Changeset 3ca4d9c in git for m4/ax_pthread.m4
- Timestamp:
- Nov 14, 2022, 12:24:38 PM (18 months ago)
- Branches:
- (u'spielwiese', 'fe61d9c35bf7c61f2b6cbf1b56e25e2f08d536cc')
- Children:
- 660715de78e3fdf9dcc3f9388b1a1c61ec1c2ec5
- Parents:
- f0d4bd4caae9db63763bba2f6c56156355628e8b
- File:
-
- 1 edited
-
m4/ax_pthread.m4 (modified) (17 diffs)
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- Unmodified
- Added
- Removed
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m4/ax_pthread.m4
rf0d4bd4 r3ca4d9c 1 1 # =========================================================================== 2 # http s://www.gnu.org/software/autoconf-archive/ax_pthread.html2 # http://www.gnu.org/software/autoconf-archive/ax_pthread.html 3 3 # =========================================================================== 4 4 # … … 15 15 # flags/libs to be tested by setting these environment variables.) 16 16 # 17 # Also sets PTHREAD_CC and PTHREAD_CXX to any special C compiler that is 18 # needed for multi-threaded programs (defaults to the value of CC 19 # respectively CXX otherwise). (This is necessary on e.g. AIX to use the 20 # special cc_r/CC_r compiler alias.) 17 # Also sets PTHREAD_CC to any special C compiler that is needed for 18 # multi-threaded programs (defaults to the value of CC otherwise). (This 19 # is necessary on AIX to use the special cc_r compiler alias.) 21 20 # 22 21 # NOTE: You are assumed to not only compile your program with these flags, 23 22 # but also to link with them as well. For example, you might link with 24 23 # $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS 25 # $PTHREAD_CXX $CXXFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS26 24 # 27 25 # If you are only building threaded programs, you may wish to use these … … 30 28 # LIBS="$PTHREAD_LIBS $LIBS" 31 29 # CFLAGS="$CFLAGS $PTHREAD_CFLAGS" 32 # CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS"33 30 # CC="$PTHREAD_CC" 34 # CXX="$PTHREAD_CXX"35 31 # 36 32 # In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant … … 60 56 # Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu> 61 57 # Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG> 62 # Copyright (c) 2019 Marc Stevens <marc.stevens@cwi.nl>63 58 # 64 59 # This program is free software: you can redistribute it and/or modify it … … 73 68 # 74 69 # You should have received a copy of the GNU General Public License along 75 # with this program. If not, see <http s://www.gnu.org/licenses/>.70 # with this program. If not, see <http://www.gnu.org/licenses/>. 76 71 # 77 72 # As a special exception, the respective Autoconf Macro's copyright owner … … 88 83 # exception to the GPL to apply to your modified version as well. 89 84 90 #serial 3185 #serial 23 91 86 92 87 AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD]) … … 110 105 ax_pthread_save_LIBS="$LIBS" 111 106 AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"]) 112 AS_IF([test "x$PTHREAD_CXX" != "x"], [CXX="$PTHREAD_CXX"])113 107 CFLAGS="$CFLAGS $PTHREAD_CFLAGS" 114 108 LIBS="$PTHREAD_LIBS $LIBS" … … 130 124 # libraries is broken (non-POSIX). 131 125 132 # Create a list of thread flags to try. Items with a "," contain both 133 # C compiler flags (before ",") and linker flags (after ","). Other items 134 # starting with a "-" are C compiler flags, and remaining items are 135 # library names, except for "none" which indicates that we try without 136 # any flags at all, and "pthread-config" which is a program returning 137 # the flags for the Pth emulation library. 126 # Create a list of thread flags to try. Items starting with a "-" are 127 # C compiler flags, and other items are library names, except for "none" 128 # which indicates that we try without any flags at all, and "pthread-config" 129 # which is a program returning the flags for the Pth emulation library. 138 130 139 131 ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config" … … 203 195 # standard Solaris way of linking pthreads (-mt -lpthread). 204 196 205 ax_pthread_flags="-mt, -lpthread pthread $ax_pthread_flags"197 ax_pthread_flags="-mt,pthread pthread $ax_pthread_flags" 206 198 ;; 207 199 esac 200 201 # GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC) 202 203 AS_IF([test "x$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($ax_pthread_check_macro)"]) 208 226 209 227 # Are we compiling with Clang? … … 225 243 ax_pthread_clang="$ax_cv_PTHREAD_CLANG" 226 244 227 228 # GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC) 229 230 # Note that for GCC and Clang -pthread generally implies -lpthread, 231 # except when -nostdlib is passed. 232 # This is problematic using libtool to build C++ shared libraries with pthread: 233 # [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460 234 # [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333 235 # [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555 236 # To solve this, first try -pthread together with -lpthread for GCC 237 238 AS_IF([test "x$GCC" = "xyes"], 239 [ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"]) 240 241 # Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first 242 243 AS_IF([test "x$ax_pthread_clang" = "xyes"], 244 [ax_pthread_flags="-pthread,-lpthread -pthread"]) 245 246 247 # The presence of a feature test macro requesting re-entrant function 248 # definitions is, on some systems, a strong hint that pthreads support is 249 # correctly enabled 250 251 case $host_os in 252 darwin* | hpux* | linux* | osf* | solaris*) 253 ax_pthread_check_macro="_REENTRANT" 254 ;; 255 256 aix*) 257 ax_pthread_check_macro="_THREAD_SAFE" 258 ;; 259 260 *) 261 ax_pthread_check_macro="--" 262 ;; 263 esac 264 AS_IF([test "x$ax_pthread_check_macro" = "x--"], 265 [ax_pthread_check_cond=0], 266 [ax_pthread_check_cond="!defined($ax_pthread_check_macro)"]) 267 268 269 if test "x$ax_pthread_ok" = "xno"; then 270 for ax_pthread_try_flag in $ax_pthread_flags; do 271 272 case $ax_pthread_try_flag in 273 none) 274 AC_MSG_CHECKING([whether pthreads work without any flags]) 275 ;; 276 277 *,*) 278 PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"` 279 PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"` 280 AC_MSG_CHECKING([whether pthreads work with "$PTHREAD_CFLAGS" and "$PTHREAD_LIBS"]) 281 ;; 282 283 -*) 284 AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag]) 285 PTHREAD_CFLAGS="$ax_pthread_try_flag" 286 ;; 287 288 pthread-config) 289 AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no]) 290 AS_IF([test "x$ax_pthread_config" = "xno"], [continue]) 291 PTHREAD_CFLAGS="`pthread-config --cflags`" 292 PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" 293 ;; 294 295 *) 296 AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag]) 297 PTHREAD_LIBS="-l$ax_pthread_try_flag" 298 ;; 299 esac 300 301 ax_pthread_save_CFLAGS="$CFLAGS" 302 ax_pthread_save_LIBS="$LIBS" 303 CFLAGS="$CFLAGS $PTHREAD_CFLAGS" 304 LIBS="$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. 315 316 AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h> 317 # if $ax_pthread_check_cond 318 # error "$ax_pthread_check_macro must be defined" 319 # endif 320 static void *some_global = NULL; 321 static void routine(void *a) 322 { 323 /* To avoid any unused-parameter or 324 unused-but-set-parameter warning. */ 325 some_global = a; 326 } 327 static void *start_routine(void *a) { return a; }], 328 [pthread_t th; pthread_attr_t attr; 329 pthread_create(&th, 0, start_routine, 0); 330 pthread_join(th, 0); 331 pthread_attr_init(&attr); 332 pthread_cleanup_push(routine, 0); 333 pthread_cleanup_pop(0) /* ; */])], 334 [ax_pthread_ok=yes], 335 []) 336 337 CFLAGS="$ax_pthread_save_CFLAGS" 338 LIBS="$ax_pthread_save_LIBS" 339 340 AC_MSG_RESULT([$ax_pthread_ok]) 341 AS_IF([test "x$ax_pthread_ok" = "xyes"], [break]) 342 343 PTHREAD_LIBS="" 344 PTHREAD_CFLAGS="" 345 done 346 fi 347 245 ax_pthread_clang_warning=no 348 246 349 247 # Clang needs special handling, because older versions handle the -pthread … … 363 261 # -pthread does define _REENTRANT, and while the Darwin headers 364 262 # ignore this macro, third-party headers might not.) 263 264 PTHREAD_CFLAGS="-pthread" 265 PTHREAD_LIBS= 266 267 ax_pthread_ok=yes 365 268 366 269 # However, older versions of Clang make a point of warning the user … … 392 295 ax_pthread_save_ac_link="$ac_link" 393 296 ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g' 394 ax_pthread_link_step=` AS_ECHO(["$ac_link"])| sed "$ax_pthread_sed"`297 ax_pthread_link_step=`$as_echo "$ac_link" | sed "$ax_pthread_sed"` 395 298 ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)" 396 299 ax_pthread_save_CFLAGS="$CFLAGS" … … 418 321 fi # $ax_pthread_clang = yes 419 322 420 323 if test "x$ax_pthread_ok" = "xno"; then 324 for ax_pthread_try_flag in $ax_pthread_flags; do 325 326 case $ax_pthread_try_flag in 327 none) 328 AC_MSG_CHECKING([whether pthreads work without any flags]) 329 ;; 330 331 -mt,pthread) 332 AC_MSG_CHECKING([whether pthreads work with -mt -lpthread]) 333 PTHREAD_CFLAGS="-mt" 334 PTHREAD_LIBS="-lpthread" 335 ;; 336 337 -*) 338 AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag]) 339 PTHREAD_CFLAGS="$ax_pthread_try_flag" 340 ;; 341 342 pthread-config) 343 AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no]) 344 AS_IF([test "x$ax_pthread_config" = "xno"], [continue]) 345 PTHREAD_CFLAGS="`pthread-config --cflags`" 346 PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" 347 ;; 348 349 *) 350 AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag]) 351 PTHREAD_LIBS="-l$ax_pthread_try_flag" 352 ;; 353 esac 354 355 ax_pthread_save_CFLAGS="$CFLAGS" 356 ax_pthread_save_LIBS="$LIBS" 357 CFLAGS="$CFLAGS $PTHREAD_CFLAGS" 358 LIBS="$PTHREAD_LIBS $LIBS" 359 360 # Check for various functions. We must include pthread.h, 361 # since some functions may be macros. (On the Sequent, we 362 # need a special flag -Kthread to make this header compile.) 363 # We check for pthread_join because it is in -lpthread on IRIX 364 # while pthread_create is in libc. We check for pthread_attr_init 365 # due to DEC craziness with -lpthreads. We check for 366 # pthread_cleanup_push because it is one of the few pthread 367 # functions on Solaris that doesn't have a non-functional libc stub. 368 # We try pthread_create on general principles. 369 370 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 374 static void routine(void *a) { a = 0; } 375 static void *start_routine(void *a) { return a; }], 376 [pthread_t th; pthread_attr_t attr; 377 pthread_create(&th, 0, start_routine, 0); 378 pthread_join(th, 0); 379 pthread_attr_init(&attr); 380 pthread_cleanup_push(routine, 0); 381 pthread_cleanup_pop(0) /* ; */])], 382 [ax_pthread_ok=yes], 383 []) 384 385 CFLAGS="$ax_pthread_save_CFLAGS" 386 LIBS="$ax_pthread_save_LIBS" 387 388 AC_MSG_RESULT([$ax_pthread_ok]) 389 AS_IF([test "x$ax_pthread_ok" = "xyes"], [break]) 390 391 PTHREAD_LIBS="" 392 PTHREAD_CFLAGS="" 393 done 394 fi 421 395 422 396 # Various other checks: … … 465 439 [ax_cv_PTHREAD_PRIO_INHERIT], 466 440 [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], 467 [[int i = PTHREAD_PRIO_INHERIT; 468 return i;]])], 441 [[int i = PTHREAD_PRIO_INHERIT;]])], 469 442 [ax_cv_PTHREAD_PRIO_INHERIT=yes], 470 443 [ax_cv_PTHREAD_PRIO_INHERIT=no]) … … 488 461 AS_CASE(["x$CC"], 489 462 [x/*], 490 [ 491 AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"]) 492 AS_IF([test "x${CXX}" != "x"], [AS_IF([AS_EXECUTABLE_P([${CXX}_r])],[PTHREAD_CXX="${CXX}_r"])]) 493 ], 494 [ 495 AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC]) 496 AS_IF([test "x${CXX}" != "x"], [AC_CHECK_PROGS([PTHREAD_CXX],[${CXX}_r],[$CXX])]) 497 ] 498 ) 499 ]) 463 [AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])], 464 [AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])]) 500 465 ;; 501 466 esac … … 504 469 505 470 test -n "$PTHREAD_CC" || PTHREAD_CC="$CC" 506 test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"507 471 508 472 AC_SUBST([PTHREAD_LIBS]) 509 473 AC_SUBST([PTHREAD_CFLAGS]) 510 474 AC_SUBST([PTHREAD_CC]) 511 AC_SUBST([PTHREAD_CXX])512 475 513 476 # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: … … 521 484 AC_LANG_POP 522 485 ])dnl AX_PTHREAD 523
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