llvm-project/clang/test/SemaCXX/builtin-exception-spec.cpp

// RUN: %clang_cc1 -isystem %S/Inputs -fsyntax-only -verify %s
#include <malloc.h>

extern "C" {
void *malloc(__SIZE_TYPE__);
}
Work around an annoying, non-standard optimization in the glibc headers, where malloc (and many other libc functions) are declared with empty throw specifications, e.g., extern void malloc (__SIZE_TYPE__ __size) throw () __attribute__ ((__malloc__)) ; The C++ standard doesn't seem to allow this, and redeclaring malloc as the standard permits (as follows) resulted in Clang (rightfully!) complaining about mis-matched exception specifications. void malloc(size_t size); We work around this by silently propagating an empty throw specification "throw()" from a function with C linkage declared in a system header to a redeclaration that has no throw specifier. Ick. llvm-svn: 95969 2010-02-12 15:32:17 +08:00			`// RUN: %clang_cc1 -isystem %S/Inputs -fsyntax-only -verify %s`
			`#include <malloc.h>`

			`extern "C" {`
			`void *malloc(__SIZE_TYPE__);`
			`}`