path: root/scripts
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authorDaniel Tang <dt.tangr@gmail.com>2013-06-09 12:33:55 +1000
committerMichal Marek <mmarek@suse.cz>2013-07-03 14:30:40 +0200
commit04130cc973a96df33b1429024fd6dec59fa35a84 (patch)
treebf7d1df446dce7eba88285b6a918914a8ce0e65e /scripts
parentbd70134396622ea50b14e34dae0810879884d553 (diff)
Fix a build warning in scripts/mod/file2alias.c
On some systems, __used is already defined in sys/cdefs.h and causes a build warning: scripts/mod/file2alias.c:85:1: warning: "__used" redefined In file included from /usr/include/stdio.h:64, from scripts/mod/modpost.h:1, from scripts/mod/file2alias.c:13: /usr/include/sys/cdefs.h:146:1: warning: this is the location of the previous definition This adds an extra check before defining the __used macro to see if the macro was already defined elsewhere. Signed-off-by: Daniel Tang <dt.tangr@gmail.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
Diffstat (limited to 'scripts')
1 files changed, 6 insertions, 4 deletions
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 45f9a3377dcd..ab554564569a 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -79,10 +79,12 @@ struct devtable **__start___devtable, **__stop___devtable;
extern struct devtable *__start___devtable[], *__stop___devtable[];
#endif /* __MACH__ */
-#if __GNUC__ == 3 && __GNUC_MINOR__ < 3
-# define __used __attribute__((__unused__))
-# define __used __attribute__((__used__))
+#if !defined(__used)
+# if __GNUC__ == 3 && __GNUC_MINOR__ < 3
+# define __used __attribute__((__unused__))
+# else
+# define __used __attribute__((__used__))
+# endif
/* Define a variable f that holds the value of field f of struct devid