some feature test fixes for unistd.h

[musl] / src / internal / libc.h

diff --git a/src/internal/libc.h b/src/internal/libc.h
index d985902..78fca47 100644 (file)
--- a/src/internal/libc.h
+++ b/src/internal/libc.h
@@ -15,20 +15,28 @@ struct __libc {
        volatile int threads_minus_1;
        int canceldisable;
        FILE *ofl_head;
-       int ofl_lock;
+       int ofl_lock[2];
 };
 
 
-#if 100*__GNUC__+__GNUC_MINOR__ >= 303 || defined(__PCC__) || defined(__TINYC__)
-extern struct __libc __libc __attribute__((visibility("hidden")));
-#define libc __libc
+#if !defined(__PIC__) || 100*__GNUC__+__GNUC_MINOR__ >= 303 || defined(__PCC__) || defined(__TINYC__)
+
+#ifdef __PIC__
+#if __GNUC__ < 4
+#define BROKEN_VISIBILITY 1
+#endif
+#define ATTR_LIBC_VISIBILITY __attribute__((visibility("hidden"))) 
+#else
+#define ATTR_LIBC_VISIBILITY
+#endif
 
-#elif !defined(__PIC__)
-extern struct __libc __libc;
+extern struct __libc __libc ATTR_LIBC_VISIBILITY;
 #define libc __libc
 
 #else
+
 #define USE_LIBC_ACCESSOR
+#define ATTR_LIBC_VISIBILITY
 extern struct __libc *__libc_loc(void) __attribute__((const));
 #define libc (*__libc_loc())
 
@@ -37,10 +45,11 @@ extern struct __libc *__libc_loc(void) __attribute__((const));
 
 /* Designed to avoid any overhead in non-threaded processes */
 void __lock(volatile int *);
+void __unlock(volatile int *);
 int __lockfile(FILE *);
 void __unlockfile(FILE *);
 #define LOCK(x) (libc.threads_minus_1 ? (__lock(x),1) : ((void)(x),1))
-#define UNLOCK(x) (*(volatile int *)(x)=0)
+#define UNLOCK(x) (libc.threads_minus_1 ? (__unlock(x),1) : ((void)(x),1))
 
 void __synccall(void (*)(void *), void *);
 void __synccall_wait(void);