Comment 1 by gith.tech:

• I believe SDL uses dlopen(), instead of "CGO_LDFLAGS=-lGL"
• I see this with nVidia but not MESA.
• Along with gdb, both strace ltrace work without a segfault.
Perhaps there is some weird obfuscation code in the nVidia GL.  What's common with gdb
and strace, a fork() ?

Comment 2:

Can you please provide a test case?
It's very hard to diagnose these issues without test cases.

Comment 3:

Status changed to WaitingForReply.

Comment 4:

Sure.
------------------------------------------------
package main
import "gl"
import "fmt"
func main() {
    fmt.Println("Hi")
    gl.Init()
}
------------------------------------------------
The most interesting part, that it doesn't even print this "Hi" line. Simply segfaults.
Runs fine under the debugger.

Comment 5 by gith.tech:

This appears to be a problem with nVidia 260 / linux 2.6.36.
Reverting to nVidia 256 / linux 2.6.34 worked for me.

Comment 6:

Can you try with the latest cgo and see if it makes a difference.

Comment 7:

Same thing. Works under gdb, strace, etc. Without any tools segfaults..

Comment 8:

The fact that reverting to nVidia 256 makes it work suggests that this is not a Go
problem.
Running under gdb or strace may affect where the stack gets mapped or may serialize the
program so that there is no actual simultaneous execution across threads.

Status changed to WontFix.