qtbase: improve internal build system to support OE way of building qt

* add linux-oe-g++ mkspec directly with patch
* add functions to read and eval OE_QMAKE functions from mkspec and
  also export them with QMakeVar to be available also for config.tests
* add external-host-bindir parameter to skip building native tools
  even when we're in fact cross-compiling (because we have them from
  qtbase-native build already).
* use separated ${B} and ${S} and clean ${B} when reconfiguring
  stalled qmake cache can be used when configure is reexecuted
  cleaning ${B} prevents that and provide cleaner separation
* OE_QMAKE_AR cqs is added by Makefile, having it here too was causing
  issues
* isEmpty(QT_EXTERNAL_HOST_BINS) doesn't work, so lets use exist()
  even when it allows to incorrectly set wrong directory and build
  native tools again (instead of skipping them)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/recipes-qt/qt5/qtbase/0006-qt_functions-temporary-remove-isEmpty-check.patch b/recipes-qt/qt5/qtbase/0006-qt_functions-temporary-remove-isEmpty-check.patch
new file mode 100644
index 00000000..d1cacd3e
--- /dev/null
+++ b/recipes-qt/qt5/qtbase/0006-qt_functions-temporary-remove-isEmpty-check.patch
@@ -0,0 +1,46 @@
+From 5856e25a0653313b8f80a5a92a7817fe8eb39dc8 Mon Sep 17 00:00:00 2001
+From: Martin Jansa <Martin.Jansa@gmail.com>
+Date: Wed, 17 Apr 2013 18:06:25 +0200
+Subject: [PATCH 6/6] qt_functions: temporary remove isEmpty check
+
+* now we assume that every build will provide QT_EXTERNAL_HOST_BINS value
+
+Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
+---
+ mkspecs/features/qt_functions.prf | 6 +++++-
+ mkspecs/features/qt_tool.prf      | 2 +-
+ 2 files changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/mkspecs/features/qt_functions.prf b/mkspecs/features/qt_functions.prf
+index e249960..105ba4c 100644
+--- a/mkspecs/features/qt_functions.prf
++++ b/mkspecs/features/qt_functions.prf
+@@ -195,7 +195,11 @@ defineTest(qtPrepareTool) {
+     $$1 = $$eval(QT_TOOL.$${2}.command)
+     isEmpty($$1) {
+         $$1 = $$[QT_EXTERNAL_HOST_BINS]/$$2
+-        isEmpty($$[QT_EXTERNAL_HOST_BINS]) {
++        # for some reason isEmpty does not work here, FIXME before submitting upstream
++        # DEBUG 1: mkspecs/features/qt_functions.prf:198: calling built-in isEmpty(/OE/oe-core/tmp-eglibc/sysroots/x86_64-linux/usr/bin/qt5)
++        # DEBUG 1: mkspecs/features/qt_functions.prf:198: test function returned true
++        # DEBUG 1: mkspecs/features/qt_functions.prf:198: taking 'then' branch
++        !exists($$[QT_EXTERNAL_HOST_BINS]/$$2) {
+             $$1 = $$[QT_HOST_BINS/get]/$$2
+         }
+         contains(QMAKE_HOST.os, Windows):!contains($$1, .*\\.(exe|bat)$) {
+diff --git a/mkspecs/features/qt_tool.prf b/mkspecs/features/qt_tool.prf
+index 5518933..b0e4f28 100644
+--- a/mkspecs/features/qt_tool.prf
++++ b/mkspecs/features/qt_tool.prf
+@@ -31,7 +31,7 @@ load(qt_targets)
+ 
+ # If we are doing a prefix build, create a "module" pri which enables
+ # qtPrepareTool() to work with the non-installed build.
+-!build_pass:!exists($$[QT_INSTALL_PREFIX]/.qmake.cache):isEmpty($$[QT_EXTERNAL_HOST_BINS]) {
++!build_pass:!exists($$[QT_INSTALL_PREFIX]/.qmake.cache):!exists($$[QT_EXTERNAL_HOST_BINS]) {
+ 
+     isEmpty(MODULE):MODULE = $$TARGET
+ 
+-- 
+1.8.2.1
+