-# pthread.m4
-dnl Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+# pthread.m4 serial 7
+dnl Copyright (C) 2009-2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_PTHREAD_CHECK],
- [AC_CHECK_HEADERS_ONCE([pthread.h])
-
- LIB_PTHREAD=
- PTHREAD_H=
- if test "$ac_cv_header_pthread_h" = yes; then
- gl_saved_libs=$LIBS
- AC_SEARCH_LIBS([pthread_create], [pthread],
- [if test "$ac_cv_search_pthread_create" != "none required"; then
- LIB_PTHREAD="$ac_cv_search_pthread_create"
- fi])
- LIBS="$gl_saved_libs"
+[
+ AC_REQUIRE([gl_PTHREAD_DEFAULTS])
+ gl_CHECK_NEXT_HEADERS([pthread.h])
+ if test $ac_cv_header_pthread_h = yes; then
+ HAVE_PTHREAD_H=1
else
- AC_CHECK_TYPES([pthread_t])
+ HAVE_PTHREAD_H=0
+ fi
+
+ AC_CHECK_TYPES([pthread_t, pthread_spinlock_t], [], [],
+ [AC_INCLUDES_DEFAULT[
+ #if HAVE_PTHREAD_H
+ #include <pthread.h>
+ #endif]])
+ if test $ac_cv_type_pthread_t != yes; then
+ HAVE_PTHREAD_T=0
+ fi
+ if test $ac_cv_type_pthread_spinlock_t != yes; then
+ HAVE_PTHREAD_SPINLOCK_T=0
+ fi
+
+ if test $ac_cv_header_pthread_h != yes ||
+ test $ac_cv_type_pthread_t != yes ||
+ test $ac_cv_type_pthread_spinlock_t != yes; then
PTHREAD_H='pthread.h'
+ AC_LIBOBJ([pthread])
+ else
+ PTHREAD_H=
fi
+ AC_SUBST([PTHREAD_H])
+ AM_CONDITIONAL([GL_GENERATE_PTHREAD_H], [test -n "$PTHREAD_H"])
+ LIB_PTHREAD=
+ if test $ac_cv_header_pthread_h = yes; then
+ dnl We cannot use AC_SEARCH_LIBS here, because on OSF/1 5.1 pthread_join
+ dnl is defined as a macro which expands to __phread_join, and libpthread
+ dnl contains a definition for __phread_join but none for pthread_join.
+ dnl Also, FreeBSD 9 puts pthread_create in libpthread and pthread_join
+ dnl in libc, whereas on IRIX 6.5 the reverse is true; so check for both.
+ AC_CACHE_CHECK([for library containing pthread_create and pthread_join],
+ [gl_cv_lib_pthread],
+ [gl_saved_libs=$LIBS
+ gl_cv_lib_pthread=
+ for gl_lib_prefix in '' '-lpthread'; do
+ LIBS="$gl_lib_prefix $gl_saved_libs"
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <pthread.h>
+ void *noop (void *p) { return p; }]],
+ [[pthread_t pt;
+ void *arg = 0;
+ pthread_create (&pt, 0, noop, arg);
+ pthread_join (pthread_self (), &arg);]])],
+ [if test -z "$gl_lib_prefix"; then
+ gl_cv_lib_pthread="none required"
+ else
+ gl_cv_lib_pthread=$gl_lib_prefix
+ fi])
+ test -n "$gl_cv_lib_pthread" && break
+ done
+ LIBS="$gl_saved_libs"
+ ])
+ if test "$gl_cv_lib_pthread" != "none required"; then
+ LIB_PTHREAD="$gl_cv_lib_pthread"
+ fi
+ fi
AC_SUBST([LIB_PTHREAD])
- AC_SUBST([PTHREAD_H])
- AC_REQUIRE([AC_C_INLINE])
AC_REQUIRE([AC_C_RESTRICT])
])
+
+AC_DEFUN([gl_PTHREAD_DEFAULTS],
+[
+ dnl Assume proper GNU behavior unless another module says otherwise.
+ HAVE_PTHREAD_H=1; AC_SUBST([HAVE_PTHREAD_H])
+ HAVE_PTHREAD_T=1; AC_SUBST([HAVE_PTHREAD_T])
+ HAVE_PTHREAD_SPINLOCK_T=1; AC_SUBST([HAVE_PTHREAD_SPINLOCK_T])
+])