1 files changed, 47 insertions, 0 deletions
diff --git a/vms/vms_yfix.pl b/vms/vms_yfix.pl
new file mode 100644
index 0000000000..323a40d792
--- /dev/null
+++ b/vms/vms_yfix.pl
@@ -0,0 +1,47 @@
+# This script takes the output produced from perly.y by byacc and
+# the perly.fixer shell script (i.e. the perly.c and perly.h built
+# for Unix systems) and patches them to produce copies containing
+# appropriate declarations for VMS handling of global symbols.
+#
+# If it finds that the input files are already patches for VMS,
+# it just copies the input to the output.
+#
+# Revised 26-May-1995 by Charles Bailey  bailey@genetics.upenn.edu
+
+($cinfile,$hinfile,$coutfile,$houtfile) = @ARGV;
+
+open C,$cinfile or die "Can't read $cinfile: $!\n";
+open COUT, ">$coutfile" or die "Can't create $coutfile: $!\n";
+while (<C>) {
+  if (/^dEXT/) {  # we've already got a fixed copy
+    print COUT $_,<C>;
+    last;
+  }
+  # add the dEXT tag to definitions of global vars, so we'll insert
+  # a globaldef when perly.c is compiled
+  s/^(short|int|YYSTYPE|char \*)\s*yy/dEXT $1 yy/;
+  print COUT;
+}
+close C;
+close COUT;
+
+open H,$hinfile  or die "Can't read $hinfile: $!\n";
+open HOUT, ">$houtfile" or die "Can't create $houtfile: $!\n";
+$hfixed = 0;  # keep -w happy
+while (<H>) {
+  $hfixed = /globalref/ unless $hfixed;  # we've already got a fixed copy
+  next if /^extern YYSTYPE yylval/;  # we've got a Unix version, and this
+                                     # is what we want to replace
+  print HOUT;
+}
+close H;
+
+print HOUT <<'EODECL' unless $hfixed;
+#ifndef vax11c
+  extern YYSTYPE yylval;
+#else
+  globalref YYSTYPE yylval;
+#endif
+EODECL
+
+close HOUT;