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| author | Daniel Tang <dt.tangr@gmail.com> | 2013-06-09 04:33:55 +0200 |
|---|---|---|
| committer | Michal Marek <mmarek@suse.cz> | 2013-07-03 14:30:40 +0200 |
| commit | 04130cc973a96df33b1429024fd6dec59fa35a84 (patch) | |
| tree | bf7d1df446dce7eba88285b6a918914a8ce0e65e | |
| parent | improve modalias building (diff) | |
| download | linux-04130cc973a96df33b1429024fd6dec59fa35a84.tar.xz linux-04130cc973a96df33b1429024fd6dec59fa35a84.zip | |
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>
| -rw-r--r-- | scripts/mod/file2alias.c | 10 |
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__)) -#else -# define __used __attribute__((__used__)) +#if !defined(__used) +# if __GNUC__ == 3 && __GNUC_MINOR__ < 3 +# define __used __attribute__((__unused__)) +# else +# define __used __attribute__((__used__)) +# endif #endif /* Define a variable f that holds the value of field f of struct devid |