When the host is Ubuntu 14.04, qtwebengine build will fail. This problem is because the build of qtwebengine does not use native-gcc, but uses host-gcc.
*The gcc version of Ubuntu 14.04 is 4.8.x.
FAILED: protoc
g++ -Wl,-O1 Wl,-hash-style=gnu Wl,-as-needed -fstack-protector-strong -Wl,-z,relro,-z,now -Wl,-z,now -Wl,-z,relro -Wl,-z,defs -pthread -Wl,-z,noexecstack -fPIC Wl,-disable-new-dtags -Wl,-O1 Wl,-as-needed Wl,-gc-sections Wl,-no-as-needed -lpthread Wl,-as-needed -o protoc Wl,-start-group obj.host/src/3rdparty/chromium/third_party/protobuf/src/google/protobuf/compiler/protoc.main.o obj.host/src/3rdparty/chromium/third_party/protobuf/libprotoc_lib.a obj.host/src/3rdparty/chromium/third_party/protobuf/libprotobuf_full_do_not_use.a Wl,-end-group
g++: error: unrecognized command line option ‘-fstack-protector-strong’
Minor
When the host is Ubuntu 14.04, qtwebengine build will fail. This problem is because the build of qtwebengine does not use native-gcc, but uses host-gcc.
*The gcc version of Ubuntu 14.04 is 4.8.x.
FAILED: protoc
g++ -Wl,-O1 Wl,-hash-style=gnu Wl,-as-needed -fstack-protector-strong -Wl,-z,relro,-z,now -Wl,-z,now -Wl,-z,relro -Wl,-z,defs -pthread -Wl,-z,noexecstack -fPIC Wl,-disable-new-dtags -Wl,-O1 Wl,-as-needed Wl,-gc-sections Wl,-no-as-needed -lpthread Wl,-as-needed -o protoc Wl,-start-group obj.host/src/3rdparty/chromium/third_party/protobuf/src/google/protobuf/compiler/protoc.main.o obj.host/src/3rdparty/chromium/third_party/protobuf/libprotoc_lib.a obj.host/src/3rdparty/chromium/third_party/protobuf/libprotobuf_full_do_not_use.a Wl,-end-group
g++: error: unrecognized command line option ‘-fstack-protector-strong’