llvm-project/clang/test/Sema/warn-extern-main.c
Aaron Ballman 22db4824b9 Use functions with prototypes when appropriate; NFC
A significant number of our tests in C accidentally use functions
without prototypes. This patch converts the function signatures to have
a prototype for the situations where the test is not specific to K&R C
declarations. e.g.,

  void func();

becomes

  void func(void);

This is the third batch of tests being updated (there are a significant
number of other tests left to be updated).
2022-02-07 09:25:01 -05:00

57 lines
1.3 KiB
C

// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST1
// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST2
// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST3
// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST4
// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST5
// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST6
// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST7
// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST8
// RUN: %clang_cc1 -fsyntax-only -verify %s -DTEST9 -ffreestanding
#if TEST1
int main; // expected-warning{{variable named 'main' with external linkage has undefined behavior}}
#elif TEST2
extern int main; // expected-warning{{variable named 'main' with external linkage has undefined behavior}}
#elif TEST3
// expected-no-diagnostics
void x(void) {
static int main;
}
#elif TEST4
void x(void) {
extern int main; // expected-warning{{variable named 'main' with external linkage has undefined behavior}}
}
#elif TEST5
// expected-no-diagnostics
void x(void) {
int main;
}
#elif TEST6
// expected-no-diagnostics
static int main;
#elif TEST7
// expected-no-diagnostics
void x(void) {
auto int main;
}
#elif TEST8
// expected-no-diagnostics
void x(void) {
register int main;
}
#elif TEST9
// expected-no-diagnostics
int main;
#else
#error Unknown Test
#endif