build: cleanup GCC < 4.6 -Wlogical-op workaround

Signed-off-by: NPavel Hrdina <phrdina@redhat.com>
(cherry picked from commit 7fb81831)

m4/virt-compile-warnings.m4

@@ -236,7 +236,7 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
 
     if test "$gl_cv_warn_c__Wlogical_op" = yes &&
        test "$lv_cv_gcc_wlogical_op_broken" = yes; then
-      AC_DEFINE_UNQUOTED([BROKEN_GCC_WLOGICALOP], 1,
+      AC_DEFINE_UNQUOTED([BROKEN_GCC_WLOGICALOP_STRCHR], 1,
        [Define to 1 if gcc -Wlogical-op reports false positives on strchr])
     fi
 ])

src/internal.h

@@ -253,6 +253,16 @@
 #  define VIR_WARNINGS_RESET
 # endif
 
+/* Workaround bogus GCC < 4.6 that produces false -Wlogical-op warnings for
+ * strchr(). Those old GCCs don't support push/pop. */
+# if BROKEN_GCC_WLOGICALOP_STRCHR
+#  define VIR_WARNINGS_NO_WLOGICALOP_STRCHR                \
+    _Pragma ("GCC diagnostic ignored \"-Wlogical-op\"")
+# else
+#  define VIR_WARNINGS_NO_WLOGICALOP_STRCHR
+# endif
+
+
 /*
  * Use this when passing possibly-NULL strings to printf-a-likes.
  */

src/util/virbuffer.c

@@ -421,14 +421,9 @@ virBufferVasprintf(virBufferPtr buf, const char *format, va_list argptr)
     buf->use += count;
 }
 
-/* Work around spurious strchr() diagnostics given by -Wlogical-op
- * for gcc < 4.6.  Doing it via a local pragma keeps the damage
- * smaller than disabling it on the package level.  Unfortunately, the
- * affected GCCs don't allow diagnostic push/pop which would have
- * further reduced the impact. */
-#if BROKEN_GCC_WLOGICALOP
-# pragma GCC diagnostic ignored "-Wlogical-op"
-#endif
+
+VIR_WARNINGS_NO_WLOGICALOP_STRCHR
+
 
 /**
  * virBufferEscapeString:

src/util/virstring.c

@@ -986,14 +986,7 @@ virStringHasControlChars(const char *str)
 }
 
 
-/* Work around spurious strchr() diagnostics given by -Wlogical-op
- * for gcc < 4.6.  Doing it via a local pragma keeps the damage
- * smaller than disabling it on the package level.  Unfortunately, the
- * affected GCCs don't allow diagnostic push/pop which would have
- * further reduced the impact. */
-#if BROKEN_GCC_WLOGICALOP
-# pragma GCC diagnostic ignored "-Wlogical-op"
-#endif
+VIR_WARNINGS_NO_WLOGICALOP_STRCHR
 
 
 /**

src/util/virsysinfo.c

@@ -428,17 +428,8 @@ virSysinfoRead(void)
 
 
 #elif defined(__s390__) || defined(__s390x__)
-/*
-  we need to ignore warnings about strchr caused by -Wlogical-op
-  for some GCC versions.
-  Doing it via a local pragma keeps the damage smaller than
-  disabling it on the package level.
-  Unfortunately, the affected GCCs don't allow diagnostic push/pop
-  which would have further reduced the impact.
- */
-# if BROKEN_GCC_WLOGICALOP
-#  pragma GCC diagnostic ignored "-Wlogical-op"
-# endif
+
+VIR_WARNINGS_NO_WLOGICALOP_STRCHR
 
 static char *
 virSysinfoParseDelimited(const char *base, const char *name, char **value,