1 # Process this file with autoreconf to produce a configure script.
2 # Copyright (C) 2011-2017 Free Software Foundation, Inc.
4 # This program is free software; you can redistribute it and/or modify
5 # it under the terms of the GNU General Public License as published by
6 # the Free Software Foundation; either version 2 of the License, or
7 # (at your option) any later version.
9 # This program is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 # GNU General Public License for more details.
14 # You should have received a copy of the GNU General Public License
15 # along with this program; if not, write to the Free Software
16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 AC_INIT([GNU TM Runtime Library], 1.0,,[libitm])
20 AC_CONFIG_HEADER(config.h)
26 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
27 LIBITM_ENABLE(version-specific-runtime-libs, no, ,
28 [Specify that runtime libraries should be installed in a compiler-specific directory],
30 AC_MSG_RESULT($enable_version_specific_runtime_libs)
32 # We would like our source tree to be readonly. However when releases or
33 # pre-releases are generated, the flex/bison generated files as well as the
34 # various formats of manuals need to be included along with the rest of the
35 # sources. Therefore we have --enable-generated-files-in-srcdir to do
37 AC_MSG_CHECKING([for --enable-generated-files-in-srcdir])
38 LIBITM_ENABLE(generated-files-in-srcdir, no, ,
39 [put copies of generated files in source dir intended for creating source
40 tarballs for users without texinfo bison or flex.],
42 AC_MSG_RESULT($enable_generated_files_in_srcdir)
43 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
49 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
51 # You will slowly go insane if you do not grok the following fact: when
52 # building this library, the top-level /target/ becomes the library's /host/.
54 # configure then causes --target to default to --host, exactly like any
55 # other package using autoconf. Therefore, 'target' and 'host' will
56 # always be the same. This makes sense both for native and cross compilers
57 # just think about it for a little while. :-)
59 # Also, if this library is being configured as part of a cross compiler, the
60 # top-level configure script will pass the "real" host as $with_cross_host.
62 # Do not delete or change the following two lines. For why, see
63 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
65 target_alias=${target_alias-$host_alias}
67 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
68 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
69 # 1.9.0: minimum required version
70 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
71 # of other PACKAGE_* variables will, however, and there's nothing
72 # we can do about that; they come from AC_INIT).
73 # no-dist: we don't want 'dist' and related rules.
74 # foreign: we don't follow the normal rules for GNU packages (no COPYING
75 # file in the top srcdir, etc, etc), so stop complaining.
76 # -Wall: turns on all automake warnings...
77 # -Wno-portability: ...except this one, since GNU make is required.
78 # -Wno-override: ... and this one, since we do want this in testsuite.
79 AM_INIT_AUTOMAKE([1.9.0 foreign no-dist -Wall -Wno-portability -Wno-override])
80 AM_ENABLE_MULTILIB(, ..)
82 # Calculate toolexeclibdir
83 # Also toolexecdir, though it's only used in toolexeclibdir
84 case ${enable_version_specific_runtime_libs} in
86 # Need the gcc compiler version to know where to install libraries
87 # and header files if --enable-version-specific-runtime-libs option
89 toolexecdir='$(libdir)/gcc/$(target_alias)'
90 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
93 if test -n "$with_cross_host" &&
94 test x"$with_cross_host" != x"no"; then
95 # Install a library built with a cross compiler in tooldir, not libdir.
96 toolexecdir='$(exec_prefix)/$(target_alias)'
97 toolexeclibdir='$(toolexecdir)/lib'
99 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
100 toolexeclibdir='$(libdir)'
102 multi_os_directory=`$CC -print-multi-os-directory`
103 case $multi_os_directory in
104 .) ;; # Avoid trailing /.
105 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
109 AC_SUBST(toolexecdir)
110 AC_SUBST(toolexeclibdir)
112 # Check the compiler.
113 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
114 # We must force CC to /not/ be precious variables; otherwise
115 # the wrong, non-multilib-adjusted value will be used in multilibs.
116 # As a side effect, we have to subst CFLAGS ourselves.
118 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
119 m4_define([_AC_ARG_VAR_PRECIOUS],[])
123 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
127 # In order to override CFLAGS_FOR_TARGET, all of our special flags go
128 # in XCFLAGS. But we need them in CFLAGS during configury. So put them
129 # in both places for now and restore CFLAGS at the end of config.
130 save_CFLAGS="$CFLAGS"
132 # Find other programs we need.
133 AC_CHECK_TOOL(AR, ar)
134 AC_CHECK_TOOL(NM, nm)
135 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
136 AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error)
140 # See if makeinfo has been installed and is modern enough
141 # that we can use it.
142 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
143 [GNU texinfo.* \([0-9][0-9.]*\)],
144 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
145 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
150 AC_SUBST(enable_shared)
151 AC_SUBST(enable_static)
155 # For libtool versioning info, format is CURRENT:REVISION:AGE
156 libtool_VERSION=1:0:0
157 AC_SUBST(libtool_VERSION)
159 # Check header files.
163 AC_CHECK_HEADERS(unistd.h semaphore.h sys/time.h sys/auxv.h malloc.h)
165 GCC_HEADER_STDINT(gstdint.h)
167 GCC_AC_FUNC_MMAP_BLACKLIST
170 # I don't like the default behaviour of WORDS_BIGENDIAN undefined for LE.
172 [#ifndef WORDS_BIGENDIAN
173 #define WORDS_BIGENDIAN 0
176 # Check to see if -pthread or -lpthread is needed. Prefer the former.
177 # In case the pthread.h system header is not found, this test will fail.
179 CFLAGS="$CFLAGS -pthread"
182 [#include <pthread.h>
183 void *g(void *d) { return NULL; }],
184 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
185 [XPCFLAGS=" -Wc,-pthread"],
186 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
189 [#include <pthread.h>
190 void *g(void *d) { return NULL; }],
191 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
193 [AC_MSG_ERROR([Pthreads are required to build libitm])])])
195 # Check for functions needed.
196 AC_CHECK_FUNCS(strtoull memalign posix_memalign getauxval)
198 # Check for broken semaphore implementation on darwin.
199 # sem_init returns: sem_init error: Function not implemented.
202 AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
203 Define if the POSIX Semaphores do not work on your system.)
209 # See if we support thread-local storage.
212 # See what sort of export controls are available.
213 LIBITM_CHECK_ATTRIBUTE_VISIBILITY
214 LIBITM_CHECK_ATTRIBUTE_DLLEXPORT
215 LIBITM_CHECK_ATTRIBUTE_ALIAS
217 # Check linker hardware capability support.
218 GCC_CHECK_LINKER_HWCAP
219 # If defaulting to -mavx, don't clear hwcaps.
220 AC_CHECK_DECL([__AVX__], [HWCAP_LDFLAGS=''])
222 LIBITM_ENABLE_SYMVERS
223 if test $enable_symvers = gnu; then
224 AC_DEFINE(LIBITM_GNU_SYMBOL_VERSIONING, 1,
225 [Define to 1 if GNU symbol versioning is used for libitm.])
228 # See if we can emit unwind info in the sjlj stub.
231 # Determine the proper ABI type for size_t.
232 LIBITM_CHECK_SIZE_T_MANGLING
234 # Get target configury.
235 . ${srcdir}/configure.tgt
236 if test -n "$UNSUPPORTED"; then
237 AC_MSG_ERROR([Configuration ${target} is unsupported.])
240 CFLAGS="$save_CFLAGS $XCFLAGS"
242 # Check for __sync_val_compare_and_swap, but only after the target has
243 # had a chance to set XCFLAGS.
244 LIBITM_CHECK_SYNC_BUILTINS
245 LIBITM_CHECK_64BIT_SYNC_BUILTINS
250 GCC_CHECK_ELF_STYLE_WEAKREF
253 CFLAGS="$save_CFLAGS"
256 # Add -Wall -Werror if we are using GCC.
257 if test "x$GCC" = "xyes"; then
258 XCFLAGS="$XCFLAGS -Wall -Werror"
261 XCFLAGS="$XCFLAGS $XPCFLAGS"
263 AC_SUBST(config_path)
267 if test ${multilib} = yes; then
268 multilib_arg="--enable-multilib"
273 # Set up the set of libraries that we need to link against for libitm.
274 # Note that the GTM_SELF_SPECS in gcc.c will force -pthread for -fgnu-tm,
275 # which will force linkage against -lpthread (or equivalent for the system).
276 # That's not 100% ideal, but about the best we can do easily.
277 if test $enable_shared = yes; then
278 link_itm="-litm %{static: $LIBS}"
280 link_itm="-litm $LIBS"
284 AM_CONDITIONAL([ARCH_ARM], [test "$ARCH" = arm])
285 AM_CONDITIONAL([ARCH_X86], [test "$ARCH" = x86])
286 AM_CONDITIONAL([ARCH_X86_AVX], [test "$libitm_cv_as_avx" = yes])
287 AM_CONDITIONAL([ARCH_FUTEX], [test $enable_linux_futex = yes])
289 # Determine what GCC version number to use in filesystem paths.
292 AC_CONFIG_FILES(Makefile testsuite/Makefile libitm.spec)