Add an _os variable than can be used for conditionals in build.sh scripts

buildpkg.functions

@@ -58,6 +58,7 @@ CMP=/bin/cmp
 GREP=/bin/grep
 UNIQ=/bin/uniq
 BASENAME=/bin/basename
+TR=/bin/tr
 
 # Groff stuff for manpages
 NEQN=/usr/local/bin/neqn
@@ -91,6 +92,8 @@ _infodir=info
 
 tmpdir=/tmp
 
+_os=$($UNAME -sr|$SED -e 's/ //g' -e 's/\.//g'|$TR '[A-Z]' '[a-z]')
+
 # pkg information.
 # The following 3 vars can be used when constructing pkg metadata
 # Override as necessary.