Module Name: src
Committed By: joerg
Date: Mon Dec 8 20:50:11 UTC 2014
Modified Files:
src/sys/sys: cdefs_elf.h
Log Message:
Add macro to mark a symbol as weak. Use it to mark the end of a linker
set as empty linker set otherwise violate the aliasing rules of C by
presenting zero sized objects.
To generate a diff of this commit:
cvs rdiff -u -r1.46 -r1.47 src/sys/sys/cdefs_elf.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/sys/cdefs_elf.h
diff -u src/sys/sys/cdefs_elf.h:1.46 src/sys/sys/cdefs_elf.h:1.47
--- src/sys/sys/cdefs_elf.h:1.46 Tue Aug 26 09:03:17 2014
+++ src/sys/sys/cdefs_elf.h Mon Dec 8 20:50:11 2014
@@ -1,4 +1,4 @@
-/* $NetBSD: cdefs_elf.h,v 1.46 2014/08/26 09:03:17 christos Exp $ */
+/* $NetBSD: cdefs_elf.h,v 1.47 2014/12/08 20:50:11 joerg Exp $ */
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
@@ -65,6 +65,12 @@
__asm(".weak " _C_LABEL_STRING(#sym));
#if __GNUC_PREREQ__(4, 0)
+#define __weak __attribute__((__weak__))
+#else
+#define __weak
+#endif
+
+#if __GNUC_PREREQ__(4, 0)
#define __weak_reference(sym) __attribute__((__weakref__(#sym)))
#else
#define __weak_reference(sym) ; __asm(".weak " _C_LABEL_STRING(#sym))
@@ -169,7 +175,7 @@
#define __link_set_decl(set, ptype) \
extern ptype * const __link_set_start(set)[] __dso_hidden; \
- extern ptype * const __link_set_end(set)[] __dso_hidden
+ extern ptype * const __link_set_end(set)[] __weak __dso_hidden
#define __link_set_count(set) \
(__link_set_end(set) - __link_set_start(set))
