--- ./Makefile.orig	2006-03-18 23:15:44 +0300
+++ ./Makefile	2006-03-18 23:19:49 +0300
@@ -323,7 +323,7 @@
 #		cd shared; $(CC) -shared -Wl -soname libgsm.so.2 -o libgsm.so.2.0 *.o
 
 $(LIBGSMSO): shared $(GSM_SHOBJECTS)		
-		cd shared; ld -o ../lib/libgsm.so.1.0.10 -shared -soname libgsm.so.1 *.o
+		cd shared; ld -o ../$(LIB)/libgsm.so.1.0.10 -shared -soname libgsm.so.1 *.o -lm
 		strip --strip-unneeded $(LIBGSMSO).1.0.10