111
|
1 # Process this file with autoreconf to produce a configure script.
|
131
|
2 # Copyright (C) 2012-2018 Free Software Foundation, Inc.
|
111
|
3 #
|
|
4 # This file is part of the GNU Atomic Library (libatomic).
|
|
5 #
|
|
6 # Libatomic is free software; you can redistribute it and/or modify it
|
|
7 # under the terms of the GNU General Public License as published by
|
|
8 # the Free Software Foundation; either version 3 of the License, or
|
|
9 # (at your option) any later version.
|
|
10 #
|
|
11 # Libatomic is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
12 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
13 # FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
14 # more details.
|
|
15 #
|
|
16 # Under Section 7 of GPL version 3, you are granted additional
|
|
17 # permissions described in the GCC Runtime Library Exception, version
|
|
18 # 3.1, as published by the Free Software Foundation.
|
|
19 #
|
|
20 # You should have received a copy of the GNU General Public License and
|
|
21 # a copy of the GCC Runtime Library Exception along with this program;
|
|
22 # see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
23 # <http://www.gnu.org/licenses/>.
|
|
24
|
|
25 AC_PREREQ(2.59)
|
|
26 AC_INIT([GNU Atomic Library], 1.0,,[libatomic])
|
|
27 AC_CONFIG_HEADER(auto-config.h)
|
|
28
|
|
29 # -------
|
|
30 # Options
|
|
31 # -------
|
|
32
|
|
33 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
|
|
34 LIBAT_ENABLE(version-specific-runtime-libs, no, ,
|
|
35 [Specify that runtime libraries should be installed in a compiler-specific directory],
|
|
36 permit yes|no)
|
|
37 AC_MSG_RESULT($enable_version_specific_runtime_libs)
|
|
38
|
|
39 # We would like our source tree to be readonly. However when releases or
|
|
40 # pre-releases are generated, the flex/bison generated files as well as the
|
|
41 # various formats of manuals need to be included along with the rest of the
|
|
42 # sources. Therefore we have --enable-generated-files-in-srcdir to do
|
|
43 # just that.
|
|
44 AC_MSG_CHECKING([for --enable-generated-files-in-srcdir])
|
|
45 LIBAT_ENABLE(generated-files-in-srcdir, no, ,
|
|
46 [put copies of generated files in source dir intended for creating source
|
|
47 tarballs for users without texinfo bison or flex.],
|
|
48 permit yes|no)
|
|
49 AC_MSG_RESULT($enable_generated_files_in_srcdir)
|
|
50 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
|
|
51
|
|
52
|
|
53 # -------
|
|
54
|
|
55 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
|
|
56 #
|
|
57 # You will slowly go insane if you do not grok the following fact: when
|
|
58 # building this library, the top-level /target/ becomes the library's /host/.
|
|
59 #
|
|
60 # configure then causes --target to default to --host, exactly like any
|
|
61 # other package using autoconf. Therefore, 'target' and 'host' will
|
|
62 # always be the same. This makes sense both for native and cross compilers
|
|
63 # just think about it for a little while. :-)
|
|
64 #
|
|
65 # Also, if this library is being configured as part of a cross compiler, the
|
|
66 # top-level configure script will pass the "real" host as $with_cross_host.
|
|
67 #
|
|
68 # Do not delete or change the following two lines. For why, see
|
|
69 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
|
|
70 AC_CANONICAL_SYSTEM
|
|
71 target_alias=${target_alias-$host_alias}
|
|
72
|
|
73 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
|
|
74 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
|
|
75 # 1.9.0: minimum required version
|
|
76 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
|
|
77 # of other PACKAGE_* variables will, however, and there's nothing
|
|
78 # we can do about that; they come from AC_INIT).
|
|
79 # no-dist: we don't want 'dist' and related rules.
|
|
80 # foreign: we don't follow the normal rules for GNU packages (no COPYING
|
|
81 # file in the top srcdir, etc, etc), so stop complaining.
|
|
82 # -Wall: turns on all automake warnings...
|
|
83 # -Wno-portability: ...except this one, since GNU make is required.
|
|
84 # -Wno-override: ... and this one, since we do want this in testsuite.
|
|
85 AM_INIT_AUTOMAKE([1.9.0 foreign no-dist -Wall -Wno-portability -Wno-override])
|
|
86 AM_ENABLE_MULTILIB(, ..)
|
|
87
|
|
88 # Calculate toolexeclibdir
|
|
89 # Also toolexecdir, though it's only used in toolexeclibdir
|
|
90 case ${enable_version_specific_runtime_libs} in
|
|
91 yes)
|
|
92 # Need the gcc compiler version to know where to install libraries
|
|
93 # and header files if --enable-version-specific-runtime-libs option
|
|
94 # is selected.
|
|
95 toolexecdir='$(libdir)/gcc/$(target_alias)'
|
|
96 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
|
|
97 ;;
|
|
98 no)
|
|
99 if test -n "$with_cross_host" &&
|
|
100 test x"$with_cross_host" != x"no"; then
|
|
101 # Install a library built with a cross compiler in tooldir, not libdir.
|
|
102 toolexecdir='$(exec_prefix)/$(target_alias)'
|
|
103 toolexeclibdir='$(toolexecdir)/lib'
|
|
104 else
|
|
105 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
|
|
106 toolexeclibdir='$(libdir)'
|
|
107 fi
|
|
108 multi_os_directory=`$CC -print-multi-os-directory`
|
|
109 case $multi_os_directory in
|
|
110 .) ;; # Avoid trailing /.
|
|
111 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
|
|
112 esac
|
|
113 ;;
|
|
114 esac
|
|
115 AC_SUBST(toolexecdir)
|
|
116 AC_SUBST(toolexeclibdir)
|
|
117
|
|
118 # Check the compiler.
|
|
119 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
|
|
120 # We must force CC to /not/ be precious variables; otherwise
|
|
121 # the wrong, non-multilib-adjusted value will be used in multilibs.
|
|
122 # As a side effect, we have to subst CFLAGS ourselves.
|
|
123
|
|
124 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
|
|
125 m4_define([_AC_ARG_VAR_PRECIOUS],[])
|
|
126 AC_PROG_CC
|
|
127 AM_PROG_AS
|
|
128 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
|
|
129
|
|
130 AC_SUBST(CFLAGS)
|
|
131
|
|
132 # In order to override CFLAGS_FOR_TARGET, all of our special flags go
|
|
133 # in XCFLAGS. But we need them in CFLAGS during configury. So put them
|
|
134 # in both places for now and restore CFLAGS at the end of config.
|
|
135 save_CFLAGS="$CFLAGS"
|
|
136
|
|
137 # Find other programs we need.
|
|
138 AC_CHECK_TOOL(AR, ar)
|
|
139 AC_CHECK_TOOL(NM, nm)
|
|
140 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
|
|
141 AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error)
|
|
142 AC_PROG_INSTALL
|
|
143
|
|
144 # Configure libtool
|
|
145 AM_PROG_LIBTOOL
|
|
146 ACX_LT_HOST_FLAGS
|
|
147 AC_SUBST(enable_shared)
|
|
148 AC_SUBST(enable_static)
|
|
149 AM_MAINTAINER_MODE
|
|
150
|
|
151 # For libtool versioning info, format is CURRENT:REVISION:AGE
|
|
152 libtool_VERSION=3:0:2
|
|
153 AC_SUBST(libtool_VERSION)
|
|
154
|
|
155 # Check for used threading-model
|
|
156 AC_MSG_CHECKING([for thread model used by GCC])
|
|
157 target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`
|
|
158 AC_MSG_RESULT([$target_thread_file])
|
|
159
|
131
|
160 case "$target" in
|
|
161 *aarch64*)
|
|
162 ACX_PROG_CC_WARNING_OPTS([-march=armv8-a+lse],[enable_aarch64_lse])
|
|
163 ;;
|
|
164 esac
|
|
165
|
111
|
166 # Get target configury.
|
|
167 . ${srcdir}/configure.tgt
|
|
168 if test -n "$UNSUPPORTED"; then
|
|
169 AC_MSG_ERROR([Configuration ${target} is unsupported.])
|
|
170 fi
|
|
171
|
131
|
172 # Write out the ifunc resolver arg type.
|
|
173 AC_DEFINE_UNQUOTED(IFUNC_RESOLVER_ARGS, $IFUNC_RESOLVER_ARGS,
|
|
174 [Define ifunc resolver function argument.])
|
|
175
|
111
|
176 # Disable fallbacks to __sync routines from libgcc. Otherwise we'll
|
|
177 # make silly decisions about what the cpu can do.
|
|
178 CFLAGS="$save_CFLAGS -fno-sync-libcalls $XCFLAGS"
|
|
179
|
|
180 # Check header files.
|
|
181 AC_STDC_HEADERS
|
|
182 ACX_HEADER_STRING
|
|
183 GCC_HEADER_STDINT(gstdint.h)
|
|
184 AC_CHECK_HEADERS([fenv.h])
|
|
185
|
|
186 # Check for common type sizes
|
|
187 LIBAT_FORALL_MODES([LIBAT_HAVE_INT_MODE])
|
|
188
|
|
189 # Check for compiler builtins of atomic operations.
|
|
190 LIBAT_TEST_ATOMIC_INIT
|
|
191 LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_LOADSTORE])
|
|
192 LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_TAS])
|
|
193 LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_EXCHANGE])
|
|
194 LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_CAS])
|
|
195 LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_FETCH_ADD])
|
|
196 LIBAT_FORALL_MODES([LIBAT_HAVE_ATOMIC_FETCH_OP])
|
|
197
|
|
198 AC_C_BIGENDIAN
|
|
199 # I don't like the default behaviour of WORDS_BIGENDIAN undefined for LE.
|
|
200 AH_BOTTOM(
|
|
201 [#ifndef WORDS_BIGENDIAN
|
|
202 #define WORDS_BIGENDIAN 0
|
|
203 #endif])
|
|
204
|
|
205 LIBAT_WORDSIZE
|
|
206
|
|
207 # Check to see if -pthread or -lpthread is needed. Prefer the former.
|
|
208 # In case the pthread.h system header is not found, this test will fail.
|
|
209 case " $config_path " in
|
|
210 *" posix "*)
|
|
211 XPCFLAGS=""
|
|
212 CFLAGS="$CFLAGS -pthread"
|
|
213 AC_LINK_IFELSE(
|
|
214 [AC_LANG_PROGRAM(
|
|
215 [#include <pthread.h>
|
|
216 void *g(void *d) { return NULL; }],
|
|
217 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
|
|
218 [XPCFLAGS=" -pthread"],
|
|
219 [CFLAGS="$save_CFLAGS $XCFLAGS" LIBS="-lpthread $LIBS"
|
|
220 AC_LINK_IFELSE(
|
|
221 [AC_LANG_PROGRAM(
|
|
222 [#include <pthread.h>
|
|
223 void *g(void *d) { return NULL; }],
|
|
224 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
|
|
225 [],
|
|
226 [AC_MSG_ERROR([Pthreads are required to build libatomic])])])
|
|
227 CFLAGS="$save_CFLAGS $XPCFLAGS"
|
|
228 ;;
|
|
229 esac
|
|
230
|
|
231 # See what sort of export controls are available.
|
|
232 LIBAT_CHECK_ATTRIBUTE_VISIBILITY
|
|
233 LIBAT_CHECK_ATTRIBUTE_DLLEXPORT
|
|
234 LIBAT_CHECK_ATTRIBUTE_ALIAS
|
|
235 if test x$try_ifunc = xyes; then
|
|
236 LIBAT_CHECK_IFUNC
|
|
237 fi
|
|
238
|
|
239 # Check linker support.
|
|
240 LIBAT_ENABLE_SYMVERS
|
|
241
|
|
242 # Cleanup and exit.
|
|
243 CFLAGS="$save_CFLAGS"
|
|
244 AC_CACHE_SAVE
|
|
245
|
|
246 # Add -Wall -Werror if we are using GCC.
|
|
247 if test "x$GCC" = "xyes"; then
|
|
248 XCFLAGS="$XCFLAGS -Wall -Werror"
|
|
249 fi
|
|
250
|
131
|
251 # Add CET specific flags if CET is enabled
|
|
252 GCC_CET_FLAGS(CET_FLAGS)
|
|
253 XCFLAGS="$XCFLAGS $CET_FLAGS"
|
|
254
|
111
|
255 XCFLAGS="$XCFLAGS $XPCFLAGS"
|
|
256
|
|
257 AC_SUBST(config_path)
|
|
258 AC_SUBST(XCFLAGS)
|
|
259 AC_SUBST(XLDFLAGS)
|
|
260 AC_SUBST(LIBS)
|
|
261 AC_SUBST(SIZES)
|
|
262
|
|
263 AM_CONDITIONAL(HAVE_IFUNC, test x$libat_cv_have_ifunc = xyes)
|
131
|
264 AM_CONDITIONAL(ARCH_AARCH64_LINUX,
|
|
265 [expr "$config_path" : ".* linux/aarch64 .*" > /dev/null])
|
111
|
266 AM_CONDITIONAL(ARCH_ARM_LINUX,
|
|
267 [expr "$config_path" : ".* linux/arm .*" > /dev/null])
|
|
268 AM_CONDITIONAL(ARCH_I386,
|
|
269 [test "$ARCH" = x86 && test x$libat_cv_wordsize = x4])
|
|
270 AM_CONDITIONAL(ARCH_X86_64,
|
|
271 [test "$ARCH" = x86 && test x$libat_cv_wordsize = x8])
|
|
272
|
|
273 # Determine what GCC version number to use in filesystem paths.
|
|
274 GCC_BASE_VER
|
|
275
|
|
276 if test ${multilib} = yes; then
|
|
277 multilib_arg="--enable-multilib"
|
|
278 else
|
|
279 multilib_arg=
|
|
280 fi
|
|
281
|
|
282 AC_CONFIG_FILES(Makefile testsuite/Makefile)
|
|
283 AC_OUTPUT
|