Bump cmake version to 3.1 and set C_STANDARD to 90

Author: rapperskull

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.1)
 project(extract-xiso)
 
 string(TOUPPER __${CMAKE_SYSTEM_NAME}__ TARGET_OS)
@@ -9,4 +9,5 @@ set(SOURCE_FILES
 
 add_executable(extract-xiso ${SOURCE_FILES})
 target_compile_definitions(extract-xiso PRIVATE ${TARGET_OS})
+set_property(TARGET extract-xiso PROPERTY C_STANDARD 90)
 install(TARGETS extract-xiso RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}/bin")