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1 # Process this file with autoconf to produce a configure script, like so:
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2 # aclocal -I ../config && autoconf && autoheader && automake
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3
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4 AC_PREREQ(2.59)
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5 AC_INIT([GNU OpenMP Runtime Library], 1.0,,[libgomp])
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6 AC_CONFIG_HEADER(config.h)
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7
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8 # -------
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9 # Options
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10 # -------
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11
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12 AC_MSG_CHECKING([for --enable-version-specific-runtime-libs])
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13 LIBGOMP_ENABLE(version-specific-runtime-libs, no, ,
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14 [Specify that runtime libraries should be installed in a compiler-specific directory],
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15 permit yes|no)
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16 AC_MSG_RESULT($enable_version_specific_runtime_libs)
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17
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18 # We would like our source tree to be readonly. However when releases or
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19 # pre-releases are generated, the flex/bison generated files as well as the
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20 # various formats of manuals need to be included along with the rest of the
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21 # sources. Therefore we have --enable-generated-files-in-srcdir to do
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22 # just that.
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23 AC_MSG_CHECKING([for --enable-generated-files-in-srcdir])
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24 LIBGOMP_ENABLE(generated-files-in-srcdir, no, ,
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25 [put copies of generated files in source dir intended for creating source
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26 tarballs for users without texinfo bison or flex.],
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27 permit yes|no)
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28 AC_MSG_RESULT($enable_generated_files_in_srcdir)
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29 AM_CONDITIONAL(GENINSRC, test "$enable_generated_files_in_srcdir" = yes)
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30
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31
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32 # -------
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33 # -------
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34
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35 # Gets build, host, target, *_vendor, *_cpu, *_os, etc.
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36 #
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37 # You will slowly go insane if you do not grok the following fact: when
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38 # building this library, the top-level /target/ becomes the library's /host/.
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39 #
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40 # configure then causes --target to default to --host, exactly like any
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41 # other package using autoconf. Therefore, 'target' and 'host' will
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42 # always be the same. This makes sense both for native and cross compilers
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43 # just think about it for a little while. :-)
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44 #
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45 # Also, if this library is being configured as part of a cross compiler, the
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46 # top-level configure script will pass the "real" host as $with_cross_host.
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47 #
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48 # Do not delete or change the following two lines. For why, see
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49 # http://gcc.gnu.org/ml/libstdc++/2003-07/msg00451.html
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50 AC_CANONICAL_SYSTEM
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51 target_alias=${target_alias-$host_alias}
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52
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53 # Sets up automake. Must come after AC_CANONICAL_SYSTEM. Each of the
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54 # following is magically included in AUTOMAKE_OPTIONS in each Makefile.am.
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55 # 1.9.0: minimum required version
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56 # no-define: PACKAGE and VERSION will not be #define'd in config.h (a bunch
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57 # of other PACKAGE_* variables will, however, and there's nothing
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58 # we can do about that; they come from AC_INIT).
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59 # foreign: we don't follow the normal rules for GNU packages (no COPYING
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60 # file in the top srcdir, etc, etc), so stop complaining.
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61 # -Wall: turns on all automake warnings...
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62 # -Wno-portability: ...except this one, since GNU make is required.
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63 # -Wno-override: ... and this one, since we do want this in testsuite.
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64 AM_INIT_AUTOMAKE([1.9.0 foreign -Wall -Wno-portability -Wno-override])
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65 AM_ENABLE_MULTILIB(, ..)
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66
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67 # Calculate toolexeclibdir
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68 # Also toolexecdir, though it's only used in toolexeclibdir
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69 case ${enable_version_specific_runtime_libs} in
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70 yes)
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71 # Need the gcc compiler version to know where to install libraries
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72 # and header files if --enable-version-specific-runtime-libs option
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73 # is selected.
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74 toolexecdir='$(libdir)/gcc/$(target_alias)'
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75 toolexeclibdir='$(toolexecdir)/$(gcc_version)$(MULTISUBDIR)'
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76 ;;
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77 no)
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78 if test -n "$with_cross_host" &&
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79 test x"$with_cross_host" != x"no"; then
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80 # Install a library built with a cross compiler in tooldir, not libdir.
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81 toolexecdir='$(exec_prefix)/$(target_alias)'
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82 toolexeclibdir='$(toolexecdir)/lib'
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83 else
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84 toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
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85 toolexeclibdir='$(libdir)'
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86 fi
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87 multi_os_directory=`$CC -print-multi-os-directory`
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88 case $multi_os_directory in
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89 .) ;; # Avoid trailing /.
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90 *) toolexeclibdir=$toolexeclibdir/$multi_os_directory ;;
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91 esac
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92 ;;
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93 esac
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94 AC_SUBST(toolexecdir)
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95 AC_SUBST(toolexeclibdir)
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96
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97 # Check the compiler.
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98 # The same as in boehm-gc and libstdc++. Have to borrow it from there.
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99 # We must force CC to /not/ be precious variables; otherwise
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100 # the wrong, non-multilib-adjusted value will be used in multilibs.
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101 # As a side effect, we have to subst CFLAGS ourselves.
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102
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103 m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
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104 m4_define([_AC_ARG_VAR_PRECIOUS],[])
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105 AC_PROG_CC
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106 m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
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107
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108 AC_SUBST(CFLAGS)
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109
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110 # In order to override CFLAGS_FOR_TARGET, all of our special flags go
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111 # in XCFLAGS. But we need them in CFLAGS during configury. So put them
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112 # in both places for now and restore CFLAGS at the end of config.
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113 save_CFLAGS="$CFLAGS"
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114
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115 # Add -Wall -Werror if we are using GCC.
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116 if test "x$GCC" = "xyes"; then
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117 XCFLAGS="$XCFLAGS -Wall -Werror"
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118 fi
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119
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120 # Find other programs we need.
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121 AC_CHECK_TOOL(AR, ar)
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122 AC_CHECK_TOOL(RANLIB, ranlib, ranlib-not-found-in-path-error)
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123 AC_PATH_PROG(PERL, perl, perl-not-found-in-path-error)
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124 AC_PROG_MAKE_SET
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125 AC_PROG_INSTALL
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126
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127 # See if makeinfo has been installed and is modern enough
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128 # that we can use it.
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129 ACX_CHECK_PROG_VER([MAKEINFO], [makeinfo], [--version],
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130 [GNU texinfo.* \([0-9][0-9.]*\)],
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131 [4.[4-9]*|4.[1-9][0-9]*|[5-9]*|[1-9][0-9]*])
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132 AM_CONDITIONAL(BUILD_INFO, test $gcc_cv_prog_makeinfo_modern = "yes")
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133
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134
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135 # Configure libtool
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136 AM_PROG_LIBTOOL
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137 AC_SUBST(enable_shared)
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138 AC_SUBST(enable_static)
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139
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140 AM_MAINTAINER_MODE
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141
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142 # We need gfortran to compile parts of the library
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143 # We can't use AC_PROG_FC because it expects a fully working gfortran.
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144 #AC_PROG_FC(gfortran)
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145 FC="$GFORTRAN"
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146 AC_PROG_FC(gfortran)
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147 FCFLAGS="$FCFLAGS -Wall"
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148
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149 # For libtool versioning info, format is CURRENT:REVISION:AGE
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150 libtool_VERSION=1:0:0
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151 AC_SUBST(libtool_VERSION)
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152
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153 # Check header files.
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154 AC_STDC_HEADERS
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155 AC_HEADER_TIME
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156 ACX_HEADER_STRING
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157 AC_CHECK_HEADERS(unistd.h semaphore.h sys/loadavg.h sys/time.h sys/time.h)
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158
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159 GCC_HEADER_STDINT(gstdint.h)
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160
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161 # Check to see if -pthread or -lpthread is needed. Prefer the former.
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162 # In case the pthread.h system header is not found, this test will fail.
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163 XPCFLAGS=""
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164 CFLAGS="$CFLAGS -pthread"
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165 AC_LINK_IFELSE(
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166 [AC_LANG_PROGRAM(
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167 [#include <pthread.h>
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168 void *g(void *d) { return NULL; }],
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169 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
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170 [XPCFLAGS=" -Wc,-pthread"],
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171 [CFLAGS="$save_CFLAGS" LIBS="-lpthread $LIBS"
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172 AC_LINK_IFELSE(
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173 [AC_LANG_PROGRAM(
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174 [#include <pthread.h>
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175 void *g(void *d) { return NULL; }],
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176 [pthread_t t; pthread_create(&t,NULL,g,NULL);])],
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177 [],
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178 [AC_MSG_ERROR([Pthreads are required to build libgomp])])])
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179
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180 # Check for functions needed.
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181 AC_CHECK_FUNCS(getloadavg clock_gettime strtoull)
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182
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183 # Check for broken semaphore implementation on darwin.
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184 # sem_init returns: sem_init error: Function not implemented.
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185 case "$host" in
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186 *-darwin*)
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187 AC_DEFINE(HAVE_BROKEN_POSIX_SEMAPHORES, 1,
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188 Define if the POSIX Semaphores do not work on your system.)
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189 ;;
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190 esac
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191
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192 GCC_LINUX_FUTEX(:)
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193
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194 # Check for pthread_{,attr_}[sg]etaffinity_np.
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195 AC_LINK_IFELSE(
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196 [AC_LANG_PROGRAM(
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197 [#define _GNU_SOURCE
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198 #include <pthread.h>],
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199 [cpu_set_t cpuset;
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200 pthread_attr_t attr;
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201 pthread_getaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
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202 if (CPU_ISSET (0, &cpuset))
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203 CPU_SET (1, &cpuset);
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204 else
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205 CPU_ZERO (&cpuset);
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206 pthread_setaffinity_np (pthread_self (), sizeof (cpu_set_t), &cpuset);
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207 pthread_attr_init (&attr);
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208 pthread_attr_getaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);
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209 pthread_attr_setaffinity_np (&attr, sizeof (cpu_set_t), &cpuset);])],
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210 AC_DEFINE(HAVE_PTHREAD_AFFINITY_NP, 1,
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211 [ Define if pthread_{,attr_}{g,s}etaffinity_np is supported.]))
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212
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213 # At least for glibc, clock_gettime is in librt. But don't pull that
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214 # in if it still doesn't give us the function we want.
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215 if test $ac_cv_func_clock_gettime = no; then
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216 AC_CHECK_LIB(rt, clock_gettime,
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217 [LIBS="-lrt $LIBS"
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218 AC_DEFINE(HAVE_CLOCK_GETTIME, 1,
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219 [Define to 1 if you have the `clock_gettime' function.])])
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220 fi
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221
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222 # See if we support thread-local storage.
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223 GCC_CHECK_TLS
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224
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225 # See what sort of export controls are availible.
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226 LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY
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227 LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT
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228 LIBGOMP_CHECK_ATTRIBUTE_ALIAS
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229 LIBGOMP_ENABLE_SYMVERS
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230
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231 if test $enable_symvers = gnu; then
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232 AC_DEFINE(LIBGOMP_GNU_SYMBOL_VERSIONING, 1,
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233 [Define to 1 if GNU symbol versioning is used for libgomp.])
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234 fi
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235
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236 # Get target configury.
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237 . ${srcdir}/configure.tgt
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238 CFLAGS="$save_CFLAGS $XCFLAGS"
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239
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240 # Check for __sync_val_compare_and_swap, but only after the target has
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241 # had a chance to set XCFLAGS.
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242 LIBGOMP_CHECK_SYNC_BUILTINS
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243
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244 XCFLAGS="$XCFLAGS$XPCFLAGS"
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245
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246 AC_SUBST(config_path)
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247 AC_SUBST(XCFLAGS)
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248 AC_SUBST(XLDFLAGS)
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249
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250 # Cleanup and exit.
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251 CFLAGS="$save_CFLAGS"
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252 AC_CACHE_SAVE
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253
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254 if test ${multilib} = yes; then
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255 multilib_arg="--enable-multilib"
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256 else
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257 multilib_arg=
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258 fi
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259
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260 # Set up the set of libraries that we need to link against for libgomp.
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261 # Note that the GOMP_SELF_SPEC in gcc.c will force -pthread for -fopenmp,
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262 # which will force linkage against -lpthread (or equivalent for the system).
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263 # That's not 100% ideal, but about the best we can do easily.
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264 if test $enable_shared = yes; then
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265 link_gomp="-lgomp %{static: $LIBS}"
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266 else
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267 link_gomp="-lgomp $LIBS"
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268 fi
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269 AC_SUBST(link_gomp)
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270
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271 AM_CONDITIONAL([USE_FORTRAN], [test "$ac_cv_fc_compiler_gnu" = yes])
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272
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273 # ??? 2006-01-24: Paulo committed to asking autoconf folk to document
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274 # and export AC_COMPUTE_INT. If that happens, then we'll need to remove
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275 # the underscore here and update the PREREQ. If it doesn't, then we'll
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276 # need to copy this macro to our acinclude.m4.
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277 save_CFLAGS="$CFLAGS"
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278 for i in $config_path; do
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279 if test -f $srcdir/config/$i/omp-lock.h; then
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280 CFLAGS="$CFLAGS -include confdefs.h -include $srcdir/config/$i/omp-lock.h"
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281 break
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282 fi
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283 done
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284
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285 _AC_COMPUTE_INT([sizeof (omp_lock_t)], [OMP_LOCK_SIZE],,
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286 [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_t)])])
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287 _AC_COMPUTE_INT([__alignof (omp_lock_t)], [OMP_LOCK_ALIGN])
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288 _AC_COMPUTE_INT([sizeof (omp_nest_lock_t)], [OMP_NEST_LOCK_SIZE])
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289 _AC_COMPUTE_INT([__alignof (omp_nest_lock_t)], [OMP_NEST_LOCK_ALIGN])
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290 _AC_COMPUTE_INT([sizeof (omp_lock_25_t)], [OMP_LOCK_25_SIZE],,
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291 [AC_MSG_ERROR([unsupported system, cannot find sizeof (omp_lock_25_t)])])
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292 _AC_COMPUTE_INT([__alignof (omp_lock_25_t)], [OMP_LOCK_25_ALIGN])
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293 _AC_COMPUTE_INT([sizeof (omp_nest_lock_25_t)], [OMP_NEST_LOCK_25_SIZE])
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294 _AC_COMPUTE_INT([__alignof (omp_nest_lock_25_t)], [OMP_NEST_LOCK_25_ALIGN])
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295
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296 # If the lock fits in an integer, then arrange for Fortran to use that
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297 # integer. If it doesn't, then arrange for Fortran to use a pointer.
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298 # Except that we don't have a way at present to multi-lib the installed
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299 # Fortran modules, so we assume 8 bytes for pointers, regardless of the
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300 # actual target.
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301 OMP_LOCK_KIND=$OMP_LOCK_SIZE
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302 OMP_NEST_LOCK_KIND=$OMP_NEST_LOCK_SIZE
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303 if test $OMP_LOCK_SIZE -gt 8 || test $OMP_LOCK_ALIGN -gt $OMP_LOCK_SIZE; then
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304 OMP_LOCK_KIND=8
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305 fi
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306 if test $OMP_NEST_LOCK_SIZE -gt 8 || test $OMP_NEST_LOCK_ALIGN -gt $OMP_NEST_LOCK_SIZE; then
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307 OMP_NEST_LOCK_KIND=8
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308 fi
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309 OMP_LOCK_25_KIND=$OMP_LOCK_25_SIZE
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310 OMP_NEST_LOCK_25_KIND=$OMP_NEST_LOCK_25_SIZE
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311 if test $OMP_LOCK_25_SIZE -gt 8 || test $OMP_LOCK_25_ALIGN -gt $OMP_LOCK_25_SIZE; then
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312 OMP_LOCK_25_KIND=8
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313 fi
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314 if test $OMP_NEST_LOCK_25_SIZE -gt 8 || test $OMP_NEST_LOCK_25_ALIGN -gt $OMP_NEST_LOCK_25_SIZE; then
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315 OMP_NEST_LOCK_25_KIND=8
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316 fi
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317
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318 AC_SUBST(OMP_LOCK_SIZE)
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319 AC_SUBST(OMP_LOCK_ALIGN)
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320 AC_SUBST(OMP_NEST_LOCK_SIZE)
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321 AC_SUBST(OMP_NEST_LOCK_ALIGN)
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322 AC_SUBST(OMP_LOCK_KIND)
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323 AC_SUBST(OMP_NEST_LOCK_KIND)
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324 AC_SUBST(OMP_LOCK_25_SIZE)
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325 AC_SUBST(OMP_LOCK_25_ALIGN)
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326 AC_SUBST(OMP_NEST_LOCK_25_SIZE)
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327 AC_SUBST(OMP_NEST_LOCK_25_ALIGN)
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328 AC_SUBST(OMP_LOCK_25_KIND)
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329 AC_SUBST(OMP_NEST_LOCK_25_KIND)
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330 CFLAGS="$save_CFLAGS"
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331
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332 AC_CONFIG_FILES(omp.h omp_lib.h omp_lib.f90 libgomp_f.h)
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333 AC_CONFIG_FILES(Makefile testsuite/Makefile libgomp.spec)
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334 AC_OUTPUT
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