awk -f versnum ../patchlevel.h
. buildinfo
builddir = `{ cd .. ; pwd }
-if(flag a) platforms = (386 mips sparc 68020)
-if not platforms = $objtype
+if (~ $#* 0) platforms = $objtype
+if not switch($1) {
+ case -a ; platforms = (386 mips sparc 68020)
+ case * ; echo 'Usage: setup.rc [-a]' >[1=2] ; exit
+}
sourcedir=/sys/src/cmd/perl/$p9pvers
privlib=/sys/lib/perl
sitelib=$privlib/site_perl