+if (SYSTEM_EXPAT)
+ message(STATUS "Requested to use system Expat library, forcing SIMGEAR_SHARED to true")
+ set(SIMGEAR_SHARED ON)
+ find_package(EXPAT REQUIRED)
+ include_directories(${EXPAT_INCLUDE_DIRS})
+else()
+ message(STATUS "Using built-in expat code")
+ add_definitions(-DHAVE_EXPAT_CONFIG_H)
+endif(SYSTEM_EXPAT)
+
+check_include_file(inttypes.h HAVE_INTTYPES_H)