Add cross compilation support to cmake builds

Add arm cross-compile basic support. CMake does not
support host builds. However we do host build with gn and
changing that would require an extra effort to keep all necessary
changes with Chromium upstream. Therefore let gn to perform
the host build for required tools and just feed gn with all the
build data.

Add new build steps:

* install gn into QT_HOST_PATH/libexec.
* run hostBuild project to get native architecture and compiler
* call PkgConfigHost to pass pkg-config paths to gn
* create wrapper script for host pkg-config to escape
  yocto shell pkg config exports

This change also splits gn toolchain into 3 toolchains host,target,v8
Now hostBuild provides host and v8 toolchain in case of cross compile.

The build optimizations will follow in another patch.

Fix not existing 'boot2qt' condition and enables more test on QEMU.

Note this is tested only with yocto based images.

Task-number: QTBUG-91760
Change-Id: Ic2bea12229acc71fbd36a848e9ed4fed7e14b485
(cherry picked from commit 3a962d8a2d3b70639a195fe5fd442f6c653bbe8f)
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

4 files changed, 12 insertions, 17 deletions

diff --git a/tests/auto/core/CMakeLists.txt b/tests/auto/core/CMakeLists.txt
index 0d2340188..ecb3b2cf9 100644
--- a/tests/auto/core/CMakeLists.txt
+++ b/tests/auto/core/CMakeLists.txt
@@ -2,9 +2,8 @@ add_subdirectory(qwebenginecookiestore)
 add_subdirectory(qwebenginesettings)
 add_subdirectory(qwebengineurlrequestinterceptor)
 add_subdirectory(origins)
-if(NOT boot2qt)
-    add_subdirectory(devtools)
-endif()
+add_subdirectory(devtools)
+
 if(QT_FEATURE_ssl)
     add_subdirectory(qwebengineclientcertificatestore)
     add_subdirectory(certificateerror)
diff --git a/tests/auto/quick/CMakeLists.txt b/tests/auto/quick/CMakeLists.txt
index 06b4bf6c2..6349e9335 100644
--- a/tests/auto/quick/CMakeLists.txt
+++ b/tests/auto/quick/CMakeLists.txt
@@ -3,11 +3,9 @@ add_subdirectory(publicapi)
 add_subdirectory(qquickwebenginedefaultsurfaceformat)
 add_subdirectory(qtbug-70248)
 add_subdirectory(uidelegates)
-if(NOT boot2qt)
-    add_subdirectory(inspectorserver)
-    add_subdirectory(qmltests)
-    add_subdirectory(qquickwebengineview)
-endif()
+add_subdirectory(inspectorserver)
+add_subdirectory(qmltests)
+add_subdirectory(qquickwebengineview)
 if(QT_FEATURE_webenginequick_testsupport)
     add_subdirectory(qquickwebengineviewgraphics)
 endif()
diff --git a/tests/auto/widgets/CMakeLists.txt b/tests/auto/widgets/CMakeLists.txt
index f3e3edc90..bedb00f53 100644
--- a/tests/auto/widgets/CMakeLists.txt
+++ b/tests/auto/widgets/CMakeLists.txt
@@ -1,9 +1,7 @@
-if(NOT boot2qt)
-    add_subdirectory(defaultsurfaceformat)
-    add_subdirectory(qwebenginepage)
-    add_subdirectory(qwebengineprofile)
-    add_subdirectory(qwebengineview)
-endif()
+add_subdirectory(defaultsurfaceformat)
+add_subdirectory(qwebenginepage)
+add_subdirectory(qwebengineprofile)
+add_subdirectory(qwebengineview)
 add_subdirectory(favicon)
 add_subdirectory(loadsignals)
 add_subdirectory(proxy)
@@ -19,7 +17,7 @@ endif()
 if(NOT MACOS)
     add_subdirectory(touchinput)
 endif()
-if(QT_FEATURE_accessibility AND NOT boot2qt)
+if(QT_FEATURE_accessibility)
     add_subdirectory(accessibility)
 endif()
 if(QT_FEATURE_webengine_printing_and_pdf)
diff --git a/tests/auto/widgets/proxypac/CMakeLists.txt b/tests/auto/widgets/proxypac/CMakeLists.txt
index 084e55f81..1dd2c8bec 100644
--- a/tests/auto/widgets/proxypac/CMakeLists.txt
+++ b/tests/auto/widgets/proxypac/CMakeLists.txt
@@ -11,7 +11,7 @@ qt_internal_add_test(tst_proxypac_file
 if(WIN32)
     get_filename_component(SOURCE_DIR "${CMAKE_CURRENT_LIST_DIR}" REALPATH)
     set(fileEnvArg "--proxy-pac-url=\"file:///${SOURCE_DIR}/proxy.pac\"")
-elseif(boot2qt)
+elseif(LINUX AND CMAKE_CROSSCOMPILING)
     set(fileEnvArg "--single-process --no-sandbox --proxy-pac-url=\"file://${CMAKE_CURRENT_LIST_DIR}/proxy.pac\"")
 else()
     set(fileEnvArg "--proxy-pac-url=\"file://${CMAKE_CURRENT_LIST_DIR}/proxy.pac\"")
@@ -29,7 +29,7 @@ qt_internal_add_test(tst_proxypac_qrc
         Test::HttpServer
 )
 
-if(boot2qt)
+if(LINUX AND CMAKE_CROSSCOMPILING)
     set(qrcEnvArg "--single-process --no-sandbox --proxy-pac-url=\"qrc:///proxy.pac\"")
 else()
     set(qrcEnvArg "--proxy-pac-url=\"qrc:///proxy.pac\"")