--- a/INCHI_API/gcc_so_makefile/makefile
+++ b/INCHI_API/gcc_so_makefile/makefile
@@ -213,9 +213,11 @@ $(INCHI_LIB_PATHNAME).so$(VERSION): $(INCHI_LIB_OBJS)
 	$(SHARED_LINK) $(SHARED_LINK_PARM) -o \
   $(INCHI_LIB_PATHNAME).so$(VERSION) \
   $(INCHI_LIB_OBJS) \
-  -Wl$(LINUX_MAP)$(LINUX_Z_RELRO),-soname,$(INCHI_LIB_NAME).so$(MAIN_VERSION)
+  -Wl$(LINUX_MAP)$(LINUX_Z_RELRO),-soname,$(INCHI_LIB_NAME).so$(MAIN_VERSION) -lm
 	ln -fs $(INCHI_LIB_NAME).so$(VERSION) \
   $(INCHI_LIB_PATHNAME).so$(MAIN_VERSION)
+	ln -fs $(INCHI_LIB_NAME).so$(VERSION) \
+  $(INCHI_LIB_PATHNAME).so
 
 endif