ENH: try to fix aix with native cxx and gcc

Modules/Platform/AIX.cmake

@@ -3,9 +3,19 @@ SET(CMAKE_SHARED_LIBRARY_SUFFIX ".so")          # .so
 SET(CMAKE_DL_LIBS "-lld")
 SET(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-G -Wl,-brtl")  # -shared
 SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "-Wl,-brtl,-bexpall")  # +s, flag for exe link to use shared lib
+
+# CXX Compiler
 IF(CMAKE_COMPILER_IS_GNUCXX) 
   SET(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS "-shared -Wl,-G")       # -shared
+ELSE(CMAKE_COMPILER_IS_GNUCXX) 
+  SET(CMAKE_SHARED_LIBRARY_CXX_FLAGS "")
+  SET(CMAKE_SHARED_MODULE_CXX_FLAGS  "")
 ENDIF(CMAKE_COMPILER_IS_GNUCXX) 
+
+# C Compiler
 IF(CMAKE_COMPILER_IS_GNUCC)
   SET(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-shared -Wl,-G")       # -shared
+ELSE(CMAKE_COMPILER_IS_GNUCC)
+  SET(CMAKE_SHARED_LIBRARY_C_FLAGS "")
+  SET(CMAKE_SHARED_MODULE_C_FLAGS  "")
 ENDIF(CMAKE_COMPILER_IS_GNUCC)