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cgo: add basic gccgo support.

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R=rsc, iant
CC=golang-dev, remy
https://golang.org/cl/5485070
This commit is contained in:
Rémy Oudompheng 2011-12-14 15:40:35 -08:00 committed by Ian Lance Taylor
parent d89b7173c2
commit 076ebed0d8
2 changed files with 56 additions and 3 deletions
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2
src/cmd/cgo/main.go
View File

@ -130,6 +130,8 @@ var dynobj = flag.String("dynimport", "", "if non-empty, print dynamic import da
var godefs = flag.Bool("godefs", false, "for bootstrap: write Go definitions for C file to standard output")
var cdefs = flag.Bool("cdefs", false, "for bootstrap: write C definitions for C file to standard output")
var gccgo = flag.Bool("gccgo", false, "generate files for use with gccgo")
var goarch, goos string
func main() {

57
src/cmd/cgo/out.go
View File

@ -46,7 +46,9 @@ func (p *Package) writeDefs() {
fmt.Fprintf(fgo2, "package %s\n\n", p.PackageName)
fmt.Fprintf(fgo2, "import \"unsafe\"\n\n")
fmt.Fprintf(fgo2, "import \"syscall\"\n\n")
fmt.Fprintf(fgo2, "import _ \"runtime/cgo\"\n\n")
if !*gccgo {
fmt.Fprintf(fgo2, "import _ \"runtime/cgo\"\n\n")
}
fmt.Fprintf(fgo2, "type _ unsafe.Pointer\n\n")
fmt.Fprintf(fgo2, "func _Cerrno(dst *error, x int) { *dst = syscall.Errno(x) }\n")
@ -57,7 +59,11 @@ func (p *Package) writeDefs() {
}
fmt.Fprintf(fgo2, "type _Ctype_void [0]byte\n")
fmt.Fprintf(fc, cProlog)
if *gccgo {
fmt.Fprintf(fc, cPrologGccgo)
} else {
fmt.Fprintf(fc, cProlog)
}
cVars := make(map[string]bool)
for _, n := range p.Name {
@ -238,13 +244,22 @@ func (p *Package) writeDefsFunc(fc, fgo2 *os.File, n *Name) {
Type: gtype,
}
printer.Fprint(fgo2, fset, d)
fmt.Fprintf(fgo2, "\n")
if *gccgo {
fmt.Fprintf(fgo2, " __asm__(\"%s\")\n", n.C)
} else {
fmt.Fprintf(fgo2, "\n")
}
if name == "CString" || name == "GoString" || name == "GoStringN" || name == "GoBytes" {
// The builtins are already defined in the C prolog.
return
}
// gccgo does not require a wrapper unless an error must be returned.
if *gccgo && !n.AddError {
return
}
var argSize int64
_, argSize = p.structType(n)
@ -730,6 +745,42 @@ void
}
`
const cPrologGccgo = `
#include <stdint.h>
#include <string.h>
struct __go_string {
const unsigned char *__data;
int __length;
};
typedef struct __go_open_array {
void* __values;
int __count;
int __capacity;
} Slice;
struct __go_string __go_byte_array_to_string(const void* p, int len);
struct __go_open_array __go_string_to_byte_array (struct __go_string str);
const char *CString(struct __go_string s) {
return strndup(s.__data, s.__length);
}
struct __go_string GoString(char *p) {
return __go_byte_array_to_string(p, strlen(p));
}
struct __go_string GoStringN(char *p, int n) {
return __go_byte_array_to_string(p, n);
}
Slice GoBytes(char *p, int n) {
struct __go_string s = { p, n };
return __go_string_to_byte_array(s);
}
`
const gccExportHeaderProlog = `
typedef unsigned int uint;
typedef signed char schar;