cmd/cgo,cmd/fix,misc/cgo: map the EGLConfig C type to uintptr in Go

Similarly to EGLDisplay, EGLConfig is declared as a pointer but may
contain non-pointer values.

I believe this is the root cause of https://todo.sr.ht/~eliasnaur/gio/121.

Change-Id: I412c4fbc2eef4aa028534d68bda95db98e3a365d
Reviewed-on: https://go-review.googlesource.com/c/go/+/235817
Run-TryBot: Elias Naur <mail@eliasnaur.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

2 files changed, 11 insertions, 6 deletions

diff --git a/src/cmd/cgo/doc.go b/src/cmd/cgo/doc.go
index 8c3bf81bf7..4366df4b55 100644
--- a/src/cmd/cgo/doc.go
+++ b/src/cmd/cgo/doc.go
@@ -413,7 +413,7 @@ type in Go are instead represented by a uintptr. Those include:
 	jobjectArray
 	jweak
 
-3. The EGLDisplay type from the EGL API.
+3. The EGLDisplay and EGLConfig types from the EGL API.
 
 These types are uintptr on the Go side because they would otherwise
 confuse the Go garbage collector; they are sometimes not really
@@ -429,11 +429,16 @@ from Go 1.9 and earlier, use the cftype or jni rewrites in the Go fix tool:
 
 It will replace nil with 0 in the appropriate places.
 
-The EGLDisplay case were introduced in Go 1.12. Use the egl rewrite
+The EGLDisplay case was introduced in Go 1.12. Use the egl rewrite
 to auto-update code from Go 1.11 and earlier:
 
 	go tool fix -r egl <pkg>
 
+The EGLConfig case was introduced in Go 1.15. Use the eglconf rewrite
+to auto-update code from Go 1.14 and earlier:
+
+	go tool fix -r eglconf <pkg>
+
 Using cgo directly
 
 Usage:
diff --git a/src/cmd/cgo/gcc.go b/src/cmd/cgo/gcc.go
index edcbd8d2d1..d903a7afb5 100644
--- a/src/cmd/cgo/gcc.go
+++ b/src/cmd/cgo/gcc.go
@@ -3029,7 +3029,7 @@ func (c *typeConv) badPointerTypedef(dt *dwarf.TypedefType) bool {
 	if c.badJNI(dt) {
 		return true
 	}
-	if c.badEGLDisplay(dt) {
+	if c.badEGLType(dt) {
 		return true
 	}
 	return false
@@ -3168,11 +3168,11 @@ func (c *typeConv) badJNI(dt *dwarf.TypedefType) bool {
 	return false
 }
 
-func (c *typeConv) badEGLDisplay(dt *dwarf.TypedefType) bool {
-	if dt.Name != "EGLDisplay" {
+func (c *typeConv) badEGLType(dt *dwarf.TypedefType) bool {
+	if dt.Name != "EGLDisplay" && dt.Name != "EGLConfig" {
 		return false
 	}
-	// Check that the typedef is "typedef void *EGLDisplay".
+	// Check that the typedef is "typedef void *<name>".
 	if ptr, ok := dt.Type.(*dwarf.PtrType); ok {
 		if _, ok := ptr.Type.(*dwarf.VoidType); ok {
 			return true