From: Florian Krohm <florian@eich-krohm.de>
Date: Mon, 14 Sep 2015 21:11:32 +0000 (+0000)
Subject: Do not compile with -Wcast-align on arm. There are too many
X-Git-Tag: svn/VALGRIND_3_12_0~357
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b41e80f2288b6c1fd013ace31fbc790457984e26;p=thirdparty%2Fvalgrind.git

Do not compile with -Wcast-align on arm. There are too many
warnings due to GCC being very conservative.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15651
---

diff --git a/Makefile.all.am b/Makefile.all.am
index 708e8d8910..44a6207ab3 100644
--- a/Makefile.all.am
+++ b/Makefile.all.am
@@ -100,12 +100,12 @@ AM_CFLAGS_BASE = \
 	-O2 -g \
 	-std=gnu99 \
 	-Wall \
-	-Wcast-align \
 	-Wmissing-prototypes \
 	-Wshadow \
 	-Wpointer-arith \
 	-Wstrict-prototypes \
 	-Wmissing-declarations \
+	@FLAG_W_CAST_ALIGN@ \
 	@FLAG_W_CAST_QUAL@ \
 	@FLAG_W_WRITE_STRINGS@ \
 	@FLAG_W_EMPTY_BODY@ \
diff --git a/configure.ac b/configure.ac
index f257d93c11..65d56c7d63 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1967,6 +1967,15 @@ AC_MSG_RESULT([-Wextra])
 ])
 CFLAGS=$safe_CFLAGS
 
+# On ARM we do not want to pass -Wcast-align as that produces loads
+# of warnings. GCC is just being conservative. See here:
+# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65459#c4
+if test "X$VGCONF_ARCH_PRI" = "Xarm"; then
+  AC_SUBST([FLAG_W_CAST_ALIGN], [""])
+else
+  AC_SUBST([FLAG_W_CAST_ALIGN], [-Wcast-align])
+fi
+
 # does this compiler support -fno-stack-protector ?
 AC_MSG_CHECKING([if gcc accepts -fno-stack-protector])