gcc-4.7: Fix incorrect warning with -Wcast-qual

This patch backport the fix where -Wcast-qual
reports a bogus warning with 4.7.2, There is
no workaround in code that can be done to avoid
it hence the fix to gcc is backported.

(From OE-Core rev: 5d8ef98225773a6ec88b5e1a76ce01d76163b3a5)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 45 insertions, 1 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-4.7.inc b/meta/recipes-devtools/gcc/gcc-4.7.inc
index 8735e48896..49f4010b49 100644
--- a/meta/recipes-devtools/gcc/gcc-4.7.inc
+++ b/meta/recipes-devtools/gcc/gcc-4.7.inc
@@ -1,6 +1,6 @@
 require gcc-common.inc
 
-PR = "r18"
+PR = "r19"
 
 # Third digit in PV should be incremented after a minor release
 # happens from this branch on gcc e.g. currently its 4.7.1
@@ -75,6 +75,7 @@ SRC_URI = "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2 \
            file://0001-crtstuff.c-USE_PT_GNU_EH_FRAME-Define-for-systems-us.patch \
            file://0001-Makefile.in-vis_hide-gen-hide-list-Do-not-make-defin.patch \
            file://use-ml-conf-files-from-B.patch \
+           file://wcast-qual-PR55383.patch \
           "
 SRC_URI[md5sum] = "cc308a0891e778cfda7a151ab8a6e762"
 SRC_URI[sha256sum] = "8a9283d7010fb9fe5ece3ca507e0af5c19412626384f8a5e9434251ae100b084"
diff --git a/meta/recipes-devtools/gcc/gcc-4.7/wcast-qual-PR55383.patch b/meta/recipes-devtools/gcc/gcc-4.7/wcast-qual-PR55383.patch
new file mode 100644
index 0000000000..7c5bbe7620
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-4.7/wcast-qual-PR55383.patch
@@ -0,0 +1,43 @@
+This is a backport from gcc bugzilla
+
+http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55383
+
+fixes wrong warning behavior which has no workaround
+other than disabling the warning
+
+Upstream-Status: Backport
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+Index: gcc-4.7.2/gcc/c-typeck.c
+===================================================================
+--- gcc-4.7.2.orig/gcc/c-typeck.c       2012-09-13 10:04:44.000000000 -0700
++++ gcc-4.7.2/gcc/c-typeck.c    2013-03-10 23:09:17.610899536 -0700
+@@ -4557,7 +4557,7 @@
+     /* There are qualifiers present in IN_OTYPE that are not present
+        in IN_TYPE.  */
+     warning_at (loc, OPT_Wcast_qual,
+-               "cast discards %q#v qualifier from pointer target type",
++               "cast discards %qv qualifier from pointer target type",
+                discarded);
+ 
+   if (added || discarded)
+Index: gcc-4.7.2/gcc/testsuite/c-c++-common/Wcast-qual-1.c
+===================================================================
+--- gcc-4.7.2.orig/gcc/testsuite/c-c++-common/Wcast-qual-1.c    2011-04-07 14:47:38.000000000 -0700
++++ gcc-4.7.2/gcc/testsuite/c-c++-common/Wcast-qual-1.c 2013-03-10 23:15:45.610894589 -0700
+@@ -85,11 +85,11 @@
+ void
+ f4 (void * const **bar)
+ {
+-  const void ***p9 = (const void ***) bar; /* { dg-warning "cast" } */
++  const void ***p9 = (const void ***) bar; /* { dg-warning "cast discards .const. qualifier" } */
+   void * const **p11 = (void * const **) bar;
+-  void ** const *p13 = (void ** const *) bar; /* { dg-warning "cast" } */
++  void ** const *p13 = (void ** const *) bar; /* { dg-warning "cast discards .const. qualifier" } */
+   const void * const **p15 = (const void * const **) bar; /* { dg-warning "cast" } */
+-  const void ** const *p17 = (const void ** const *) bar; /* { dg-warning "cast" } */
++  const void ** const *p17 = (const void ** const *) bar; /* { dg-warning "cast discards .const. qualifier" } */
+   void * const * const * p19 = (void * const * const *) bar;
+   const void * const * const *p21 = (const void * const * const *) bar;
+ }