Retain SWIG flags in CMake

fwk/_src/CMakeLists.txt

@@ -20,7 +20,7 @@ FILE(GLOB SRCS *.h *.cpp *.inl *.swg)
 FILE(GLOB ISRCS *.i)
 
 SET_SOURCE_FILES_PROPERTIES(${ISRCS} PROPERTIES CPLUSPLUS ON)
-SET(CMAKE_SWIG_FLAGS "-interface" "_fwkw") # avoids "import _module_d" with MSVC/Debug
+SET(CMAKE_SWIG_FLAGS ${CMAKE_SWIG_FLAGS} "-interface" "_fwkw") # avoids "import _module_d" with MSVC/Debug
 SWIG_ADD_LIBRARY(fwkw LANGUAGE python SOURCES ${ISRCS} ${SRCS})
 SET_PROPERTY(TARGET fwkw PROPERTY SWIG_USE_TARGET_INCLUDE_DIRECTORIES ON)
 MACRO_DebugPostfix(fwkw)

tbox/_src/CMakeLists.txt

@@ -20,7 +20,7 @@ FILE(GLOB SRCS *.h *.cpp *.inl *.swg)
 FILE(GLOB ISRCS *.i)
 
 SET_SOURCE_FILES_PROPERTIES(${ISRCS} PROPERTIES CPLUSPLUS ON)
-SET(CMAKE_SWIG_FLAGS "-interface" "_tboxw") # avoids "import _module_d" with MSVC/Debug
+SET(CMAKE_SWIG_FLAGS ${CMAKE_SWIG_FLAGS} "-interface" "_tboxw") # avoids "import _module_d" with MSVC/Debug
 SWIG_ADD_LIBRARY(tboxw LANGUAGE python SOURCES ${ISRCS} ${SRCS})
 SET_PROPERTY(TARGET tboxw PROPERTY SWIG_USE_TARGET_INCLUDE_DIRECTORIES ON)
 MACRO_DebugPostfix(tboxw)

tboxVtk/_src/CMakeLists.txt

@@ -20,7 +20,7 @@ FILE(GLOB SRCS *.h *.cpp *.inl *.swg)
 FILE(GLOB ISRCS *.i)
 
 SET_SOURCE_FILES_PROPERTIES(${ISRCS} PROPERTIES CPLUSPLUS ON)
-SET(CMAKE_SWIG_FLAGS "-interface" "_tboxVtkw") # avoids "import _module_d" with MSVC/Debug
+SET(CMAKE_SWIG_FLAGS ${CMAKE_SWIG_FLAGS} "-interface" "_tboxVtkw") # avoids "import _module_d" with MSVC/Debug
 SWIG_ADD_LIBRARY(tboxVtkw LANGUAGE python SOURCES ${ISRCS} ${SRCS})
 SET_PROPERTY(TARGET tboxVtkw PROPERTY SWIG_USE_TARGET_INCLUDE_DIRECTORIES ON)
 MACRO_DebugPostfix(tboxVtkw)