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| extern unsigned int a; | |
| extern unsigned int b; | |
| int main(int c, const char** v) | |
| { | |
| if (a-b<0) | |
| return 0; | |
| return 1; | |
| } | |
| clang test.c -o test.o | |
| test.c:6:9: warning: comparison of unsigned expression < 0 is always false [-Wtautological-compare] | |
| if (a-b<0) | |
| ~~~^~ |
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