Fix build errors with -DNDEBUG.

        [BZ #18755]
        * iconv/skeleton.c (FUNCTION_NAME): Suppress -Wunused-but-set-variable
        warnings.
        * sysdeps/nptl/gai_misc.h (__gai_start_notify_thread): Same.
        (__gai_create_helper_thread): Same.
        * nscd/nscd.c (do_exit): Suppress -Wunused-variable.
        * iconvdata/iso-2022-cn-ext.c (BODY): Initialize local variable
        to suppress -Wmaybe-uninitialized warnings.

ChangeLog

@@ -1,3 +1,14 @@
+2016-01-15  Martin Sebor  <msebor@redhat.com>
+
+	[BZ #18755]
+	* iconv/skeleton.c (FUNCTION_NAME): Suppress -Wunused-but-set-variable
+	warnings.
+	* sysdeps/nptl/gai_misc.h (__gai_start_notify_thread): Same.
+	(__gai_create_helper_thread): Same.
+	* nscd/nscd.c (do_exit): Suppress -Wunused-variable.
+	* iconvdata/iso-2022-cn-ext.c (BODY): Initialize local variable
+	to suppress -Wmaybe-uninitialized warnings.
+
 2016-01-15  H.J. Lu  <hongjiu.lu@intel.com>
 
 	[BZ #19465]

iconv/skeleton.c

@@ -675,7 +675,7 @@ FUNCTION_NAME (struct __gconv_step *step, struct __gconv_step_data *data,
 #else
 		      /* We have a problem in one of the functions below.
 			 Undo the conversion upto the error point.  */
-		      size_t nstatus;
+		      size_t nstatus __attribute__ ((unused));
 
 		      /* Reload the pointers.  */
 		      *inptrp = inptr;

iconvdata/iso-2022-cn-ext.c

@@ -426,7 +426,7 @@ enum
       }									      \
     else								      \
       {									      \
-	unsigned char buf[2];						      \
+	unsigned char buf[2] = { 0, 0 };				      \
 	int used;							      \
 									      \
 	if (set == GB2312_set || ((ann & SO_ann) != CNS11643_1_ann	      \

nscd/nscd.c

@@ -659,7 +659,8 @@ do_exit (int child_ret, int errnum, const char *format, ...)
 {
   if (parent_fd != -1)
     {
-      int ret = write (parent_fd, &child_ret, sizeof (child_ret));
+      int ret __attribute__ ((unused));
+      ret = write (parent_fd, &child_ret, sizeof (child_ret));
       assert (ret == sizeof (child_ret));
       close (parent_fd);
     }
@@ -691,7 +692,8 @@ notify_parent (int child_ret)
   if (parent_fd == -1)
     return;
 
-  int ret = write (parent_fd, &child_ret, sizeof (child_ret));
+  int ret __attribute__ ((unused));
+  ret = write (parent_fd, &child_ret, sizeof (child_ret));
   assert (ret == sizeof (child_ret));
   close (parent_fd);
   parent_fd = -1;

sysdeps/nptl/gai_misc.h

@@ -81,7 +81,8 @@ __gai_start_notify_thread (void)
 {
   sigset_t ss;
   sigemptyset (&ss);
-  int sigerr = pthread_sigmask (SIG_SETMASK, &ss, NULL);
+  int sigerr __attribute__ ((unused));
+  sigerr = pthread_sigmask (SIG_SETMASK, &ss, NULL);
   assert_perror (sigerr);
 }
 
@@ -105,7 +106,8 @@ __gai_create_helper_thread (pthread_t *threadp, void *(*tf) (void *),
   sigset_t ss;
   sigset_t oss;
   sigfillset (&ss);
-  int sigerr = pthread_sigmask (SIG_SETMASK, &ss, &oss);
+  int sigerr __attribute__ ((unused));
+  sigerr = pthread_sigmask (SIG_SETMASK, &ss, &oss);
   assert_perror (sigerr);
 
   int ret = pthread_create (threadp, &attr, tf, arg);