1# Process this file with autoreconf to produce a configure script. 2# Copyright (C) 2011-2019 Free Software Foundation, Inc. 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 18AC_INIT([GNU TM Runtime Library], 1.0,,[libitm]) 19AC_CONFIG_HEADER(config.h) 20 21# ------- 22# Options 23# ------- 24 25AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) 26LIBITM_ENABLE(version-specific-runtime-libs, no, , 27 [Specify that runtime libraries should be installed in a compiler-specific directory], 28 permit yes|no) 29AC_MSG_RESULT($enable_version_specific_runtime_libs) 30 31# We would like our source tree to be readonly. However when releases or 32# pre-releases are generated, the flex/bison generated files as well as the 33# various formats of manuals need to be included along with the rest of the 34# sources. Therefore we have --enable-generated-files-in-srcdir to do 35# just that. 36AC_MSG_CHECKING([for --enable-generated-files-in-srcdir]) 37LIBITM_ENABLE(generated-files-in-srcdir, no, , 38 [put copies of generated files in source dir intended for creating source 39 tarballs for users without texinfo bison or flex.], 40 permit yes|no) 41AC_MSG_RESULT($enable_generated_files_in_srcdir) 42AM_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 $with_cross_host. 60# 61# Do not delete or change the following two lines. For why, see 62# http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html 63AC_CANONICAL_SYSTEM 64target_alias=${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). 72# no-dist: we don't want 'dist' and related rules. 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. 78AM_INIT_AUTOMAKE([1.9.0 foreign no-dist -Wall -Wno-portability -Wno-override]) 79AM_ENABLE_MULTILIB(, ..) 80 81# Calculate toolexeclibdir 82# Also toolexecdir, though it's only used in toolexeclibdir 83case ${enable_version_specific_runtime_libs} in 84 yes) 85 # Need the gcc compiler version to know where to install libraries 86 # and header files if --enable-version-specific-runtime-libs option 87 # is selected. 88 toolexecdir='$(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/$multi_os_directory ;; 105 esac 106 ;; 107esac 108AC_SUBST(toolexecdir) 109AC_SUBST(toolexeclibdir) 110 111# Check the compiler. 112# The same as in boehm-gc and libstdc++. Have to borrow it from there. 113# We must force CC to /not/ be precious variables; otherwise 114# the wrong, non-multilib-adjusted value will be used in multilibs. 115# As a side effect, we have to subst CFLAGS ourselves. 116 117m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) 118m4_define([_AC_ARG_VAR_PRECIOUS],[]) 119AC_PROG_CC 120AC_PROG_CXX 121AM_PROG_AS 122m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) 123 124AC_SUBST(CFLAGS) 125 126# In order to override CFLAGS_FOR_TARGET, all of our special flags go 127# in XCFLAGS. But we need them in CFLAGS during configury. So put them 128# in both places for now and restore CFLAGS at the end of config. 129save_CFLAGS="$CFLAGS" 130 131# Find other programs we need. 132AC_CHECK_TOOL(AR, ar) 133AC_CHECK_TOOL(NM, nm) 134AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) 135AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error) 136AC_PROG_MAKE_SET 137AC_PROG_INSTALL 138 139# See if makeinfo has been installed and is modern enough 140# that we can use it. 141ACX_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]*]) 144AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes") 145 146 147# Configure libtool 148AM_PROG_LIBTOOL 149AC_SUBST(enable_shared) 150AC_SUBST(enable_static) 151 152AM_MAINTAINER_MODE 153 154# For libtool versioning info, format is CURRENT:REVISION:AGE 155libtool_VERSION=1:0:0 156AC_SUBST(libtool_VERSION) 157 158# Check header files. 159AC_STDC_HEADERS 160AC_HEADER_TIME 161ACX_HEADER_STRING 162AC_CHECK_HEADERS(unistd.h semaphore.h sys/time.h sys/auxv.h malloc.h) 163 164GCC_HEADER_STDINT(gstdint.h) 165 166GCC_AC_FUNC_MMAP_BLACKLIST 167 168AC_C_BIGENDIAN 169# I don't like the default behaviour of WORDS_BIGENDIAN undefined for LE. 170AH_BOTTOM( 171[#ifndef WORDS_BIGENDIAN 172#define WORDS_BIGENDIAN 0 173#endif]) 174 175# Check to see if -pthread or -lpthread is needed. Prefer the former. 176# In case the pthread.h system header is not found, this test will fail. 177XPCFLAGS="" 178CFLAGS="$CFLAGS -pthread" 179AC_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 $LIBS" 186 AC_LINK_IFELSE( 187 [AC_LANG_PROGRAM( 188 [#include <pthread.h> 189 void *g(void *d) { return NULL; }], 190 [pthread_t t; pthread_create(&t,NULL,g,NULL);])], 191 [], 192 [AC_MSG_ERROR([Pthreads are required to build libitm])])]) 193 194# Check for functions needed. 195AC_CHECK_FUNCS(strtoull memalign posix_memalign getauxval) 196 197# Check for broken semaphore implementation on darwin. 198# sem_init returns: sem_init error: Function not implemented. 199case "$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 ;; 204esac 205 206GCC_LINUX_FUTEX(:) 207 208# See if we support thread-local storage. 209GCC_CHECK_TLS 210 211# See what sort of export controls are available. 212LIBITM_CHECK_ATTRIBUTE_VISIBILITY 213LIBITM_CHECK_ATTRIBUTE_DLLEXPORT 214LIBITM_CHECK_ATTRIBUTE_ALIAS 215 216# Check linker hardware capability support. 217GCC_CHECK_LINKER_HWCAP 218# If defaulting to -mavx, don't clear hwcaps. 219AC_CHECK_DECL([__AVX__], [HWCAP_LDFLAGS='']) 220 221LIBITM_ENABLE_SYMVERS 222if 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.]) 225fi 226 227# See if we can emit unwind info in the sjlj stub. 228GCC_AS_CFI_PSEUDO_OP 229 230# Determine the proper ABI type for size_t. 231LIBITM_CHECK_SIZE_T_MANGLING 232 233# Get target configury. 234. ${srcdir}/configure.tgt 235if test -n "$UNSUPPORTED"; then 236 AC_MSG_ERROR([Configuration ${target} is unsupported.]) 237fi 238 239CFLAGS="$save_CFLAGS $XCFLAGS" 240 241# Check for __sync_val_compare_and_swap, but only after the target has 242# had a chance to set XCFLAGS. 243LIBITM_CHECK_SYNC_BUILTINS 244LIBITM_CHECK_64BIT_SYNC_BUILTINS 245LIBITM_CHECK_AS_AVX 246LIBITM_CHECK_AS_RTM 247LIBITM_CHECK_AS_HTM 248 249GCC_CHECK_ELF_STYLE_WEAKREF 250 251# Cleanup and exit. 252CFLAGS="$save_CFLAGS" 253AC_CACHE_SAVE 254 255# Add -Wall -Werror if we are using GCC. 256if test "x$GCC" = "xyes"; then 257 XCFLAGS="$XCFLAGS -Wall -Werror" 258fi 259 260XCFLAGS="$XCFLAGS $XPCFLAGS" 261 262# Add CET specific flags if CET is enabled 263GCC_CET_FLAGS(CET_FLAGS) 264XCFLAGS="$XCFLAGS $CET_FLAGS" 265 266AC_SUBST(config_path) 267AC_SUBST(XCFLAGS) 268AC_SUBST(XLDFLAGS) 269 270if test ${multilib} = yes; then 271 multilib_arg="--enable-multilib" 272else 273 multilib_arg= 274fi 275 276# Set up the set of libraries that we need to link against for libitm. 277# Note that the GTM_SELF_SPECS in gcc.c will force -pthread for -fgnu-tm, 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. 280if test $enable_shared = yes; then 281 link_itm="-litm %{static: $LIBS}" 282else 283 link_itm="-litm $LIBS" 284fi 285AC_SUBST(link_itm) 286 287AM_CONDITIONAL([ARCH_ARM], [test "$ARCH" = arm]) 288AM_CONDITIONAL([ARCH_X86], [test "$ARCH" = x86]) 289AM_CONDITIONAL([ARCH_X86_AVX], [test "$libitm_cv_as_avx" = yes]) 290AM_CONDITIONAL([ARCH_FUTEX], [test $enable_linux_futex = yes]) 291 292# Determine what GCC version number to use in filesystem paths. 293GCC_BASE_VER 294 295AC_CONFIG_FILES(Makefile testsuite/Makefile libitm.spec) 296AC_OUTPUT 297