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4c0315d0 | 1 | # Process this file with autoreconf to produce a configure script. |
fbd26352 | 2 | # Copyright (C) 2011-2019 Free Software Foundation, Inc. |
4c0315d0 | 3 | |
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. | |
8 | # | |
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. | |
13 | # | |
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. | |
17 | ||
4c0315d0 | 18 | AC_INIT([GNU TM Runtime Library], 1.0,,[libitm]) |
19 | AC_CONFIG_HEADER(config.h) | |
20 | ||
21 | # ------- | |
22 | # Options | |
23 | # ------- | |
24 | ||
25 | AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) | |
26 | LIBITM_ENABLE(version-specific-runtime-libs, no, , | |
27 | [Specify that runtime libraries should be installed in a compiler-specific directory], | |
28 | permit yes|no) | |
29 | AC_MSG_RESULT($enable_version_specific_runtime_libs) | |
30 | ||
31 | # We would like our source tree to be readonly. However when releases or | |
32 | # pre-releases are generated, the flex/bison generated files as well as the | |
33 | # various formats of manuals need to be included along with the rest of the | |
34 | # sources. Therefore we have --enable-generated-files-in-srcdir to do | |
35 | # just that. | |
36 | AC_MSG_CHECKING([for --enable-generated-files-in-srcdir]) | |
37 | LIBITM_ENABLE(generated-files-in-srcdir, no, , | |
38 | [put copies of generated files in source dir intended for creating source | |
39 | tarballs for users without texinfo bison or flex.], | |
40 | permit yes|no) | |
41 | AC_MSG_RESULT($enable_generated_files_in_srcdir) | |
42 | AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes) | |
43 | ||
44 | ||
45 | # ------- | |
46 | # ------- | |
47 | ||
48 | # Gets build, host, target, *_vendor, *_cpu, *_os, etc. | |
49 | # | |
50 | # You will slowly go insane if you do not grok the following fact: when | |
51 | # building this library, the top-level /target/ becomes the library's /host/. | |
52 | # | |
53 | # configure then causes --target to default to --host, exactly like any | |
54 | # other package using autoconf. Therefore, 'target' and 'host' will | |
55 | # always be the same. This makes sense both for native and cross compilers | |
56 | # just think about it for a little while. :-) | |
57 | # | |
58 | # Also, if this library is being configured as part of a cross compiler, the | |
59 | # top-level configure script will pass the "real" host as $with_cross_host. | |
60 | # | |
61 | # Do not delete or change the following two lines. For why, see | |
62 | # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html | |
63 | AC_CANONICAL_SYSTEM | |
64 | target_alias=${target_alias-$host_alias} | |
65 | ||
66 | # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the | |
67 | # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am. | |
68 | # 1.9.0: minimum required version | |
69 | # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch | |
70 | # of other PACKAGE_* variables will, however, and there's nothing | |
71 | # we can do about that; they come from AC_INIT). | |
6f65c697 | 72 | # no-dist: we don't want 'dist' and related rules. |
4c0315d0 | 73 | # foreign: we don't follow the normal rules for GNU packages (no COPYING |
74 | # file in the top srcdir, etc, etc), so stop complaining. | |
75 | # -Wall: turns on all automake warnings... | |
76 | # -Wno-portability: ...except this one, since GNU make is required. | |
77 | # -Wno-override: ... and this one, since we do want this in testsuite. | |
6f65c697 | 78 | AM_INIT_AUTOMAKE([1.9.0 foreign no-dist -Wall -Wno-portability -Wno-override]) |
4c0315d0 | 79 | AM_ENABLE_MULTILIB(, ..) |
80 | ||
81 | # Calculate toolexeclibdir | |
82 | # Also toolexecdir, though it's only used in toolexeclibdir | |
83 | case ${enable_version_specific_runtime_libs} in | |
84 | yes) | |
85 | # Need the gcc compiler version to know where to install libraries | |
86 | # and header files if --enable-version-specific-runtime-libs option | |
87 | # is selected. | |
88 | toolexecdir='$(libdir)/gcc/$(target_alias)' | |
89 | toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)' | |
90 | ;; | |
91 | no) | |
92 | if test -n "$with_cross_host" && | |
93 | test x"$with_cross_host" != x"no"; then | |
94 | # Install a library built with a cross compiler in tooldir, not libdir. | |
95 | toolexecdir='$(exec_prefix)/$(target_alias)' | |
96 | toolexeclibdir='$(toolexecdir)/lib' | |
97 | else | |
98 | toolexecdir='$(libdir)/gcc-lib/$(target_alias)' | |
99 | toolexeclibdir='$(libdir)' | |
100 | fi | |
101 | multi_os_directory=`$CC -print-multi-os-directory` | |
102 | case $multi_os_directory in | |
103 | .) ;; # Avoid trailing /. | |
104 | *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; | |
105 | esac | |
106 | ;; | |
107 | esac | |
108 | AC_SUBST(toolexecdir) | |
109 | AC_SUBST(toolexeclibdir) | |
110 | ||
111 | # Check the compiler. | |
112 | # The same as in boehm-gc and libstdc++. Have to borrow it from there. | |
113 | # We must force CC to /not/ be precious variables; otherwise | |
114 | # the wrong, non-multilib-adjusted value will be used in multilibs. | |
115 | # As a side effect, we have to subst CFLAGS ourselves. | |
116 | ||
117 | m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) | |
118 | m4_define([_AC_ARG_VAR_PRECIOUS],[]) | |
119 | AC_PROG_CC | |
120 | AC_PROG_CXX | |
121 | AM_PROG_AS | |
122 | m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) | |
123 | ||
124 | AC_SUBST(CFLAGS) | |
125 | ||
126 | # In order to override CFLAGS_FOR_TARGET, all of our special flags go | |
127 | # in XCFLAGS. But we need them in CFLAGS during configury. So put them | |
128 | # in both places for now and restore CFLAGS at the end of config. | |
129 | save_CFLAGS="$CFLAGS" | |
130 | ||
131 | # Find other programs we need. | |
132 | AC_CHECK_TOOL(AR, ar) | |
133 | AC_CHECK_TOOL(NM, nm) | |
134 | AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) | |
135 | AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error) | |
136 | AC_PROG_MAKE_SET | |
137 | AC_PROG_INSTALL | |
138 | ||
139 | # See if makeinfo has been installed and is modern enough | |
140 | # that we can use it. | |
141 | ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version], | |
142 | [GNU texinfo.* \([0-9][0-9.]*\)], | |
143 | [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*]) | |
144 | AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes") | |
145 | ||
146 | ||
147 | # Configure libtool | |
148 | AM_PROG_LIBTOOL | |
149 | AC_SUBST(enable_shared) | |
150 | AC_SUBST(enable_static) | |
151 | ||
152 | AM_MAINTAINER_MODE | |
153 | ||
154 | # For libtool versioning info, format is CURRENT:REVISION:AGE | |
155 | libtool_VERSION=1:0:0 | |
156 | AC_SUBST(libtool_VERSION) | |
157 | ||
158 | # Check header files. | |
159 | AC_STDC_HEADERS | |
160 | AC_HEADER_TIME | |
161 | ACX_HEADER_STRING | |
5088e479 | 162 | AC_CHECK_HEADERS(unistd.h semaphore.h sys/time.h sys/auxv.h malloc.h) |
4c0315d0 | 163 | |
164 | GCC_HEADER_STDINT(gstdint.h) | |
165 | ||
166 | GCC_AC_FUNC_MMAP_BLACKLIST | |
167 | ||
168 | AC_C_BIGENDIAN | |
169 | # I don't like the default behaviour of WORDS_BIGENDIAN undefined for LE. | |
170 | AH_BOTTOM( | |
171 | [#ifndef WORDS_BIGENDIAN | |
172 | #define WORDS_BIGENDIAN 0 | |
173 | #endif]) | |
174 | ||
175 | # Check to see if -pthread or -lpthread is needed. Prefer the former. | |
176 | # In case the pthread.h system header is not found, this test will fail. | |
177 | XPCFLAGS="" | |
178 | CFLAGS="$CFLAGS -pthread" | |
179 | AC_LINK_IFELSE( | |
180 | [AC_LANG_PROGRAM( | |
181 | [#include <pthread.h> | |
182 | void *g(void *d) { return NULL; }], | |
183 | [pthread_t t; pthread_create(&t,NULL,g,NULL);])], | |
184 | [XPCFLAGS=" -Wc,-pthread"], | |
185 | [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS" | |
186 | AC_LINK_IFELSE( | |
187 | [AC_LANG_PROGRAM( | |
188 | [#include <pthread.h> | |
189 | void *g(void *d) { return NULL; }], | |
190 | [pthread_t t; pthread_create(&t,NULL,g,NULL);])], | |
191 | [], | |
192 | [AC_MSG_ERROR([Pthreads are required to build libitm])])]) | |
193 | ||
194 | # Check for functions needed. | |
5088e479 | 195 | AC_CHECK_FUNCS(strtoull memalign posix_memalign getauxval) |
4c0315d0 | 196 | |
197 | # Check for broken semaphore implementation on darwin. | |
198 | # sem_init returns: sem_init error: Function not implemented. | |
199 | case "$host" in | |
200 | *-darwin*) | |
201 | AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1, | |
202 | Define if the POSIX Semaphores do not work on your system.) | |
203 | ;; | |
204 | esac | |
205 | ||
206 | GCC_LINUX_FUTEX(:) | |
207 | ||
208 | # See if we support thread-local storage. | |
209 | GCC_CHECK_TLS | |
210 | ||
dffe2d19 | 211 | # See what sort of export controls are available. |
4c0315d0 | 212 | LIBITM_CHECK_ATTRIBUTE_VISIBILITY |
213 | LIBITM_CHECK_ATTRIBUTE_DLLEXPORT | |
214 | LIBITM_CHECK_ATTRIBUTE_ALIAS | |
4c0315d0 | 215 | |
dffe2d19 | 216 | # Check linker hardware capability support. |
18ce903b | 217 | GCC_CHECK_LINKER_HWCAP |
dffe2d19 | 218 | # If defaulting to -mavx, don't clear hwcaps. |
219 | AC_CHECK_DECL([__AVX__], [HWCAP_LDFLAGS='']) | |
220 | ||
221 | LIBITM_ENABLE_SYMVERS | |
4c0315d0 | 222 | if test $enable_symvers = gnu; then |
223 | AC_DEFINE(LIBITM_GNU_SYMBOL_VERSIONING, 1, | |
224 | [Define to 1 if GNU symbol versioning is used for libitm.]) | |
225 | fi | |
226 | ||
67ba1f57 | 227 | # See if we can emit unwind info in the sjlj stub. |
228 | GCC_AS_CFI_PSEUDO_OP | |
229 | ||
4c0315d0 | 230 | # Determine the proper ABI type for size_t. |
231 | LIBITM_CHECK_SIZE_T_MANGLING | |
232 | ||
233 | # Get target configury. | |
234 | . ${srcdir}/configure.tgt | |
298c66d9 | 235 | if test -n "$UNSUPPORTED"; then |
236 | AC_MSG_ERROR([Configuration ${target} is unsupported.]) | |
237 | fi | |
238 | ||
4c0315d0 | 239 | CFLAGS="$save_CFLAGS $XCFLAGS" |
240 | ||
241 | # Check for __sync_val_compare_and_swap, but only after the target has | |
242 | # had a chance to set XCFLAGS. | |
243 | LIBITM_CHECK_SYNC_BUILTINS | |
244 | LIBITM_CHECK_64BIT_SYNC_BUILTINS | |
36a0e17a | 245 | LIBITM_CHECK_AS_AVX |
ca09a9c4 | 246 | LIBITM_CHECK_AS_RTM |
5088e479 | 247 | LIBITM_CHECK_AS_HTM |
4c0315d0 | 248 | |
07acf712 | 249 | GCC_CHECK_ELF_STYLE_WEAKREF |
250 | ||
4c0315d0 | 251 | # Cleanup and exit. |
252 | CFLAGS="$save_CFLAGS" | |
253 | AC_CACHE_SAVE | |
254 | ||
255 | # Add -Wall -Werror if we are using GCC. | |
256 | if test "x$GCC" = "xyes"; then | |
257 | XCFLAGS="$XCFLAGS -Wall -Werror" | |
258 | fi | |
259 | ||
260 | XCFLAGS="$XCFLAGS $XPCFLAGS" | |
261 | ||
18b93198 | 262 | # Add CET specific flags if CET is enabled |
263 | GCC_CET_FLAGS(CET_FLAGS) | |
264 | XCFLAGS="$XCFLAGS $CET_FLAGS" | |
265 | ||
4c0315d0 | 266 | AC_SUBST(config_path) |
267 | AC_SUBST(XCFLAGS) | |
268 | AC_SUBST(XLDFLAGS) | |
269 | ||
270 | if test ${multilib} = yes; then | |
271 | multilib_arg="--enable-multilib" | |
272 | else | |
273 | multilib_arg= | |
274 | fi | |
275 | ||
276 | # Set up the set of libraries that we need to link against for libitm. | |
9a8d01ee | 277 | # Note that the GTM_SELF_SPECS in gcc.c will force -pthread for -fgnu-tm, |
4c0315d0 | 278 | # which will force linkage against -lpthread (or equivalent for the system). |
279 | # That's not 100% ideal, but about the best we can do easily. | |
280 | if test $enable_shared = yes; then | |
281 | link_itm="-litm %{static: $LIBS}" | |
282 | else | |
283 | link_itm="-litm $LIBS" | |
284 | fi | |
285 | AC_SUBST(link_itm) | |
286 | ||
dd120a97 | 287 | AM_CONDITIONAL([ARCH_ARM], [test "$ARCH" = arm]) |
4c0315d0 | 288 | AM_CONDITIONAL([ARCH_X86], [test "$ARCH" = x86]) |
b8190fde | 289 | AM_CONDITIONAL([ARCH_X86_AVX], [test "$libitm_cv_as_avx" = yes]) |
4c0315d0 | 290 | AM_CONDITIONAL([ARCH_FUTEX], [test $enable_linux_futex = yes]) |
291 | ||
0812bb06 | 292 | # Determine what GCC version number to use in filesystem paths. |
293 | GCC_BASE_VER | |
294 | ||
4c0315d0 | 295 | AC_CONFIG_FILES(Makefile testsuite/Makefile libitm.spec) |
296 | AC_OUTPUT |