Bug 1311211: Disable -Gw optimization when building for ASan on Windows. r=glandium

js/src/old-configure.in

@@ -752,8 +752,11 @@ case "$target" in
         CXXFLAGS="$CXXFLAGS -FS"
         dnl VS2013+ supports -Gw for better linker optimizations.
         dnl http://blogs.msdn.com/b/vcblog/archive/2013/09/11/introducing-gw-compiler-switch.aspx
-        CFLAGS="$CFLAGS -Gw"
-        CXXFLAGS="$CXXFLAGS -Gw"
+        dnl Disabled on ASan because it causes false-positive ODR violations.
+        if test -z "$MOZ_ASAN"; then
+            CFLAGS="$CFLAGS -Gw"
+            CXXFLAGS="$CXXFLAGS -Gw"
+        fi
         # khuey says we can safely ignore MSVC warning C4251
         # MSVC warning C4244 (implicit type conversion may lose data) warns
         # and requires workarounds for perfectly valid code.  Also, GCC/clang

old-configure.in

@@ -1075,8 +1075,11 @@ case "$target" in
         CXXFLAGS="$CXXFLAGS -FS"
         dnl VS2013+ supports -Gw for better linker optimizations.
         dnl http://blogs.msdn.com/b/vcblog/archive/2013/09/11/introducing-gw-compiler-switch.aspx
-        CFLAGS="$CFLAGS -Gw"
-        CXXFLAGS="$CXXFLAGS -Gw"
+        dnl Disabled on ASan because it causes false-positive ODR violations.
+        if test -z "$MOZ_ASAN"; then
+            CFLAGS="$CFLAGS -Gw"
+            CXXFLAGS="$CXXFLAGS -Gw"
+        fi
         # khuey says we can safely ignore MSVC warning C4251
         # MSVC warning C4244 (implicit type conversion may lose data) warns
         # and requires workarounds for perfectly valid code.  Also, GCC/clang