cmd/cgo: stop using -fno-eliminate-unused-debug-types
This flag was added in January 2010, in CL 181102, to fix issue 497.
(Numbers were just shorter back then.) The fix was for OS X machines
and the llvm-gcc frontend.
In July 2011 we had to change the way we get enum values, because
there were no flags available to force Xcode's llvm-gcc to include the
enum names and values in DWARF debug output.
We now use clang, not llvm-gcc, on OS X machines.
Earlier versions of clang printed a warning about not knowing the flag.
Newer versions of clang now make that an error.
That is:
- The flag was added for OS X machines.
- The flag is no longer necessary on OS X machines.
- The flag now breaks some OS X machines.
Remove it.
I have run the original program from issue 497 successfully
without the flag on both OS X and Linux machines.
Fixes #6678.
R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/18850043
diff --git a/src/cmd/cgo/gcc.go b/src/cmd/cgo/gcc.go
index d31fc47..60d420b 100644
--- a/src/cmd/cgo/gcc.go
+++ b/src/cmd/cgo/gcc.go
@@ -742,13 +742,12 @@
// the input.
func (p *Package) gccCmd() []string {
c := append(p.gccBaseCmd(),
- "-w", // no warnings
- "-Wno-error", // warnings are not errors
- "-o"+gccTmp(), // write object to tmp
- "-gdwarf-2", // generate DWARF v2 debugging symbols
- "-fno-eliminate-unused-debug-types", // gets rid of e.g. untyped enum otherwise
- "-c", // do not link
- "-xc", // input language is C
+ "-w", // no warnings
+ "-Wno-error", // warnings are not errors
+ "-o"+gccTmp(), // write object to tmp
+ "-gdwarf-2", // generate DWARF v2 debugging symbols
+ "-c", // do not link
+ "-xc", // input language is C
)
if strings.Contains(c[0], "clang") {
c = append(c,
