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111
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1 # Process this file with autoreconf to produce a configure script.
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131
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2 # Copyright (C) 2011-2018 Free Software Foundation, Inc.
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111
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3
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4 # This program is free software; you can redistribute it and/or modify
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5 # it under the terms of the GNU General Public License as published by
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6 # the Free Software Foundation; either version 2 of the License, or
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7 # (at your option) any later version.
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8 #
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9 # This program is distributed in the hope that it will be useful,
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10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 # GNU General Public License for more details.
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13 #
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14 # You should have received a copy of the GNU General Public License
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15 # along with this program; if not, write to the Free Software
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16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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17
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18 AC_PREREQ(2.59)
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19 AC_INIT([GNU TM Runtime Library], 1.0,,[libitm])
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20 AC_CONFIG_HEADER(config.h)
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21
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22 # -------
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23 # Options
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24 # -------
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25
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26 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
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27 LIBITM_ENABLE(version-specific-runtime-libs, no, ,
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28 [Specify that runtime libraries should be installed in a compiler-specific directory],
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29 permit yes|no)
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30 AC_MSG_RESULT($enable_version_specific_runtime_libs)
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31
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32 # We would like our source tree to be readonly. However when releases or
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33 # pre-releases are generated, the flex/bison generated files as well as the
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34 # various formats of manuals need to be included along with the rest of the
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35 # sources. Therefore we have --enable-generated-files-in-srcdir to do
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36 # just that.
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37 AC_MSG_CHECKING([for --enable-generated-files-in-srcdir])
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38 LIBITM_ENABLE(generated-files-in-srcdir, no, ,
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39 [put copies of generated files in source dir intended for creating source
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40 tarballs for users without texinfo bison or flex.],
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41 permit yes|no)
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42 AC_MSG_RESULT($enable_generated_files_in_srcdir)
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43 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
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44
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45
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46 # -------
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47 # -------
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48
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49 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
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50 #
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51 # You will slowly go insane if you do not grok the following fact: when
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52 # building this library, the top-level /target/ becomes the library's /host/.
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53 #
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54 # configure then causes --target to default to --host, exactly like any
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55 # other package using autoconf. Therefore, 'target' and 'host' will
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56 # always be the same. This makes sense both for native and cross compilers
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57 # just think about it for a little while. :-)
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58 #
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59 # Also, if this library is being configured as part of a cross compiler, the
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60 # top-level configure script will pass the "real" host as $with_cross_host.
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61 #
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62 # Do not delete or change the following two lines. For why, see
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63 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
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64 AC_CANONICAL_SYSTEM
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65 target_alias=${target_alias-$host_alias}
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66
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67 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
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68 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
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69 # 1.9.0: minimum required version
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70 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
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71 # of other PACKAGE_* variables will, however, and there's nothing
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72 # we can do about that; they come from AC_INIT).
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73 # no-dist: we don't want 'dist' and related rules.
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74 # foreign: we don't follow the normal rules for GNU packages (no COPYING
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75 # file in the top srcdir, etc, etc), so stop complaining.
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76 # -Wall: turns on all automake warnings...
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77 # -Wno-portability: ...except this one, since GNU make is required.
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78 # -Wno-override: ... and this one, since we do want this in testsuite.
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79 AM_INIT_AUTOMAKE([1.9.0 foreign no-dist -Wall -Wno-portability -Wno-override])
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80 AM_ENABLE_MULTILIB(, ..)
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81
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82 # Calculate toolexeclibdir
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83 # Also toolexecdir, though it's only used in toolexeclibdir
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84 case ${enable_version_specific_runtime_libs} in
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85 yes)
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86 # Need the gcc compiler version to know where to install libraries
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87 # and header files if --enable-version-specific-runtime-libs option
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88 # is selected.
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89 toolexecdir='$(libdir)/gcc/$(target_alias)'
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90 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
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91 ;;
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92 no)
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93 if test -n "$with_cross_host" &&
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94 test x"$with_cross_host" != x"no"; then
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95 # Install a library built with a cross compiler in tooldir, not libdir.
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96 toolexecdir='$(exec_prefix)/$(target_alias)'
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97 toolexeclibdir='$(toolexecdir)/lib'
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98 else
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99 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
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100 toolexeclibdir='$(libdir)'
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101 fi
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102 multi_os_directory=`$CC -print-multi-os-directory`
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103 case $multi_os_directory in
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104 .) ;; # Avoid trailing /.
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105 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
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106 esac
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107 ;;
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108 esac
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109 AC_SUBST(toolexecdir)
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110 AC_SUBST(toolexeclibdir)
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111
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112 # Check the compiler.
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113 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
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114 # We must force CC to /not/ be precious variables; otherwise
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115 # the wrong, non-multilib-adjusted value will be used in multilibs.
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116 # As a side effect, we have to subst CFLAGS ourselves.
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117
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118 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
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119 m4_define([_AC_ARG_VAR_PRECIOUS],[])
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120 AC_PROG_CC
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121 AC_PROG_CXX
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122 AM_PROG_AS
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123 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
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124
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125 AC_SUBST(CFLAGS)
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126
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127 # In order to override CFLAGS_FOR_TARGET, all of our special flags go
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128 # in XCFLAGS. But we need them in CFLAGS during configury. So put them
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129 # in both places for now and restore CFLAGS at the end of config.
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130 save_CFLAGS="$CFLAGS"
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131
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132 # Find other programs we need.
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133 AC_CHECK_TOOL(AR, ar)
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134 AC_CHECK_TOOL(NM, nm)
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135 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
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136 AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error)
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137 AC_PROG_MAKE_SET
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138 AC_PROG_INSTALL
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139
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140 # See if makeinfo has been installed and is modern enough
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141 # that we can use it.
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142 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
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143 [GNU texinfo.* \([0-9][0-9.]*\)],
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144 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
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145 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
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146
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147
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148 # Configure libtool
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149 AM_PROG_LIBTOOL
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150 AC_SUBST(enable_shared)
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151 AC_SUBST(enable_static)
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152
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153 AM_MAINTAINER_MODE
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154
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155 # For libtool versioning info, format is CURRENT:REVISION:AGE
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156 libtool_VERSION=1:0:0
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157 AC_SUBST(libtool_VERSION)
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158
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159 # Check header files.
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160 AC_STDC_HEADERS
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161 AC_HEADER_TIME
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162 ACX_HEADER_STRING
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163 AC_CHECK_HEADERS(unistd.h semaphore.h sys/time.h sys/auxv.h malloc.h)
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164
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165 GCC_HEADER_STDINT(gstdint.h)
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166
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167 GCC_AC_FUNC_MMAP_BLACKLIST
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168
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169 AC_C_BIGENDIAN
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170 # I don't like the default behaviour of WORDS_BIGENDIAN undefined for LE.
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171 AH_BOTTOM(
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172 [#ifndef WORDS_BIGENDIAN
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173 #define WORDS_BIGENDIAN 0
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174 #endif])
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175
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176 # Check to see if -pthread or -lpthread is needed. Prefer the former.
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177 # In case the pthread.h system header is not found, this test will fail.
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178 XPCFLAGS=""
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179 CFLAGS="$CFLAGS -pthread"
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180 AC_LINK_IFELSE(
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181 [AC_LANG_PROGRAM(
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182 [#include <pthread.h>
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183 void *g(void *d) { return NULL; }],
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184 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
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185 [XPCFLAGS=" -Wc,-pthread"],
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186 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
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187 AC_LINK_IFELSE(
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188 [AC_LANG_PROGRAM(
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189 [#include <pthread.h>
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190 void *g(void *d) { return NULL; }],
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191 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
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192 [],
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193 [AC_MSG_ERROR([Pthreads are required to build libitm])])])
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194
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195 # Check for functions needed.
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196 AC_CHECK_FUNCS(strtoull memalign posix_memalign getauxval)
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197
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198 # Check for broken semaphore implementation on darwin.
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199 # sem_init returns: sem_init error: Function not implemented.
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200 case "$host" in
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201 *-darwin*)
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202 AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
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203 Define if the POSIX Semaphores do not work on your system.)
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204 ;;
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205 esac
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206
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207 GCC_LINUX_FUTEX(:)
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208
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209 # See if we support thread-local storage.
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210 GCC_CHECK_TLS
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211
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212 # See what sort of export controls are available.
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213 LIBITM_CHECK_ATTRIBUTE_VISIBILITY
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214 LIBITM_CHECK_ATTRIBUTE_DLLEXPORT
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215 LIBITM_CHECK_ATTRIBUTE_ALIAS
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216
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217 # Check linker hardware capability support.
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218 GCC_CHECK_LINKER_HWCAP
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219 # If defaulting to -mavx, don't clear hwcaps.
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220 AC_CHECK_DECL([__AVX__], [HWCAP_LDFLAGS=''])
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221
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222 LIBITM_ENABLE_SYMVERS
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223 if test $enable_symvers = gnu; then
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224 AC_DEFINE(LIBITM_GNU_SYMBOL_VERSIONING, 1,
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225 [Define to 1 if GNU symbol versioning is used for libitm.])
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226 fi
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227
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228 # See if we can emit unwind info in the sjlj stub.
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229 GCC_AS_CFI_PSEUDO_OP
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230
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231 # Determine the proper ABI type for size_t.
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232 LIBITM_CHECK_SIZE_T_MANGLING
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233
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234 # Get target configury.
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235 . ${srcdir}/configure.tgt
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236 if test -n "$UNSUPPORTED"; then
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237 AC_MSG_ERROR([Configuration ${target} is unsupported.])
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238 fi
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239
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240 CFLAGS="$save_CFLAGS $XCFLAGS"
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241
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242 # Check for __sync_val_compare_and_swap, but only after the target has
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243 # had a chance to set XCFLAGS.
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244 LIBITM_CHECK_SYNC_BUILTINS
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245 LIBITM_CHECK_64BIT_SYNC_BUILTINS
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246 LIBITM_CHECK_AS_AVX
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247 LIBITM_CHECK_AS_RTM
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248 LIBITM_CHECK_AS_HTM
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249
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250 GCC_CHECK_ELF_STYLE_WEAKREF
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251
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252 # Cleanup and exit.
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253 CFLAGS="$save_CFLAGS"
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254 AC_CACHE_SAVE
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255
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256 # Add -Wall -Werror if we are using GCC.
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257 if test "x$GCC" = "xyes"; then
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258 XCFLAGS="$XCFLAGS -Wall -Werror"
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259 fi
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260
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261 XCFLAGS="$XCFLAGS $XPCFLAGS"
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262
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131
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263 # Add CET specific flags if CET is enabled
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264 GCC_CET_FLAGS(CET_FLAGS)
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265 XCFLAGS="$XCFLAGS $CET_FLAGS"
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266
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111
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267 AC_SUBST(config_path)
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268 AC_SUBST(XCFLAGS)
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269 AC_SUBST(XLDFLAGS)
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270
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271 if test ${multilib} = yes; then
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272 multilib_arg="--enable-multilib"
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273 else
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274 multilib_arg=
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275 fi
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276
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277 # Set up the set of libraries that we need to link against for libitm.
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278 # Note that the GTM_SELF_SPECS in gcc.c will force -pthread for -fgnu-tm,
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279 # which will force linkage against -lpthread (or equivalent for the system).
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280 # That's not 100% ideal, but about the best we can do easily.
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281 if test $enable_shared = yes; then
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282 link_itm="-litm %{static: $LIBS}"
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283 else
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284 link_itm="-litm $LIBS"
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285 fi
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286 AC_SUBST(link_itm)
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287
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288 AM_CONDITIONAL([ARCH_ARM], [test "$ARCH" = arm])
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289 AM_CONDITIONAL([ARCH_X86], [test "$ARCH" = x86])
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290 AM_CONDITIONAL([ARCH_X86_AVX], [test "$libitm_cv_as_avx" = yes])
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291 AM_CONDITIONAL([ARCH_FUTEX], [test $enable_linux_futex = yes])
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292
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293 # Determine what GCC version number to use in filesystem paths.
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294 GCC_BASE_VER
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295
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296 AC_CONFIG_FILES(Makefile testsuite/Makefile libitm.spec)
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297 AC_OUTPUT
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