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[p5sagit/p5-mst-13.2.git] / ext / util / make_ext.pl

#!/bin/perl
use strict;
use warnings;

# This script acts as a simple interface for building extensions.
# It primarily used by the perl Makefile:
#
# d_dummy $(dynamic_ext): miniperl preplibrary FORCE
# 	@$(RUN) ./miniperl ext/util/make_ext.pl dynamic $@ MAKE=$(MAKE) LIBPERL_A=$(LIBPERL)
#
# It may be deleted in a later release of perl so try to
# avoid using it for other purposes.

my $target   = shift(@ARGV);
my $extspec  = shift(@ARGV);
my $makecmd  = shift(@ARGV); # Should be something like MAKE=make
my $passthru = join(' ', @ARGV); # allow extra macro=value to be passed through
print "\n";

# Previously, $make was taken from config.sh.  However, the user might
# instead be running a possibly incompatible make.  This might happen if
# the user types "gmake" instead of a plain "make", for example.  The
# correct current value of MAKE will come through from the main perl
# makefile as MAKE=/whatever/make in $makecmd.  We'll be cautious in
# case third party users of this script (are there any?) don't have the
# MAKE=$(MAKE) argument, which was added after 5.004_03.
my $make;
if (defined($makecmd) and $makecmd =~ /^MAKE=(.*)$/) {
	$make = $1;
}
else {
	print "ext/util/make_ext:  WARNING:  Please include MAKE=\$(MAKE)\n";
	print "\tin your call to make_ext.  See ext/util/make_ext for details.\n";
	exit(1);
}

# search config.sh for inclusion
$ENV{CONFIG} = '' if not defined $ENV{CONFIG};
if ($ENV{CONFIG} eq '') {
	my $config;
	foreach my $depth (0..4) {
		my $file = ('../' x $depth) . 'config.sh';
		$config = $file, last if -f $file;
	}
	print("Can't find config.sh generated by Configure"), exit(1)
	  unless defined $config;
  
	load_config_sh($config);
}

# fallback to config.sh's MAKE
$make ||= $ENV{make} || $ENV{MAKE};
my $run = $ENV{run};
$run = '' if not defined $run;
$run .= ' ' if $run ne '';;

if (!defined($extspec) or $extspec eq '')  {
	print "make_ext: no extension specified\n";
	exit(1);
}

# The Perl Makefile.SH will expand all extensions to
#	lib/auto/X/X.a  (or lib/auto/X/Y/Y.a if nested)
# A user wishing to run make_ext might use
#	X (or X/Y or X::Y if nested)

# canonise into X/Y form (pname)

my $pname = $extspec;
if ($extspec =~ /^lib/) {
	# Remove lib/auto prefix and /*.* suffix
	$pname =~ s{^lib/auto/}{};
	$pname =~ s{[^/]*\.[^/]*$}{};
}
elsif ($extspec =~ /^ext/) {
	# Remove ext/ prefix and /pm_to_blib suffix
	$pname =~ s{^ext/}{};
	$pname =~ s{/pm_to_blib$}{};
}
elsif ($extspec =~ /::/) {
	# Convert :: to /
	$pname =~ s{::}{\/}g;
}
elsif ($extspec =~ /\..*o$/) {
	$pname =~ s/\..*o//;
}

my $mname = $pname;
$mname =~ s!/!::!g;
my $depth = $pname;
$depth =~ s![^/]+!..!g;
my $makefile = "Makefile";
my $makeargs = '';
my $makeopts = '';

if (not -d "ext/$pname") {
	print "\tSkipping $extspec (directory does not exist)\n";
	exit(0); # not an error ?
}

if ($ENV{osname} eq 'catamount') {
	# Snowball's chance of building extensions.
	print "This is $ENV{osname}, not building $mname, sorry.\n";
	exit(0);
}

print "\tMaking $mname ($target)\n";

chdir("ext/$pname");

# check link type and do any preliminaries.  Valid link types are
# 'dynamic', 'static', and 'static_pic' (the last one respects
# CCCDLFLAGS such as -fPIC -- see static_target in the main Makefile.SH)
if ($target eq 'dynamic') {
	$makeargs = "LINKTYPE=dynamic";
	$target   = 'all';
}
elsif ($target eq 'static') {
	$makeargs = "LINKTYPE=static CCCDLFLAGS=";
	$target   = 'all';
}
elsif ($target eq 'static_pic') {
	$makeargs = "LINKTYPE=static";
	$target   = 'all';
}
elsif ($target eq 'nonxs') {
	$makeargs = "";
	$target   = 'all';
}
elsif ($target =~ /clean$/) {
	# If Makefile has been moved to Makefile.old by a make clean
	# then use Makefile.old for realclean rather than rebuild it
	if (! -f $makefile and -f "Makefile.old") {
		$makefile = "Makefile.old";
		$makeopts = "-f $makefile";
		print "Note: Using Makefile.old\n";
	}
}
elsif ($target eq '') {
	print "make_ext: no make target specified (eg static or dynamic)\n";
	exit(1);
}
else {
	# for the time being we are strict about what make_ext is used for
	print "make_ext: unknown make target '$target'\n";
	exit(1);
}


if (not -f $makefile) {
	if (-f "Makefile.PL") {
		system("${run}../$depth/miniperl -I../$depth/lib Makefile.PL INSTALLDIRS=perl INSTALLMAN3DIR=none PERL_CORE=1 $passthru");
	}
}

if (not -f $makefile) {
	print "Warning: No Makefile!\n";
}

if ($target eq 'clean') {
}
elsif ($target eq 'realclean') {
}
else {
	# Give makefile an opportunity to rewrite itself.
	# reassure users that life goes on...
	system( "$run$make config MAKE=$make $passthru" )
	  and print "$make config failed, continuing anyway...\n";
}

system(
	"$run$make $target MAKE=$make $makeargs $passthru"
) or exit();

exit($?);

# read config.sh and add its keys to our %ENV
sub load_config_sh {
	my $file = shift;
	open my $fh, '<', $file or die "Could not open file '$file' as a 'config.sh': $!";
	while (<$fh>) {
		chomp;
		next if /^\s*#/;
		$ENV{$1} = $3 if /^(?!:)([^\s=]+)=('?)(.*?)\2$/;
	}
	close $fh;
}