Compute private Qt header paths with preprocessor.

Updates #39.

Author: niemeyer

README.md

@@ -87,8 +87,6 @@ Something along these lines should be effective:
 
     $ export PKG_CONFIG_PATH=`brew --prefix qt5`/lib/pkgconfig
     $ QT5VERSION=`pkg-config --modversion Qt5Core`
-    $ # For "private/qmetaobject_p.h" inclusion
-    $ export CGO_CPPFLAGS=-I`brew --prefix qt5`/include/QtCore/$QT5VERSION/QtCore
     $ CXX=g++-4.8 go get gopkg.in/qml.v0
 
 For Mac OS X Mavericks you may need to use `brew install qt5 --HEAD` and check that QT5VERSION
@@ -106,7 +104,7 @@ On Windows you'll need the following:
 
 Then, assuming Qt was installed under `C:\Qt5.1.1\`, set up the following environment variables in the respective configuration:
 
-    CPATH += C:\Qt5.1.1\5.1.1\mingw48_32\include;C:\Qt5.1.1\5.1.1\mingw48_32\include\QtCore\5.1.1\QtCore
+    CPATH += C:\Qt5.1.1\5.1.1\mingw48_32\include
     LIBRARY_PATH += C:\Qt5.1.1\5.1.1\mingw48_32\lib
     PATH += C:\Qt5.1.1\5.1.1\mingw48_32\bin
 

bridge.go

@@ -1,14 +1,6 @@
 package qml
 
 // #cgo CPPFLAGS: -I./cpp
-// #cgo CPPFLAGS: -I/usr/include/qt5/QtCore/5.0.1/QtCore
-// #cgo CPPFLAGS: -I/usr/include/qt5/QtCore/5.0.2/QtCore
-// #cgo CPPFLAGS: -I/usr/include/qt5/QtCore/5.1.1/QtCore
-// #cgo CPPFLAGS: -I/usr/include/qt5/QtCore/5.2.0/QtCore
-// #cgo CPPFLAGS: -I/usr/include/qt5/QtCore/5.2.1/QtCore
-// #cgo CPPFLAGS: -I/usr/include/qt/QtCore/5.1.1/QtCore
-// #cgo CPPFLAGS: -I/usr/include/qt/QtCore/5.2.0/QtCore
-// #cgo CPPFLAGS: -I/usr/include/qt/QtCore/5.2.1/QtCore
 // #cgo CXXFLAGS: -std=c++0x -pedantic-errors -Wall -fno-strict-aliasing
 // #cgo LDFLAGS: -lstdc++
 // #cgo pkg-config: Qt5Core Qt5Widgets Qt5Quick

cpp/private/qmetaobject_p.h

@@ -0,0 +1,2 @@
+#include "private/qtheader.h"
+#include QT_PRIVATE_HEADER(QtCore,qmetaobject_p.h)

cpp/private/qmetaobjectbuilder_p.h

@@ -0,0 +1,2 @@
+#include "private/qtheader.h"
+#include QT_PRIVATE_HEADER(QtCore,qmetaobjectbuilder_p.h)

cpp/private/qobject_p.h

@@ -0,0 +1,2 @@
+#include "private/qtheader.h"
+#include QT_PRIVATE_HEADER(QtCore,qobject_p.h)

cpp/private/qtheader.h

@@ -0,0 +1,70 @@
+#ifndef QTPRIVATE_H
+#define QTPRIVATE_H
+
+#include <QtCore/qglobal.h>
+
+#define QT_MAJOR_ (QT_VERSION>>16)
+#define QT_MINOR_ (QT_VERSION>>8&0xFF)
+#define QT_MICRO_ (QT_VERSION&0xFF)
+
+#if QT_MAJOR_ == 5
+#define QT_MAJOR 5
+#else 
+#error Unupported Qt major version. Please report.
+#endif
+
+#if QT_MINOR_ == 0
+#define QT_MINOR 0
+#elif QT_MINOR_ == 1
+#define QT_MINOR 1
+#elif QT_MINOR_ == 2
+#define QT_MINOR 2
+#elif QT_MINOR_ == 3
+#define QT_MINOR 3
+#elif QT_MINOR_ == 4
+#define QT_MINOR 4
+#elif QT_MINOR_ == 5
+#define QT_MINOR 5
+#elif QT_MINOR_ == 6
+#define QT_MINOR 6
+#elif QT_MINOR_ == 7
+#define QT_MINOR 7
+#elif QT_MINOR_ == 8
+#define QT_MINOR 8
+#elif QT_MINOR_ == 9
+#define QT_MINOR 9
+#elif QT_MINOR_ == 10
+#define QT_MINOR 10
+#else 
+#error Unupported Qt minor version. Please report.
+#endif
+
+#if QT_MICRO_ == 0
+#define QT_MICRO 0
+#elif QT_MICRO_ == 1
+#define QT_MICRO 1
+#elif QT_MICRO_ == 2
+#define QT_MICRO 2
+#elif QT_MICRO_ == 3
+#define QT_MICRO 3
+#elif QT_MICRO_ == 4
+#define QT_MICRO 4
+#elif QT_MICRO_ == 5
+#define QT_MICRO 5
+#elif QT_MICRO_ == 6
+#define QT_MICRO 6
+#elif QT_MICRO_ == 7
+#define QT_MICRO 7
+#elif QT_MICRO_ == 8
+#define QT_MICRO 8
+#elif QT_MICRO_ == 9
+#define QT_MICRO 9
+#elif QT_MICRO_ == 10
+#define QT_MICRO 10
+#else 
+#error Unupported Qt micro version. Please report.
+#endif
+
+#define QT_PRIVATE_HEADER(dir,file) <dir/QT_MAJOR.QT_MINOR.QT_MICRO/dir/private/file>
+
+#endif // QTPRIVATE_H