mirror of git://gcc.gnu.org/git/gcc.git
281 lines
7.9 KiB
Plaintext
281 lines
7.9 KiB
Plaintext
# Process this file with autoconf to produce a configure script.
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# Copyright (C) 1994-2014 Free Software Foundation, Inc.
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# Originally contributed by Dave Love (d.love@dl.ac.uk).
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#
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#This file is part of GCC.
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#
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#GCC is free software; you can redistribute it and/or modify
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#it under the terms of the GNU General Public License as published by
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#the Free Software Foundation; either version 3, or (at your option)
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#any later version.
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#
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#GCC is distributed in the hope that it will be useful,
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#but WITHOUT ANY WARRANTY; without even the implied warranty of
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#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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#GNU General Public License for more details.
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#
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#You should have received a copy of the GNU General Public License
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#along with GCC; see the file COPYING3. If not see
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#<http://www.gnu.org/licenses/>.
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AC_PREREQ(2.64)
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AC_INIT(package-unused, version-unused,, libobjc)
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AC_CONFIG_SRCDIR([objc/objc.h])
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GCC_TOPLEV_SUBDIRS
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# We need the following definitions because AC_PROG_LIBTOOL relies on them
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PACKAGE=libobjc
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# Version is pulled out to make it a bit easier to change using sed.
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VERSION=4:0:0
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AC_SUBST(VERSION)
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# This works around the fact that libtool configuration may change LD
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# for this particular configuration, but some shells, instead of
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# keeping the changes in LD private, export them just because LD is
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# exported.
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ORIGINAL_LD_FOR_MULTILIBS=$LD
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# -------
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# Options
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# -------
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# We use these options to decide which functions to include.
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AC_ARG_WITH(target-subdir,
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[ --with-target-subdir=SUBDIR
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configuring in a subdirectory])
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AC_ARG_WITH(cross-host,
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[ --with-cross-host=HOST configuring with a cross compiler])
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AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
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AC_ARG_ENABLE(version-specific-runtime-libs,
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[ --enable-version-specific-runtime-libs Specify that runtime libraries should be installed in a compiler-specific directory ],
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[case "$enableval" in
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yes) version_specific_libs=yes ;;
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no) version_specific_libs=no ;;
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*) AC_MSG_ERROR([Unknown argument to enable/disable version-specific libs]);;
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esac],
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[version_specific_libs=no])
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AC_MSG_RESULT($version_specific_libs)
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AC_ARG_ENABLE(objc-gc,
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[ --enable-objc-gc enable the use of Boehm's garbage collector with
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the GNU Objective-C runtime.],
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[case $enable_objc_gc in
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no)
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OBJC_GCFLAGS=''
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OBJC_BOEHM_GC=''
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OBJC_BOEHM_GC_INCLUDES=''
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;;
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*)
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OBJC_GCFLAGS='-DOBJC_WITH_GC=1'
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OBJC_BOEHM_GC='libobjc_gc$(libsuffix).la'
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OBJC_BOEHM_GC_INCLUDES='-I$(top_srcdir)/../boehm-gc/include -I../boehm-gc/include'
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;;
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esac],
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[OBJC_GCFLAGS=''; OBJC_BOEHM_GC=''; OBJC_BOEHM_GC_INCLUDES=''])
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AC_SUBST(OBJC_GCFLAGS)
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AC_SUBST(OBJC_BOEHM_GC)
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AC_SUBST(OBJC_BOEHM_GC_INCLUDES)
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# -----------
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# Directories
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# -----------
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# Find the rest of the source tree framework.
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AM_ENABLE_MULTILIB(, ..)
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AC_CANONICAL_SYSTEM
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ACX_NONCANONICAL_TARGET
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# Export source directory.
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# These need to be absolute paths, yet at the same time need to
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# canonicalize only relative paths, because then amd will not unmount
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# drives. Thus the use of PWDCMD: set it to 'pawd' or 'amq -w' if using amd.
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case $srcdir in
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[\\/$]* | ?:[\\/]*) glibcpp_srcdir=${srcdir} ;;
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*) glibcpp_srcdir=`cd "$srcdir" && ${PWDCMD-pwd} || echo "$srcdir"` ;;
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esac
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AC_SUBST(glibcpp_srcdir)
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# Calculate toolexeclibdir
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# Also toolexecdir, though it's only used in toolexeclibdir
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case ${version_specific_libs} in
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yes)
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# Need the gcc compiler version to know where to install libraries
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# and header files if --enable-version-specific-runtime-libs option
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# is selected.
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toolexecdir='$(libdir)/gcc/$(target_noncanonical)'
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toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
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;;
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no)
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if test -n "$with_cross_host" &&
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test x"$with_cross_host" != x"no"; then
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# Install a library built with a cross compiler in tooldir, not libdir.
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toolexecdir='$(exec_prefix)/$(target_noncanonical)'
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toolexeclibdir='$(toolexecdir)/lib'
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else
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toolexecdir='$(libdir)/gcc-lib/$(target_noncanonical)'
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toolexeclibdir='$(libdir)'
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fi
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multi_os_directory=`$CC -print-multi-os-directory`
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case $multi_os_directory in
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.) ;; # Avoid trailing /.
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*) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
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esac
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;;
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esac
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AC_SUBST(toolexecdir)
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AC_SUBST(toolexeclibdir)
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# Figure out if we want to name the include directory and the
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# library name changes differently.
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includedirname=include
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libsuffix=
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case "${host}" in
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*-darwin*)
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# Darwin is the only target so far that needs a different include directory.
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includedirname=include-gnu-runtime
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libsuffix=-gnu
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;;
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esac
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AC_SUBST(includedirname)
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AC_SUBST(libsuffix)
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AC_CONFIG_HEADERS(config.h)
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# --------
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# Programs
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# --------
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GCC_NO_EXECUTABLES
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# We must force CC to /not/ be a precious variable; otherwise
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# the wrong, non-multilib-adjusted value will be used in multilibs.
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# As a side effect, we have to subst CFLAGS ourselves.
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m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
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m4_define([_AC_ARG_VAR_PRECIOUS],[])
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AC_PROG_CC
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m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
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# extra LD Flags which are required for targets
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ACX_LT_HOST_FLAGS
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case "${host}" in
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*-darwin*)
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# Darwin needs -single_module when linking libobjc
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extra_ldflags_libobjc='$(lt_host_flags) -Wl,-single_module'
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;;
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*-cygwin*|*-mingw*)
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# Tell libtool to build DLLs on Windows
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extra_ldflags_libobjc='$(lt_host_flags)'
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;;
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esac
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AC_SUBST(extra_ldflags_libobjc)
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AC_SUBST(CFLAGS)
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AC_CHECK_TOOL(AS, as)
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AC_CHECK_TOOL(AR, ar)
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AC_CHECK_TOOL(RANLIB, ranlib, :)
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AC_PROG_INSTALL
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AM_MAINTAINER_MODE
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# Enable Win32 DLL on MS Windows - FIXME
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AC_LIBTOOL_WIN32_DLL
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AC_PROG_LIBTOOL
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AM_PROG_CC_C_O
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AC_PROG_MAKE_SET
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# -------
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# Headers
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# -------
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# Sanity check for the cross-compilation case:
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AC_CHECK_HEADER(stdio.h,:,
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[AC_MSG_ERROR([Can't find stdio.h.
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You must have a usable C system for the target already installed, at least
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including headers and, preferably, the library, before you can configure
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the Objective C runtime system. If necessary, install gcc now with
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\`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
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AC_HEADER_STDC
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AC_CHECK_HEADERS(sched.h)
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# -----------
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# Miscellanea
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# -----------
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# Check if we have thread-local storage
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GCC_CHECK_TLS
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AC_MSG_CHECKING([for exception model to use])
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AC_LANG_PUSH(C)
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AC_ARG_ENABLE(sjlj-exceptions,
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AS_HELP_STRING([--enable-sjlj-exceptions],
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[force use of builtin_setjmp for exceptions]),
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[:],
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[dnl Botheration. Now we've got to detect the exception model.
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dnl Link tests against libgcc.a are problematic since -- at least
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dnl as of this writing -- we've not been given proper -L bits for
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dnl single-tree newlib and libgloss.
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dnl
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dnl This is what AC_TRY_COMPILE would do if it didn't delete the
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dnl conftest files before we got a change to grep them first.
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cat > conftest.$ac_ext << EOF
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[#]line __oline__ "configure"
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@interface Frob
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@end
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@implementation Frob
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@end
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int proc();
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int foo()
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{
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@try {
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return proc();
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}
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@catch (Frob* ex) {
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return 0;
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}
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}
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EOF
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old_CFLAGS="$CFLAGS"
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dnl work around that we don't have Objective-C support in autoconf
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CFLAGS="-x objective-c -fgnu-runtime -fobjc-exceptions -S"
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if AC_TRY_EVAL(ac_compile); then
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if grep _Unwind_SjLj_Resume conftest.s >/dev/null 2>&1 ; then
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enable_sjlj_exceptions=yes
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elif grep _Unwind_Resume conftest.s >/dev/null 2>&1 ; then
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enable_sjlj_exceptions=no
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fi
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fi
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CFLAGS="$old_CFLAGS"
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rm -f conftest*])
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if test x$enable_sjlj_exceptions = xyes; then
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AC_DEFINE(SJLJ_EXCEPTIONS, 1,
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[Define if the compiler is configured for setjmp/longjmp exceptions.])
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ac_exception_model_name=sjlj
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elif test x$enable_sjlj_exceptions = xno; then
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ac_exception_model_name="call frame"
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else
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AC_MSG_ERROR([unable to detect exception model])
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fi
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AC_LANG_POP(C)
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AC_MSG_RESULT($ac_exception_model_name)
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# ------
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# Output
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# ------
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if test ${multilib} = yes; then
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multilib_arg="--enable-multilib"
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else
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multilib_arg=
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fi
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AC_CONFIG_FILES([Makefile])
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AC_OUTPUT
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