[PATCH 7/8] sig2str: port --enable-gcc-warnings to clang

[Paul Eggert]

* lib/sig2str.c (sig2str): Avoid warning about unused printf argument.
---
 ChangeLog     |  3 +++
 lib/sig2str.c | 12 ++++++++----
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 35a57b4..baa594e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2013-05-15  Paul Eggert  <egg...@cs.ucla.edu>
 
+       sig2str: port --enable-gcc-warnings to clang
+       * lib/sig2str.c (sig2str): Avoid warning about unused printf argument.
+
        obstack: port --enable-gcc-warnings to clang
        * lib/obstack.h (obstack_ptr_grow_fast, obstack_int_grow_fast):
        Avoid casts from looser to stricter-aligned pointers.
diff --git a/lib/sig2str.c b/lib/sig2str.c
index 8b36e2f..6ead2a7 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;
   }
 }
-- 
1.7.11.7