+++ /dev/null
-/* C99 6.10.8 para 4: None of [the predefined macro names] shall be
- the subject of a #define or an #undef preprocessing directive. We
- pass -fno-show-column as otherwise dejagnu gets confused. */
-
-/* { dg-do preprocess } */
-/* { dg-options "-fno-show-column" } */
-
-#undef __DATE__ /* { dg-warning "undefining" "__DATE__" } */
-#undef __TIME__ /* { dg-warning "undefining" "__TIME__" } */
-#undef __FILE__ /* { dg-warning "undefining" "__FILE__" } */
-#undef __LINE__ /* { dg-warning "undefining" "__LINE__" } */
-#undef __STDC__ /* { dg-warning "undefining" "__STDC__" } */
-
-/* These should be protected from #undef, but aren't, because they
- are set with normal #define commands - and on top of that, some
- of them are library properties, outside our control. To consider:
- warn about undefining/redefining any identifier beginning with
- __STDC_ .
-
- __STDC_HOSTED__
- __STDC_VERSION__
- __STDC_IEC_559__
- __STDC_IEC_559_COMPLEX__
- __STDC_ISO_10646__
- */