diff -rupN gl2ps-1.3.8/CMakeLists.txt gl2ps-1.3.8_new/CMakeLists.txt
--- gl2ps-1.3.8/CMakeLists.txt	2012-11-27 20:41:06.000000000 +0100
+++ gl2ps-1.3.8_new/CMakeLists.txt	2014-12-18 16:33:26.479069652 +0100
@@ -140,9 +140,9 @@ install(FILES ${CMAKE_SOURCE_DIR}/gl2psT
 
 if(GLUT_FOUND)
   add_executable(gl2psTest WIN32 gl2psTest.c)
-  target_link_libraries(gl2psTest lib ${EXTERNAL_LIBRARIES})
+  target_link_libraries(gl2psTest lib ${EXTERNAL_LIBRARIES} -lm)
   add_executable(gl2psTestSimple WIN32 gl2psTestSimple.c)
-  target_link_libraries(gl2psTestSimple lib ${EXTERNAL_LIBRARIES})
+  target_link_libraries(gl2psTestSimple lib ${EXTERNAL_LIBRARIES} -lm)
 endif(GLUT_FOUND)
 
 find_package(LATEX)