[libvirt] [PATCH 1/2] build: cleanup GCC < 4.6 -Wlogical-op workaround

[Pavel Hrdina]

Signed-off-by: Pavel Hrdina <phrdina at redhat.com>
---
 m4/virt-compile-warnings.m4 |  2 +-
 src/internal.h              | 10 ++++++++++
 src/util/virbuffer.c        | 11 +++--------
 src/util/virstring.c        |  9 +--------
 src/util/virsysinfo.c       | 13 ++-----------
 5 files changed, 17 insertions(+), 28 deletions(-)

diff --git a/m4/virt-compile-warnings.m4 b/m4/virt-compile-warnings.m4
index 3dd0665..1b0a2cf 100644
--- a/m4/virt-compile-warnings.m4
+++ b/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
 ])
diff --git a/src/internal.h b/src/internal.h
index 9ebaf3c..bc3126f 100644
--- a/src/internal.h
+++ b/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 doesn'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.
  */
diff --git a/src/util/virbuffer.c b/src/util/virbuffer.c
index 43cd1a7..d582e7d 100644
--- a/src/util/virbuffer.c
+++ b/src/util/virbuffer.c
@@ -417,14 +417,9 @@ 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:
diff --git a/src/util/virstring.c b/src/util/virstring.c
index 7ec42aa..2d7fbf3 100644
--- a/src/util/virstring.c
+++ b/src/util/virstring.c
@@ -989,14 +989,7 @@ 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
 
 
 /**
diff --git a/src/util/virsysinfo.c b/src/util/virsysinfo.c
index 05d33a8..e8dbd4d 100644
--- a/src/util/virsysinfo.c
+++ b/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,
-- 
2.8.1