Module Name: src
Committed By: joerg
Date: Wed Dec 8 01:18:55 UTC 2010
Modified Files:
src/sys/sys: cdefs_elf.h
Log Message:
Implement __warn_references and __SECTIONSTRING (used e.g. by __RCSID)
for clang without assembler. This declares a global variable with
attribute used to prevent optimisation, attribute section to change
the placement and includes __COUNTER__ in the variable name for
uniqueness.
To generate a diff of this commit:
cvs rdiff -u -r1.33 -r1.34 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:1.33 src/sys/sys/cdefs_elf.h:1.34
--- src/sys/sys/cdefs_elf.h:1.33 Tue Oct 12 06:39:48 2010
+++ src/sys/sys/cdefs_elf.h Wed Dec 8 01:18:55 2010
@@ -1,4 +1,4 @@
-/* $NetBSD: cdefs_elf.h,v 1.33 2010/10/12 06:39:48 skrll Exp $ */
+/* $NetBSD: cdefs_elf.h,v 1.34 2010/12/08 01:18:55 joerg Exp $ */
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
@@ -70,10 +70,16 @@
#define __weak_reference(sym) ; __asm(".weak " _C_LABEL_STRING(#sym))
#endif
+#if defined(__clang__)
+#define __warn_references(sym,msg) \
+ static __attribute__((__used__, __section__(".gnu.warning." #sym))) \
+ const char ___CONCAT(__warn_reference_##sym,__COUNTER__)[] = msg;
+#else
#define __warn_references(sym,msg) \
__asm(".pushsection .gnu.warning." #sym "\n" \
".ascii \"" msg "\"\n" \
".popsection");
+#endif
#else /* !__STDC__ */
@@ -100,7 +106,11 @@
#endif /* !__STDC__ */
-#if __STDC__
+#if defined(__clang__)
+#define __SECTIONSTRING(_sec, _str) \
+ static __attribute__((__used__, __section__(#_sec))) const char \
+ ___CONCAT(__sectstr,__COUNTER__)[] = _str
+#elif __STDC__
#define __SECTIONSTRING(_sec, _str) \
__asm(".pushsection " #_sec "\n" \
".asciz \"" _str "\"\n" \
