build: restore BSD thread names after 9f461b85bf

On FreeBSD non-POSIX threading functions are in a separate header.
DragonFly and OpenBSD adopted FreeBSD header and extensions.

../test.c:3:3: error: implicit declaration of function 'pthread_set_name_np' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
{ pthread_set_name_np(pthread_self(), "ducks"); return 0; }
  ^
../osdep/threads.c:47:5: error: implicit declaration of function 'pthread_set_name_np' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    pthread_set_name_np(pthread_self(), tname);
    ^

Signed-off-by: Jan Beich <[email protected]>

osdep/threads.c

@@ -24,6 +24,10 @@
 #include "threads.h"
 #include "timer.h"
 
+#if HAVE_BSD_THREAD_NAME
+#include <pthread_np.h>
+#endif
+
 int mpthread_mutex_init_recursive(pthread_mutex_t *mutex)
 {
     pthread_mutexattr_t attr;

wscript

@@ -308,7 +308,7 @@ iconv support use --disable-iconv.",
         'name': 'bsd-thread-name',
         'desc': 'BSD API for setting thread name',
         'deps': '!(glibc-thread-name || osx-thread-name)',
-        'func': check_statement('pthread.h',
+        'func': check_statement(['pthread.h', 'pthread_np.h'],
                                 'pthread_set_name_np(pthread_self(), "ducks")',
                                 use=['pthreads']),
     }, {