Compilation problem

[russel]

I am on Debian Sid, with it's Qt 5.11.2, with a downloaded Go 1.11.2 not the Debian Sid Go (which is 1.10 :-( ). I am trying to use modules outside of GOROOT. With: "github.com/jamalsa/qml" as one of the imports, I get the following

In file included from ../../../../../Built/Go/Dependencies/pkg/mod/github.com/jamalsa/qml@v0.0.0-20181101021924-25f43c5c22a3/cpp/private/qmetaobject_p.h:1,
                 from cpp/govalue.h:7,
                 from cpp/capi.cpp:10,
                 from all.cpp:2:
../../../../../Built/Go/Dependencies/pkg/mod/github.com/jamalsa/qml@v0.0.0-20181101021924-25f43c5c22a3/cpp/private/qtheader.h:70:37: fatal error: QtCore/5.11.2/QtCore/private/qmetaobject_p.h: No such file or directory
 #define QT_PRIVATE_HEADER(dir,file) <dir/QT_MAJOR.QT_MINOR.QT_MICRO/dir/private/file>

[jamalsa]

Can you try on GOROOT? Is it produce the same error?

[bcampbell]

OK, I had the same issue. There are a couple of separate parts to fixing it:
Firstly, the qml bindings require the Qt private headers, which are packaged separately under Debian eg:

sudo apt install qtbase5-private-dev qtdeclarative5-private-dev

Secondly, these private header packages aren't included by the pkg-config setup, so you have to manually specify the path, eg:

 $ export CGO_CPPFLAGS="-I/usr/include/x86_64-linux-gnu/qt5/QtCore/5.11.3"

(you can also edit the CGO CPPFLAGS: line in bridge.go, but setting $CGO_CPPFLAGS seems a lot cleaner).

So I'd guess this would apply to any distro which packages the Qt private headers separately.
Not sure there's any easy out-of-the-box solution for this, except maybe adding a note to the README?