+AC_DEFUN([OL_PTHREAD_TEST_INCLUDES],
+[/* pthread test headers */
+#include <pthread.h>
+#if HAVE_PTHREADS < 7
+#include <errno.h>
+#endif
+#ifndef NULL
+#define NULL (void*)0
+#endif
+
+static void *task(p)
+ void *p;
+{
+ return (void *) (p == NULL);
+}
+])
+AC_DEFUN([OL_PTHREAD_TEST_FUNCTION],[
+ /* pthread test function */
+#ifndef PTHREAD_CREATE_DETACHED
+#define PTHREAD_CREATE_DETACHED 1
+#endif
+ pthread_t t;
+ int status;
+ int detach = PTHREAD_CREATE_DETACHED;
+
+#if HAVE_PTHREADS > 4
+ /* Final pthreads */
+ pthread_attr_t attr;
+
+ status = pthread_attr_init(&attr);
+ if( status ) return status;
+
+#if HAVE_PTHREADS < 7
+ status = pthread_attr_setdetachstate(&attr, &detach);
+ if( status < 0 ) status = errno;
+#else
+ status = pthread_attr_setdetachstate(&attr, detach);
+#endif
+ if( status ) return status;
+ status = pthread_create( &t, &attr, task, NULL );
+#if HAVE_PTHREADS < 7
+ if( status < 0 ) status = errno;
+#endif
+ if( status ) return status;
+#else
+ /* Draft 4 pthreads */
+ status = pthread_create( &t, pthread_attr_default, task, NULL );
+ if( status ) return errno;
+
+ /* give thread a chance to complete */
+ /* it should remain joinable and hence detachable */
+ sleep( 1 );
+
+ status = pthread_detach( &t );
+ if( status ) return errno;
+#endif
+
+#ifdef HAVE_LINUX_THREADS
+ pthread_kill_other_threads_np();
+#endif
+
+ return 0;
+])
+
+AC_DEFUN([OL_PTHREAD_TEST_PROGRAM],
+[OL_PTHREAD_TEST_INCLUDES
+
+int main(argc, argv)
+ int argc;
+ char **argv;
+{
+OL_PTHREAD_TEST_FUNCTION
+}
+])
+dnl --------------------------------------------------------------------
+AC_DEFUN([OL_PTHREAD_TRY], [# Pthread try link: $1 ($2)
+if test "$ol_link_threads" = no ; then
+ # try $1
+ AC_CACHE_CHECK([for pthread link with $1], [$2], [
+ # save the flags
+ ol_LIBS="$LIBS"
+ LIBS="$1 $LIBS"
+
+ AC_TRY_RUN(OL_PTHREAD_TEST_PROGRAM,
+ [$2=yes], [$2=no],
+ [AC_TRY_LINK(OL_PTHREAD_TEST_INCLUDES,OL_PTHREAD_TEST_FUNCTION,
+ [$2=yes], [$2=no])])
+
+ # restore the LIBS
+ LIBS="$ol_LIBS"
+ ])
+
+ if test $$2 = yes ; then
+ ol_link_pthreads="$1"
+ ol_link_threads=posix
+ fi
+fi
+])
+dnl
+dnl ====================================================================
+dnl Check GNU Pth pthread Header