llvm-project/clang/test/Preprocessor/if_warning.c

// RUN: %clang_cc1 %s -Eonly -Werror=undef -verify
// RUN: %clang_cc1 %s -Eonly -Werror-undef -verify

extern int x;

#if foo   // expected-error {{'foo' is not defined, evaluates to 0}}
#endif

#ifdef foo
#endif

#if defined(foo)
#endif


// PR3938
#if 0
#ifdef D
#else 1       // Should not warn due to C99 6.10p4
#endif
#endif
Update tests to use %clang_cc1 instead of 'clang-cc' or 'clang -cc1'. - This is designed to make it obvious that %clang_cc1 is a "test variable" which is substituted. It is '%clang_cc1' instead of '%clang -cc1' because it can be useful to redefine what gets run as 'clang -cc1' (for example, to set a default target). llvm-svn: 91446 2009-12-16 04:14:24 +08:00			`// RUN: %clang_cc1 %s -Eonly -Werror=undef -verify`
			`// RUN: %clang_cc1 %s -Eonly -Werror-undef -verify`
add support for -Wundef. llvm-svn: 46274 2008-01-24 01:19:46 +08:00
convert test to -verify style. llvm-svn: 69412 2009-04-18 09:33:54 +08:00			`extern int x;`

			`#if foo // expected-error {{'foo' is not defined, evaluates to 0}}`
add support for -Wundef. llvm-svn: 46274 2008-01-24 01:19:46 +08:00			`#endif`

			`#ifdef foo`
			`#endif`

			`#if defined(foo)`
			`#endif`

Fix PR3938 by taking into account C99 6.10p4. llvm-svn: 69413 2009-04-18 09:34:22 +08:00
			`// PR3938`
			`#if 0`
			`#ifdef D`
			`#else 1 // Should not warn due to C99 6.10p4`
			`#endif`
			`#endif`