headers: properly decorate attributes

Found by:
find -name '*.h' |xargs grep -i 'attribute.*(([a-z]'

For an example of the type of bugs this causes, try compiling this valid
C11 program (it's valid because 'noreturn' is reserved for use in the
user namespace unless you include <stdnoreturn.h>):

$ cat foo.c
#define noreturn __attribute__((noreturn))
#include <stdlib.h>
$ gcc -c -o foo.o -Wall foo.c
In file included from /usr/include/stdlib.h:11:0,
                 from foo.c:2:
foo.c:1:18: error: expected ')' before '__attribute__'
 #define noreturn __attribute__((noreturn))
                  ^
/usr/include/stdlib.h:66:28: error: expected ',' or ';' before ')' token
 _VOID _EXFUN(abort,(_VOID) _ATTRIBUTE ((noreturn)));
                            ^

* libc/machine/spu/spu_timer_internal.h: Decorate attribute names
with __, for namespace safety.
* libc/machine/xscale/machine/profile.h: Likewise.
* libc/include/stdlib.h: Likewise.
* libc/include/_ansi.h: Likewise.
* libc/include/sys/unistd.h: Likewise.
* libc/sys/linux/linuxthreads/libc-symbols.h: Likewise.
* libc/sys/linux/linuxthreads/internals.h: Likewise.
* libc/sys/linux/machine/i386/weakalias.h: Likewise.
* libc/sys/linux/machine/i386/dl-procinfo.h: Likewise.
* libc/sys/linux/machine/i386/dl-machine.h: Likewise.
* libc/sys/linux/libc-symbols.h: Likewise.
* libc/sys/linux/iconv/gconv_charset.h: Likewise.
* libc/sys/linux/include/resolv.h: Likewise.
* libc/sys/linux/sys/unistd.h: Likewise.
* libc/sys/linux/dl/atomicity.h: Likewise.
* libc/sys/linux/dl/dynamic-link.h: Likewise.
* libc/sys/linux/dl/ldsodefs.h: Likewise.

1 files changed, 8 insertions, 8 deletions

diff --git a/newlib/libc/sys/linux/linuxthreads/libc-symbols.h b/newlib/libc/sys/linux/linuxthreads/libc-symbols.h
index 97b672643..3f56cc259 100644
--- a/newlib/libc/sys/linux/linuxthreads/libc-symbols.h
+++ b/newlib/libc/sys/linux/linuxthreads/libc-symbols.h
@@ -91,12 +91,12 @@
 /* Define ALIASNAME as a strong alias for NAME.  */
 # define strong_alias(name, aliasname) _strong_alias(name, aliasname)
 # define _strong_alias(name, aliasname) \
-  extern __typeof (name) aliasname __attribute__ ((alias (#name)));
+  extern __typeof (name) aliasname __attribute__ ((__alias__ (#name)));
 
 /* This comes between the return type and function name in
    a function definition to make that definition weak.  */
-# define weak_function __attribute__ ((weak))
-# define weak_const_function __attribute__ ((weak, __const__))
+# define weak_function __attribute__ ((__weak__))
+# define weak_const_function __attribute__ ((__weak__, __const__))
 
 # ifdef HAVE_WEAK_SYMBOLS
 
@@ -104,7 +104,7 @@
    If weak aliases are not available, this defines a strong alias.  */
 #  define weak_alias(name, aliasname) _weak_alias (name, aliasname)
 #  define _weak_alias(name, aliasname) \
-  extern __typeof (name) aliasname __attribute__ ((weak, alias (#name)));
+  extern __typeof (name) aliasname __attribute__ ((__weak__, __alias__ (#name)));
 
 /* Declare SYMBOL as weak undefined symbol (resolved to 0 if not defined).  */
 #  define weak_extern(symbol) _weak_extern (symbol)
@@ -213,12 +213,12 @@
 #   define link_warning(symbol, msg) \
   __make_section_unallocated (".gnu.warning." #symbol) \
   static const char __evoke_link_warning_##symbol[]	\
-    __attribute__ ((section (".gnu.warning." #symbol "\"\n\t#\""))) = msg;
+    __attribute__ ((__section__ (".gnu.warning." #symbol "\"\n\t#\""))) = msg;
 #  else
 #   define link_warning(symbol, msg) \
   __make_section_unallocated (".gnu.warning." #symbol) \
   static const char __evoke_link_warning_##symbol[]	\
-    __attribute__ ((section (".gnu.warning." #symbol "\n\t#"))) = msg;
+    __attribute__ ((__section__ (".gnu.warning." #symbol "\n\t#"))) = msg;
 #  endif
 # else /* Not ELF: a.out */
 #  ifdef HAVE_XCOFF
@@ -267,11 +267,11 @@
    because it will need to be relocated at run time anyway.  */
 #   define _elf_set_element(set, symbol) \
   static const void *__elf_set_##set##_element_##symbol##__ \
-    __attribute__ ((unused, section (#set))) = &(symbol)
+    __attribute__ ((__unused__, __section__ (#set))) = &(symbol)
 #  else
 #   define _elf_set_element(set, symbol) \
   static const void *const __elf_set_##set##_element_##symbol##__ \
-    __attribute__ ((unused, section (#set))) = &(symbol)
+    __attribute__ ((__unused__, __section__ (#set))) = &(symbol)
 #  endif
 
 /* Define SET as a symbol set.  This may be required (it is in a.out) to