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111
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1 # Process this file with autoreconf to produce a configure script.
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145
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2 # Copyright (C) 2011-2020 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_INIT([GNU TM Runtime Library], 1.0,,[libitm])
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19 AC_CONFIG_HEADER(config.h)
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20
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21 # -------
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22 # Options
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23 # -------
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24
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25 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
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26 LIBITM_ENABLE(version-specific-runtime-libs, no, ,
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27 [Specify that runtime libraries should be installed in a compiler-specific directory],
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28 permit yes|no)
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29 AC_MSG_RESULT($enable_version_specific_runtime_libs)
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30
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31 # We would like our source tree to be readonly. However when releases or
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32 # pre-releases are generated, the flex/bison generated files as well as the
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33 # various formats of manuals need to be included along with the rest of the
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34 # sources. Therefore we have --enable-generated-files-in-srcdir to do
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35 # just that.
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36 AC_MSG_CHECKING([for --enable-generated-files-in-srcdir])
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37 LIBITM_ENABLE(generated-files-in-srcdir, no, ,
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38 [put copies of generated files in source dir intended for creating source
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39 tarballs for users without texinfo bison or flex.],
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40 permit yes|no)
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41 AC_MSG_RESULT($enable_generated_files_in_srcdir)
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42 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
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43
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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 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
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49 #
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50 # You will slowly go insane if you do not grok the following fact: when
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51 # building this library, the top-level /target/ becomes the library's /host/.
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52 #
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53 # configure then causes --target to default to --host, exactly like any
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54 # other package using autoconf. Therefore, 'target' and 'host' will
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55 # always be the same. This makes sense both for native and cross compilers
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56 # just think about it for a little while. :-)
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57 #
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58 # Also, if this library is being configured as part of a cross compiler, the
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59 # top-level configure script will pass the "real" host as $with_cross_host.
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60 #
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61 # Do not delete or change the following two lines. For why, see
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62 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
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63 AC_CANONICAL_SYSTEM
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64 target_alias=${target_alias-$host_alias}
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65
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66 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
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67 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
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68 # 1.9.0: minimum required version
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69 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
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70 # of other PACKAGE_* variables will, however, and there's nothing
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71 # we can do about that; they come from AC_INIT).
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72 # no-dist: we don't want 'dist' and related rules.
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73 # foreign: we don't follow the normal rules for GNU packages (no COPYING
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74 # file in the top srcdir, etc, etc), so stop complaining.
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75 # -Wall: turns on all automake warnings...
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76 # -Wno-portability: ...except this one, since GNU make is required.
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77 # -Wno-override: ... and this one, since we do want this in testsuite.
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78 AM_INIT_AUTOMAKE([1.9.0 foreign no-dist -Wall -Wno-portability -Wno-override])
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79 AM_ENABLE_MULTILIB(, ..)
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80
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145
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81 GCC_WITH_TOOLEXECLIBDIR
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82
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111
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83 # Calculate toolexeclibdir
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84 # Also toolexecdir, though it's only used in toolexeclibdir
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85 case ${enable_version_specific_runtime_libs} in
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86 yes)
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87 # Need the gcc compiler version to know where to install libraries
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88 # and header files if --enable-version-specific-runtime-libs option
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89 # is selected.
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90 toolexecdir='$(libdir)/gcc/$(target_alias)'
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91 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
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92 ;;
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93 no)
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94 if test -n "$with_cross_host" &&
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95 test x"$with_cross_host" != x"no"; then
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96 # Install a library built with a cross compiler in tooldir, not libdir.
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97 toolexecdir='$(exec_prefix)/$(target_alias)'
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145
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98 case ${with_toolexeclibdir} in
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99 no)
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100 toolexeclibdir='$(toolexecdir)/lib'
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101 ;;
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102 *)
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103 toolexeclibdir=${with_toolexeclibdir}
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104 ;;
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105 esac
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111
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106 else
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107 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
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108 toolexeclibdir='$(libdir)'
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109 fi
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110 multi_os_directory=`$CC -print-multi-os-directory`
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111 case $multi_os_directory in
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112 .) ;; # Avoid trailing /.
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113 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
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114 esac
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115 ;;
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116 esac
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117 AC_SUBST(toolexecdir)
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118 AC_SUBST(toolexeclibdir)
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119
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120 # Check the compiler.
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121 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
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122 # We must force CC to /not/ be precious variables; otherwise
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123 # the wrong, non-multilib-adjusted value will be used in multilibs.
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124 # As a side effect, we have to subst CFLAGS ourselves.
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125
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126 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
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127 m4_define([_AC_ARG_VAR_PRECIOUS],[])
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128 AC_PROG_CC
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129 AC_PROG_CXX
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130 AM_PROG_AS
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131 m4_rename_force([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
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132
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133 AC_SUBST(CFLAGS)
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134
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135 # In order to override CFLAGS_FOR_TARGET, all of our special flags go
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136 # in XCFLAGS. But we need them in CFLAGS during configury. So put them
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137 # in both places for now and restore CFLAGS at the end of config.
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138 save_CFLAGS="$CFLAGS"
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139
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140 # Find other programs we need.
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141 AC_CHECK_TOOL(AR, ar)
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142 AC_CHECK_TOOL(NM, nm)
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143 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
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144 AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error)
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145 AC_PROG_MAKE_SET
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146 AC_PROG_INSTALL
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147
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148 # See if makeinfo has been installed and is modern enough
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149 # that we can use it.
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150 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
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151 [GNU texinfo.* \([0-9][0-9.]*\)],
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152 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
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153 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
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154
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155
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156 # Configure libtool
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157 AM_PROG_LIBTOOL
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158 AC_SUBST(enable_shared)
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159 AC_SUBST(enable_static)
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160
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161 AM_MAINTAINER_MODE
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162
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163 # For libtool versioning info, format is CURRENT:REVISION:AGE
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164 libtool_VERSION=1:0:0
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165 AC_SUBST(libtool_VERSION)
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166
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167 # Check header files.
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168 AC_STDC_HEADERS
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169 AC_HEADER_TIME
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170 ACX_HEADER_STRING
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171 AC_CHECK_HEADERS(unistd.h semaphore.h sys/time.h sys/auxv.h malloc.h)
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172
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173 GCC_HEADER_STDINT(gstdint.h)
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174
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175 GCC_AC_FUNC_MMAP_BLACKLIST
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176
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177 AC_C_BIGENDIAN
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178 # I don't like the default behaviour of WORDS_BIGENDIAN undefined for LE.
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179 AH_BOTTOM(
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180 [#ifndef WORDS_BIGENDIAN
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181 #define WORDS_BIGENDIAN 0
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182 #endif])
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183
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184 # Check to see if -pthread or -lpthread is needed. Prefer the former.
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185 # In case the pthread.h system header is not found, this test will fail.
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186 XPCFLAGS=""
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187 CFLAGS="$CFLAGS -pthread"
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188 AC_LINK_IFELSE(
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189 [AC_LANG_PROGRAM(
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190 [#include <pthread.h>
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191 void *g(void *d) { return NULL; }],
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192 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
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193 [XPCFLAGS=" -Wc,-pthread"],
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194 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
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195 AC_LINK_IFELSE(
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196 [AC_LANG_PROGRAM(
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197 [#include <pthread.h>
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198 void *g(void *d) { return NULL; }],
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199 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
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200 [],
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201 [AC_MSG_ERROR([Pthreads are required to build libitm])])])
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202
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203 # Check for functions needed.
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204 AC_CHECK_FUNCS(strtoull memalign posix_memalign getauxval)
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205
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206 # Check for broken semaphore implementation on darwin.
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207 # sem_init returns: sem_init error: Function not implemented.
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208 case "$host" in
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209 *-darwin*)
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210 AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
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211 Define if the POSIX Semaphores do not work on your system.)
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212 ;;
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213 esac
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214
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215 GCC_LINUX_FUTEX(:)
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216
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217 # See if we support thread-local storage.
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218 GCC_CHECK_TLS
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219
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220 # See what sort of export controls are available.
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221 LIBITM_CHECK_ATTRIBUTE_VISIBILITY
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222 LIBITM_CHECK_ATTRIBUTE_DLLEXPORT
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223 LIBITM_CHECK_ATTRIBUTE_ALIAS
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224
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225 # Check linker hardware capability support.
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226 GCC_CHECK_LINKER_HWCAP
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227 # If defaulting to -mavx, don't clear hwcaps.
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228 AC_CHECK_DECL([__AVX__], [HWCAP_LDFLAGS=''])
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229
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230 LIBITM_ENABLE_SYMVERS
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231 if test $enable_symvers = gnu; then
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232 AC_DEFINE(LIBITM_GNU_SYMBOL_VERSIONING, 1,
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233 [Define to 1 if GNU symbol versioning is used for libitm.])
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234 fi
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235
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236 # See if we can emit unwind info in the sjlj stub.
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237 GCC_AS_CFI_PSEUDO_OP
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238
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239 # Determine the proper ABI type for size_t.
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240 LIBITM_CHECK_SIZE_T_MANGLING
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241
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242 # Get target configury.
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243 . ${srcdir}/configure.tgt
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244 if test -n "$UNSUPPORTED"; then
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245 AC_MSG_ERROR([Configuration ${target} is unsupported.])
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246 fi
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247
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248 CFLAGS="$save_CFLAGS $XCFLAGS"
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249
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250 # Check for __sync_val_compare_and_swap, but only after the target has
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251 # had a chance to set XCFLAGS.
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252 LIBITM_CHECK_SYNC_BUILTINS
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253 LIBITM_CHECK_64BIT_SYNC_BUILTINS
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254 LIBITM_CHECK_AS_AVX
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255 LIBITM_CHECK_AS_RTM
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256 LIBITM_CHECK_AS_HTM
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257
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258 GCC_CHECK_ELF_STYLE_WEAKREF
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259
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260 # Cleanup and exit.
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261 CFLAGS="$save_CFLAGS"
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262 AC_CACHE_SAVE
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263
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264 # Add -Wall -Werror if we are using GCC.
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265 if test "x$GCC" = "xyes"; then
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266 XCFLAGS="$XCFLAGS -Wall -Werror"
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267 fi
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268
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269 XCFLAGS="$XCFLAGS $XPCFLAGS"
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270
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131
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271 # Add CET specific flags if CET is enabled
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272 GCC_CET_FLAGS(CET_FLAGS)
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273 XCFLAGS="$XCFLAGS $CET_FLAGS"
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274
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111
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275 AC_SUBST(config_path)
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276 AC_SUBST(XCFLAGS)
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277 AC_SUBST(XLDFLAGS)
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278
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279 if test ${multilib} = yes; then
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280 multilib_arg="--enable-multilib"
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281 else
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282 multilib_arg=
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283 fi
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284
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285 # Set up the set of libraries that we need to link against for libitm.
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286 # Note that the GTM_SELF_SPECS in gcc.c will force -pthread for -fgnu-tm,
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287 # which will force linkage against -lpthread (or equivalent for the system).
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288 # That's not 100% ideal, but about the best we can do easily.
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289 if test $enable_shared = yes; then
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290 link_itm="-litm %{static: $LIBS}"
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291 else
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292 link_itm="-litm $LIBS"
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293 fi
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294 AC_SUBST(link_itm)
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295
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296 AM_CONDITIONAL([ARCH_ARM], [test "$ARCH" = arm])
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297 AM_CONDITIONAL([ARCH_X86], [test "$ARCH" = x86])
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298 AM_CONDITIONAL([ARCH_X86_AVX], [test "$libitm_cv_as_avx" = yes])
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299 AM_CONDITIONAL([ARCH_FUTEX], [test $enable_linux_futex = yes])
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300
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301 # Determine what GCC version number to use in filesystem paths.
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302 GCC_BASE_VER
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303
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304 AC_CONFIG_FILES(Makefile testsuite/Makefile libitm.spec)
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305 AC_OUTPUT
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