libitm/configure.ac

   1 # Process this file with autoreconf to produce a configure script.
   2 #   Copyright (C) 2011-2014 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
  18 AC_PREREQ(2.59)
  19 AC_INIT([GNU TM Runtime Library], 1.0,,[libitm])
  20 AC_CONFIG_HEADER(config.h)
  21
  22 # -------
  23 # Options
  24 # -------
  25
  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],
  29    permit yes|no)
  30 AC_MSG_RESULT($enable_version_specific_runtime_libs)
  31
  32 # We would like our source tree to be readonly. However when releases or
  33 # pre-releases are generated, the flex/bison generated files as well as the
  34 # various formats of manuals need to be included along with the rest of the
  35 # sources.  Therefore we have --enable-generated-files-in-srcdir to do
  36 # just that.
  37 AC_MSG_CHECKING([for --enable-generated-files-in-srcdir])
  38 LIBITM_ENABLE(generated-files-in-srcdir, no, ,
  39    [put copies of generated files in source dir intended for creating source
  40     tarballs for users without texinfo bison or flex.],
  41    permit yes|no)
  42 AC_MSG_RESULT($enable_generated_files_in_srcdir)
  43 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
  44
  45
  46 # -------
  47 # -------
  48
  49 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
  50 #
  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/.
  53 #
  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.  :-)
  58 #
  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 $with_cross_host.
  61 #
  62 # Do not delete or change the following two lines.  For why, see
  63 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
  64 AC_CANONICAL_SYSTEM
  65 target_alias=${target_alias-$host_alias}
  66
  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(, ..)
  81
  82 # Calculate toolexeclibdir
  83 # Also toolexecdir, though it's only used in toolexeclibdir
  84 case ${enable_version_specific_runtime_libs} in
  85   yes)
  86     # Need the gcc compiler version to know where to install libraries
  87     # and header files if --enable-version-specific-runtime-libs option
  88     # is selected.
  89     toolexecdir='$(libdir)/gcc/$(target_alias)'
  90     toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
  91     ;;
  92   no)
  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='$(toolexecdir)/lib'
  98     else
  99       toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
 100       toolexeclibdir='$(libdir)'
 101     fi
 102     multi_os_directory=`$CC -print-multi-os-directory`
 103     case $multi_os_directory in
 104       .) ;; # Avoid trailing /.
 105       *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
 106     esac
 107     ;;
 108 esac
 109 AC_SUBST(toolexecdir)
 110 AC_SUBST(toolexeclibdir)
 111
 112 # Check the compiler.
 113 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
 114 # We must force CC to /not/ be precious variables; otherwise
 115 # the wrong, non-multilib-adjusted value will be used in multilibs.
 116 # As a side effect, we have to subst CFLAGS ourselves.
 117
 118 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
 119 m4_define([_AC_ARG_VAR_PRECIOUS],[])
 120 AC_PROG_CC
 121 AC_PROG_CXX
 122 AM_PROG_AS
 123 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
 124
 125 AC_SUBST(CFLAGS)
 126
 127 # In order to override CFLAGS_FOR_TARGET, all of our special flags go
 128 # in XCFLAGS.  But we need them in CFLAGS during configury.  So put them
 129 # in both places for now and restore CFLAGS at the end of config.
 130 save_CFLAGS="$CFLAGS"
 131
 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)
 137 AC_PROG_MAKE_SET
 138 AC_PROG_INSTALL
 139
 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 $gcc_cv_prog_makeinfo_modern = "yes")
 146
 147
 148 # Configure libtool
 149 AM_PROG_LIBTOOL
 150 AC_SUBST(enable_shared)
 151 AC_SUBST(enable_static)
 152
 153 AM_MAINTAINER_MODE
 154
 155 # For libtool versioning info, format is CURRENT:REVISION:AGE
 156 libtool_VERSION=1:0:0
 157 AC_SUBST(libtool_VERSION)
 158
 159 # Check header files.
 160 AC_STDC_HEADERS
 161 AC_HEADER_TIME
 162 ACX_HEADER_STRING
 163 AC_CHECK_HEADERS(unistd.h semaphore.h sys/time.h sys/auxv.h malloc.h)
 164
 165 GCC_HEADER_STDINT(gstdint.h)
 166
 167 GCC_AC_FUNC_MMAP_BLACKLIST
 168
 169 AC_C_BIGENDIAN
 170 # I don't like the default behaviour of WORDS_BIGENDIAN undefined for LE.
 171 AH_BOTTOM(
 172 [#ifndef WORDS_BIGENDIAN
 173 #define WORDS_BIGENDIAN 0
 174 #endif])
 175
 176 # Check to see if -pthread or -lpthread is needed.  Prefer the former.
 177 # In case the pthread.h system header is not found, this test will fail.
 178 XPCFLAGS=""
 179 CFLAGS="$CFLAGS -pthread"
 180 AC_LINK_IFELSE(
 181  [AC_LANG_PROGRAM(
 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 $LIBS"
 187   AC_LINK_IFELSE(
 188    [AC_LANG_PROGRAM(
 189     [#include <pthread.h>
 190      void *g(void *d) { return NULL; }],
 191     [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
 192    [],
 193    [AC_MSG_ERROR([Pthreads are required to build libitm])])])
 194
 195 # Check for functions needed.
 196 AC_CHECK_FUNCS(strtoull memalign posix_memalign getauxval)
 197
 198 # Check for broken semaphore implementation on darwin.
 199 # sem_init returns: sem_init error: Function not implemented.
 200 case "$host" in
 201   *-darwin*)
 202     AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
 203         Define if the POSIX Semaphores do not work on your system.)
 204     ;;
 205 esac
 206
 207 GCC_LINUX_FUTEX(:)
 208
 209 # See if we support thread-local storage.
 210 GCC_CHECK_TLS
 211
 212 # See what sort of export controls are available.
 213 LIBITM_CHECK_ATTRIBUTE_VISIBILITY
 214 LIBITM_CHECK_ATTRIBUTE_DLLEXPORT
 215 LIBITM_CHECK_ATTRIBUTE_ALIAS
 216
 217 # Check linker hardware capability support.
 218 LIBITM_CHECK_LINKER_HWCAP
 219 # If defaulting to -mavx, don't clear hwcaps.
 220 AC_CHECK_DECL([__AVX__], [HWCAP_LDFLAGS=''])
 221
 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.])
 226 fi
 227
 228 # See if we can emit unwind info in the sjlj stub.
 229 GCC_AS_CFI_PSEUDO_OP
 230
 231 # Determine the proper ABI type for size_t.
 232 LIBITM_CHECK_SIZE_T_MANGLING
 233
 234 # Get target configury.
 235 . ${srcdir}/configure.tgt
 236 if test -n "$UNSUPPORTED"; then
 237   AC_MSG_ERROR([Configuration ${target} is unsupported.])
 238 fi
 239
 240 CFLAGS="$save_CFLAGS $XCFLAGS"
 241
 242 # Check for __sync_val_compare_and_swap, but only after the target has
 243 # had a chance to set XCFLAGS.
 244 LIBITM_CHECK_SYNC_BUILTINS
 245 LIBITM_CHECK_64BIT_SYNC_BUILTINS
 246 LIBITM_CHECK_AS_AVX
 247 LIBITM_CHECK_AS_RTM
 248 LIBITM_CHECK_AS_HTM
 249
 250 GCC_CHECK_ELF_STYLE_WEAKREF
 251
 252 # Cleanup and exit.
 253 CFLAGS="$save_CFLAGS"
 254 AC_CACHE_SAVE
 255
 256 # Add -Wall -Werror if we are using GCC.
 257 if test "x$GCC" = "xyes"; then
 258   XCFLAGS="$XCFLAGS -Wall -Werror"
 259 fi
 260
 261 XCFLAGS="$XCFLAGS $XPCFLAGS"
 262
 263 AC_SUBST(config_path)
 264 AC_SUBST(XCFLAGS)
 265 AC_SUBST(XLDFLAGS)
 266
 267 if test ${multilib} = yes; then
 268   multilib_arg="--enable-multilib"
 269 else
 270   multilib_arg=
 271 fi
 272
 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}"
 279 else
 280   link_itm="-litm $LIBS"
 281 fi
 282 AC_SUBST(link_itm)
 283
 284 AM_CONDITIONAL([ARCH_ARM], [test "$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])
 288
 289 AC_CONFIG_FILES(Makefile testsuite/Makefile libitm.spec)
 290 AC_OUTPUT