Mercurial > octave
annotate m4/ax_pthread.m4 @ 31130:0c637fa9529a
build: Search for python executable with multiple names (bug #62372)
* m4/acinclude.m4 (OCTAVE_PROG_PYTHON): Switch to AC_CHECK_PROGS and search for
a range of possible names for python executable.
author | Rik <rik@octave.org> |
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date | Sat, 09 Jul 2022 09:58:02 -0700 |
parents | 9d2a4a270807 |
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rev | line source |
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9497 | 1 # =========================================================================== |
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2 # https://www.gnu.org/software/autoconf-archive/ax_pthread.html |
9497 | 3 # =========================================================================== |
4 # | |
5 # SYNOPSIS | |
6 # | |
10951 | 7 # AX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) |
9497 | 8 # |
9 # DESCRIPTION | |
10 # | |
11 # This macro figures out how to build C programs using POSIX threads. It | |
12 # sets the PTHREAD_LIBS output variable to the threads library and linker | |
13 # flags, and the PTHREAD_CFLAGS output variable to any special C compiler | |
14 # flags that are needed. (The user can also force certain compiler | |
15 # flags/libs to be tested by setting these environment variables.) | |
16 # | |
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17 # Also sets PTHREAD_CC and PTHREAD_CXX to any special C compiler that is |
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18 # needed for multi-threaded programs (defaults to the value of CC |
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19 # respectively CXX otherwise). (This is necessary on e.g. AIX to use the |
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20 # special cc_r/CC_r compiler alias.) |
9497 | 21 # |
22 # NOTE: You are assumed to not only compile your program with these flags, | |
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23 # but also to link with them as well. For example, you might link with |
9497 | 24 # $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS |
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25 # $PTHREAD_CXX $CXXFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS |
9497 | 26 # |
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27 # If you are only building threaded programs, you may wish to use these |
9497 | 28 # variables in your default LIBS, CFLAGS, and CC: |
29 # | |
10951 | 30 # LIBS="$PTHREAD_LIBS $LIBS" |
31 # CFLAGS="$CFLAGS $PTHREAD_CFLAGS" | |
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32 # CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS" |
10951 | 33 # CC="$PTHREAD_CC" |
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34 # CXX="$PTHREAD_CXX" |
9497 | 35 # |
36 # In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant | |
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37 # has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to |
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38 # that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX). |
9497 | 39 # |
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40 # Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the |
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41 # PTHREAD_PRIO_INHERIT symbol is defined when compiling with |
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42 # PTHREAD_CFLAGS. |
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43 # |
9497 | 44 # ACTION-IF-FOUND is a list of shell commands to run if a threads library |
45 # is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it | |
46 # is not found. If ACTION-IF-FOUND is not specified, the default action | |
47 # will define HAVE_PTHREAD. | |
48 # | |
49 # Please let the authors know if this macro fails on any platform, or if | |
50 # you have any other suggestions or comments. This macro was based on work | |
51 # by SGJ on autoconf scripts for FFTW (http://www.fftw.org/) (with help | |
52 # from M. Frigo), as well as ac_pthread and hb_pthread macros posted by | |
53 # Alejandro Forero Cuervo to the autoconf macro repository. We are also | |
54 # grateful for the helpful feedback of numerous users. | |
55 # | |
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56 # Updated for Autoconf 2.68 by Daniel Richard G. |
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57 # |
9497 | 58 # LICENSE |
59 # | |
60 # Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu> | |
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61 # Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG> |
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62 # Copyright (c) 2019 Marc Stevens <marc.stevens@cwi.nl> |
9497 | 63 # |
64 # This program is free software: you can redistribute it and/or modify it | |
65 # under the terms of the GNU General Public License as published by the | |
66 # Free Software Foundation, either version 3 of the License, or (at your | |
67 # option) any later version. | |
68 # | |
69 # This program is distributed in the hope that it will be useful, but | |
70 # WITHOUT ANY WARRANTY; without even the implied warranty of | |
71 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General | |
72 # Public License for more details. | |
73 # | |
74 # You should have received a copy of the GNU General Public License along | |
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75 # with this program. If not, see <https://www.gnu.org/licenses/>. |
9497 | 76 # |
77 # As a special exception, the respective Autoconf Macro's copyright owner | |
78 # gives unlimited permission to copy, distribute and modify the configure | |
79 # scripts that are the output of Autoconf when processing the Macro. You | |
80 # need not follow the terms of the GNU General Public License when using | |
81 # or distributing such scripts, even though portions of the text of the | |
82 # Macro appear in them. The GNU General Public License (GPL) does govern | |
83 # all other use of the material that constitutes the Autoconf Macro. | |
84 # | |
85 # This special exception to the GPL applies to versions of the Autoconf | |
86 # Macro released by the Autoconf Archive. When you make and distribute a | |
87 # modified version of the Autoconf Macro, you may extend this special | |
88 # exception to the GPL to apply to your modified version as well. | |
89 | |
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90 #serial 31 |
10951 | 91 |
92 AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD]) | |
93 AC_DEFUN([AX_PTHREAD], [ | |
9497 | 94 AC_REQUIRE([AC_CANONICAL_HOST]) |
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95 AC_REQUIRE([AC_PROG_CC]) |
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96 AC_REQUIRE([AC_PROG_SED]) |
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97 AC_LANG_PUSH([C]) |
10951 | 98 ax_pthread_ok=no |
9497 | 99 |
100 # We used to check for pthread.h first, but this fails if pthread.h | |
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101 # requires special compiler flags (e.g. on Tru64 or Sequent). |
9497 | 102 # It gets checked for in the link test anyway. |
103 | |
104 # First of all, check if the user has set any of the PTHREAD_LIBS, | |
105 # etcetera environment variables, and if threads linking works using | |
106 # them: | |
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107 if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then |
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108 ax_pthread_save_CC="$CC" |
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109 ax_pthread_save_CFLAGS="$CFLAGS" |
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110 ax_pthread_save_LIBS="$LIBS" |
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111 AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"]) |
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112 AS_IF([test "x$PTHREAD_CXX" != "x"], [CXX="$PTHREAD_CXX"]) |
9497 | 113 CFLAGS="$CFLAGS $PTHREAD_CFLAGS" |
114 LIBS="$PTHREAD_LIBS $LIBS" | |
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115 AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS]) |
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116 AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes]) |
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117 AC_MSG_RESULT([$ax_pthread_ok]) |
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118 if test "x$ax_pthread_ok" = "xno"; then |
9497 | 119 PTHREAD_LIBS="" |
120 PTHREAD_CFLAGS="" | |
121 fi | |
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122 CC="$ax_pthread_save_CC" |
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123 CFLAGS="$ax_pthread_save_CFLAGS" |
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124 LIBS="$ax_pthread_save_LIBS" |
9497 | 125 fi |
126 | |
127 # We must check for the threads library under a number of different | |
128 # names; the ordering is very important because some systems | |
129 # (e.g. DEC) have both -lpthread and -lpthreads, where one of the | |
130 # libraries is broken (non-POSIX). | |
131 | |
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132 # Create a list of thread flags to try. Items with a "," contain both |
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133 # C compiler flags (before ",") and linker flags (after ","). Other items |
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134 # starting with a "-" are C compiler flags, and remaining items are |
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135 # library names, except for "none" which indicates that we try without |
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136 # any flags at all, and "pthread-config" which is a program returning |
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137 # the flags for the Pth emulation library. |
9497 | 138 |
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139 ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config" |
9497 | 140 |
141 # The ordering *is* (sometimes) important. Some notes on the | |
142 # individual items follow: | |
143 | |
144 # pthreads: AIX (must check this before -lpthread) | |
145 # none: in case threads are in libc; should be tried before -Kthread and | |
146 # other compiler flags to prevent continual compiler warnings | |
147 # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h) | |
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148 # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64 |
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149 # (Note: HP C rejects this with "bad form for `-t' option") |
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150 # -pthreads: Solaris/gcc (Note: HP C also rejects) |
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151 # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it |
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152 # doesn't hurt to check since this sometimes defines pthreads and |
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153 # -D_REENTRANT too), HP C (must be checked before -lpthread, which |
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154 # is present but should not be used directly; and before -mthreads, |
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155 # because the compiler interprets this as "-mt" + "-hreads") |
9497 | 156 # -mthreads: Mingw32/gcc, Lynx/gcc |
157 # pthread: Linux, etcetera | |
158 # --thread-safe: KAI C++ | |
159 # pthread-config: use pthread-config program (for GNU Pth library) | |
160 | |
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161 case $host_os in |
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162 |
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163 freebsd*) |
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164 |
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165 # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) |
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166 # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) |
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167 |
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168 ax_pthread_flags="-kthread lthread $ax_pthread_flags" |
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169 ;; |
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170 |
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171 hpux*) |
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172 |
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173 # From the cc(1) man page: "[-mt] Sets various -D flags to enable |
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174 # multi-threading and also sets -lpthread." |
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175 |
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176 ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags" |
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177 ;; |
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178 |
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179 openedition*) |
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180 |
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181 # IBM z/OS requires a feature-test macro to be defined in order to |
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182 # enable POSIX threads at all, so give the user a hint if this is |
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183 # not set. (We don't define these ourselves, as they can affect |
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184 # other portions of the system API in unpredictable ways.) |
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185 |
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186 AC_EGREP_CPP([AX_PTHREAD_ZOS_MISSING], |
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187 [ |
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188 # if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS) |
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189 AX_PTHREAD_ZOS_MISSING |
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190 # endif |
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191 ], |
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192 [AC_MSG_WARN([IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support.])]) |
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193 ;; |
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194 |
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195 solaris*) |
9497 | 196 |
197 # On Solaris (at least, for some versions), libc contains stubbed | |
198 # (non-functional) versions of the pthreads routines, so link-based | |
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199 # tests will erroneously succeed. (N.B.: The stubs are missing |
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200 # pthread_cleanup_push, or rather a function called by this macro, |
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201 # so we could check for that, but who knows whether they'll stub |
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202 # that too in a future libc.) So we'll check first for the |
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203 # standard Solaris way of linking pthreads (-mt -lpthread). |
9497 | 204 |
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205 ax_pthread_flags="-mt,-lpthread pthread $ax_pthread_flags" |
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206 ;; |
9497 | 207 esac |
208 | |
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209 # Are we compiling with Clang? |
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210 |
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211 AC_CACHE_CHECK([whether $CC is Clang], |
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212 [ax_cv_PTHREAD_CLANG], |
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213 [ax_cv_PTHREAD_CLANG=no |
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214 # Note that Autoconf sets GCC=yes for Clang as well as GCC |
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215 if test "x$GCC" = "xyes"; then |
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216 AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG], |
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217 [/* Note: Clang 2.7 lacks __clang_[a-z]+__ */ |
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218 # if defined(__clang__) && defined(__llvm__) |
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219 AX_PTHREAD_CC_IS_CLANG |
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220 # endif |
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221 ], |
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222 [ax_cv_PTHREAD_CLANG=yes]) |
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223 fi |
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224 ]) |
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225 ax_pthread_clang="$ax_cv_PTHREAD_CLANG" |
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226 |
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227 |
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228 # GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC) |
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229 |
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230 # Note that for GCC and Clang -pthread generally implies -lpthread, |
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231 # except when -nostdlib is passed. |
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232 # This is problematic using libtool to build C++ shared libraries with pthread: |
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233 # [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460 |
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234 # [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333 |
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235 # [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555 |
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236 # To solve this, first try -pthread together with -lpthread for GCC |
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237 |
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238 AS_IF([test "x$GCC" = "xyes"], |
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239 [ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"]) |
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240 |
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241 # Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first |
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242 |
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243 AS_IF([test "x$ax_pthread_clang" = "xyes"], |
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244 [ax_pthread_flags="-pthread,-lpthread -pthread"]) |
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245 |
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246 |
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247 # The presence of a feature test macro requesting re-entrant function |
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248 # definitions is, on some systems, a strong hint that pthreads support is |
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249 # correctly enabled |
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250 |
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251 case $host_os in |
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252 darwin* | hpux* | linux* | osf* | solaris*) |
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253 ax_pthread_check_macro="_REENTRANT" |
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254 ;; |
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255 |
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256 aix*) |
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257 ax_pthread_check_macro="_THREAD_SAFE" |
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258 ;; |
9497 | 259 |
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260 *) |
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261 ax_pthread_check_macro="--" |
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262 ;; |
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263 esac |
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264 AS_IF([test "x$ax_pthread_check_macro" = "x--"], |
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265 [ax_pthread_check_cond=0], |
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266 [ax_pthread_check_cond="!defined($ax_pthread_check_macro)"]) |
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267 |
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268 |
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269 if test "x$ax_pthread_ok" = "xno"; then |
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270 for ax_pthread_try_flag in $ax_pthread_flags; do |
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271 |
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272 case $ax_pthread_try_flag in |
9497 | 273 none) |
274 AC_MSG_CHECKING([whether pthreads work without any flags]) | |
275 ;; | |
276 | |
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277 *,*) |
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278 PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"` |
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279 PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"` |
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280 AC_MSG_CHECKING([whether pthreads work with "$PTHREAD_CFLAGS" and "$PTHREAD_LIBS"]) |
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281 ;; |
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282 |
9497 | 283 -*) |
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284 AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag]) |
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285 PTHREAD_CFLAGS="$ax_pthread_try_flag" |
9497 | 286 ;; |
287 | |
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288 pthread-config) |
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289 AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no]) |
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290 AS_IF([test "x$ax_pthread_config" = "xno"], [continue]) |
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291 PTHREAD_CFLAGS="`pthread-config --cflags`" |
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292 PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" |
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293 ;; |
9497 | 294 |
295 *) | |
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296 AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag]) |
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297 PTHREAD_LIBS="-l$ax_pthread_try_flag" |
9497 | 298 ;; |
299 esac | |
300 | |
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301 ax_pthread_save_CFLAGS="$CFLAGS" |
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302 ax_pthread_save_LIBS="$LIBS" |
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303 CFLAGS="$CFLAGS $PTHREAD_CFLAGS" |
9497 | 304 LIBS="$PTHREAD_LIBS $LIBS" |
305 | |
306 # Check for various functions. We must include pthread.h, | |
307 # since some functions may be macros. (On the Sequent, we | |
308 # need a special flag -Kthread to make this header compile.) | |
309 # We check for pthread_join because it is in -lpthread on IRIX | |
310 # while pthread_create is in libc. We check for pthread_attr_init | |
311 # due to DEC craziness with -lpthreads. We check for | |
312 # pthread_cleanup_push because it is one of the few pthread | |
313 # functions on Solaris that doesn't have a non-functional libc stub. | |
314 # We try pthread_create on general principles. | |
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315 |
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316 AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h> |
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317 # if $ax_pthread_check_cond |
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318 # error "$ax_pthread_check_macro must be defined" |
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319 # endif |
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320 static void *some_global = NULL; |
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321 static void routine(void *a) |
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322 { |
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323 /* To avoid any unused-parameter or |
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324 unused-but-set-parameter warning. */ |
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325 some_global = a; |
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326 } |
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327 static void *start_routine(void *a) { return a; }], |
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328 [pthread_t th; pthread_attr_t attr; |
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329 pthread_create(&th, 0, start_routine, 0); |
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330 pthread_join(th, 0); |
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331 pthread_attr_init(&attr); |
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332 pthread_cleanup_push(routine, 0); |
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333 pthread_cleanup_pop(0) /* ; */])], |
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334 [ax_pthread_ok=yes], |
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335 []) |
9497 | 336 |
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337 CFLAGS="$ax_pthread_save_CFLAGS" |
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338 LIBS="$ax_pthread_save_LIBS" |
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340 AC_MSG_RESULT([$ax_pthread_ok]) |
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341 AS_IF([test "x$ax_pthread_ok" = "xyes"], [break]) |
9497 | 342 |
343 PTHREAD_LIBS="" | |
344 PTHREAD_CFLAGS="" | |
345 done | |
346 fi | |
347 | |
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348 |
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349 # Clang needs special handling, because older versions handle the -pthread |
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350 # option in a rather... idiosyncratic way |
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351 |
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352 if test "x$ax_pthread_clang" = "xyes"; then |
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353 |
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354 # Clang takes -pthread; it has never supported any other flag |
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355 |
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356 # (Note 1: This will need to be revisited if a system that Clang |
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357 # supports has POSIX threads in a separate library. This tends not |
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358 # to be the way of modern systems, but it's conceivable.) |
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359 |
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360 # (Note 2: On some systems, notably Darwin, -pthread is not needed |
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361 # to get POSIX threads support; the API is always present and |
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362 # active. We could reasonably leave PTHREAD_CFLAGS empty. But |
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363 # -pthread does define _REENTRANT, and while the Darwin headers |
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364 # ignore this macro, third-party headers might not.) |
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365 |
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366 # However, older versions of Clang make a point of warning the user |
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367 # that, in an invocation where only linking and no compilation is |
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368 # taking place, the -pthread option has no effect ("argument unused |
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369 # during compilation"). They expect -pthread to be passed in only |
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370 # when source code is being compiled. |
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371 # |
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372 # Problem is, this is at odds with the way Automake and most other |
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373 # C build frameworks function, which is that the same flags used in |
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374 # compilation (CFLAGS) are also used in linking. Many systems |
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375 # supported by AX_PTHREAD require exactly this for POSIX threads |
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376 # support, and in fact it is often not straightforward to specify a |
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377 # flag that is used only in the compilation phase and not in |
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378 # linking. Such a scenario is extremely rare in practice. |
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379 # |
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380 # Even though use of the -pthread flag in linking would only print |
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381 # a warning, this can be a nuisance for well-run software projects |
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382 # that build with -Werror. So if the active version of Clang has |
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383 # this misfeature, we search for an option to squash it. |
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384 |
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385 AC_CACHE_CHECK([whether Clang needs flag to prevent "argument unused" warning when linking with -pthread], |
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386 [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG], |
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387 [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown |
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388 # Create an alternate version of $ac_link that compiles and |
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389 # links in two steps (.c -> .o, .o -> exe) instead of one |
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390 # (.c -> exe), because the warning occurs only in the second |
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391 # step |
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392 ax_pthread_save_ac_link="$ac_link" |
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393 ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g' |
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394 ax_pthread_link_step=`AS_ECHO(["$ac_link"]) | sed "$ax_pthread_sed"` |
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395 ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)" |
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396 ax_pthread_save_CFLAGS="$CFLAGS" |
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397 for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do |
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398 AS_IF([test "x$ax_pthread_try" = "xunknown"], [break]) |
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399 CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS" |
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400 ac_link="$ax_pthread_save_ac_link" |
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401 AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])], |
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402 [ac_link="$ax_pthread_2step_ac_link" |
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403 AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])], |
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404 [break]) |
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405 ]) |
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406 done |
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407 ac_link="$ax_pthread_save_ac_link" |
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408 CFLAGS="$ax_pthread_save_CFLAGS" |
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409 AS_IF([test "x$ax_pthread_try" = "x"], [ax_pthread_try=no]) |
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410 ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try" |
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411 ]) |
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412 |
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413 case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in |
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414 no | unknown) ;; |
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415 *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;; |
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416 esac |
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417 |
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418 fi # $ax_pthread_clang = yes |
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419 |
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420 |
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421 |
9497 | 422 # Various other checks: |
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423 if test "x$ax_pthread_ok" = "xyes"; then |
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424 ax_pthread_save_CFLAGS="$CFLAGS" |
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425 ax_pthread_save_LIBS="$LIBS" |
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426 CFLAGS="$CFLAGS $PTHREAD_CFLAGS" |
9497 | 427 LIBS="$PTHREAD_LIBS $LIBS" |
428 | |
429 # Detect AIX lossage: JOINABLE attribute is called UNDETACHED. | |
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430 AC_CACHE_CHECK([for joinable pthread attribute], |
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431 [ax_cv_PTHREAD_JOINABLE_ATTR], |
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432 [ax_cv_PTHREAD_JOINABLE_ATTR=unknown |
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433 for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do |
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434 AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>], |
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435 [int attr = $ax_pthread_attr; return attr /* ; */])], |
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436 [ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break], |
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437 []) |
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438 done |
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439 ]) |
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440 AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \ |
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441 test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \ |
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442 test "x$ax_pthread_joinable_attr_defined" != "xyes"], |
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443 [AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE], |
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444 [$ax_cv_PTHREAD_JOINABLE_ATTR], |
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445 [Define to necessary symbol if this constant |
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446 uses a non-standard name on your system.]) |
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447 ax_pthread_joinable_attr_defined=yes |
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448 ]) |
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450 AC_CACHE_CHECK([whether more special flags are required for pthreads], |
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451 [ax_cv_PTHREAD_SPECIAL_FLAGS], |
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452 [ax_cv_PTHREAD_SPECIAL_FLAGS=no |
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453 case $host_os in |
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454 solaris*) |
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455 ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS" |
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456 ;; |
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457 esac |
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458 ]) |
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459 AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \ |
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460 test "x$ax_pthread_special_flags_added" != "xyes"], |
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461 [PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS" |
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462 ax_pthread_special_flags_added=yes]) |
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464 AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT], |
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465 [ax_cv_PTHREAD_PRIO_INHERIT], |
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466 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], |
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467 [[int i = PTHREAD_PRIO_INHERIT; |
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468 return i;]])], |
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469 [ax_cv_PTHREAD_PRIO_INHERIT=yes], |
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470 [ax_cv_PTHREAD_PRIO_INHERIT=no]) |
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471 ]) |
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472 AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \ |
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473 test "x$ax_pthread_prio_inherit_defined" != "xyes"], |
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474 [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.]) |
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475 ax_pthread_prio_inherit_defined=yes |
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476 ]) |
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477 |
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478 CFLAGS="$ax_pthread_save_CFLAGS" |
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479 LIBS="$ax_pthread_save_LIBS" |
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481 # More AIX lossage: compile with *_r variant |
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482 if test "x$GCC" != "xyes"; then |
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483 case $host_os in |
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484 aix*) |
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485 AS_CASE(["x/$CC"], |
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486 [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6], |
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487 [#handle absolute path differently from PATH based program lookup |
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488 AS_CASE(["x$CC"], |
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489 [x/*], |
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490 [ |
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491 AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"]) |
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492 AS_IF([test "x${CXX}" != "x"], [AS_IF([AS_EXECUTABLE_P([${CXX}_r])],[PTHREAD_CXX="${CXX}_r"])]) |
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493 ], |
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494 [ |
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495 AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC]) |
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496 AS_IF([test "x${CXX}" != "x"], [AC_CHECK_PROGS([PTHREAD_CXX],[${CXX}_r],[$CXX])]) |
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497 ] |
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498 ) |
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499 ]) |
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500 ;; |
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501 esac |
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502 fi |
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504 | |
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505 test -n "$PTHREAD_CC" || PTHREAD_CC="$CC" |
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506 test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX" |
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507 |
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508 AC_SUBST([PTHREAD_LIBS]) |
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509 AC_SUBST([PTHREAD_CFLAGS]) |
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510 AC_SUBST([PTHREAD_CC]) |
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511 AC_SUBST([PTHREAD_CXX]) |
9497 | 512 |
513 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: | |
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514 if test "x$ax_pthread_ok" = "xyes"; then |
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515 ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1]) |
9497 | 516 : |
517 else | |
10951 | 518 ax_pthread_ok=no |
9497 | 519 $2 |
520 fi | |
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521 AC_LANG_POP |
10951 | 522 ])dnl AX_PTHREAD |