Appended m4 as buil requirement

bison/bison.spec

@@ -33,7 +33,7 @@ Distribution: OpenPKG [CORE]
 Group:        Language
 License:      GPL
 Version:      1.50
-Release:      20021006
+Release:      20021008
 
 #   list of sources
 Source0:      ftp://ftp.gnu.org/gnu/bison/bison-%{version}.tar.gz
@@ -42,7 +42,7 @@ Patch0:       bison.patch
 #   build information
 Prefix:       %{l_prefix}
 BuildRoot:    %{l_buildroot}
-BuildPreReq:  OpenPKG, openpkg >= 20020206, make
+BuildPreReq:  OpenPKG, openpkg >= 20020206, make, m4
 PreReq:       OpenPKG, openpkg >= 20020206, m4
 AutoReq:      no
 AutoReqProv:  no