diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/cpp/undef2.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/cpp/undef2.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/cpp/undef2.c b/gcc/testsuite/gcc.dg/cpp/undef2.c new file mode 100644 index 00000000000..3ecfb6e9b6d --- /dev/null +++ b/gcc/testsuite/gcc.dg/cpp/undef2.c @@ -0,0 +1,23 @@ +/* C99 6.10.8 para 4: None of [the predefined macro names] shall be the + subject of a #define or an #undef preprocessing directive. */ + +/* { dg-do preprocess } */ + +#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__ + */ |