Merge from gnulib.

2013-05-15 manywarnings: update for GCC 4.8.0
2013-05-15 stdio: use __REDIRECT for fwrite, fwrite_unlocked
2013-05-15 sig2str, stdio, warnings: port to clang

2 files changed, 20 insertions, 6 deletions

diff --git a/lib/sig2str.c b/lib/sig2str.c
index 8b36e2facf0..6ead2a71d13 100644
--- a/lib/sig2str.c
+++ b/lib/sig2str.c
@@ -325,21 +325,25 @@ sig2str (int signum, char *signame)
   {
     int rtmin = SIGRTMIN;
     int rtmax = SIGRTMAX;
+    int base, delta;
 
     if (! (rtmin <= signum && signum <= rtmax))
       return -1;
 
     if (signum <= rtmin + (rtmax - rtmin) / 2)
       {
-        int delta = signum - rtmin;
-        sprintf (signame, delta ? "RTMIN+%d" : "RTMIN", delta);
+        strcpy (signame, "RTMIN");
+        base = rtmin;
       }
     else
       {
-        int delta = rtmax - signum;
-        sprintf (signame, delta ? "RTMAX-%d" : "RTMAX", delta);
+        strcpy (signame, "RTMAX");
+        base = rtmax;
       }
 
+    delta = signum - base;
+    if (delta != 0)
+      sprintf (signame + 5, "%+d", delta);
     return 0;
   }
 }
diff --git a/lib/stdio.in.h b/lib/stdio.in.h
index d6af99ca77d..06cbad00d3d 100644
--- a/lib/stdio.in.h
+++ b/lib/stdio.in.h
@@ -579,13 +579,23 @@ _GL_CXXALIAS_SYS (fwrite, size_t,
    <http://sources.redhat.com/bugzilla/show_bug.cgi?id=11959>,
    which sometimes causes an unwanted diagnostic for fwrite calls.
    This affects only function declaration attributes under certain
-   versions of gcc, and is not needed for C++.  */
+   versions of gcc and clang, and is not needed for C++.  */
 #  if (0 < __USE_FORTIFY_LEVEL                                          \
        && __GLIBC__ == 2 && 4 <= __GLIBC_MINOR__ && __GLIBC_MINOR__ <= 15 \
        && 3 < __GNUC__ + (4 <= __GNUC_MINOR__)                          \
        && !defined __cplusplus)
 #   undef fwrite
-#   define fwrite(a, b, c, d) ({size_t __r = fwrite (a, b, c, d); __r; })
+#   undef fwrite_unlocked
+extern size_t __REDIRECT (rpl_fwrite,
+                          (const void *__restrict, size_t, size_t,
+                           FILE *__restrict),
+                          fwrite);
+extern size_t __REDIRECT (rpl_fwrite_unlocked,
+                          (const void *__restrict, size_t, size_t,
+                           FILE *__restrict),
+                          fwrite_unlocked);
+#   define fwrite rpl_fwrite
+#   define fwrite_unlocked rpl_fwrite_unlocked
 #  endif
 # endif
 _GL_CXXALIASWARN (fwrite);