try to fix building under Linux

gocr/gocr.spec

@@ -34,7 +34,7 @@ Class:        PLUS
 Group:        Graphics
 License:      GPL
 Version:      0.39
-Release:      20040920
+Release:      20050218
 
 #   list of sources
 Source0:      http://osdn.dl.sourceforge.net/sourceforge/jocr/gocr-%{version}.tar.gz
@@ -70,6 +70,7 @@ AutoReqProv:  no
     CPPFLAGS="%{l_cppflags}" \
     LDFLAGS="%{l_ldflags}" \
     FIG2DEV="%{l_prefix}/bin/fig2dev" \
+    LIBS="-lm" \
     ./configure \
         --prefix=%{l_prefix} \
         --with-x \