Is the following code supposed to work? Not sure whether I'm doing
something wrong or cgo just doesn't support this style of #defines. I
reduced it down to a simple test case, but the actual problem I ran into
came from some 3rd party .h files that unfortunately I have no control over.
package main
/*
#include <stdio.h>
#define VERSION_A "1.2.3"
*#define VERSION_B VERSION_A*
void f() {
printf("VERSION_A: %s, VERSION_B: %s\n", VERSION_A, VERSION_B);
}
*/
import "C"
import "fmt"
func main() {
C.f()
fmt.Println("VERSION_A:", C.VERSION_A)
// This does not compile
fmt.Println("VERSION_B:", C.VERSION_B)
}
The error I get:
% go run cgodefine.go
# command-line-arguments
/tmp/go-build088092139/command-line-arguments/_obj/_cgo_main.o:(.data.rel+0x0):
undefined reference to `VERSION_A'
collect2: error: ld returned 1 exit status
If I run:
% go tool cgo -godefs cgodefine.go
I end up with:
// Created by cgo -godefs - DO NOT EDIT
// cgo -godefs cgodefine.go
package main
import "fmt"
func main() {
_Cfunc_f()
fmt.Println("VERSION_A:", "1.2.3")
*fmt.Println("VERSION_B:", *_Cvar_VERSION_B)*
}
Thank you for your help.
Dragos
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