Changeset 26102e in git
- Timestamp:
- Nov 15, 2016, 3:24:54 PM (7 years ago)
- Branches:
- (u'spielwiese', 'fe61d9c35bf7c61f2b6cbf1b56e25e2f08d536cc')
- Children:
- 99d898f8fea12000aad60ac8b2dbce9e4536d2ba
- Parents:
- 895ba2662ac351e7ae9a9f15027a52e48c6bea77
- File:
-
- 1 edited
-
m4/ax_pthread.m4 (modified) (11 diffs)
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- Unmodified
- Added
- Removed
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m4/ax_pthread.m4
r895ba26 r26102e 20 20 # 21 21 # NOTE: You are assumed to not only compile your program with these flags, 22 # but also link it with them as well. e.g. you shouldlink with22 # but also to link with them as well. For example, you might link with 23 23 # $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS 24 24 # 25 # If you are only building thread sprograms, you may wish to use these25 # If you are only building threaded programs, you may wish to use these 26 26 # variables in your default LIBS, CFLAGS, and CC: 27 27 # … … 31 31 # 32 32 # In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant 33 # has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to that name34 # (e.g. PTHREAD_CREATE_UNDETACHED on AIX).33 # has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to 34 # that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX). 35 35 # 36 36 # Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the … … 83 83 # exception to the GPL to apply to your modified version as well. 84 84 85 #serial 2 185 #serial 23 86 86 87 87 AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD]) 88 88 AC_DEFUN([AX_PTHREAD], [ 89 89 AC_REQUIRE([AC_CANONICAL_HOST]) 90 AC_REQUIRE([AC_PROG_CC]) 91 AC_REQUIRE([AC_PROG_SED]) 90 92 AC_LANG_PUSH([C]) 91 93 ax_pthread_ok=no 92 94 93 95 # We used to check for pthread.h first, but this fails if pthread.h 94 # requires special compiler flags (e.g. on Tru e64 or Sequent).96 # requires special compiler flags (e.g. on Tru64 or Sequent). 95 97 # It gets checked for in the link test anyway. 96 98 … … 98 100 # etcetera environment variables, and if threads linking works using 99 101 # them: 100 if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then 101 save_CFLAGS="$CFLAGS" 102 if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then 103 ax_pthread_save_CC="$CC" 104 ax_pthread_save_CFLAGS="$CFLAGS" 105 ax_pthread_save_LIBS="$LIBS" 106 AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"]) 102 107 CFLAGS="$CFLAGS $PTHREAD_CFLAGS" 103 save_LIBS="$LIBS"104 108 LIBS="$PTHREAD_LIBS $LIBS" 105 AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])106 AC_ TRY_LINK_FUNC([pthread_join], [ax_pthread_ok=yes])109 AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS]) 110 AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes]) 107 111 AC_MSG_RESULT([$ax_pthread_ok]) 108 if test x"$ax_pthread_ok" = xno; then112 if test "x$ax_pthread_ok" = "xno"; then 109 113 PTHREAD_LIBS="" 110 114 PTHREAD_CFLAGS="" 111 115 fi 112 LIBS="$save_LIBS" 113 CFLAGS="$save_CFLAGS" 116 CC="$ax_pthread_save_CC" 117 CFLAGS="$ax_pthread_save_CFLAGS" 118 LIBS="$ax_pthread_save_LIBS" 114 119 fi 115 120 … … 124 129 # which is a program returning the flags for the Pth emulation library. 125 130 126 ax_pthread_flags="pthreads none -Kthread - kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"131 ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config" 127 132 128 133 # The ordering *is* (sometimes) important. Some notes on the … … 133 138 # other compiler flags to prevent continual compiler warnings 134 139 # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h) 135 # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) 136 # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) 137 # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads) 138 # -pthreads: Solaris/gcc 140 # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64 141 # (Note: HP C rejects this with "bad form for `-t' option") 142 # -pthreads: Solaris/gcc (Note: HP C also rejects) 143 # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it 144 # doesn't hurt to check since this sometimes defines pthreads and 145 # -D_REENTRANT too), HP C (must be checked before -lpthread, which 146 # is present but should not be used directly; and before -mthreads, 147 # because the compiler interprets this as "-mt" + "-hreads") 139 148 # -mthreads: Mingw32/gcc, Lynx/gcc 140 # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it141 # doesn't hurt to check since this sometimes defines pthreads too;142 # also defines -D_REENTRANT)143 # ... -mt is also the pthreads flag for HP/aCC144 149 # pthread: Linux, etcetera 145 150 # --thread-safe: KAI C++ 146 151 # pthread-config: use pthread-config program (for GNU Pth library) 147 152 148 case ${host_os} in 153 case $host_os in 154 155 freebsd*) 156 157 # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) 158 # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) 159 160 ax_pthread_flags="-kthread lthread $ax_pthread_flags" 161 ;; 162 163 hpux*) 164 165 # From the cc(1) man page: "[-mt] Sets various -D flags to enable 166 # multi-threading and also sets -lpthread." 167 168 ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags" 169 ;; 170 171 openedition*) 172 173 # IBM z/OS requires a feature-test macro to be defined in order to 174 # enable POSIX threads at all, so give the user a hint if this is 175 # not set. (We don't define these ourselves, as they can affect 176 # other portions of the system API in unpredictable ways.) 177 178 AC_EGREP_CPP([AX_PTHREAD_ZOS_MISSING], 179 [ 180 # if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS) 181 AX_PTHREAD_ZOS_MISSING 182 # endif 183 ], 184 [AC_MSG_WARN([IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support.])]) 185 ;; 186 149 187 solaris*) 150 188 151 189 # On Solaris (at least, for some versions), libc contains stubbed 152 190 # (non-functional) versions of the pthreads routines, so link-based 153 # tests will erroneously succeed. (We need to link with -pthreads/-mt/ 154 # -lpthread.) (The stubs are missing pthread_cleanup_push, or rather 155 # a function called by this macro, so we could check for that, but 156 # who knows whether they'll stub that too in a future libc.) So, 157 # we'll just look for -pthreads and -lpthread first: 158 159 ax_pthread_flags="-pthreads pthread -mt -pthread $ax_pthread_flags" 160 ;; 161 162 darwin*) 163 ax_pthread_flags="-pthread $ax_pthread_flags" 191 # tests will erroneously succeed. (N.B.: The stubs are missing 192 # pthread_cleanup_push, or rather a function called by this macro, 193 # so we could check for that, but who knows whether they'll stub 194 # that too in a future libc.) So we'll check first for the 195 # standard Solaris way of linking pthreads (-mt -lpthread). 196 197 ax_pthread_flags="-mt,pthread pthread $ax_pthread_flags" 164 198 ;; 165 199 esac 166 200 167 # Clang doesn't consider unrecognized options an error unless we specify 168 # -Werror. We throw in some extra Clang-specific options to ensure that 169 # this doesn't happen for GCC, which also accepts -Werror. 170 171 AC_MSG_CHECKING([if compiler needs -Werror to reject unknown flags]) 172 save_CFLAGS="$CFLAGS" 173 ax_pthread_extra_flags="-Werror" 174 CFLAGS="$CFLAGS $ax_pthread_extra_flags -Wunknown-warning-option -Wsizeof-array-argument" 175 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([int foo(void);],[foo()])], 176 [AC_MSG_RESULT([yes])], 177 [ax_pthread_extra_flags= 178 AC_MSG_RESULT([no])]) 179 CFLAGS="$save_CFLAGS" 180 181 if test x"$ax_pthread_ok" = xno; then 182 for flag in $ax_pthread_flags; do 183 184 case $flag in 201 # GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC) 202 203 AS_IF([test "x$GCC" = "xyes"], 204 [ax_pthread_flags="-pthread -pthreads $ax_pthread_flags"]) 205 206 # The presence of a feature test macro requesting re-entrant function 207 # definitions is, on some systems, a strong hint that pthreads support is 208 # correctly enabled 209 210 case $host_os in 211 darwin* | hpux* | linux* | osf* | solaris*) 212 ax_pthread_check_macro="_REENTRANT" 213 ;; 214 215 aix*) 216 ax_pthread_check_macro="_THREAD_SAFE" 217 ;; 218 219 *) 220 ax_pthread_check_macro="--" 221 ;; 222 esac 223 AS_IF([test "x$ax_pthread_check_macro" = "x--"], 224 [ax_pthread_check_cond=0], 225 [ax_pthread_check_cond="!defined($ax_pthread_check_macro)"]) 226 227 # Are we compiling with Clang? 228 229 AC_CACHE_CHECK([whether $CC is Clang], 230 [ax_cv_PTHREAD_CLANG], 231 [ax_cv_PTHREAD_CLANG=no 232 # Note that Autoconf sets GCC=yes for Clang as well as GCC 233 if test "x$GCC" = "xyes"; then 234 AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG], 235 [/* Note: Clang 2.7 lacks __clang_[a-z]+__ */ 236 # if defined(__clang__) && defined(__llvm__) 237 AX_PTHREAD_CC_IS_CLANG 238 # endif 239 ], 240 [ax_cv_PTHREAD_CLANG=yes]) 241 fi 242 ]) 243 ax_pthread_clang="$ax_cv_PTHREAD_CLANG" 244 245 ax_pthread_clang_warning=no 246 247 # Clang needs special handling, because older versions handle the -pthread 248 # option in a rather... idiosyncratic way 249 250 if test "x$ax_pthread_clang" = "xyes"; then 251 252 # Clang takes -pthread; it has never supported any other flag 253 254 # (Note 1: This will need to be revisited if a system that Clang 255 # supports has POSIX threads in a separate library. This tends not 256 # to be the way of modern systems, but it's conceivable.) 257 258 # (Note 2: On some systems, notably Darwin, -pthread is not needed 259 # to get POSIX threads support; the API is always present and 260 # active. We could reasonably leave PTHREAD_CFLAGS empty. But 261 # -pthread does define _REENTRANT, and while the Darwin headers 262 # ignore this macro, third-party headers might not.) 263 264 PTHREAD_CFLAGS="-pthread" 265 PTHREAD_LIBS= 266 267 ax_pthread_ok=yes 268 269 # However, older versions of Clang make a point of warning the user 270 # that, in an invocation where only linking and no compilation is 271 # taking place, the -pthread option has no effect ("argument unused 272 # during compilation"). They expect -pthread to be passed in only 273 # when source code is being compiled. 274 # 275 # Problem is, this is at odds with the way Automake and most other 276 # C build frameworks function, which is that the same flags used in 277 # compilation (CFLAGS) are also used in linking. Many systems 278 # supported by AX_PTHREAD require exactly this for POSIX threads 279 # support, and in fact it is often not straightforward to specify a 280 # flag that is used only in the compilation phase and not in 281 # linking. Such a scenario is extremely rare in practice. 282 # 283 # Even though use of the -pthread flag in linking would only print 284 # a warning, this can be a nuisance for well-run software projects 285 # that build with -Werror. So if the active version of Clang has 286 # this misfeature, we search for an option to squash it. 287 288 AC_CACHE_CHECK([whether Clang needs flag to prevent "argument unused" warning when linking with -pthread], 289 [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG], 290 [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown 291 # Create an alternate version of $ac_link that compiles and 292 # links in two steps (.c -> .o, .o -> exe) instead of one 293 # (.c -> exe), because the warning occurs only in the second 294 # step 295 ax_pthread_save_ac_link="$ac_link" 296 ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g' 297 ax_pthread_link_step=`$as_echo "$ac_link" | sed "$ax_pthread_sed"` 298 ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)" 299 ax_pthread_save_CFLAGS="$CFLAGS" 300 for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do 301 AS_IF([test "x$ax_pthread_try" = "xunknown"], [break]) 302 CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS" 303 ac_link="$ax_pthread_save_ac_link" 304 AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])], 305 [ac_link="$ax_pthread_2step_ac_link" 306 AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])], 307 [break]) 308 ]) 309 done 310 ac_link="$ax_pthread_save_ac_link" 311 CFLAGS="$ax_pthread_save_CFLAGS" 312 AS_IF([test "x$ax_pthread_try" = "x"], [ax_pthread_try=no]) 313 ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try" 314 ]) 315 316 case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in 317 no | unknown) ;; 318 *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;; 319 esac 320 321 fi # $ax_pthread_clang = yes 322 323 if test "x$ax_pthread_ok" = "xno"; then 324 for ax_pthread_try_flag in $ax_pthread_flags; do 325 326 case $ax_pthread_try_flag in 185 327 none) 186 328 AC_MSG_CHECKING([whether pthreads work without any flags]) 187 329 ;; 188 330 331 -mt,pthread) 332 AC_MSG_CHECKING([whether pthreads work with -mt -lpthread]) 333 PTHREAD_CFLAGS="-mt" 334 PTHREAD_LIBS="-lpthread" 335 ;; 336 189 337 -*) 190 AC_MSG_CHECKING([whether pthreads work with $ flag])191 PTHREAD_CFLAGS="$ flag"338 AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag]) 339 PTHREAD_CFLAGS="$ax_pthread_try_flag" 192 340 ;; 193 341 194 342 pthread-config) 195 343 AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no]) 196 if test x"$ax_pthread_config" = xno; then continue; fi344 AS_IF([test "x$ax_pthread_config" = "xno"], [continue]) 197 345 PTHREAD_CFLAGS="`pthread-config --cflags`" 198 346 PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" … … 200 348 201 349 *) 202 AC_MSG_CHECKING([for the pthreads library -l$ flag])203 PTHREAD_LIBS="-l$ flag"350 AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag]) 351 PTHREAD_LIBS="-l$ax_pthread_try_flag" 204 352 ;; 205 353 esac 206 354 207 save_LIBS="$LIBS" 208 save_CFLAGS="$CFLAGS" 355 ax_pthread_save_CFLAGS="$CFLAGS" 356 ax_pthread_save_LIBS="$LIBS" 357 CFLAGS="$CFLAGS $PTHREAD_CFLAGS" 209 358 LIBS="$PTHREAD_LIBS $LIBS" 210 CFLAGS="$CFLAGS $PTHREAD_CFLAGS $ax_pthread_extra_flags"211 359 212 360 # Check for various functions. We must include pthread.h, … … 219 367 # functions on Solaris that doesn't have a non-functional libc stub. 220 368 # We try pthread_create on general principles. 369 221 370 AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h> 371 # if $ax_pthread_check_cond 372 # error "$ax_pthread_check_macro must be defined" 373 # endif 222 374 static void routine(void *a) { a = 0; } 223 375 static void *start_routine(void *a) { return a; }], … … 228 380 pthread_cleanup_push(routine, 0); 229 381 pthread_cleanup_pop(0) /* ; */])], 230 231 232 233 LIBS="$save_LIBS"234 CFLAGS="$save_CFLAGS"382 [ax_pthread_ok=yes], 383 []) 384 385 CFLAGS="$ax_pthread_save_CFLAGS" 386 LIBS="$ax_pthread_save_LIBS" 235 387 236 388 AC_MSG_RESULT([$ax_pthread_ok]) 237 if test "x$ax_pthread_ok" = xyes; then 238 break; 239 fi 389 AS_IF([test "x$ax_pthread_ok" = "xyes"], [break]) 240 390 241 391 PTHREAD_LIBS="" … … 245 395 246 396 # Various other checks: 247 if test "x$ax_pthread_ok" = xyes; then 248 save_LIBS="$LIBS" 397 if test "x$ax_pthread_ok" = "xyes"; then 398 ax_pthread_save_CFLAGS="$CFLAGS" 399 ax_pthread_save_LIBS="$LIBS" 400 CFLAGS="$CFLAGS $PTHREAD_CFLAGS" 249 401 LIBS="$PTHREAD_LIBS $LIBS" 250 save_CFLAGS="$CFLAGS"251 CFLAGS="$CFLAGS $PTHREAD_CFLAGS"252 402 253 403 # Detect AIX lossage: JOINABLE attribute is called UNDETACHED. 254 AC_ MSG_CHECKING([for joinable pthread attribute])255 attr_name=unknown256 for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do257 AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],258 [int attr = $attr; return attr /* ; */])],259 [attr_name=$attr; break],260 [])261 done262 AC_MSG_RESULT([$attr_name])263 if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then264 AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE], [$attr_name],265 [Define to necessary symbol if this constant266 uses a non-standard name on your system.])267 fi268 269 AC_MSG_CHECKING([if more special flags are required for pthreads])270 flag=no271 case ${host_os} in272 aix* | freebsd* | darwin*) flag="-D_THREAD_SAFE";;273 osf* | hpux*) flag="-D_REENTRANT";; 274 solaris*)275 if test "$GCC" = "yes"; then276 flag="-D_REENTRANT"277 else278 # TODO: What about Clang on Solaris?279 flag="-mt -D_REENTRANT"280 fi281 ;;282 esac283 A C_MSG_RESULT([$flag])284 if test "x$flag" != xno; then285 PTHREAD_CFLAGS="$flag$PTHREAD_CFLAGS"286 fi404 AC_CACHE_CHECK([for joinable pthread attribute], 405 [ax_cv_PTHREAD_JOINABLE_ATTR], 406 [ax_cv_PTHREAD_JOINABLE_ATTR=unknown 407 for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do 408 AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>], 409 [int attr = $ax_pthread_attr; return attr /* ; */])], 410 [ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break], 411 []) 412 done 413 ]) 414 AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \ 415 test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \ 416 test "x$ax_pthread_joinable_attr_defined" != "xyes"], 417 [AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE], 418 [$ax_cv_PTHREAD_JOINABLE_ATTR], 419 [Define to necessary symbol if this constant 420 uses a non-standard name on your system.]) 421 ax_pthread_joinable_attr_defined=yes 422 ]) 423 424 AC_CACHE_CHECK([whether more special flags are required for pthreads], 425 [ax_cv_PTHREAD_SPECIAL_FLAGS], 426 [ax_cv_PTHREAD_SPECIAL_FLAGS=no 427 case $host_os in 428 solaris*) 429 ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS" 430 ;; 431 esac 432 ]) 433 AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \ 434 test "x$ax_pthread_special_flags_added" != "xyes"], 435 [PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS" 436 ax_pthread_special_flags_added=yes]) 287 437 288 438 AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT], 289 [ax_cv_PTHREAD_PRIO_INHERIT], [290 291 292 [ax_cv_PTHREAD_PRIO_INHERIT=yes],293 [ax_cv_PTHREAD_PRIO_INHERIT=no])439 [ax_cv_PTHREAD_PRIO_INHERIT], 440 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], 441 [[int i = PTHREAD_PRIO_INHERIT;]])], 442 [ax_cv_PTHREAD_PRIO_INHERIT=yes], 443 [ax_cv_PTHREAD_PRIO_INHERIT=no]) 294 444 ]) 295 AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes"], 296 [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])]) 297 298 LIBS="$save_LIBS" 299 CFLAGS="$save_CFLAGS" 445 AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \ 446 test "x$ax_pthread_prio_inherit_defined" != "xyes"], 447 [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.]) 448 ax_pthread_prio_inherit_defined=yes 449 ]) 450 451 CFLAGS="$ax_pthread_save_CFLAGS" 452 LIBS="$ax_pthread_save_LIBS" 300 453 301 454 # More AIX lossage: compile with *_r variant 302 if test "x$GCC" != xyes; then455 if test "x$GCC" != "xyes"; then 303 456 case $host_os in 304 457 aix*) 305 458 AS_CASE(["x/$CC"], 306 [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],307 [#handle absolute path differently from PATH based program lookup308 AS_CASE(["x$CC"],309 [x/*],310 [AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])],311 [AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])])459 [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6], 460 [#handle absolute path differently from PATH based program lookup 461 AS_CASE(["x$CC"], 462 [x/*], 463 [AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])], 464 [AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])]) 312 465 ;; 313 466 esac … … 322 475 323 476 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: 324 if test x"$ax_pthread_ok" = xyes; then477 if test "x$ax_pthread_ok" = "xyes"; then 325 478 ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1]) 326 479 :
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