Add gn build of qtwebengine for linux

This commit uses gn instead of gyp to build on desktop
linux.

Use WEBENGINE_CONFIG+=use_gn to use gn during the build
instead of gyp.

Change-Id: Ifd3d8d0835b47c323a8d39c320eb55e5e1024dee
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

1 files changed, 65 insertions, 48 deletions

diff --git a/src/core/core_module.pro b/src/core/core_module.pro
index 596993457..fc1c32786 100644
--- a/src/core/core_module.pro
+++ b/src/core/core_module.pro
@@ -4,9 +4,11 @@ include(core_common.pri)
 # Needed to set a CFBundleIdentifier
 QMAKE_INFO_PLIST = Info_mac.plist
 
-# Look for linking information produced by gyp for our target according to core_generated.gyp
-!include($$OUT_PWD/$$getConfigDir()/$${TARGET}_linking.pri) {
-    error("Could not find the linking information that gyp should have generated.")
+use?(gn): linking_pri = $$OUT_PWD/$$getConfigDir()/$${TARGET}.pri
+else: linking_pri = $$OUT_PWD/$$getConfigDir()/$${TARGET}_linking.pri
+
+!include($$linking_pri) {
+    error("Could not find the linking information that gyp/gn should have generated.")
 }
 
 load(qt_module)
@@ -17,6 +19,18 @@ api_library_path = $$OUT_PWD/api/$$getConfigDir()
 # Do not precompile any headers. We are only interested in the linker step.
 PRECOMPILED_HEADER =
 
+use?(gn){
+    isEmpty(NINJA_OBJECTS): error("Missing object files from QtWebEngineCore linking pri.")
+    isEmpty(NINJA_LFLAGS): error("Missing linker flags from QtWebEngineCore linking pri")
+    isEmpty(NINJA_ARCHIVES): error("Missing archive files from QtWebEngineCore linking pri")
+    isEmpty(NINJA_LIBS): error("Missing library files from QtWebEngineCore linking pri")
+    OBJECTS = $$NINJA_OBJECTS
+    linux: LIBS_PRIVATE = -Wl,-whole-archive $$NINJA_ARCHIVES -Wl,-no-whole-archive
+    LIBS_PRIVATE += $$NINJA_LIB_DIRS $$NINJA_LIBS
+    QMAKE_LFLAGS += $$NINJA_LFLAGS
+    POST_TARGETDEPS += $$NINJA_TARGETDEPS
+}
+
 LIBS_PRIVATE += -L$$api_library_path
 CONFIG *= no_smart_library_merge
 osx {
@@ -44,55 +58,58 @@ qtConfig(egl): CONFIG += egl
 
 linux:qtConfig(separate_debug_info): QMAKE_POST_LINK="cd $(DESTDIR) && $(STRIP) --strip-unneeded $(TARGET)"
 
-REPACK_DIR = $$OUT_PWD/$$getConfigDir()/gen/repack
-# Duplicated from resources/resources.gyp
-LOCALE_LIST = am ar bg bn ca cs da de el en-GB en-US es-419 es et fa fi fil fr gu he hi hr hu id it ja kn ko lt lv ml mr ms nb nl pl pt-BR pt-PT ro ru sk sl sr sv sw ta te th tr uk vi zh-CN zh-TW
-for(LOC, LOCALE_LIST) {
-    locales.files += $$REPACK_DIR/qtwebengine_locales/$${LOC}.pak
-}
-resources.files = $$REPACK_DIR/qtwebengine_resources.pak \
-    $$REPACK_DIR/qtwebengine_resources_100p.pak \
-    $$REPACK_DIR/qtwebengine_resources_200p.pak \
-    $$REPACK_DIR/qtwebengine_devtools_resources.pak
-
-icu.files = $$OUT_PWD/$$getConfigDir()/icudtl.dat
-
-!debug_and_release|!build_all|CONFIG(release, debug|release) {
-    qtConfig(framework) {
-        locales.version = Versions
-        locales.path = Resources/qtwebengine_locales
-        resources.version = Versions
-        resources.path = Resources
-        icu.version = Versions
-        icu.path = Resources
-        # No files, this prepares the bundle Helpers symlink, process.pro will create the directories
-        qtwebengineprocessplaceholder.version = Versions
-        qtwebengineprocessplaceholder.path = Helpers
-        QMAKE_BUNDLE_DATA += icu locales resources qtwebengineprocessplaceholder
-    } else {
-        locales.CONFIG += no_check_exist
-        locales.path = $$[QT_INSTALL_TRANSLATIONS]/qtwebengine_locales
-        resources.CONFIG += no_check_exist
-        resources.path = $$[QT_INSTALL_DATA]/resources
-        INSTALLS += locales resources
-
-        !use?(system_icu) {
-            icu.CONFIG += no_check_exist
-            icu.path = $$[QT_INSTALL_DATA]/resources
-            INSTALLS += icu
-        }
+!use?(gn) {
+
+    REPACK_DIR = $$OUT_PWD/$$getConfigDir()/gen/repack
+    # Duplicated from resources/resources.gyp
+    LOCALE_LIST = am ar bg bn ca cs da de el en-GB en-US es-419 es et fa fi fil fr gu he hi hr hu id it ja kn ko lt lv ml mr ms nb nl pl pt-BR pt-PT ro ru sk sl sr sv sw ta te th tr uk vi zh-CN zh-TW
+    for(LOC, LOCALE_LIST) {
+        locales.files += $$REPACK_DIR/qtwebengine_locales/$${LOC}.pak
     }
+    resources.files = $$REPACK_DIR/qtwebengine_resources.pak \
+        $$REPACK_DIR/qtwebengine_resources_100p.pak \
+        $$REPACK_DIR/qtwebengine_resources_200p.pak \
+        $$REPACK_DIR/qtwebengine_devtools_resources.pak
+
+    icu.files = $$OUT_PWD/$$getConfigDir()/icudtl.dat
+
+    !debug_and_release|!build_all|CONFIG(release, debug|release) {
+        qtConfig(framework) {
+            locales.version = Versions
+            locales.path = Resources/qtwebengine_locales
+            resources.version = Versions
+            resources.path = Resources
+            icu.version = Versions
+            icu.path = Resources
+            # No files, this prepares the bundle Helpers symlink, process.pro will create the directories
+            qtwebengineprocessplaceholder.version = Versions
+            qtwebengineprocessplaceholder.path = Helpers
+            QMAKE_BUNDLE_DATA += icu locales resources qtwebengineprocessplaceholder
+        } else {
+            locales.CONFIG += no_check_exist
+            locales.path = $$[QT_INSTALL_TRANSLATIONS]/qtwebengine_locales
+            resources.CONFIG += no_check_exist
+            resources.path = $$[QT_INSTALL_DATA]/resources
+            INSTALLS += locales resources
+
+            !use?(system_icu) {
+                icu.CONFIG += no_check_exist
+                icu.path = $$[QT_INSTALL_DATA]/resources
+                INSTALLS += icu
+            }
+        }
 
-    !qtConfig(framework):!force_independent {
-        #
-        # Copy essential files to the qtbase build directory for non-prefix builds
-        #
+        !qtConfig(framework):!force_independent {
+            #
+            # Copy essential files to the qtbase build directory for non-prefix builds
+            #
 
-        !use?(system_icu) {
-            COPIES += icu
-        }
+            !use?(system_icu) {
+                COPIES += icu
+            }
 
-        COPIES += resources locales
+            COPIES += resources locales
+        }
     }
 }