[Fix Perlmint#39] Fix CMP0048 issue

CMakeLists.txt

@@ -1,5 +1,22 @@
 cmake_minimum_required(VERSION 2.8.12)
-project("glew")
+
+file(STRINGS ${CMAKE_CURRENT_SOURCE_DIR}/config/version  _VERSION_MAJOR_STRING REGEX "GLEW_MAJOR[ ]*=[ ]*[0-9]+.*")
+string(REGEX REPLACE "GLEW_MAJOR[ ]*=[ ]*([0-9]+)" "\\1" MAJOR_VERSION ${_VERSION_MAJOR_STRING})
+file(STRINGS ${CMAKE_CURRENT_SOURCE_DIR}/config/version  _VERSION_MINOR_STRING REGEX "GLEW_MINOR[ ]*=[ ]*[0-9]+.*")
+string(REGEX REPLACE "GLEW_MINOR[ ]*=[ ]*([0-9]+)" "\\1" MINOR_VERSION ${_VERSION_MINOR_STRING})
+file(STRINGS ${CMAKE_CURRENT_SOURCE_DIR}/config/version  _VERSION_PATCH_STRING REGEX "GLEW_MICRO[ ]*=[ ]*[0-9]+.*")
+string(REGEX REPLACE "GLEW_MICRO[ ]*=[ ]*([0-9]+)" "\\1" PATCH_VERSION ${_VERSION_PATCH_STRING})
+set(GLEW_VERSION ${MAJOR_VERSION}.${MINOR_VERSION}.${PATCH_VERSION})
+
+if(NOT CMAKE_VERSION VERSION_LESS 3.0)
+	cmake_policy(SET CMP0048 NEW)
+	project("glew" VERSION ${GLEW_VERSION} LANGUAGES C)
+else()
+	project("glew" C)
+	set(CPACK_PACKAGE_VERSION_MAJOR ${MAJOR_VERSION})
+	set(CPACK_PACKAGE_VERSION_MINOR ${MAJOR_VERSION})
+	set(CPACK_PACKAGE_VERSION_PATCH ${MAJOR_VERSION})
+endif()
 
 set(SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR}/src)
 set(INCLUDE_DIR "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>$<INSTALL_INTERFACE:include>")
@@ -17,14 +34,6 @@ option(USE_GLU "Use GLU" OFF)
 option(PKG_CONFIG_REPRESENTATIVE_TARGET "Generate pc file for specified target as glew. libglew_static|libglew_shared" OFF)
 option(ONLY_LIBS "Do not build executables" OFF)
 
-file(STRINGS ${CMAKE_CURRENT_SOURCE_DIR}/config/version  _VERSION_MAJOR_STRING REGEX "GLEW_MAJOR[ ]*=[ ]*[0-9]+.*")
-string(REGEX REPLACE "GLEW_MAJOR[ ]*=[ ]*([0-9]+)" "\\1" CPACK_PACKAGE_VERSION_MAJOR ${_VERSION_MAJOR_STRING})
-file(STRINGS ${CMAKE_CURRENT_SOURCE_DIR}/config/version  _VERSION_MINOR_STRING REGEX "GLEW_MINOR[ ]*=[ ]*[0-9]+.*")
-string(REGEX REPLACE "GLEW_MINOR[ ]*=[ ]*([0-9]+)" "\\1" CPACK_PACKAGE_VERSION_MINOR ${_VERSION_MINOR_STRING})
-file(STRINGS ${CMAKE_CURRENT_SOURCE_DIR}/config/version  _VERSION_PATCH_STRING REGEX "GLEW_MICRO[ ]*=[ ]*[0-9]+.*")
-string(REGEX REPLACE "GLEW_MICRO[ ]*=[ ]*([0-9]+)" "\\1" CPACK_PACKAGE_VERSION_PATCH ${_VERSION_PATCH_STRING})
-set(GLEW_VERSION ${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}.${CPACK_PACKAGE_VERSION_PATCH})
-
 set(LIBGLEW_SRCS ${SRC_DIR}/glew.c)
 
 set(DEFINITIONS)
@@ -37,7 +46,7 @@ if(MSVC)
 endif()
 
 # Use namespaced libraries when supported
-if(${CMAKE_VERSION} VERSION_GREATER 3.14)
+if(NOT CMAKE_VERSION VERSION_LESS 3.14)
 	set(USE_NAMESPACED_LIB YES)
 else()
 	set(USE_NAMESPACED_LIB NO)