xref: /aosp_15_r20/external/clang/test/Preprocessor/if_warning.c (revision 67e74705e28f6214e480b399dd47ea732279e315) 
1*67e74705SXin Li // RUN: %clang_cc1 %s -Eonly -Werror=undef -verify
2*67e74705SXin Li // RUN: %clang_cc1 %s -Eonly -Werror-undef -verify
3*67e74705SXin Li 
4*67e74705SXin Li extern int x;
5*67e74705SXin Li 
6*67e74705SXin Li #if foo   // expected-error {{'foo' is not defined, evaluates to 0}}
7*67e74705SXin Li #endif
8*67e74705SXin Li 
9*67e74705SXin Li #ifdef foo
10*67e74705SXin Li #endif
11*67e74705SXin Li 
12*67e74705SXin Li #if defined(foo)
13*67e74705SXin Li #endif
14*67e74705SXin Li 
15*67e74705SXin Li 
16*67e74705SXin Li // PR3938
17*67e74705SXin Li #if 0
18*67e74705SXin Li #ifdef D
19*67e74705SXin Li #else 1       // Should not warn due to C99 6.10p4
20*67e74705SXin Li #endif
21*67e74705SXin Li #endif
22*67e74705SXin Li 
23*67e74705SXin Li // rdar://9475098
24*67e74705SXin Li #if 0
25*67e74705SXin Li #else 1   // expected-warning {{extra tokens}}
26*67e74705SXin Li #endif
27*67e74705SXin Li 
28*67e74705SXin Li // PR6852
29*67e74705SXin Li #if 'somesillylongthing'  // expected-warning {{character constant too long for its type}} \
30*67e74705SXin Li                           // expected-warning {{multi-character character constant}}
31*67e74705SXin Li #endif
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