Added -lm for linking

Makefile

@@ -5,7 +5,7 @@ PROJNAME = misc_c
 USRINCFLAGS = -I${INC_PROB}
 USRLDFLAGS = -L${LIB_PROB}
 
-LIBS = -lss_8UI -lprob
+LIBS = -lss_8UI -lprob -lm
 
 XFILES = freqtest gifmerge hist2prob morph_kernel ptoz runavw sphere tmpnam ztop
 
@@ -30,7 +30,7 @@ ztop: ztop.cc
 	$(CXX) $(CFLAGS) -o ztop ztop.cc $(LDFLAGS) -lprob -lm
 
 runavw: runavw.c
-	$(CC) $(CFLAGS) -o runavw runavw.c $(LDFLAGS) -lss_8UI
+	$(CC) $(CFLAGS) -o runavw runavw.c $(LDFLAGS) -lss_8UI -lm
 
 sphere: sphere.c
 	$(CC) $(CFLAGS) -o sphere sphere.c $(LDFLAGS) -lss_8UI -lm