From: Rich Felker <dalias@aerifal.cx>
Date: Tue, 7 Jun 2011 00:12:42 +0000 (-0400)
Subject: use __attribute__((const)) for errno and pthread_self if __GNUC__ is defined
X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=commitdiff_plain;h=cbf35978a9870fb1f5c73a852c986d4fcca6c2d4

use __attribute__((const)) for errno and pthread_self if __GNUC__ is defined

this is not too ugly and should result in significant code size and
performance improvements for many programs.
---

diff --git a/include/errno.h b/include/errno.h
index d9c2c9c7..9d680338 100644
--- a/include/errno.h
+++ b/include/errno.h
@@ -7,6 +7,9 @@ extern "C" {
 
 #include <bits/errno.h>
 
+#ifdef __GNUC__
+__attribute__((const))
+#endif
 extern int *__errno_location(void);
 #define errno (*__errno_location())
 
diff --git a/include/pthread.h b/include/pthread.h
index 5d97ebf6..a0af20fe 100644
--- a/include/pthread.h
+++ b/include/pthread.h
@@ -76,6 +76,9 @@ int pthread_detach(pthread_t);
 void pthread_exit(void *);
 int pthread_join(pthread_t, void **);
 
+#ifdef __GNUC__
+__attribute__((const))
+#endif
 pthread_t pthread_self(void);
 int pthread_equal(pthread_t, pthread_t);