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gcc/libobjc/configure.ac

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# Process this file with autoconf to produce a configure script.
# Copyright (C) 1994-2020 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
#<http://www.gnu.org/licenses/>.
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)
# -----------
# 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='$(lt_host_flags)'
;;
esac
AC_SUBST(extra_ldflags_libobjc)
# Add CET specific flags if CET is enabled
GCC_CET_FLAGS(CET_FLAGS)
XCFLAGS="$XCFLAGS $CET_FLAGS"
AC_SUBST(CFLAGS)
AC_SUBST(XCFLAGS)
AC_CHECK_TOOL(AS, as)
AC_CHECK_TOOL(AR, ar)
AC_CHECK_TOOL(RANLIB, ranlib, :)
AC_PROG_INSTALL
AM_MAINTAINER_MODE
# Enable Win32 DLL on MS Windows - FIXME
AC_LIBTOOL_WIN32_DLL
AC_PROG_LIBTOOL
AM_PROG_CC_C_O
AC_PROG_MAKE_SET
# -------
# Headers
# -------
# Sanity check for the cross-compilation case:
AC_CHECK_HEADER(stdio.h,:,
[AC_MSG_ERROR([Can't find stdio.h.
You must have a usable C system for the target already installed, at least
including headers and, preferably, the library, before you can configure
the Objective C runtime system. If necessary, install gcc now with
\`LANGUAGES=c', then the target library, then build with \`LANGUAGES=objc'.])])
AC_HEADER_STDC
AC_CHECK_HEADERS(sched.h)
# -----------
# Miscellanea
# -----------
# Check if we have thread-local storage
GCC_CHECK_TLS
gt_BITFIELD_TYPE_MATTERS
# -----------
# boehm-gc
# -----------
AC_ARG_ENABLE(objc-gc,
[AS_HELP_STRING([--enable-objc-gc],
[enable use of Boehm's garbage collector with the
GNU Objective-C runtime])],,enable_objc_gc=no)
AC_ARG_WITH([target-bdw-gc],
[AS_HELP_STRING([--with-target-bdw-gc=PATHLIST],
[specify prefix directory for installed bdw-gc package.
Equivalent to --with-target-bdw-gc-include=PATH/include
plus --with-target-bdw-gc-lib=PATH/lib])])
AC_ARG_WITH([target-bdw-gc-include],
[AS_HELP_STRING([--with-target-bdw-gc-include=PATHLIST],
[specify directories for installed bdw-gc include files])])
AC_ARG_WITH([target-bdw-gc-lib],
[AS_HELP_STRING([--with-target-bdw-gc-lib=PATHLIST],
[specify directories for installed bdw-gc library])])
case "$enable_objc_gc" in
no)
use_bdw_gc=no
;;
*)
AC_MSG_CHECKING([for bdw garbage collector])
if test "x$with_target_bdw_gc$with_target_bdw_gc_include$with_target_bdw_gc_lib" = x; then
dnl no bdw-gw options, assuming bdw-gc in default locations
BDW_GC_CFLAGS=
BDW_GC_LIBS="-lgc"
else
dnl bdw-gw options passed by configure flags
if test "x$with_target_bdw_gc_include" = x && test "x$with_target_bdw_gc_lib" != x; then
AC_MSG_ERROR([found --with-target-bdw-gc-lib but --with-target-bdw-gc-include missing])
elif test "x$with_target_bdw_gc_include" != x && test "x$with_target_bdw_gc_lib" = x; then
AC_MSG_ERROR([found --with-target-bdw-gc-include but --with-target-bdw-gc-lib missing])
else
AC_MSG_RESULT([using paths configured with --with-target-bdw-gc options])
fi
mldir=`${CC-gcc} --print-multi-directory 2>/dev/null`
bdw_val=
if test "x$with_target_bdw_gc" != x; then
for i in `echo $with_target_bdw_gc | tr ',' ' '`; do
case "$i" in
*=*) sd=${i%%=*}; d=${i#*=} ;;
*) sd=.; d=$i ;;
esac
if test "$mldir" = "$sd"; then
bdw_val=$d
fi
done
if test "x$bdw_val" = x; then
AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc])
fi
bdw_inc_dir="$bdw_val/include"
bdw_lib_dir="$bdw_val/lib"
fi
bdw_val=
if test "x$with_target_bdw_gc_include" != x; then
for i in `echo $with_target_bdw_gc_include | tr ',' ' '`; do
case "$i" in
*=*) sd=${i%%=*}; d=${i#*=} ;;
*) sd=.; d=$i; fallback=$i ;;
esac
if test "$mldir" = "$sd"; then
bdw_val=$d
fi
done
if test "x$bdw_val" = x && test "x$bdw_inc_dir" = x && test "x$fallback" != x; then
bdw_inc_dir="$fallback"
elif test "x$bdw_val" = x; then
AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-include])
else
bdw_inc_dir="$bdw_val"
fi
fi
bdw_val=
if test "x$with_target_bdw_gc_lib" != x; then
for i in `echo $with_target_bdw_gc_lib | tr ',' ' '`; do
case "$i" in
*=*) sd=${i%%=*}; d=${i#*=} ;;
*) sd=.; d=$i ;;
esac
if test "$mldir" = "$sd"; then
bdw_val=$d
fi
done
if test "x$bdw_val" = x; then
AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib])
fi
bdw_lib_dir="$bdw_val"
fi
if test "x$bdw_inc_dir" = x; then
AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-include])
fi
if test "x$bdw_lib_dir" = x; then
AC_MSG_ERROR([no multilib path ($mldir) found in --with-target-bdw-gc-lib])
fi
BDW_GC_CFLAGS="-I$bdw_inc_dir"
if test -f $bdw_lib_dir/libgc.la; then
BDW_GC_LIBS="$bdw_lib_dir/libgc.la"
else
BDW_GC_LIBS="-L$bdw_lib_dir -lgc"
fi
AC_MSG_RESULT([found])
fi
case "$BDW_GC_LIBS" in
*libgc.la)
use_bdw_gc=yes
;;
*)
AC_MSG_CHECKING([for system boehm-gc])
save_CFLAGS=$CFLAGS
save_LIBS=$LIBS
CFLAGS="$CFLAGS $BDW_GC_CFLAGS"
LIBS="$LIBS $BDW_GC_LIBS"
dnl the link test is not good enough for ARM32 multilib detection,
dnl first check to link, then to run
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([#include <gc/gc.h>],[GC_init()])],
[
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <gc/gc.h>
int main() {
GC_init();
return 0;
}
]])],
[system_bdw_gc_found=yes],
[system_bdw_gc_found=no],
dnl assume no system boehm-gc for cross builds ...
[system_bdw_gc_found=no]
)
],
[system_bdw_gc_found=no])
CFLAGS=$save_CFLAGS
LIBS=$save_LIBS
if test x$enable_objc_gc = xauto && test x$system_bdw_gc_found = xno; then
AC_MSG_WARN([system bdw-gc not found, not building libobjc_gc])
use_bdw_gc=no
elif test x$enable_objc_gc = xyes && test x$system_bdw_gc_found = xno; then
AC_MSG_ERROR([system bdw-gc required but not found])
else
use_bdw_gc=yes
AC_MSG_RESULT([found])
fi
esac
esac
if test "$use_bdw_gc" = no; then
OBJC_GCFLAGS=''
OBJC_BOEHM_GC=''
OBJC_BOEHM_GC_INCLUDES=''
OBJC_BOEHM_GC_LIBS=''
else
OBJC_GCFLAGS='-DOBJC_WITH_GC=1'
OBJC_BOEHM_GC='libobjc_gc$(libsuffix).la'
OBJC_BOEHM_GC_INCLUDES=$BDW_GC_CFLAGS
OBJC_BOEHM_GC_LIBS=$BDW_GC_LIBS
fi
AC_SUBST(OBJC_GCFLAGS)
AC_SUBST(OBJC_BOEHM_GC)
AC_SUBST(OBJC_BOEHM_GC_INCLUDES)
AC_SUBST(OBJC_BOEHM_GC_LIBS)
# Determine what GCC version number to use in filesystem paths.
GCC_BASE_VER
# ------
# Output
# ------
if test ${multilib} = yes; then
multilib_arg="--enable-multilib"
else
multilib_arg=
fi
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
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