'
          $CC $CFLAGS $lf conftest.c > /dev/null 2>/dev/null
          if test $? -eq 0; then
            LFLAGS2="${LFLAGS2} ${lf}"
          fi
          rm -f conftest
        fi
      else
        CFLAGS_OPT='-O'
        echo "  Other-unknown C ($CFLAGS_OPT)"
      fi
    fi
  fi
fi

# optimization flags
if test -n "${CFLAGS_OPT}"; then
  CFLAGS="${CFLAGS} ${CFLAGS_OPT}"
  CFLAGS_BZ="${CFLAGS_BZ} ${CFLAGS_OPT}"
fi


# bzip2

echo "Check bzip2 support"
CC_BZ="${CC}"
LIB_BZ=''
if test -n "${IZ_BZIP2}"; then
  echo "  Check for bzip2 compiled library in IZ_BZIP2 (${IZ_BZIP2})"
  if test -f "${IZ_BZIP2}/libbz2.a"; then
#
#   A bzip2 library built with BZ_NO_STDIO should have an
#   unresolved external, "bz_internal_error".  The default,
#   full-function library will not mention it.
#
    nm ${IZ_BZIP2}/libbz2.a | grep bz_internal_error > /dev/null
    if test $? -eq 0; then
      echo "    Found bzip2 BZ_NO_STDIO library, ${IZ_BZIP2}/libbz2.a"
    else
      echo "    Found bzip2 library, ${IZ_BZIP2}/libbz2.a,"
      echo "      but library not compiled with BZ_NO_STDIO"
      echo "    WARNING:  We recommend using a bzip2 library compiled"
      echo "      with BZ_NO_STDIO defined for proper error handling"
      echo "    Please see the Zip installation instructions in bzip2/install.txt"
      echo "    Continuing anyway with standard bzip2 library..."
    fi
    if test -f "${IZ_BZIP2}/bzlib.h"; then
      CFLAGS="${CFLAGS} -I${IZ_BZIP2} -DBZIP2_SUPPORT"
      LFLAGS2="${LFLAGS2} -L${IZ_BZIP2} -lbz2"
      echo "-- Found bzip2 library - linking in bzip2"
    else
      echo "    ${IZ_BZIP2}/bzlib.h not found"
      echo "-- Since IZ_BZIP2 defined, skipping OS and bzip2 dir checks - no bzip2"
    fi
  else
    echo "    ${IZ_BZIP2}/libbz2.a not found"
    echo "-- Since IZ_BZIP2 defined, skipping OS and bzip2 checks - no bzip2"
  fi
else
  echo "  Check for bzip2 in bzip2 directory"
  IZ_BZIP2=bzip2
  if test -f "${IZ_BZIP2}/libbz2.a"; then
    nm ${IZ_BZIP2}/libbz2.a | grep bz_internal_error > /dev/null
    if test $? -eq 0; then
      echo "    Found bzip2 BZ_NO_STDIO library in bzip2 directory"
    else
      echo "    Found bzip2 library in bzip2 directory,"
      echo "      but not built with the BZ_NO_STDIO option"
      echo "    WARNING:  We recommend using a bzip2 library compiled"
      echo "      with BZ_NO_STDIO defined for proper error handling"
      echo "    Please see the Zip installation instructions"
      echo "    Continuing anyway with standard bzip2 library..."
    fi
  fi
  if test -f "bzip2/bzlib.h" -a -f "bzip2/libbz2.a"; then
    CFLAGS="${CFLAGS} -I${IZ_BZIP2} -DBZIP2_SUPPORT"
    LFLAGS2="${LFLAGS2} -Lbzip2 -lbz2"
    echo "-- Found bzip2 library - linking in bzip2"
  else
    if test -f "bzip2/bzlib.c" -a -f "bzip2/bzlib.h"; then
      echo "-- No library, but found bzip2 source in bzip2 directory"
      echo "-- Will try to build bzip2 library from source and link in"
#
# Arrange to build a BZ_NO_STDIO bzip2 object library using the
# same compiler and optimization options as used for Zip, and
# to compile and link Zip with bzip2.
#
      CFLAGS_BZ="${CFLAGS_BZ} -DBZ_NO_STDIO"
      LIB_BZ="bzip2/libbz2.a"
      CFLAGS="${CFLAGS} -Ibzip2 -DBZIP2_SUPPORT"
      LFLAGS2="${LFLAGS2} -Lbzip2 -lbz2"
    else
      echo "  Check if OS already has bzip2 library installed"
      cat > conftest.c << _EOF_
#include "bzlib.h"
int main()
{
  bz_stream strm;
  BZ2_bzCompressEnd(&strm);
  return 0;
}
_EOF_
      $CC $CFLAGS -o conftest conftest.c -lbz2 > /dev/null 2>/dev/null
      if test $? -eq 0; then
        echo "-- OS supports bzip2 - linking in bzip2"
        CFLAGS="${CFLAGS} -DBZIP2_SUPPORT"
        LFLAGS2="${LFLAGS2} -lbz2"
      else
        echo "-- Either bzlib.h or libbz2.a not found - no bzip2"
      fi
    fi
  fi
fi


echo Check for the C preprocessor
# on SVR4, cc -E does not produce correct assembler files. Need /lib/cpp.
CPP="${CC} -E"
# solaris as(1) needs -P, maybe others as well ?
[ -f /usr/ccs/lib/cpp ] && CPP="/usr/ccs/lib/cpp -P"
[ -f /usr/lib/cpp ] && CPP=/usr/lib/cpp
[ -f /lib/cpp ] && CPP=/lib/cpp
[ -f /usr/bin/cpp ] && CPP=/usr/bin/cpp
[ -f /xenix ] && CPP="${CC} -E"
[ -f /lynx.os ] && CPP="${CC} -E"

echo "#include <stdio.h>" > conftest.c
$CPP conftest.c >/dev/null 2>/dev/null || CPP="${CC} -E"


echo Check if we can use asm code
OBJA=""
OCRCU8=""
if eval "$CPP match.S > _match.s 2>/dev/null"; then
  if test ! -s _match.s || grep error < _match.s > /dev/null; then
    :
  elif eval "$CC -c _match.s >/dev/null 2>/dev/null" && [ -f _match.o ]; then
    CFLAGS="${CFLAGS} -DASMV"
    OBJA="match.o"
    echo "int foo() { return 0;}" > conftest.c
    $CC -c conftest.c >/dev/null 2>/dev/null
    echo Check if compiler generates underlines
    nm conftest.o | grep "(^|[^_])foo" >/dev/null 2>/dev/null
    [ $? -eq 0 ] && CPP="${CPP} -DNO_UNDERLINE"
    if eval "$CPP crc_i386.S > _crc_i386.s 2>/dev/null"; then
      if eval "$CC -c _crc_i386.s >/dev/null 2>/dev/null" && [ -f _crc_i386.o ]
      then
        OBJA="$OBJA crc_i386.o"
        OCRCU8="crc_i386.o"
        CFLAGS="${CFLAGS} -DASM_CRC"
      fi
    fi
  fi
fi
rm -f _match.s _match.o _crc_i386.s _crc_i386.o


# ANSI options for compilers that don't have __STDC__ defined by default
# Currently HPUX, pyramid, Dynix, AIX, OSF/1 and ultrix

echo Check for ANSI options
cat > conftest.c << _EOF_
int main()
{
#ifndef __STDC__
   forget it
#endif
   return 0;
}
_EOF_
$CC $CFLAGS -c conftest.c > /dev/null 2>/dev/null
if [ $? -ne 0 ]; then
  for OPT in -Ae -Xa -qlanglvl=ansi -std1 -std
  do
    $CC $CFLAGS $OPT -c conftest.c > /dev/null 2>/dev/null
    [ $? -eq 0 ] && CFLAGS="${CFLAGS} ${OPT}" && break
  done
fi


echo Check for prototypes
echo "int main(int argc, char *argv[]) { return 0; }" > conftest.c
$CC $CFLAGS -c conftest.c > /dev/null 2>/dev/null
[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNO_PROTO"

# const check currently handles mips cc and non ANSI compilers.
# does it need more ?
echo Check the handling of const
cat > conftest.c << _EOF_
typedef int charset[2];
int main()
{
  const charset x;
  const char *foo;
  return 0;
}
_EOF_
$CC $CFLAGS -c conftest.c >/dev/null 2>/dev/null
[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNO_CONST"


echo Check for time_t
cat > conftest.c << _EOF_
#include <sys/types.h>
#include <time.h>
int main()
{
  time_t t;
  return 0;
}
_EOF_
$CC $CFLAGS -c conftest.c >/dev/null 2>/dev/null
[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNO_TIME_T"


echo Check for size_t
cat > conftest.c << _EOF_
#include <sys/types.h>
int main()
{
  size_t s;
  return 0;
}
_EOF_
$CC $CFLAGS -c conftest.c >/dev/null 2>/dev/null
[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNO_SIZE_T"


echo Check for off_t
cat > conftest.c << _EOF_
#include <sys/types.h>
int main()
{
  off_t s;
  return 0;
}
_EOF_
$CC $CFLAGS -c conftest.c >/dev/null 2>/dev/null
[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNO_OFF_T"


echo Check size of UIDs and GIDs
echo "(Now zip stores variable size UIDs/GIDs using a new extra field.  This"
echo " tests if this OS uses 16-bit UIDs/GIDs and so if the old 16-bit storage"
echo " should also be used for backward compatibility.)"
# Added 2008-04-15 CS
cat > conftest.c << _EOF_
# define _LARGEFILE_SOURCE          /* some OSes need this for fseeko */
# define _LARGEFILE64_SOURCE
# define _FILE_OFFSET_BITS 64       /* select default interface as 64 bit */
# define _LARGE_FILES               /* some OSes need this for 64-bit off_t */
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
int main()
{
  struct stat s;

  printf("  s.st_uid is %u bytes\n", sizeof(s.st_uid));
  printf("  s.st_gid is %u bytes\n", sizeof(s.st_gid));

  /* see if have 16-bit UID */
  if (sizeof(s.st_uid) != 2) {
    return 1;
  }
  /* see if have 16-bit GID */
  if (sizeof(s.st_gid) != 2) {
    return 2;
  }
  return 3;
}
_EOF_
# compile it
$CC -o conftest conftest.c >/dev/null 2>/dev/null
if [ $? -ne 0 ]; then
  echo -- UID/GID test failed on compile - disabling old 16-bit UID/GID support
  CFLAGS="${CFLAGS} -DUIDGID_NOT_16BIT"
else
# run it
  ./conftest
  r=$?
  if [ $r -eq 1 ]; then
    echo -- UID not 2 bytes - disabling old 16-bit UID/GID support
    CFLAGS="${CFLAGS} -DUIDGID_NOT_16BIT"
  elif [ $r -eq 2 ]; then
    echo -- GID not 2 bytes - disabling old 16-bit UID/GID support
    CFLAGS="${CFLAGS} -DUIDGID_NOT_16BIT"
  elif [ $r -eq 3 ]; then
    echo -- 16-bit UIDs and GIDs - keeping old 16-bit UID/GID support
  else
    echo -- test failed - conftest returned $r - disabling old 16-bit UID/GID support
    CFLAGS="${CFLAGS} -DUIDGID_NOT_16BIT"
  fi
fi


# LFS check borrowed from autotools sources
# lib/autoconf/specific.m4

echo Check for Large File Support
cat > conftest.c << _EOF_
# define _LARGEFILE_SOURCE       /* some OSes need this for fseeko */
# define _LARGEFILE64_SOURCE
# define _FILE_OFFSET_BITS 64       /* select default interface as 64 bit */
# define _LARGE_FILES        /* some OSes need this for 64-bit off_t */
#include <sys/types.h>

 /* Check that off_t can represent 2**63 - 1 correctly.
    We can't simply define LARGE_OFF_T to be 9223372036854775807,
    since some C++ compilers masquerading as C compilers
    incorrectly reject 9223372036854775807.  */
#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
  int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
		       && LARGE_OFF_T % 2147483647 == 1)
		      ? 1 : -1];

int main()
{
  return 0;
}
_EOF_
# compile it
$CC -o conftest conftest.c >/dev/null 2>/dev/null
if [ $? -ne 0 ]; then
  echo -- no Large File Support
else
  echo -- yes we have Large File Support!
  CFLAGS="${CFLAGS} -DLARGE_FILE_SUPPORT"
fi


# Check for wide char for Unicode support
# Added 11/24/2005 EG

echo Check for wide char support
cat > conftest.c << _EOF_
#include <stdlib.h>
#include <stdio.h>
int main()
{
  int wsize;
  wchar_t *wide_string;

  if ((wide_string = (wchar_t *)malloc(4 * sizeof(wchar_t))) == NULL) {
    return 0;
  }
  /* get wide string */
  wsize = mbstowcs(wide_string, "foo", 3);
  wide_string[wsize] = (wchar_t) NULL;
  return 1;
}
_EOF_
# compile it
$CC -o conftest conftest.c >/dev/null 2>/dev/null
# OCRCU8 is used by all utilities if Unicode is enabled
# OCRCTB is only used by zipcloak
if [ $? -ne 0 ]; then
  echo -- no Unicode support
  OCRCU8=""
  OCRCTB="crc32_.o"
else
# have wide char support
  echo -- have wchar_t - enabling Unicode support
  CFLAGS="${CFLAGS} -DUNICODE_SUPPORT"
  OCRCU8="crc32_.o ${OCRCU8}"
  OCRCTB=""
fi


# from configure 2.4i (Onno) 12/5/04

echo Check for gcc no-builtin flag
# -fno-builtin since version 2
cat > conftest.c << _EOF_
int main()
{
#if __GNUC__ >= 2
   return 0;
#else
   forget it
#endif
}
_EOF_
$CC $CFLAGS -c conftest.c >/dev/null 2>/dev/null
[ $? -eq 0 ] && BFLAG="-fno-builtin"


# Check for missing functions
# add NO_'function_name' to flags if missing

for func in rmdir strchr strrchr rename mktemp mktime mkstemp
do
  echo Check for $func
  echo "int main(){ $func(); return 0; }" > conftest.c
  $CC $BFLAG -o conftest conftest.c >/dev/null 2>/dev/null
  [ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNO_`echo $func | tr '[a-z]' '[A-Z]'`"
done


echo Check for memset
echo "int main(){ char k; memset(&k,0,0); return 0; }" > conftest.c
$CC -o conftest conftest.c >/dev/null 2>/dev/null
[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DZMEM"


echo Check for memmove
cat > conftest.c << _EOF_
#include <string.h>
int main() { int a; int b = 0; memmove( &a, &b, sizeof( a)); return a; }
_EOF_
$CC -o conftest conftest.c >/dev/null 2>/dev/null
[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNEED_MEMMOVE"


echo Check for strerror
cat > conftest.c << _EOF_
#include <string.h>
int main() { strerror( 0); return 0; }
_EOF_
$CC -o conftest conftest.c >/dev/null 2>/dev/null
[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNEED_STRERROR"

echo Check for errno declaration
cat > conftest.c << _EOF_
#include <errno.h>
main()
{
  errno = 0;
  return 0;
}
_EOF_
$CC $CFLAGS -c conftest.c >/dev/null 2>/dev/null
[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNO_ERRNO"


echo Check for directory libraries
cat > conftest.c << _EOF_
int main() { return closedir(opendir(".")); }
_EOF_

$CC -o conftest conftest.c >/dev/null 2>/dev/null
if [ $? -ne 0 ]; then
  OPT=""
  for lib in ndir dir ucb bsd BSD PW x dirent
  do
    $CC -o conftest conftest.c -l$lib >/dev/null 2>/dev/null
    [ $? -eq 0 ] && OPT=-l$lib && break
  done
  if [ ${OPT} ]; then
    LFLAGS2="${LFLAGS2} ${OPT}"
  else
    CFLAGS="${CFLAGS} -DNO_DIR"
  fi
fi


# Dynix/ptx 1.3 needed this

echo Check for readlink
echo "int main(){ return readlink(); }" > conftest.c
$CC -o conftest conftest.c >/dev/null 2>/dev/null
if [ $? -ne 0 ]; then
  $CC -o conftest conftest.c -lseq >/dev/null 2>/dev/null
  [ $? -eq 0 ] && LFLAGS2="${LFLAGS2} -lseq"
fi


echo Check for directory include file
OPT=""
for inc in dirent.h sys/ndir.h ndir.h sys/dir.h
do
   echo "#include <$inc>" > conftest.c
   $CPP conftest.c > /dev/null 2>/dev/null
   [ $? -eq 0 ] && OPT="-DHAVE_`echo $inc | tr '[a-z]./' '[A-Z]__'`" && break
done
CFLAGS="${CFLAGS} ${OPT}"


echo Check for nonexistent include files
for inc in stdlib.h stddef.h unistd.h fcntl.h string.h
do
   echo "#include <$inc>" > conftest.c
   $CPP conftest.c >/dev/null 2>/dev/null
   [ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNO_`echo $inc | tr '[a-z]./' '[A-Z]__'`"
done


echo Check for term I/O include file
OPT=""
for inc in termios.h termio.h sgtty.h
do
   echo "#include <$inc>" > conftest.c
   $CPP conftest.c > /dev/null 2>/dev/null
   [ $? -eq 0 ] && OPT="-DHAVE_`echo $inc | tr '[a-z]./' '[A-Z]__'`" && break
done
CFLAGS="${CFLAGS} ${OPT}"


# needed for AIX (and others ?) when mmap is used

echo Check for valloc
cat > conftest.c << _EOF_
main()
{
#ifdef MMAP
    valloc();
#endif
}
_EOF_
$CC ${CFLAGS} -c conftest.c > /dev/null 2>/dev/null
[ $? -ne 0 ] && CFLAGS="${CFLAGS} -DNO_VALLOC"


echo Check for /usr/local/bin and /usr/local/man
BINDIR=$HOME/bin
[ -d /usr/local/bin ] && BINDIR=/usr/local/bin

MANDIR=manl
[ -d /usr/man/manl ]       && MANDIR=/usr/man/manl
[ -d /usr/local/man/manl ] && MANDIR=/usr/local/man/manl
[ -d /usr/local/man/man1 ] && MANDIR=/usr/local/man/man1


echo Check for OS-specific flags
if [ -f /usr/bin/hostinfo ]; then
  if /usr/bin/hostinfo | grep NeXT > /dev/null; then
    CFLAGS="${CFLAGS} -posix"
    LFLAGS1="${LFLAGS1} -posix -object"
  fi
# XXX ATT6300, Cray
elif [ -f /xenix ]; then
  if uname -p | grep 286 > /dev/null; then
    CFLAGS="${CFLAGS} -LARGE -Mel2 -DMEDIUM_MEM -DWSIZE=16384 -DNO_VOID"
    LFLAGS1="${LFLAGS1} -LARGE -Mel2"
  fi
elif uname -X >/dev/null 2>/dev/null; then
# SCO shared library check
  echo "int main() { return 0;}" > conftest.c
  $CC -o conftest conftest.c -lc_s -nointl >/dev/null 2> /dev/null
  [ $? -eq 0 ] && LFLAGS2="-lc_s -nointl"
else
  SYSTEM=`uname -s 2>/dev/null` || SYSTEM="unknown"
  echo "int main() { return 0;}" > conftest.c
  case $SYSTEM in
     OSF1|ULTRIX)
        echo Check for -Olimit option
        $CC ${CFLAGS} -Olimit 1000 -o conftest conftest.c >/dev/null 2>/dev/null
        [ $? -eq 0 ] && CFLAGS="${CFLAGS} -Olimit 1000"
        ;;
###     HP-UX)
###        echo Check for +Onolimit option
###        $CC ${CFLAGS} +Onolimit -o conftest conftest.c >/dev/null 2>/dev/null
###        [ $? -eq 0 ] && CFLAGS="${CFLAGS} +Onolimit"
###        ;;
###     SunOS)
###        CFLAGS="${CFLAGS} -D_FILE_OFFSET_BITS=64"
###        ;;
  esac
fi


echo Check for symbolic links
ln -s /dev/null null > /dev/null 2>/dev/null || LN=ln


rm -f a.out conftest.c conftest.o conftest null

echo CC=\"${CC}\" CFLAGS=\"${CFLAGS}\"  CPP=\"${CPP}\" OBJA=\"${OBJA}\" \
       OCRCU8=\"${OCRCU8}\" OCRCTB=\"${OCRCTB}\" \
       BINDIR=${BINDIR} MANDIR=${MANDIR} LFLAGS1=\"${LFLAGS1}\" \
       LFLAGS2=\"${LFLAGS2}\" LN=\"${LN}\" \
       CC_BZ=\"${CC_BZ}\" CFLAGS_BZ=\"${CFLAGS_BZ}\" \
       IZ_BZIP2=\"${IZ_BZIP2}\" LIB_BZ=\"${LIB_BZ}\" > flags