diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/format/ms_null-1.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/format/ms_null-1.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/format/ms_null-1.c b/gcc/testsuite/gcc.dg/format/ms_null-1.c new file mode 100644 index 000000000..91495016e --- /dev/null +++ b/gcc/testsuite/gcc.dg/format/ms_null-1.c @@ -0,0 +1,28 @@ +/* Test for some aspects of null format string handling. */ +/* Origin: Jason Thorpe <thorpej@wasabisystems.com> */ +/* { dg-do compile { target { *-*-mingw* } } } */ +/* { dg-options "-std=gnu99 -Wformat" } */ + +#define USE_SYSTEM_FORMATS +#include "format.h" + +extern void my_printf (const char *, ...) __attribute__((format(ms_printf,1,2))); +extern const char *my_format (const char *, const char *) + __attribute__((format_arg(2))); + +void +foo (int i1) +{ + /* Warning about a null format string has been decoupled from the actual + format check. However, we still expect to be warned about any excess + arguments after a null format string. */ + my_printf (NULL); + my_printf (NULL, i1); /* { dg-warning "too many" "null format with arguments" } */ + + my_printf (my_format ("", NULL)); + my_printf (my_format ("", NULL), i1); /* { dg-warning "too many" "null format_arg with arguments" } */ + + /* While my_printf allows a null argument, dgettext does not, so we expect + a null argument warning here. */ + my_printf (dgettext ("", NULL)); /* { dg-warning "null" "null format with dgettext" } */ +} |