perl 5.002gamma: utils/h2xs.PL

>From roehrich@cray.comTue Feb  6 10:10:30 1996
>Date: Mon, 5 Feb 1996 20:30:34 -0600
>From: Dean Roehrich <roehrich@cray.com>
>To: perl5-porters@africa.nicoh.com
>Subject: h2xs 1.15
>
>This is h2xs version 1.15.  Apply over beta3.
>
>From roehrich@cray.comWed Feb  7 09:17:51 1996
>Date: Tue, 6 Feb 1996 18:31:53 -0600
>From: Dean Roehrich <roehrich@cray.com>
>To: perl5-porters@africa.nicoh.com
>Subject: h2xs 1.16
>
>Following a suggestion from PaulM, I have updated the AUTOLOAD() that h2xs
>creates.  It uses Carp::croak now.

1 files changed, 93 insertions, 21 deletions

diff --git a/utils/h2xs.PL b/utils/h2xs.PL
index 26f10c7687..4e64d86885 100644
--- a/utils/h2xs.PL
+++ b/utils/h2xs.PL
@@ -41,7 +41,7 @@ h2xs - convert .h C header files to Perl extensions
 
 =head1 SYNOPSIS
 
-B<h2xs> [B<-APcf>] [B<-v> version] [B<-n> module_name] [headerfile [extra_libraries]]
+B<h2xs> [B<-AOPXcf>] [B<-v> version] [B<-n> module_name] [headerfile [extra_libraries]]
 
 B<h2xs> B<-h>
 
@@ -73,6 +73,10 @@ in the extra-libraries argument.
 Omit all autoload facilities.  This is the same as B<-c> but also removes the
 S<C<require AutoLoader>> statement from the .pm file.
 
+=item B<-O>
+
+Allows a pre-existing extension directory to be overwritten.
+
 =item B<-P>
 
 Omit the autogenerated stub POD section. 
@@ -100,6 +104,11 @@ Specifies a name to be used for the extension, e.g., S<-n RPC::DCE>
 Specify a version number for this extension.  This version number is added
 to the templates.  The default is 0.01.
 
+=item B<-X>
+
+Omit the XS portion.  Used to generate templates for a module which is not
+XS-based.
+
 =back
 
 =head1 EXAMPLES
@@ -149,20 +158,22 @@ The usual warnings if it can't read or write the files involved.
 
 =cut
 
-my( $H2XS_VERSION ) = '$Revision: 1.14 $' =~ /\$Revision:\s+([^\s]+)/;
+my( $H2XS_VERSION ) = '$Revision: 1.16 $' =~ /\$Revision:\s+([^\s]+)/;
 my $TEMPLATE_VERSION = '0.01';
 
 use Getopt::Std;
 
 sub usage{
 	warn "@_\n" if @_;
-    die "h2xs [-APcfh] [-v version] [-n module_name] [headerfile [extra_libraries]]
+    die "h2xs [-AOPXcfh] [-v version] [-n module_name] [headerfile [extra_libraries]]
 version: $H2XS_VERSION
     -f   Force creation of the extension even if the C header does not exist.
     -n   Specify a name to use for the extension (recommended).
     -c   Omit the constant() function and specialised AUTOLOAD from the XS file.
     -A   Omit all autoloading facilities (implies -c).
+    -O   Allow overwriting of a pre-existing extension directory.
     -P   Omit the stub POD section.
+    -X   Omit the XS portion.
     -v   Specify a version number for this extension.
     -h   Display this help message
 extra_libraries
@@ -172,7 +183,7 @@ extra_libraries
 }
 
 
-getopts("APcfhv:n:") || usage;
+getopts("AOPXcfhv:n:") || usage;
 
 usage if $opt_h;
 
@@ -237,7 +248,11 @@ else {
 }
 
 
-die "Won't overwrite existing $ext$modpname\n" if -e $modpname;
+if ($opt_O) {
+	warn "Overwriting existing $ext$modpname!!!\n" if -e $modpname;
+} else {
+	die "Won't overwrite existing $ext$modpname\n" if -e $modpname;
+}
 if( $nested ){
 	$modpath = "";
 	foreach (@modparts){
@@ -248,7 +263,9 @@ if( $nested ){
 mkdir($modpname, 0777);
 chdir($modpname) || die "Can't chdir $ext$modpname: $!\n";
 
-open(XS, ">$modfname.xs") || die "Can't create $ext$modpname/$modfname.xs: $!\n";
+if( ! $opt_X ){  # use XS, unless it was disabled
+  open(XS, ">$modfname.xs") || die "Can't create $ext$modpname/$modfname.xs: $!\n";
+}
 open(PM, ">$modfname.pm") || die "Can't create $ext$modpname/$modfname.pm: $!\n";
 
 $" = "\n\t";
@@ -257,31 +274,72 @@ warn "Writing $ext$modpname/$modfname.pm\n";
 print PM <<"END";
 package $module;
 
+use strict;
+END
+
+if( $opt_X || $opt_c || $opt_A ){
+	# we won't have our own AUTOLOAD(), so won't have $AUTOLOAD
+	print PM <<'END';
+use vars qw($VERSION @ISA @EXPORT);
+END
+}
+else{
+	# we'll have an AUTOLOAD(), and it will have $AUTOLOAD and
+	# will want Carp.
+	print PM <<'END';
+use Carp;
+use vars qw($VERSION @ISA @EXPORT $AUTOLOAD);
+END
+}
+
+print PM <<'END';
+
 require Exporter;
+END
+
+print PM <<"END" if ! $opt_X;  # use DynaLoader, unless XS was disabled
 require DynaLoader;
 END
 
-if( ! $opt_A ){
+# require autoloader if XS is disabled.
+# if XS is enabled, require autoloader unless autoloading is disabled.
+if( $opt_X || (! $opt_A) ){
 	print PM <<"END";
 require AutoLoader;
 END
 }
 
-if( $opt_c && ! $opt_A ){
+if( $opt_X || ($opt_c && ! $opt_A) ){
 	# we won't have our own AUTOLOAD(), so we'll inherit it.
-	print PM <<"END";
+	if( ! $opt_X ) { # use DynaLoader, unless XS was disabled
+		print PM <<"END";
 
 \@ISA = qw(Exporter AutoLoader DynaLoader);
 END
+	}
+	else{
+		print PM <<"END";
+
+\@ISA = qw(Exporter AutoLoader);
+END
+	}
 }
 else{
 	# 1) we have our own AUTOLOAD(), so don't need to inherit it.
 	# or
 	# 2) we don't want autoloading mentioned.
-	print PM <<"END";
+	if( ! $opt_X ){ # use DynaLoader, unless XS was disabled
+		print PM <<"END";
 
 \@ISA = qw(Exporter DynaLoader);
 END
+	}
+	else{
+		print PM <<"END";
+
+\@ISA = qw(Exporter);
+END
+	}
 }
 
 print PM<<"END";
@@ -295,23 +353,22 @@ print PM<<"END";
 
 END
 
-print PM <<"END" unless $opt_c;
+print PM <<"END" unless $opt_c or $opt_X;
 sub AUTOLOAD {
     # This AUTOLOAD is used to 'autoload' constants from the constant()
     # XS function.  If a constant is not found then control is passed
     # to the AUTOLOAD in AutoLoader.
 
-    local(\$constname);
+    my \$constname;
     (\$constname = \$AUTOLOAD) =~ s/.*:://;
-    \$val = constant(\$constname, \@_ ? \$_[0] : 0);
+    my \$val = constant(\$constname, \@_ ? \$_[0] : 0);
     if (\$! != 0) {
 	if (\$! =~ /Invalid/) {
 	    \$AutoLoader::AUTOLOAD = \$AUTOLOAD;
 	    goto &AutoLoader::AUTOLOAD;
 	}
 	else {
-	    (\$pack,\$file,\$line) = caller;
-	    die "Your vendor has not defined $module macro \$constname, used at \$file line \$line.\n";
+		croak "Your vendor has not defined $module macro \$constname";
 	}
     }
     eval "sub \$AUTOLOAD { \$val }";
@@ -320,12 +377,24 @@ sub AUTOLOAD {
 
 END
 
-print PM <<"END";
+if( ! $opt_X ){ # print bootstrap, unless XS is disabled
+	print PM <<"END";
 bootstrap $module \$VERSION;
+END
+}
+
+if( $opt_P ){ # if POD is disabled
+	$after = '__END__';
+}
+else {
+	$after = '=cut';
+}
+
+print PM <<"END";
 
 # Preloaded methods go here.
 
-# Autoload methods go after __END__, and are processed by the autosplit program.
+# Autoload methods go after $after, and are processed by the autosplit program.
 
 1;
 __END__
@@ -371,6 +440,7 @@ print PM $pod unless $opt_P;
 close PM;
 
 
+if( ! $opt_X ){ # print XS, unless it is disabled
 warn "Writing $ext$modpname/$modfname.xs\n";
 
 print XS <<"END";
@@ -474,7 +544,7 @@ constant(name,arg)
 END
 
 close XS;
-
+} # if( ! $opt_X )
 
 warn "Writing $ext$modpname/Makefile.PL\n";
 open(PL, ">Makefile.PL") || die "Can't create $ext$modpname/Makefile.PL: $!\n";
@@ -487,9 +557,11 @@ END
 print PL "WriteMakefile(\n";
 print PL "    'NAME'	=> '$module',\n";
 print PL "    'VERSION_FROM' => '$modfname.pm', # finds \$VERSION\n"; 
-print PL "    'LIBS'	=> ['$extralibs'],   # e.g., '-lm' \n";
-print PL "    'DEFINE'	=> '',     # e.g., '-DHAVE_SOMETHING' \n";
-print PL "    'INC'	=> '',     # e.g., '-I/usr/include/other' \n";
+if( ! $opt_X ){ # print C stuff, unless XS is disabled
+  print PL "    'LIBS'	=> ['$extralibs'],   # e.g., '-lm' \n";
+  print PL "    'DEFINE'	=> '',     # e.g., '-DHAVE_SOMETHING' \n";
+  print PL "    'INC'	=> '',     # e.g., '-I/usr/include/other' \n";
+}
 print PL ");\n";
 close(PL) || die "Can't close $ext$modpname/Makefile.PL: $!\n";