AS_CASE([$CC], [*clang*],
[CC_CHECK_FLAGS_APPEND([with_cppflags], [CPPFLAGS], [\
- -Wno-typedef-redefinition])])
+ -Wno-typedef-redefinition \
+ -Wno-gnu-variable-sized-type-not-at-end \
+ ])])
AS_CASE([$CFLAGS], [*-O[[12345\ ]]*],
[CC_CHECK_FLAGS_APPEND([with_cflags], [CFLAGS], [\