X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=regen.pl;h=75903ac8f9d12466ca6203fed06d1688d48293b8;hb=f349734105f69ec210de04919b7600476ab1c656;hp=1c830a2cdcff43d36a2ccfbdbf1d16d245de3694;hpb=36bb303b6ac55df9c2780b48d374c505374dc378;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/regen.pl b/regen.pl
index 1c830a2..75903ac 100644
--- a/regen.pl
+++ b/regen.pl
@@ -1,45 +1,70 @@
 #!/usr/bin/perl -w
+#
+# regen.pl - a wrapper that runs all *.pl scripts to to autogenerate files
+
+require 5.003;	# keep this compatible, an old perl is all we may have before
+                # we build the new one
+
+# The idea is to move the regen_headers target out of the Makefile so that
+# it is possible to rebuild the headers before the Makefile is available.
+# (and the Makefile is unavailable until after Configure is run, and we may
+# wish to make a clean source tree but with current headers without running
+# anything else.
+
 use strict;
-use vars qw($Is_W32 $Is_OS2 $Is_Cygwin $Is_NetWare $Needs_Write);
-use Config; # Remember, this is running using an existing perl
+my $perl = $^X;
 
-# Common functions needed by the regen scripts
+# keep warnings.pl in sync with the CPAN distribution by not requiring core
+# changes.  Um, what ?
+# safer_unlink ("warnings.h", "lib/warnings.pm");
 
-$Is_W32 = $^O eq 'MSWin32';
-$Is_OS2 = $^O eq 'os2';
-$Is_Cygwin = $^O eq 'cygwin';
-$Is_NetWare = $Config{osname} eq 'NetWare';
-if ($Is_NetWare) {
-  $Is_W32 = 0;
-}
+# Which scripts to run. Note the ordering: embed.pl must run after
+# opcode.pl, since it depends on pp.sym
 
-$Needs_Write = $Is_OS2 || $Is_W32 || $Is_Cygwin || $Is_NetWare;
+my @scripts = qw(
+keywords.pl
+opcode.pl
+overload.pl
+reentr.pl
+regcomp.pl
+warnings.pl
 
-sub safer_unlink {
-  my @names = @_;
-  my $cnt = 0;
+embed.pl
+);
 
-  my $name;
-  foreach $name (@names) {
-    next unless -e $name;
-    chmod 0777, $name if $Needs_Write;
-    ( CORE::unlink($name) and ++$cnt
-      or warn "Couldn't unlink $name: $!\n" );
-  }
-  return $cnt;
-}
+# Which files are (re)generated by each script.
+# *** We no longer need these values, as the "changed" message is
+# now generated by regen_lib.pl, so should we just drop them?
 
-sub safer_rename_silent {
-  my ($from, $to) = @_;
+my %gen = (
+	   'embed.pl'    => [qw[proto.h embed.h embedvar.h global.sym
+				perlapi.h perlapi.c]],
+	   'keywords.pl' => [qw[keywords.h]],
+	   'opcode.pl'   => [qw[opcode.h opnames.h pp_proto.h pp.sym]],
+	   'regcomp.pl'  => [qw[regnodes.h]],
+	   'warnings.pl' => [qw[warnings.h lib/warnings.pm]],
+	   'reentr.pl'   => [qw[reentr.c reentr.h]],
+	   'overload.pl' => [qw[overload.c overload.h lib/overload/numbers.pm]],
+	   );
 
-  # Some dosish systems can't rename over an existing file:
-  safer_unlink $to;
-  chmod 0600, $from if $Needs_Write;
-  rename $from, $to;
+sub do_cksum {
+    my $pl = shift;
+    my %cksum;
+    for my $f (@{ $gen{$pl} }) {
+	local *FH;
+	if (open(FH, $f)) {
+	    local $/;
+	    $cksum{$f} = unpack("%32C*", <FH>);
+	    close FH;
+	} else {
+	    warn "$0: $f: $!\n";
+	}
+    }
+    return %cksum;
 }
 
-sub safer_rename {
-  my ($from, $to) = @_;
-  safer_rename_silent($from, $to) or die "renaming $from to $to: $!";
+foreach my $pl (@scripts) {
+  my @command =  ($^X, $pl, @ARGV);
+  print "@command\n";
+  system @command;
 }
-1;