1 // RUN: %clang_cc1 -std=gnu89 -fsyntax-only -verify %s
2 // RUN: %clang_cc1 -fsyntax-only -verify %s
3
4 #if __STDC_VERSION__ >= 199901
5 #define GNU_INLINE __attribute((__gnu_inline__))
6 #else
7 #define GNU_INLINE
8 #endif
9
10 // PR5253
11 // rdar://9559708 (same extension in C99 mode)
12 // GNU Extension: check that we can redefine an extern inline function
f(int a)13 GNU_INLINE extern inline int f(int a) {return a;}
f(int b)14 int f(int b) {return b;} // expected-note{{previous definition is here}}
15 // And now check that we can't redefine a normal function
f(int c)16 int f(int c) {return c;} // expected-error{{redefinition of 'f'}}
17
18 // Check that we can redefine an extern inline function as a static function
g(int a)19 GNU_INLINE extern inline int g(int a) {return a;}
g(int b)20 static int g(int b) {return b;}
21
22 // Check that we ensure the types of the two definitions are the same
h(int a)23 GNU_INLINE extern inline int h(int a) {return a;} // expected-note{{previous definition is here}}
h(short b)24 int h(short b) {return b;} // expected-error{{conflicting types for 'h'}}
25