sync: from linuxdeepin/dtkwidget

Synchronize source files from linuxdeepin/dtkwidget.

Source-pull-request: linuxdeepin/dtkwidget#669

Author: deepin-ci-robot

.syncexclude

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

dtkwidget.cmake

@@ -89,8 +89,7 @@ if (NOT CMAKE_BUILD_TYPE)
 endif()
 
 if(NOT MSVC)
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -Wall -Wextra")
-  set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--as-needed")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -Wextra")
   set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--as-needed -pie")
   if (CMAKE_BUILD_TYPE STREQUAL "Debug")
     set(BUILD_TESTING ON)