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>

2 files changed, 91 insertions, 39 deletions

diff --git a/src/core/config/common.pri b/src/core/config/common.pri
index f822ab7cc..d13d9f8d9 100644
--- a/src/core/config/common.pri
+++ b/src/core/config/common.pri
@@ -1,33 +1,61 @@
 # Shared configuration for all our supported platforms
 
-# Trigger Qt-specific build conditions.
-GYP_CONFIG += use_qt=1
-# We do not want to ship more external binary blobs, so let v8 embed its startup data.
-GYP_CONFIG += v8_use_external_startup_data=0
-# WebSpeech requires Google API keys and adds dependencies on speex and flac.
-GYP_CONFIG += enable_web_speech=0
-# We do not use or even include the extensions
-GYP_CONFIG += enable_extensions=0
-
-sanitize_address: GYP_CONFIG += asan=1
-sanitize_thread: GYP_CONFIG += tsan=1
-sanitize_memory: GYP_CONFIG += msan=1
-sanitize_undefined: GYP_CONFIG += ubsan=1
-
-use?(printing) {
-    GYP_CONFIG += enable_basic_printing=1 enable_print_preview=1
-} else {
-    GYP_CONFIG += enable_basic_printing=0 enable_print_preview=0
-}
+use?(gn) {
 
-use?(pdf) {
-    GYP_CONFIG += enable_pdf=1
-} else {
-    GYP_CONFIG += enable_pdf=0
-}
+    use?(printing) {
+        gn_args += enable_basic_printing=true enable_print_preview=true
+    } else {
+        gn_args += enable_basic_printing=false enable_print_preview=false
+    }
+
+    use?(pdf) {
+        gn_args += enable_pdf=true
+    } else {
+        gn_args += enable_pdf=false
+    }
+
+    use?(pepper_plugins) {
+        gn_args += enable_plugins=true enable_widevine=true
+    } else {
+        gn_args += enable_plugins=false enable_widevine=false
+    }
+
+    use?(spellchecker) {
+        gn_args += enable_spellcheck=true
+    } else {
+        gn_args += enable_spellcheck=false
+    }
 
-use?(pepper_plugins) {
-    GYP_CONFIG += enable_plugins=1 enable_widevine=1
 } else {
-    GYP_CONFIG += enable_plugins=0 enable_widevine=0
+    # Trigger Qt-specific build conditions.
+    GYP_CONFIG += use_qt=1
+    # We do not want to ship more external binary blobs, so let v8 embed its startup data.
+    GYP_CONFIG += v8_use_external_startup_data=0
+    # WebSpeech requires Google API keys and adds dependencies on speex and flac.
+    GYP_CONFIG += enable_web_speech=0
+    # We do not use or even include the extensions
+    GYP_CONFIG += enable_extensions=0
+
+    sanitize_address: GYP_CONFIG += asan=1
+    sanitize_thread: GYP_CONFIG += tsan=1
+    sanitize_memory: GYP_CONFIG += msan=1
+    sanitize_undefined: GYP_CONFIG += ubsan=1
+
+    use?(printing) {
+        GYP_CONFIG += enable_basic_printing=1 enable_print_preview=1
+    } else {
+        GYP_CONFIG += enable_basic_printing=0 enable_print_preview=0
+    }
+
+    use?(pdf) {
+        GYP_CONFIG += enable_pdf=1
+    } else {
+        GYP_CONFIG += enable_pdf=0
+    }
+
+    use?(pepper_plugins) {
+        GYP_CONFIG += enable_plugins=1 enable_widevine=1
+    } else {
+        GYP_CONFIG += enable_plugins=0 enable_widevine=0
+    }
 }
diff --git a/src/core/config/desktop_linux.pri b/src/core/config/desktop_linux.pri
index 92491fc1c..f8bd42ce8 100644
--- a/src/core/config/desktop_linux.pri
+++ b/src/core/config/desktop_linux.pri
@@ -1,17 +1,41 @@
-GYP_ARGS += "-D qt_os=\"desktop_linux\""
 
-include(linux.pri)
+use?(gn) {
+    include(common.pri)
+    gn_args += \
+        use_qt=true \
+        is_clang=false \
+        use_sysroot=false \
+        enable_remoting=false \
+        enable_nacl=false \
+        use_kerberos=false \
+        is_component_build=false \
+        use_experimental_allocator_shim=false \
+        use_allocator=\"none\" \
+        v8_use_external_startup_data=false \
+        linux_use_bundled_binutils=false \
+        treat_warnings_as_errors=false
 
-GYP_CONFIG += \
-    desktop_linux=1
+    use?(icecc) {
+        gn_args += use_debug_fission=false
+    }
 
-clang {
-    GYP_CONFIG += werror=
-    clang_full_path = $$which($${QMAKE_CXX})
-    # Remove the "/bin/clang++" part.
-    clang_prefix = $$section(clang_full_path, /, 0, -3)
-    GYP_CONFIG += clang=1 host_clang=1 clang_use_chrome_plugins=0 make_clang_dir=$${clang_prefix}
-    linux-clang-libc++: GYP_CONFIG += use_system_libcxx=1
 } else {
-    GYP_CONFIG += clang=0 host_clang=0
+
+    GYP_ARGS += "-D qt_os=\"desktop_linux\""
+
+    include(linux.pri)
+
+    GYP_CONFIG += \
+        desktop_linux=1
+
+    clang {
+        GYP_CONFIG += werror=
+        clang_full_path = $$which($${QMAKE_CXX})
+        # Remove the "/bin/clang++" part.
+        clang_prefix = $$section(clang_full_path, /, 0, -3)
+        GYP_CONFIG += clang=1 host_clang=1 clang_use_chrome_plugins=0 make_clang_dir=$${clang_prefix}
+        linux-clang-libc++: GYP_CONFIG += use_system_libcxx=1
+    } else {
+        GYP_CONFIG += clang=0 host_clang=0
+    }
 }