# Process this file with autoreconf to produce a configure script. # Copyright (C) 2011-2018 Free Software Foundation, Inc. # This program 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 2 of the License, or # (at your option) any later version. # # This program 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 this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. AC_PREREQ(2.59) AC_INIT([GNU TM Runtime Library], 1.0,,[libitm]) AC_CONFIG_HEADER(config.h) # ------- # Options # ------- AC_MSG_CHECKING([for --enable-version-specific-runtime-libs]) LIBITM_ENABLE(version-specific-runtime-libs, no, , [Specify that runtime libraries should be installed in a compiler-specific directory], permit yes|no) AC_MSG_RESULT($enable_version_specific_runtime_libs) # We would like our source tree to be readonly. However when releases or # pre-releases are generated, the flex/bison generated files as well as the # various formats of manuals need to be included along with the rest of the # sources. Therefore we have --enable-generated-files-in-srcdir to do # just that. AC_MSG_CHECKING([for --enable-generated-files-in-srcdir]) LIBITM_ENABLE(generated-files-in-srcdir, no, , [put copies of generated files in source dir intended for creating source tarballs for users without texinfo bison or flex.], permit yes|no) AC_MSG_RESULT($enable_generated_files_in_srcdir) AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes) # ------- # ------- # Gets build, host, target, *_vendor, *_cpu, *_os, etc. # # You will slowly go insane if you do not grok the following fact: when # building this library, the top-level /target/ becomes the library's /host/. # # configure then causes --target to default to --host, exactly like any # other package using autoconf. Therefore, 'target' and 'host' will # always be the same. This makes sense both for native and cross compilers # just think about it for a little while. :-) # # Also, if this library is being configured as part of a cross compiler, the # top-level configure script will pass the "real" host as $with_cross_host. # # Do not delete or change the following two lines. For why, see # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html AC_CANONICAL_SYSTEM target_alias=${target_alias-$host_alias} # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am. # 1.9.0: minimum required version # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch # of other PACKAGE_* variables will, however, and there's nothing # we can do about that; they come from AC_INIT). # no-dist: we don't want 'dist' and related rules. # foreign: we don't follow the normal rules for GNU packages (no COPYING # file in the top srcdir, etc, etc), so stop complaining. # -Wall: turns on all automake warnings... # -Wno-portability: ...except this one, since GNU make is required. # -Wno-override: ... and this one, since we do want this in testsuite. AM_INIT_AUTOMAKE([1.9.0 foreign no-dist -Wall -Wno-portability -Wno-override]) AM_ENABLE_MULTILIB(, ..) # Calculate toolexeclibdir # Also toolexecdir, though it's only used in toolexeclibdir case ${enable_version_specific_runtime_libs} in yes) # Need the gcc compiler version to know where to install libraries # and header files if --enable-version-specific-runtime-libs option # is selected. toolexecdir='$(libdir)/gcc/$(target_alias)' toolexeclibdir='$(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_alias)' toolexeclibdir='$(toolexecdir)/lib' else toolexecdir='$(libdir)/gcc-lib/$(target_alias)' toolexeclibdir='$(libdir)' fi multi_os_directory=`$CC -print-multi-os-directory` case $multi_os_directory in .) ;; # Avoid trailing /. *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;; esac ;; esac AC_SUBST(toolexecdir) AC_SUBST(toolexeclibdir) # Check the compiler. # The same as in boehm-gc and libstdc++. Have to borrow it from there. # We must force CC to /not/ be precious variables; otherwise # the wrong, non-multilib-adjusted value will be used in multilibs. # As a side effect, we have to subst CFLAGS ourselves. m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS]) m4_define([_AC_ARG_VAR_PRECIOUS],[]) AC_PROG_CC AC_PROG_CXX AM_PROG_AS m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS]) AC_SUBST(CFLAGS) # In order to override CFLAGS_FOR_TARGET, all of our special flags go # in XCFLAGS. But we need them in CFLAGS during configury. So put them # in both places for now and restore CFLAGS at the end of config. save_CFLAGS="$CFLAGS" # Find other programs we need. AC_CHECK_TOOL(AR, ar) AC_CHECK_TOOL(NM, nm) AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error) AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error) AC_PROG_MAKE_SET AC_PROG_INSTALL # See if makeinfo has been installed and is modern enough # that we can use it. ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version], [GNU texinfo.* \([0-9][0-9.]*\)], [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*]) AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes") # Configure libtool AM_PROG_LIBTOOL AC_SUBST(enable_shared) AC_SUBST(enable_static) AM_MAINTAINER_MODE # For libtool versioning info, format is CURRENT:REVISION:AGE libtool_VERSION=1:0:0 AC_SUBST(libtool_VERSION) # Check header files. AC_STDC_HEADERS AC_HEADER_TIME ACX_HEADER_STRING AC_CHECK_HEADERS(unistd.h semaphore.h sys/time.h sys/auxv.h malloc.h) GCC_HEADER_STDINT(gstdint.h) GCC_AC_FUNC_MMAP_BLACKLIST AC_C_BIGENDIAN # I don't like the default behaviour of WORDS_BIGENDIAN undefined for LE. AH_BOTTOM( [#ifndef WORDS_BIGENDIAN #define WORDS_BIGENDIAN 0 #endif]) # Check to see if -pthread or -lpthread is needed. Prefer the former. # In case the pthread.h system header is not found, this test will fail. XPCFLAGS="" CFLAGS="$CFLAGS -pthread" AC_LINK_IFELSE( [AC_LANG_PROGRAM( [#include <pthread.h> void *g(void *d) { return NULL; }], [pthread_t t; pthread_create(&t,NULL,g,NULL);])], [XPCFLAGS=" -Wc,-pthread"], [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS" AC_LINK_IFELSE( [AC_LANG_PROGRAM( [#include <pthread.h> void *g(void *d) { return NULL; }], [pthread_t t; pthread_create(&t,NULL,g,NULL);])], [], [AC_MSG_ERROR([Pthreads are required to build libitm])])]) # Check for functions needed. AC_CHECK_FUNCS(strtoull memalign posix_memalign getauxval) # Check for broken semaphore implementation on darwin. # sem_init returns: sem_init error: Function not implemented. case "$host" in *-darwin*) AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1, Define if the POSIX Semaphores do not work on your system.) ;; esac GCC_LINUX_FUTEX(:) # See if we support thread-local storage. GCC_CHECK_TLS # See what sort of export controls are available. LIBITM_CHECK_ATTRIBUTE_VISIBILITY LIBITM_CHECK_ATTRIBUTE_DLLEXPORT LIBITM_CHECK_ATTRIBUTE_ALIAS # Check linker hardware capability support. GCC_CHECK_LINKER_HWCAP # If defaulting to -mavx, don't clear hwcaps. AC_CHECK_DECL([__AVX__], [HWCAP_LDFLAGS='']) LIBITM_ENABLE_SYMVERS if test $enable_symvers = gnu; then AC_DEFINE(LIBITM_GNU_SYMBOL_VERSIONING, 1, [Define to 1 if GNU symbol versioning is used for libitm.]) fi # See if we can emit unwind info in the sjlj stub. GCC_AS_CFI_PSEUDO_OP # Determine the proper ABI type for size_t. LIBITM_CHECK_SIZE_T_MANGLING # Get target configury. . ${srcdir}/configure.tgt if test -n "$UNSUPPORTED"; then AC_MSG_ERROR([Configuration ${target} is unsupported.]) fi CFLAGS="$save_CFLAGS $XCFLAGS" # Check for __sync_val_compare_and_swap, but only after the target has # had a chance to set XCFLAGS. LIBITM_CHECK_SYNC_BUILTINS LIBITM_CHECK_64BIT_SYNC_BUILTINS LIBITM_CHECK_AS_AVX LIBITM_CHECK_AS_RTM LIBITM_CHECK_AS_HTM GCC_CHECK_ELF_STYLE_WEAKREF # Cleanup and exit. CFLAGS="$save_CFLAGS" AC_CACHE_SAVE # Add -Wall -Werror if we are using GCC. if test "x$GCC" = "xyes"; then XCFLAGS="$XCFLAGS -Wall -Werror" fi XCFLAGS="$XCFLAGS $XPCFLAGS" # Add CET specific flags if CET is enabled GCC_CET_FLAGS(CET_FLAGS) XCFLAGS="$XCFLAGS $CET_FLAGS" AC_SUBST(config_path) AC_SUBST(XCFLAGS) AC_SUBST(XLDFLAGS) if test ${multilib} = yes; then multilib_arg="--enable-multilib" else multilib_arg= fi # Set up the set of libraries that we need to link against for libitm. # Note that the GTM_SELF_SPECS in gcc.c will force -pthread for -fgnu-tm, # which will force linkage against -lpthread (or equivalent for the system). # That's not 100% ideal, but about the best we can do easily. if test $enable_shared = yes; then link_itm="-litm %{static: $LIBS}" else link_itm="-litm $LIBS" fi AC_SUBST(link_itm) AM_CONDITIONAL([ARCH_ARM], [test "$ARCH" = arm]) AM_CONDITIONAL([ARCH_X86], [test "$ARCH" = x86]) AM_CONDITIONAL([ARCH_X86_AVX], [test "$libitm_cv_as_avx" = yes]) AM_CONDITIONAL([ARCH_FUTEX], [test $enable_linux_futex = yes]) # Determine what GCC version number to use in filesystem paths. GCC_BASE_VER AC_CONFIG_FILES(Makefile testsuite/Makefile libitm.spec) AC_OUTPUT