sync: from linuxdeepin/dtkgui

Synchronize source files from linuxdeepin/dtkgui.

Source-pull-request: linuxdeepin/dtkgui#328

Author: deepin-ci-robot

.syncexclude

@@ -10,3 +10,4 @@
 linglong.yaml
 conanfile.py
 VERSION
+CHANGELOG.md

dtkgui.cmake

@@ -43,7 +43,6 @@ set(CONFIG_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}/cmake/Dtk${DTK_VERSION_MAJOR}Gui
 set(PKGCONFIG_INSTALL_DIR "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -Wall -Wextra -fopenmp")
-set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--as-needed")
 set(CMAKE_EXE_LINKER_FLAGS  "${CMAKE_EXE_LINKER_FLAGS} -pie")
 if (CMAKE_BUILD_TYPE STREQUAL "Debug")
     set(BUILD_TESTING ON)