• Russ Cox's avatar
    cmd/cgo: add #line directives to avoid printing bogus references to Go source files · b2290229
    Russ Cox authored
    A bit contrived to come up with an example, but it happened in #15836, somehow.
    
    	$ cat /tmp/x.go
    	package main
    
    	/*
    	#include <stddef.h>
    
    	int foo(void);
    
    	int foo(void) {
    		return 2;
    	}
    
    	#define int asdf
    	*/
    	import "C"
    
    	func main() {
    		println(C.foo())
    	}
    
    	$ go run /tmp/x.go
    	# command-line-arguments
    	cgo-builtin-prolog:9:31: error: unknown type name 'asdf'   <<<<<
    	_GoString_ GoStringN(char *p, int l);
    	                              ^
    	/tmp/x.go:12:13: note: expanded from macro 'int'
    	#define int asdf
    	            ^
    	cgo-builtin-prolog:10:28: error: unknown type name 'asdf'  <<<<<
    	_GoBytes_ GoBytes(void *p, int n);
    	                           ^
    	/tmp/x.go:12:13: note: expanded from macro 'int'
    	#define int asdf
    	            ^
    	2 errors generated.
    
    The two marked lines used to refer incorrectly to /tmp/x.go.
    
    Fixes #15836.
    
    Change-Id: I08ef60a53cfd148112fceb651eaf7b75d94a7a8d
    Reviewed-on: https://go-review.googlesource.com/32613
    Run-TryBot: Russ Cox <rsc@golang.org>
    TryBot-Result: Gobot Gobot <gobot@golang.org>
    Reviewed-by: default avatarIan Lance Taylor <iant@golang.org>
    b2290229
gcc.go 60.1 KB