dnl Autoconf configure script for Cygwin.
dnl Copyright 1996, 1997, 1998, 2000, 2001, 2002, 2003 Red Hat, Inc.
dnl
dnl This file is part of Cygwin.
dnl
dnl This software is a copyrighted work licensed under the terms of the
dnl Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
dnl details.
dnl
dnl Process this file with autoconf to produce a configure script.

AC_PREREQ(2.12)dnl
AC_INIT(init.cc)
AC_CONFIG_HEADER(config.h)

AC_PROG_INSTALL

dnl FIXME: We temporarily define our own version of AC_PROG_CC.  This is
dnl copied from autoconf 2.12, but does not call AC_PROG_CC_WORKS.  We
dnl are probably using a cross compiler, which will not be able to fully
dnl link an executable.  This should really be fixed in autoconf
dnl itself.

AC_DEFUN(LIB_AC_PROG_CC,
[AC_BEFORE([$0], [AC_PROG_CPP])dnl
AC_CHECK_TOOL(CC, gcc, gcc)
if test -z "$CC"; then
  AC_CHECK_PROG(CC, cc, cc, , , /usr/ucb/cc)
  test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
fi

AC_PROG_CC_GNU

if test $ac_cv_prog_gcc = yes; then
  GCC=yes
dnl Check whether -g works, even if CFLAGS is set, in case the package
dnl plays around with CFLAGS (such as to build both debugging and
dnl normal versions of a library), tasteless as that idea is.
  ac_test_CFLAGS="${CFLAGS+set}"
  ac_save_CFLAGS="$CFLAGS"
  CFLAGS=
  AC_PROG_CC_G
  if test "$ac_test_CFLAGS" = set; then
    CFLAGS="$ac_save_CFLAGS"
  elif test $ac_cv_prog_cc_g = yes; then
    CFLAGS="-gstabs+ -O2"
  else
    CFLAGS="-O2"
  fi
else
  GCC=
  test "${CFLAGS+set}" = set || CFLAGS="-g"
fi
])

AC_DEFUN(LIB_AC_PROG_CXX,
[AC_BEFORE([$0], [AC_PROG_CPP])dnl
AC_CHECK_TOOL(CXX, g++, g++)
if test -z "$CXX"; then
  AC_CHECK_PROG(CXX, c++, c++, , , )
  test -z "$CC" && AC_MSG_ERROR([no acceptable cc found in \$PATH])
fi

CXXFLAGS='$(CFLAGS)'
])

AC_CANONICAL_SYSTEM

LIB_AC_PROG_CC
LIB_AC_PROG_CXX

case "$with_cross_host" in
  ""|*cygwin*)
    all_host="all_host"
    install_host="install_host"
    ;;
  *)
    all_host=
    install_host=
    ;;
esac

AC_SUBST(all_host)
AC_SUBST(install_host)

AC_CHECK_TOOL(AR, ar, ar)
dnl AC_SUBST(AR)
AC_CHECK_TOOL(AS, as, as)
dnl C_SUBST(AS)
AC_CHECK_TOOL(RANLIB, ranlib, ranlib)
dnl C_SUBST(RANLIB)
AC_CHECK_TOOL(LD, ld, ld)
dnl C_SUBST(LD)
AC_CHECK_TOOL(NM, nm, nm)
dnl C_SUBST(NM)
AC_CHECK_TOOL(DLLTOOL, dlltool, dlltool)
dnl C_SUBST(DLLTOOL)
AC_CHECK_TOOL(WINDRES, windres, windres)
dnl C_SUBST(WINDRES)

AC_ALLOCA
AC_PROG_MAKE_SET

dnl check whether gcc supports __builtin_memset.
# Test for builtin mem* functions.
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([
#include <string.h>
void foo(char *s, int c, size_t n)
{
  __builtin_memset(s, c, n);
}
], [ ],
use_builtin_memset=yes, use_builtin_memset=no)
if test $use_builtin_memset = "yes"; then
  AC_DEFINE(HAVE_BUILTIN_MEMSET)
fi
AC_LANG_RESTORE

AC_ARG_ENABLE(extra-threadsafe-checking,
[ --enable-extra-threadsafe-checking	Build a cygwin DLL which is thread safe with extra consistency checking],
[case "${enableval}" in
yes)
  mt_safe_val=1
  MT_SAFE=yes
  AC_DEFINE(_CYG_THREAD_FAILSAFE)
  ;;
no)
  dnl Don't do anything here to avoid overriding --enable-threadsafe.
  ;;
esac
])

AC_ARG_ENABLE(debugging,
[ --enable-debugging		Build a cygwin DLL which has more consistency checking for debugging],
[case "${enableval}" in
yes)	 AC_DEFINE(DEBUGGING) ;;
no)	 ;;
esac
])

AC_ARG_ENABLE(cygserver,
[ --enable-server		Build a cygwin DLL which can communicate with cygserver],
[case "${enableval}" in
yes)	 AC_DEFINE(USE_CYGSERVE) ;;
no)	 ;;
esac
])

MALLOC_OFILES=
AC_ARG_ENABLE(malloc-debugging,
[ --enable-malloc-debugging		Build a cygwin DLL with heap sanity checking (this is very slow, use only if you have heap corruption problems)],
[case "${enableval}" in
yes)	 AC_DEFINE(MALLOC_DEBUG)
	 MALLOC_OFILES=dlmalloc.o
	 ;;
no)	 ;;
esac
])

AC_ARG_ENABLE(vfork,
[ --enable-vfork		Build a cygwin DLL which uses experimental vfork code],
vfork="${enableval}"
])

case "$vfork" in
no)	 ;;
yes|*)	 AC_DEFINE_UNQUOTED(NEWVFORK) ;;
esac

dnl The only time we might want to transform the install names
dnl is for unix x cygwin.  Otherwise we don't.  For now we don't
dnl transform names.

dnl if test "x$cross_compiling" = "xno" -a ; then
dnl   if test "x$program_transform_name" = "xs,x,x,"; then
dnl     program_transform_name=""
dnl   fi
dnl   if test "x$program_transform_name" = "x"; then
dnl     program_transform_name="s,^,$target_alias-,"
dnl   else
dnl     program_transform_name="$program_transform_name -e s,^,$target_alias-,"
dnl   fi
dnl fi

case "$target_cpu" in
   i?86) DLL_ENTRY="_dll_entry@12"
		DEF_DLL_ENTRY="dll_entry@12"
		ALLOCA="_alloca"
		CONFIG_DIR="i386"  ;;
   powerpc*)	DLL_ENTRY="dll_entry"
		DEF_DLL_ENTRY="dll_entry"
		ALLOCA=" __allocate_stack"
		CONFIG_DIR="ppc"  ;;
   *)		AC_MSG_ERROR(Invalid target processor \"$target_cpu\") ;;
esac

AC_SUBST(MALLOC_OFILES)
AC_SUBST(DLL_ENTRY)
AC_SUBST(DEF_DLL_ENTRY)
AC_SUBST(ALLOCA)
AC_SUBST(CONFIG_DIR)
AC_OUTPUT(Makefile cygwin.def:cygwin.din)