x/mobile: iOS binding generation fails when package name starts with an uppercase

[omartin]

Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

1.8.3

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/olive/go"
GORACE=""
GOROOT="/usr/local/go"
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/jc/w249cklx2k12hyfc5bl1zzpc0000gn/T/go-build190811611=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"
PKG_CONFIG="pkg-config"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"

What did you do?

gomobile bind -target ios

With a simple file :

package Foo

type Foo struct {
}

=> fails

But if I use
package foo

It works

What did you expect to see?

It should generate the iOS binding

What did you see instead?

gomobile: darwin-armv7: go build -pkgdir=/Users/olive/go/pkg/gomobile/pkg_darwin_arm -tags ios -buildmode=c-archive -o /var/folders/jc/w249cklx2k12hyfc5bl1zzpc0000gn/T/gomobile-work-917987727/Foo-arm.a /var/folders/jc/w249cklx2k12hyfc5bl1zzpc0000gn/T/gomobile-work-917987727/src/iosbin/main.go failed: exit status 2
# _/var/folders/jc/w249cklx2k12hyfc5bl1zzpc0000gn/T/gomobile-work-917987727/src/gomobile_bind
/var/folders/jc/w249cklx2k12hyfc5bl1zzpc0000gn/T/gomobile-work-917987727/src/gomobile_bind/Foo.m:12:17: error: cannot find interface declaration for 'FooFoo' [-Werror]
/var/folders/jc/w249cklx2k12hyfc5bl1zzpc0000gn/T/gomobile-work-917987727/src/gomobile_bind/Foo.m:16:10: error: 'FooFoo' cannot use 'super' because it is a root class
/var/folders/jc/w249cklx2k12hyfc5bl1zzpc0000gn/T/gomobile-work-917987727/src/gomobile_bind/Foo.m:17:14: error: use of undeclared identifier '__ref'
/var/folders/jc/w249cklx2k12hyfc5bl1zzpc0000gn/T/gomobile-work-917987727/src/gomobile_bind/Foo.m:22:10: error: 'FooFoo' cannot use 'super' because it is a root class
/var/folders/jc/w249cklx2k12hyfc5bl1zzpc0000gn/T/gomobile-work-917987727/src/gomobile_bind/Foo.m:24:3: error: use of undeclared identifier '__ref'
/var/folders/jc/w249cklx2k12hyfc5bl1zzpc0000gn/T/gomobile-work-917987727/src/gomobile_bind/Foo.m:12:17: error: class 'FooFoo' defined without specifying a base class [-Werror,-Wobjc-root-class]
/var/folders/jc/w249cklx2k12hyfc5bl1zzpc0000gn/T/gomobile-work-917987727/src/gomobile_bind/Foo.m:12:23: note: add a super class to fix this problem

[gopherbot]

Change https://golang.org/cl/101116 mentions this issue: bind: avoid header guard clashes for uppercase Go packages