Akira Hatanaka 884772fdd6
[Sema] Don't drop weak_import from a declaration if its definition isn't seen (#85886)
I believe this is what the original commit (33e022650adee965c65f9aea086ee74f3fd1bad5) was trying to do.

This fixes a bug where clang removes the attribute from a declaration that follows a declaration directly contained in a linkage-specification.

rdar://61865848
2024-07-17 16:19:21 -07:00

31 lines
1.5 KiB
C

// RUN: %clang_cc1 -verify -fsyntax-only %s
extern int f0(void) __attribute__((weak));
extern int g0 __attribute__((weak));
extern int g1 __attribute__((weak_import));
int f2(void) __attribute__((weak));
int g2 __attribute__((weak));
int g3 __attribute__((weak_import)); // expected-warning {{'weak_import' attribute cannot be specified on a definition}}
int __attribute__((weak_import)) g4(void);
void __attribute__((weak_import)) g5(void) {
}
struct __attribute__((weak)) s0 {}; // expected-warning {{'weak' attribute only applies to variables, functions, and classes}}
struct __attribute__((weak_import)) s1 {}; // expected-warning {{'weak_import' attribute only applies to variables and functions}}
static int f(void) __attribute__((weak)); // expected-error {{weak declaration cannot have internal linkage}}
static int x __attribute__((weak)); // expected-error {{weak declaration cannot have internal linkage}}
int C; // expected-note {{previous definition is here}}
extern int C __attribute__((weak_import)); // expected-warning {{'C' cannot be declared 'weak_import'}}
int C2; // expected-note {{previous definition is here}}
extern int C2;
extern int C2 __attribute__((weak_import)); // expected-warning {{'C2' cannot be declared 'weak_import'}}
static int pr14946_x;
extern int pr14946_x __attribute__((weak)); // expected-error {{weak declaration cannot have internal linkage}}
static void pr14946_f(void);
void pr14946_f(void) __attribute__((weak)); // expected-error {{weak declaration cannot have internal linkage}}