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, 9 insertions, 0 deletions

diff --git a/recipes-qt/qt5/qt5.inc b/recipes-qt/qt5/qt5.inc
index b3ab2103..0bfe1ad4 100644
--- a/recipes-qt/qt5/qt5.inc
+++ b/recipes-qt/qt5/qt5.inc
@@ -55,12 +55,21 @@ QT_CONFIG_FLAGS += " \
     ${QT_DEMOS} \
 "
 
+SEPB = "${WORKDIR}/build"
+B = "${SEPB}"
+
 do_configure() {
     set_arch
     set_endian
 
     # Avoid problems with the linkers, since we want the linker to be g++
     unset LD
+
+    # Similar logic is in autotools.bbclass
+    if [ -d ${B} -a "${S}" != "${B}" ] ; then
+        # Existing separate build directory, exists, remove
+        rm -rf "${B}/*"
+    fi
 }
 
 do_compile() {