tweak run_byacc recipe

p4raw-id: //depot/perl@1901

2 files changed, 6 insertions, 3 deletions

diff --git a/Makefile.SH b/Makefile.SH
index f925a97ad9..9f489f50b2 100644
--- a/Makefile.SH
+++ b/Makefile.SH
@@ -435,7 +435,7 @@ run_byacc:	FORCE
 	sh $(shellflags) ./perly.fixer y.tab.c perly.c
 	sed -e 's/fprintf *( *stderr *,/PerlIO_printf(Perl_debug_log,/g' \
 	    -e 's/y\.tab/perly/g' perly.c >perly.tmp && mv perly.tmp perly.c
-	echo 'extern YYSTYPE yylval;' >>y.tab.h
+	sed -e '/^extern YYSTYPE yy/D' y.tab.h >yh.tmp && mv yh.tmp y.tab.h
 	cmp -s y.tab.h perly.h && rm -f y.tab.h || mv y.tab.h perly.h
 	chmod 664 vms/perly_c.vms vms/perly_h.vms
 	perl vms/vms_yfix.pl perly.c perly.h vms/perly_c.vms vms/perly_h.vms
diff --git a/Porting/pumpkin.pod b/Porting/pumpkin.pod
index f41dfaca1a..f62f753056 100644
--- a/Porting/pumpkin.pod
+++ b/Porting/pumpkin.pod
@@ -411,6 +411,9 @@ output statements mean the patch won't apply cleanly.  Long ago I
 started to fix F<perly.fixer> to detect this, but I never completed the
 task.
 
+If C<perly.c> changes, make sure you run C<perl vms/vms_yfix.pl> to
+update the corresponding VMS files.  See L<VMS-specific updates>.
+
 Some additional notes from Larry on this:
 
 Don't forget to regenerate perly_c.diff.
@@ -520,8 +523,8 @@ things that need to be fixed in Configure.
 
 =head2 VMS-specific updates
 
-If you have changed F<perly.y>, then you may want to update
-F<vms/perly_{h,c}.vms> by running C<perl vms/vms_yfix.pl>.
+If you have changed F<perly.y> or F<perly.c>, then you most probably want
+to update F<vms/perly_{h,c}.vms> by running C<perl vms/vms_yfix.pl>.
 
 The Perl version number appears in several places under F<vms>.
 It is courteous to update these versions.  For example, if you are