--- avogadro-1.2.0/libavogadro/src/extensions/symmetry/libmsym/CMakeLists.txt.orig	2020-05-16 15:58:24.829000000 +0200
+++ avogadro-1.2.0/libavogadro/src/extensions/symmetry/libmsym/CMakeLists.txt	2020-05-16 15:59:08.768000000 +0200
@@ -28,6 +28,7 @@
 
 file (GLOB source src/*.c)
 add_library (msym ${source})
+target_link_libraries(msym m)
 if (BUILD_SHARED_LIBS)
         set_target_properties (msym PROPERTIES
                 POSITION_INDEPENDENT_CODE "TRUE")