use weak symbols for the POSIX functions that will be used by C threads

The intent of this is to avoid name space pollution of the C threads
implementation.

This has two sides to it. First we have to provide symbols that wouldn't
pollute the name space for the C threads implementation. Second we have
to clean up some internal uses of POSIX functions such that they don't
implicitly drag in such symbols.

1 files changed, 6 insertions, 2 deletions

diff --git a/src/thread/pthread_join.c b/src/thread/pthread_join.c
index abd2d668..19e6b548 100644
--- a/src/thread/pthread_join.c
+++ b/src/thread/pthread_join.c
@@ -1,16 +1,20 @@
 #include "pthread_impl.h"
 #include <sys/mman.h>
 
+int __munmap(void *, size_t);
+
 static void dummy(void *p)
 {
 }
 
-int pthread_join(pthread_t t, void **res)
+int __pthread_join(pthread_t t, void **res)
 {
 	int tmp;
 	pthread_testcancel();
 	while ((tmp = t->tid)) __timedwait(&t->tid, tmp, 0, 0, dummy, 0, 0);
 	if (res) *res = t->result;
-	if (t->map_base) munmap(t->map_base, t->map_size);
+	if (t->map_base) __munmap(t->map_base, t->map_size);
 	return 0;
 }
+
+weak_alias(__pthread_join, pthread_join);