qtbase: Add OE clang specific mkspecs

We can not piggy back clang anymore on existing
OE mkspecs since starting 5.9 the configure is
asking compiler for include paths and it needs to
know if platform is clang-linux or g++-linux

Fixes:
ERROR: failed to parse default search paths from compiler output

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

classes/qmake5_base.bbclass

@@ -1,6 +1,9 @@
 # hardcode linux, because that's what 0001-Add-linux-oe-g-platform.patch adds
-OE_QMAKE_PLATFORM_NATIVE = "linux-oe-g++"
-OE_QMAKE_PLATFORM = "linux-oe-g++"
+XPLATFORM_toolchain-clang = "linux-oe-clang"
+XPLATFORM ?= "linux-oe-g++"
+
+OE_QMAKE_PLATFORM_NATIVE = "${XPLATFORM}"
+OE_QMAKE_PLATFORM = "${XPLATFORM}"
 
 # Add -d to show debug output from every qmake call, but it prints *a lot*, better to add it only to debugged recipe
 OE_QMAKE_DEBUG_OUTPUT ?= ""

recipes-qt/qt5/qtbase-native_git.bb

@@ -38,10 +38,14 @@ SRC_URI += "\
 # 5.9.meta-qt5-native.2
 SRC_URI += " \
     file://0009-Always-build-uic.patch \
+    file://0010-Add-OE-specific-specs-for-clang-compiler.patch \
 "
 
 CLEANBROKEN = "1"
 
+XPLATFORM_toolchain-clang = "linux-oe-clang"
+XPLATFORM ?= "linux-oe-g++"
+
 PACKAGECONFIG_CONFARGS = " \
     -sysroot ${STAGING_DIR_NATIVE} \
     -no-gcc-sysroot \
@@ -79,7 +83,7 @@ PACKAGECONFIG_CONFARGS = " \
     -nomake examples \
     -nomake tests \
     -no-rpath \
-    -platform linux-oe-g++ \
+    -platform ${XPLATFORM} \
 "
 
 # for qtbase configuration we need default settings

recipes-qt/qt5/qtbase/0010-Add-OE-specific-specs-for-clang-compiler.patch

@@ -0,0 +1,72 @@
+From 3a46fb7b47d19c5261e1590f8d70fe41443def64 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Sun, 3 Sep 2017 09:11:44 -0700
+Subject: [PATCH] Add OE specific specs for clang compiler
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ mkspecs/linux-oe-clang/qmake.conf      | 43 ++++++++++++++++++++++++++++++++++
+ mkspecs/linux-oe-clang/qplatformdefs.h |  1 +
+ 2 files changed, 44 insertions(+)
+ create mode 100644 mkspecs/linux-oe-clang/qmake.conf
+ create mode 100644 mkspecs/linux-oe-clang/qplatformdefs.h
+
+diff --git a/mkspecs/linux-oe-clang/qmake.conf b/mkspecs/linux-oe-clang/qmake.conf
+new file mode 100644
+index 0000000000..ffc9f051db
+--- /dev/null
++++ b/mkspecs/linux-oe-clang/qmake.conf
+@@ -0,0 +1,43 @@
++#
++# qmake configuration for linux-g++ with modifications for building with OpenEmbedded
++#
++
++MAKEFILE_GENERATOR = UNIX
++CONFIG += incremental
++QMAKE_INCREMENTAL_STYLE = sublib
++
++include(../common/linux.conf)
++
++# QMAKE_<TOOL> (moc, uic, rcc) are gone, overwrite only ar and strip
++QMAKE_AR              = $$(OE_QMAKE_AR) cqs
++QMAKE_STRIP           = $$(OE_QMAKE_STRIP)
++QMAKE_WAYLAND_SCANNER = $$(OE_QMAKE_WAYLAND_SCANNER)
++
++include(../common/gcc-base-unix.conf)
++
++# *FLAGS from gcc-base.conf
++QMAKE_CFLAGS                += $$(OE_QMAKE_CFLAGS)
++QMAKE_CXXFLAGS              += $$(OE_QMAKE_CXXFLAGS)
++QMAKE_LFLAGS                += $$(OE_QMAKE_LDFLAGS)
++
++include(../common/clang.conf)
++
++# tc settings from g++-base.conf
++QMAKE_COMPILER = $$(OE_QMAKE_COMPILER) clang
++QMAKE_CC       = $$(OE_QMAKE_CC)
++QMAKE_CXX      = $$(OE_QMAKE_CXX)
++
++QMAKE_CFLAGS_RELEASE_WITH_DEBUGINFO += $$(OE_QMAKE_CFLAGS)
++
++QMAKE_LINK         = $$(OE_QMAKE_LINK)
++QMAKE_LINK_SHLIB   = $$(OE_QMAKE_LINK)
++QMAKE_LINK_C       = $$(OE_QMAKE_LINK)
++QMAKE_LINK_C_SHLIB = $$(OE_QMAKE_LINK)
++
++# for the SDK
++isEmpty(QMAKE_QT_CONFIG):QMAKE_QT_CONFIG = $$(OE_QMAKE_QT_CONFIG)
++
++include(../oe-device-extra.pri)
++
++load(device_config)
++load(qt_config)
+diff --git a/mkspecs/linux-oe-clang/qplatformdefs.h b/mkspecs/linux-oe-clang/qplatformdefs.h
+new file mode 100644
+index 0000000000..880c927b21
+--- /dev/null
++++ b/mkspecs/linux-oe-clang/qplatformdefs.h
+@@ -0,0 +1 @@
++#include "../linux-clang/qplatformdefs.h"
+-- 
+2.14.1
+

recipes-qt/qt5/qtbase_git.bb

@@ -26,6 +26,7 @@ SRC_URI += "\
     file://0006-Pretend-Qt5-wasn-t-found-if-OE_QMAKE_PATH_EXTERNAL_H.patch \
     file://0007-Delete-qlonglong-and-qulonglong.patch \
     file://0008-Replace-pthread_yield-with-sched_yield.patch \
+    file://0010-Add-OE-specific-specs-for-clang-compiler.patch \
     file://run-ptest \
 "
 
@@ -160,6 +161,9 @@ QT_CONFIG_FLAGS += " \
 # since we cannot set empty set filename to a not existent file
 deltask generate_qt_config_file
 
+XPLATFORM_toolchain-clang = "linux-oe-clang"
+XPLATFORM ?= "linux-oe-g++"
+
 do_configure() {
     # Avoid qmake error "Cannot read [...]/usr/lib/qt5/mkspecs/oe-device-extra.pri: No such file or directory" during configuration
     touch ${S}/mkspecs/oe-device-extra.pri
@@ -188,7 +192,7 @@ do_configure() {
         -external-hostbindir ${OE_QMAKE_PATH_EXTERNAL_HOST_BINS} \
         -hostdatadir ${OE_QMAKE_PATH_HOST_DATA} \
         -platform ${OE_QMAKE_PLATFORM_NATIVE} \
-        -xplatform linux-oe-g++ \
+        -xplatform ${XPLATFORM} \
         ${QT_CONFIG_FLAGS}
 }