diff options
Diffstat (limited to 'm4/ax_pthread.m4')
-rw-r--r-- | m4/ax_pthread.m4 | 385 |
1 files changed, 269 insertions, 116 deletions
diff --git a/m4/ax_pthread.m4 b/m4/ax_pthread.m4 index d383ad5c..4c4051ea 100644 --- a/m4/ax_pthread.m4 +++ b/m4/ax_pthread.m4 | |||
@@ -19,10 +19,10 @@ | |||
19 | # is necessary on AIX to use the special cc_r compiler alias.) | 19 | # is necessary on AIX to use the special cc_r compiler alias.) |
20 | # | 20 | # |
21 | # NOTE: You are assumed to not only compile your program with these flags, | 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 should link with | 22 | # but also to link with them as well. For example, you might link with |
23 | # $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS | 23 | # $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS |
24 | # | 24 | # |
25 | # If you are only building threads programs, you may wish to use these | 25 | # If you are only building threaded programs, you may wish to use these |
26 | # variables in your default LIBS, CFLAGS, and CC: | 26 | # variables in your default LIBS, CFLAGS, and CC: |
27 | # | 27 | # |
28 | # LIBS="$PTHREAD_LIBS $LIBS" | 28 | # LIBS="$PTHREAD_LIBS $LIBS" |
@@ -30,8 +30,8 @@ | |||
30 | # CC="$PTHREAD_CC" | 30 | # CC="$PTHREAD_CC" |
31 | # | 31 | # |
32 | # In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant | 32 | # In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant |
33 | # has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to that name | 33 | # has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to |
34 | # (e.g. PTHREAD_CREATE_UNDETACHED on AIX). | 34 | # that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX). |
35 | # | 35 | # |
36 | # Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the | 36 | # Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the |
37 | # PTHREAD_PRIO_INHERIT symbol is defined when compiling with | 37 | # PTHREAD_PRIO_INHERIT symbol is defined when compiling with |
@@ -82,35 +82,40 @@ | |||
82 | # modified version of the Autoconf Macro, you may extend this special | 82 | # modified version of the Autoconf Macro, you may extend this special |
83 | # exception to the GPL to apply to your modified version as well. | 83 | # exception to the GPL to apply to your modified version as well. |
84 | 84 | ||
85 | #serial 21 | 85 | #serial 23 |
86 | 86 | ||
87 | AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD]) | 87 | AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD]) |
88 | AC_DEFUN([AX_PTHREAD], [ | 88 | AC_DEFUN([AX_PTHREAD], [ |
89 | AC_REQUIRE([AC_CANONICAL_HOST]) | 89 | AC_REQUIRE([AC_CANONICAL_HOST]) |
90 | AC_REQUIRE([AC_PROG_CC]) | ||
91 | AC_REQUIRE([AC_PROG_SED]) | ||
90 | AC_LANG_PUSH([C]) | 92 | AC_LANG_PUSH([C]) |
91 | ax_pthread_ok=no | 93 | ax_pthread_ok=no |
92 | 94 | ||
93 | # We used to check for pthread.h first, but this fails if pthread.h | 95 | # We used to check for pthread.h first, but this fails if pthread.h |
94 | # requires special compiler flags (e.g. on True64 or Sequent). | 96 | # requires special compiler flags (e.g. on Tru64 or Sequent). |
95 | # It gets checked for in the link test anyway. | 97 | # It gets checked for in the link test anyway. |
96 | 98 | ||
97 | # First of all, check if the user has set any of the PTHREAD_LIBS, | 99 | # First of all, check if the user has set any of the PTHREAD_LIBS, |
98 | # etcetera environment variables, and if threads linking works using | 100 | # etcetera environment variables, and if threads linking works using |
99 | # them: | 101 | # them: |
100 | if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then | 102 | if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then |
101 | save_CFLAGS="$CFLAGS" | 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="$PTHREAD_CC"]) | ||
102 | CFLAGS="$CFLAGS $PTHREAD_CFLAGS" | 107 | CFLAGS="$CFLAGS $PTHREAD_CFLAGS" |
103 | save_LIBS="$LIBS" | ||
104 | LIBS="$PTHREAD_LIBS $LIBS" | 108 | LIBS="$PTHREAD_LIBS $LIBS" |
105 | AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS]) | 109 | AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS]) |
106 | AC_TRY_LINK_FUNC([pthread_join], [ax_pthread_ok=yes]) | 110 | AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes]) |
107 | AC_MSG_RESULT([$ax_pthread_ok]) | 111 | AC_MSG_RESULT([$ax_pthread_ok]) |
108 | if test x"$ax_pthread_ok" = xno; then | 112 | if test "x$ax_pthread_ok" = "xno"; then |
109 | PTHREAD_LIBS="" | 113 | PTHREAD_LIBS="" |
110 | PTHREAD_CFLAGS="" | 114 | PTHREAD_CFLAGS="" |
111 | fi | 115 | fi |
112 | LIBS="$save_LIBS" | 116 | CC="$ax_pthread_save_CC" |
113 | CFLAGS="$save_CFLAGS" | 117 | CFLAGS="$ax_pthread_save_CFLAGS" |
118 | LIBS="$ax_pthread_save_LIBS" | ||
114 | fi | 119 | fi |
115 | 120 | ||
116 | # We must check for the threads library under a number of different | 121 | # We must check for the threads library under a number of different |
@@ -123,7 +128,7 @@ fi | |||
123 | # which indicates that we try without any flags at all, and "pthread-config" | 128 | # which indicates that we try without any flags at all, and "pthread-config" |
124 | # which is a program returning the flags for the Pth emulation library. | 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 | # The ordering *is* (sometimes) important. Some notes on the | 133 | # The ordering *is* (sometimes) important. Some notes on the |
129 | # individual items follow: | 134 | # individual items follow: |
@@ -132,82 +137,225 @@ ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mt | |||
132 | # none: in case threads are in libc; should be tried before -Kthread and | 137 | # none: in case threads are in libc; should be tried before -Kthread and |
133 | # other compiler flags to prevent continual compiler warnings | 138 | # other compiler flags to prevent continual compiler warnings |
134 | # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h) | 139 | # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h) |
135 | # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) | 140 | # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64 |
136 | # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) | 141 | # (Note: HP C rejects this with "bad form for `-t' option") |
137 | # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads) | 142 | # -pthreads: Solaris/gcc (Note: HP C also rejects) |
138 | # -pthreads: Solaris/gcc | ||
139 | # -mthreads: Mingw32/gcc, Lynx/gcc | ||
140 | # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it | 143 | # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it |
141 | # doesn't hurt to check since this sometimes defines pthreads too; | 144 | # doesn't hurt to check since this sometimes defines pthreads and |
142 | # also defines -D_REENTRANT) | 145 | # -D_REENTRANT too), HP C (must be checked before -lpthread, which |
143 | # ... -mt is also the pthreads flag for HP/aCC | 146 | # is present but should not be used directly; and before -mthreads, |
147 | # because the compiler interprets this as "-mt" + "-hreads") | ||
148 | # -mthreads: Mingw32/gcc, Lynx/gcc | ||
144 | # pthread: Linux, etcetera | 149 | # pthread: Linux, etcetera |
145 | # --thread-safe: KAI C++ | 150 | # --thread-safe: KAI C++ |
146 | # pthread-config: use pthread-config program (for GNU Pth library) | 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 | solaris*) | 187 | solaris*) |
150 | 188 | ||
151 | # On Solaris (at least, for some versions), libc contains stubbed | 189 | # On Solaris (at least, for some versions), libc contains stubbed |
152 | # (non-functional) versions of the pthreads routines, so link-based | 190 | # (non-functional) versions of the pthreads routines, so link-based |
153 | # tests will erroneously succeed. (We need to link with -pthreads/-mt/ | 191 | # tests will erroneously succeed. (N.B.: The stubs are missing |
154 | # -lpthread.) (The stubs are missing pthread_cleanup_push, or rather | 192 | # pthread_cleanup_push, or rather a function called by this macro, |
155 | # a function called by this macro, so we could check for that, but | 193 | # so we could check for that, but who knows whether they'll stub |
156 | # who knows whether they'll stub that too in a future libc.) So, | 194 | # that too in a future libc.) So we'll check first for the |
157 | # we'll just look for -pthreads and -lpthread first: | 195 | # standard Solaris way of linking pthreads (-mt -lpthread). |
196 | |||
197 | ax_pthread_flags="-mt,pthread pthread $ax_pthread_flags" | ||
198 | ;; | ||
199 | esac | ||
200 | |||
201 | # GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC) | ||
158 | 202 | ||
159 | ax_pthread_flags="-pthreads pthread -mt -pthread $ax_pthread_flags" | 203 | AS_IF([test "x$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" | ||
160 | ;; | 213 | ;; |
161 | 214 | ||
162 | darwin*) | 215 | aix*) |
163 | ax_pthread_flags="-pthread $ax_pthread_flags" | 216 | ax_pthread_check_macro="_THREAD_SAFE" |
217 | ;; | ||
218 | |||
219 | *) | ||
220 | ax_pthread_check_macro="--" | ||
164 | ;; | 221 | ;; |
165 | esac | 222 | esac |
223 | AS_IF([test "x$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="$ax_pthread_try" | ||
314 | ]) | ||
166 | 315 | ||
167 | # Clang doesn't consider unrecognized options an error unless we specify | 316 | case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in |
168 | # -Werror. We throw in some extra Clang-specific options to ensure that | 317 | no | unknown) ;; |
169 | # this doesn't happen for GCC, which also accepts -Werror. | 318 | *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;; |
319 | esac | ||
170 | 320 | ||
171 | AC_MSG_CHECKING([if compiler needs -Werror to reject unknown flags]) | 321 | fi # $ax_pthread_clang = yes |
172 | save_CFLAGS="$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 | 322 | ||
181 | if test x"$ax_pthread_ok" = xno; then | 323 | if test "x$ax_pthread_ok" = "xno"; then |
182 | for flag in $ax_pthread_flags; do | 324 | for ax_pthread_try_flag in $ax_pthread_flags; do |
183 | 325 | ||
184 | case $flag in | 326 | case $ax_pthread_try_flag in |
185 | none) | 327 | none) |
186 | AC_MSG_CHECKING([whether pthreads work without any flags]) | 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]) | 338 | AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag]) |
191 | PTHREAD_CFLAGS="$flag" | 339 | PTHREAD_CFLAGS="$ax_pthread_try_flag" |
192 | ;; | 340 | ;; |
193 | 341 | ||
194 | pthread-config) | 342 | pthread-config) |
195 | AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no]) | 343 | AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no]) |
196 | if test x"$ax_pthread_config" = xno; then continue; fi | 344 | AS_IF([test "x$ax_pthread_config" = "xno"], [continue]) |
197 | PTHREAD_CFLAGS="`pthread-config --cflags`" | 345 | PTHREAD_CFLAGS="`pthread-config --cflags`" |
198 | PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" | 346 | PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" |
199 | ;; | 347 | ;; |
200 | 348 | ||
201 | *) | 349 | *) |
202 | AC_MSG_CHECKING([for the pthreads library -l$flag]) | 350 | AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag]) |
203 | PTHREAD_LIBS="-l$flag" | 351 | PTHREAD_LIBS="-l$ax_pthread_try_flag" |
204 | ;; | 352 | ;; |
205 | esac | 353 | esac |
206 | 354 | ||
207 | save_LIBS="$LIBS" | 355 | ax_pthread_save_CFLAGS="$CFLAGS" |
208 | save_CFLAGS="$CFLAGS" | 356 | ax_pthread_save_LIBS="$LIBS" |
357 | CFLAGS="$CFLAGS $PTHREAD_CFLAGS" | ||
209 | LIBS="$PTHREAD_LIBS $LIBS" | 358 | LIBS="$PTHREAD_LIBS $LIBS" |
210 | CFLAGS="$CFLAGS $PTHREAD_CFLAGS $ax_pthread_extra_flags" | ||
211 | 359 | ||
212 | # Check for various functions. We must include pthread.h, | 360 | # Check for various functions. We must include pthread.h, |
213 | # since some functions may be macros. (On the Sequent, we | 361 | # since some functions may be macros. (On the Sequent, we |
@@ -218,7 +366,11 @@ for flag in $ax_pthread_flags; do | |||
218 | # pthread_cleanup_push because it is one of the few pthread | 366 | # pthread_cleanup_push because it is one of the few pthread |
219 | # functions on Solaris that doesn't have a non-functional libc stub. | 367 | # functions on Solaris that doesn't have a non-functional libc stub. |
220 | # We try pthread_create on general principles. | 368 | # We try pthread_create on general principles. |
369 | |||
221 | AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h> | 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 | static void routine(void *a) { a = 0; } | 374 | static void routine(void *a) { a = 0; } |
223 | static void *start_routine(void *a) { return a; }], | 375 | static void *start_routine(void *a) { return a; }], |
224 | [pthread_t th; pthread_attr_t attr; | 376 | [pthread_t th; pthread_attr_t attr; |
@@ -227,16 +379,14 @@ for flag in $ax_pthread_flags; do | |||
227 | pthread_attr_init(&attr); | 379 | pthread_attr_init(&attr); |
228 | pthread_cleanup_push(routine, 0); | 380 | pthread_cleanup_push(routine, 0); |
229 | pthread_cleanup_pop(0) /* ; */])], | 381 | pthread_cleanup_pop(0) /* ; */])], |
230 | [ax_pthread_ok=yes], | 382 | [ax_pthread_ok=yes], |
231 | []) | 383 | []) |
232 | 384 | ||
233 | LIBS="$save_LIBS" | 385 | CFLAGS="$ax_pthread_save_CFLAGS" |
234 | CFLAGS="$save_CFLAGS" | 386 | LIBS="$ax_pthread_save_LIBS" |
235 | 387 | ||
236 | AC_MSG_RESULT([$ax_pthread_ok]) | 388 | AC_MSG_RESULT([$ax_pthread_ok]) |
237 | if test "x$ax_pthread_ok" = xyes; then | 389 | AS_IF([test "x$ax_pthread_ok" = "xyes"], [break]) |
238 | break; | ||
239 | fi | ||
240 | 390 | ||
241 | PTHREAD_LIBS="" | 391 | PTHREAD_LIBS="" |
242 | PTHREAD_CFLAGS="" | 392 | PTHREAD_CFLAGS="" |
@@ -244,71 +394,74 @@ done | |||
244 | fi | 394 | fi |
245 | 395 | ||
246 | # Various other checks: | 396 | # Various other checks: |
247 | if test "x$ax_pthread_ok" = xyes; then | 397 | if test "x$ax_pthread_ok" = "xyes"; then |
248 | save_LIBS="$LIBS" | 398 | ax_pthread_save_CFLAGS="$CFLAGS" |
249 | LIBS="$PTHREAD_LIBS $LIBS" | 399 | ax_pthread_save_LIBS="$LIBS" |
250 | save_CFLAGS="$CFLAGS" | ||
251 | CFLAGS="$CFLAGS $PTHREAD_CFLAGS" | 400 | CFLAGS="$CFLAGS $PTHREAD_CFLAGS" |
401 | LIBS="$PTHREAD_LIBS $LIBS" | ||
252 | 402 | ||
253 | # Detect AIX lossage: JOINABLE attribute is called UNDETACHED. | 403 | # Detect AIX lossage: JOINABLE attribute is called UNDETACHED. |
254 | AC_MSG_CHECKING([for joinable pthread attribute]) | 404 | AC_CACHE_CHECK([for joinable pthread attribute], |
255 | attr_name=unknown | 405 | [ax_cv_PTHREAD_JOINABLE_ATTR], |
256 | for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do | 406 | [ax_cv_PTHREAD_JOINABLE_ATTR=unknown |
257 | AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>], | 407 | for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do |
258 | [int attr = $attr; return attr /* ; */])], | 408 | AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>], |
259 | [attr_name=$attr; break], | 409 | [int attr = $ax_pthread_attr; return attr /* ; */])], |
260 | []) | 410 | [ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break], |
261 | done | 411 | []) |
262 | AC_MSG_RESULT([$attr_name]) | 412 | done |
263 | if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then | 413 | ]) |
264 | AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE], [$attr_name], | 414 | AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \ |
265 | [Define to necessary symbol if this constant | 415 | test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \ |
266 | uses a non-standard name on your system.]) | 416 | test "x$ax_pthread_joinable_attr_defined" != "xyes"], |
267 | fi | 417 | [AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE], |
268 | 418 | [$ax_cv_PTHREAD_JOINABLE_ATTR], | |
269 | AC_MSG_CHECKING([if more special flags are required for pthreads]) | 419 | [Define to necessary symbol if this constant |
270 | flag=no | 420 | uses a non-standard name on your system.]) |
271 | case ${host_os} in | 421 | ax_pthread_joinable_attr_defined=yes |
272 | aix* | freebsd* | darwin*) flag="-D_THREAD_SAFE";; | 422 | ]) |
273 | osf* | hpux*) flag="-D_REENTRANT";; | 423 | |
274 | solaris*) | 424 | AC_CACHE_CHECK([whether more special flags are required for pthreads], |
275 | if test "$GCC" = "yes"; then | 425 | [ax_cv_PTHREAD_SPECIAL_FLAGS], |
276 | flag="-D_REENTRANT" | 426 | [ax_cv_PTHREAD_SPECIAL_FLAGS=no |
277 | else | 427 | case $host_os in |
278 | # TODO: What about Clang on Solaris? | 428 | solaris*) |
279 | flag="-mt -D_REENTRANT" | 429 | ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS" |
280 | fi | 430 | ;; |
281 | ;; | 431 | esac |
282 | esac | 432 | ]) |
283 | AC_MSG_RESULT([$flag]) | 433 | AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \ |
284 | if test "x$flag" != xno; then | 434 | test "x$ax_pthread_special_flags_added" != "xyes"], |
285 | PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS" | 435 | [PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS" |
286 | fi | 436 | ax_pthread_special_flags_added=yes]) |
287 | 437 | ||
288 | AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT], | 438 | AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT], |
289 | [ax_cv_PTHREAD_PRIO_INHERIT], [ | 439 | [ax_cv_PTHREAD_PRIO_INHERIT], |
290 | AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], | 440 | [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], |
291 | [[int i = PTHREAD_PRIO_INHERIT;]])], | 441 | [[int i = PTHREAD_PRIO_INHERIT;]])], |
292 | [ax_cv_PTHREAD_PRIO_INHERIT=yes], | 442 | [ax_cv_PTHREAD_PRIO_INHERIT=yes], |
293 | [ax_cv_PTHREAD_PRIO_INHERIT=no]) | 443 | [ax_cv_PTHREAD_PRIO_INHERIT=no]) |
294 | ]) | 444 | ]) |
295 | AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes"], | 445 | AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \ |
296 | [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])]) | 446 | test "x$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 | ]) | ||
297 | 450 | ||
298 | LIBS="$save_LIBS" | 451 | CFLAGS="$ax_pthread_save_CFLAGS" |
299 | CFLAGS="$save_CFLAGS" | 452 | LIBS="$ax_pthread_save_LIBS" |
300 | 453 | ||
301 | # More AIX lossage: compile with *_r variant | 454 | # More AIX lossage: compile with *_r variant |
302 | if test "x$GCC" != xyes; then | 455 | if test "x$GCC" != "xyes"; then |
303 | case $host_os in | 456 | case $host_os in |
304 | aix*) | 457 | aix*) |
305 | AS_CASE(["x/$CC"], | 458 | AS_CASE(["x/$CC"], |
306 | [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6], | 459 | [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6], |
307 | [#handle absolute path differently from PATH based program lookup | 460 | [#handle absolute path differently from PATH based program lookup |
308 | AS_CASE(["x$CC"], | 461 | AS_CASE(["x$CC"], |
309 | [x/*], | 462 | [x/*], |
310 | [AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])], | 463 | [AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])], |
311 | [AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])]) | 464 | [AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])]) |
312 | ;; | 465 | ;; |
313 | esac | 466 | esac |
314 | fi | 467 | fi |
@@ -321,7 +474,7 @@ AC_SUBST([PTHREAD_CFLAGS]) | |||
321 | AC_SUBST([PTHREAD_CC]) | 474 | AC_SUBST([PTHREAD_CC]) |
322 | 475 | ||
323 | # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: | 476 | # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: |
324 | if test x"$ax_pthread_ok" = xyes; then | 477 | if test "x$ax_pthread_ok" = "xyes"; then |
325 | ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1]) | 478 | ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1]) |
326 | : | 479 | : |
327 | else | 480 | else |