Bug 797793 - Disable format warnings on mingw r=glandium

configure.in

@@ -2165,6 +2165,11 @@ ia64*-hpux*)
         DLL_PREFIX=
         IMPORT_LIB_SUFFIX=dll.a
         GCC_VERSION=`$CC -v 2>&1 | awk '/^gcc version/ { print $3 }'`
+
+        # We use mix of both POSIX and Win32 printf format across the tree, so format
+        # warnings are useless on mingw.
+        MOZ_C_SUPPORTS_WARNING(-Wno-, format, ac_c_has_wno_format)
+        MOZ_CXX_SUPPORTS_WARNING(-Wno-, format, ac_cxx_has_wno_format)
     else
         TARGET_COMPILER_ABI=msvc
         HOST_CC='$(CC)'

js/src/configure.in

@@ -1735,6 +1735,11 @@ ia64*-hpux*)
         DLL_PREFIX=
         IMPORT_LIB_SUFFIX=dll.a
         GCC_VERSION=`$CC -v 2>&1 | awk '/^gcc version/ { print $3 }'`
+
+        # We use mix of both POSIX and Win32 printf format across the tree, so format
+        # warnings are useless on mingw.
+        MOZ_C_SUPPORTS_WARNING(-Wno-, format, ac_c_has_wno_format)
+        MOZ_CXX_SUPPORTS_WARNING(-Wno-, format, ac_cxx_has_wno_format)
     else
         TARGET_COMPILER_ABI=msvc
         HOST_CC='$(CC)'