asctime: check for standards compliance (Solaris support)

Add checks to "configure" to see whether _POSIX_PTHREAD_SEMANTICS needs
to be defined to get the right number of arguments in the prototypes for
asctime_r().  Solaris' default implementation conforms to POSIX.1c
Draft 6, rather than the final POSIX.1c spec.  The standards-compliant
version can be used by defining _POSIX_PTHREAD_SEMANTICS.

This change also adds the file "compat/check_asctime.c", which
configure uses to perform its check, and modifies compat/compat.h to
define _POSIX_PTHREAD_SEMANTICS if configure detected it was needed.

Signed-off-by: Vladimir Marek <vlmarek@volny.cz>

1 files changed, 11 insertions, 0 deletions

diff --git a/compat/check_asctime.c b/compat/check_asctime.c
new file mode 100644
index 00000000..b0e56f0c
--- /dev/null
+++ b/compat/check_asctime.c
@@ -0,0 +1,11 @@
+#include <time.h>
+#include <stdio.h>
+
+int main()
+{
+    struct tm tm;
+
+    (void) asctime_r (&tm, NULL);
+
+    return (0);
+}