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# Process this file with autoconf to produce a configure script.

#   Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004

#   2005, 2006, 2009, 2011 Free Software Foundation, Inc.

#   Originally contributed by Dave Love (d.love@dl.ac.uk).

#

#This file is part of GCC.

#

#GCC is free software; you can redistribute it and/or modify

#it under the terms of the GNU General Public License as published by

#the Free Software Foundation; either version 3, or (at your option)

#any later version.

#

#GCC is distributed in the hope that it will be useful,

#but WITHOUT ANY WARRANTY; without even the implied warranty of

#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

#GNU General Public License for more details.

#

#You should have received a copy of the GNU General Public License

#along with GCC; see the file COPYING3.  If not see

#.

AC_PREREQ(2.64)

AC_INIT(package-unused, version-unused,, libobjc)

AC_CONFIG_SRCDIR([objc/objc.h])

GCC_TOPLEV_SUBDIRS

# We need the following definitions because AC_PROG_LIBTOOL relies on them

PACKAGE=libobjc

# Version is pulled out to make it a bit easier to change using sed.

VERSION=4:0:0

AC_SUBST(VERSION)

# This works around the fact that libtool configuration may change LD

# for this particular configuration, but some shells, instead of

# keeping the changes in LD private, export them just because LD is

# exported.

ORIGINAL_LD_FOR_MULTILIBS=$LD

# -------

# Options

# -------

# We use these options to decide which functions to include.

AC_ARG_WITH(target-subdir,

[  --with-target-subdir=SUBDIR

                           configuring in a subdirectory])

AC_ARG_WITH(cross-host,

[  --with-cross-host=HOST  configuring with a cross compiler])

AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])

AC_ARG_ENABLE(version-specific-runtime-libs,

[  --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory ],

[case "$enableval" in

 yes) version_specific_libs=yes ;;

 no)  version_specific_libs=no ;;

 *)   AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;

 esac],

[version_specific_libs=no])

AC_MSG_RESULT($version_specific_libs)

AC_ARG_ENABLE(objc-gc,

[  --enable-objc-gc       enable the use of Boehm's garbage collector with

                          the GNU Objective-C runtime.],

[case $enable_objc_gc in

  no)

    OBJC_GCFLAGS=''

    OBJC_BOEHM_GC=''

    OBJC_BOEHM_GC_INCLUDES=''

    ;;

  *)

    OBJC_GCFLAGS='-DOBJC_WITH_GC=1'

    OBJC_BOEHM_GC='libobjc_gc$(libsuffix).la'

    OBJC_BOEHM_GC_INCLUDES='-I$(top_srcdir)/../boehm-gc/include -I../boehm-gc/include'

    case "${host}" in

      alpha*-dec-osf*)

        # boehm-gc headers include , which needs to be compiled

        # with -pthread on Tru64 UNIX.

        OBJC_GCFLAGS="${OBJC_GCFLAGS} -pthread"

        ;;

    esac

    ;;

esac],

[OBJC_GCFLAGS=''; OBJC_BOEHM_GC=''; OBJC_BOEHM_GC_INCLUDES=''])

AC_SUBST(OBJC_GCFLAGS)

AC_SUBST(OBJC_BOEHM_GC)

AC_SUBST(OBJC_BOEHM_GC_INCLUDES)

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

# Directories

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

# Find the rest of the source tree framework.

AM_ENABLE_MULTILIB(, ..)

AC_CANONICAL_SYSTEM

ACX_NONCANONICAL_TARGET

# Export source directory.

# These need to be absolute paths, yet at the same time need to

# canonicalize only relative paths, because then amd will not unmount

# drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.

case $srcdir in

  [\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;

  *) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;

esac

AC_SUBST(glibcpp_srcdir)

# Calculate toolexeclibdir

# Also toolexecdir, though it's only used in toolexeclibdir

case ${version_specific_libs} in

  yes)

    # Need the gcc compiler version to know where to install libraries

    # and header files if --enable-version-specific-runtime-libs option

    # is selected.

    toolexecdir='$(libdir)/gcc/$(target_noncanonical)'

    toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'

    ;;

  no)

    if test -n "$with_cross_host" &&

       test x"$with_cross_host" != x"no"; then

      # Install a library built with a cross compiler in tooldir, not libdir.

      toolexecdir='$(exec_prefix)/$(target_noncanonical)'

      toolexeclibdir='$(toolexecdir)/lib'

    else

      toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'

      toolexeclibdir='$(libdir)'

    fi

    multi_os_directory=`$CC -print-multi-os-directory`

    case $multi_os_directory in

      .) ;; # Avoid trailing /.

      *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;

    esac

    ;;

esac

AC_SUBST(toolexecdir)

AC_SUBST(toolexeclibdir)

# Figure out if we want to name the include directory and the

#  library name changes differently.

includedirname=include

libsuffix=

case "${host}" in

  *-darwin*)

    # Darwin is the only target so far that needs a different include directory.

    includedirname=include-gnu-runtime

    libsuffix=-gnu

    ;;

esac

AC_SUBST(includedirname)

AC_SUBST(libsuffix)

AC_CONFIG_HEADERS(config.h)

# --------

# Programs

# --------

GCC_NO_EXECUTABLES

# We must force CC to /not/ be a precious variable; otherwise

# the wrong, non-multilib-adjusted value will be used in multilibs.

# As a side effect, we have to subst CFLAGS ourselves.

m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])

m4_define([_AC_ARG_VAR_PRECIOUS],[])

AC_PROG_CC

m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])

# extra LD Flags which are required for targets

ACX_LT_HOST_FLAGS

case "${host}" in

  *-darwin*)

    # Darwin needs -single_module when linking libobjc

    extra_ldflags_libobjc='$(lt_host_flags) -Wl,-single_module'

    ;;

  *-cygwin*|*-mingw*)

    # Tell libtool to build DLLs on Windows

    extra_ldflags_libobjc='$(lt_host_flags)'

    ;;

esac

AC_SUBST(extra_ldflags_libobjc)

AC_SUBST(CFLAGS)

AC_CHECK_TOOL(AS, as)

AC_CHECK_TOOL(AR, ar)

AC_CHECK_TOOL(RANLIB, ranlib, :)

AC_PROG_INSTALL

AM_MAINTAINER_MODE

# Enable Win32 DLL on MS Windows - FIXME

AC_LIBTOOL_WIN32_DLL

AC_PROG_LIBTOOL

AM_PROG_CC_C_O

AC_PROG_MAKE_SET

# -------

# Headers

# -------

# Sanity check for the cross-compilation case:

AC_CHECK_HEADER(stdio.h,:,

  [AC_MSG_ERROR([Can't find stdio.h.

You must have a usable C system for the target already installed, at least

including headers and, preferably, the library, before you can configure

the Objective C runtime system.  If necessary, install gcc now with

\`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])

AC_HEADER_STDC

AC_CHECK_HEADERS(sched.h)

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

# Miscellanea

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

# Check if we have thread-local storage

GCC_CHECK_TLS

AC_MSG_CHECKING([for exception model to use])

AC_LANG_PUSH(C)

AC_ARG_ENABLE(sjlj-exceptions,

  AS_HELP_STRING([--enable-sjlj-exceptions],

                 [force use of builtin_setjmp for exceptions]),

[:],

[dnl Botheration.  Now we've got to detect the exception model.

dnl Link tests against libgcc.a are problematic since -- at least

dnl as of this writing -- we've not been given proper -L bits for

dnl single-tree newlib and libgloss.

dnl

dnl This is what AC_TRY_COMPILE would do if it didn't delete the

dnl conftest files before we got a change to grep them first.

cat > conftest.$ac_ext << EOF

[#]line __oline__ "configure"

@interface Frob

@end

@implementation Frob

@end

int proc();

int foo()

{

  @try {

   return proc();

  }

  @catch (Frob* ex) {

    return 0;

  }

}

EOF

old_CFLAGS="$CFLAGS"

dnl work around that we don't have Objective-C support in autoconf

CFLAGS="-x objective-c -fgnu-runtime -fobjc-exceptions -S"

if AC_TRY_EVAL(ac_compile); then

  if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then

    enable_sjlj_exceptions=yes

  elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then

    enable_sjlj_exceptions=no

  fi

fi

CFLAGS="$old_CFLAGS"

rm -f conftest*])

if test x$enable_sjlj_exceptions = xyes; then

  AC_DEFINE(SJLJ_EXCEPTIONS, 1,

        [Define if the compiler is configured for setjmp/longjmp exceptions.])

  ac_exception_model_name=sjlj

elif test x$enable_sjlj_exceptions = xno; then

  ac_exception_model_name="call frame"

else

  AC_MSG_ERROR([unable to detect exception model])

fi

AC_LANG_POP(C)

AC_MSG_RESULT($ac_exception_model_name)

# ------

# Output

# ------

if test ${multilib} = yes; then

  multilib_arg="--enable-multilib"

else

  multilib_arg=

fi

AC_CONFIG_FILES([Makefile])

AC_OUTPUT