#-*- perl -*-
# Copyright (C) 2000-2005 R Development Core Team
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the GNU
# General Public License for more details.
#
# A copy of the GNU General Public License is available via WWW at
# http://www.gnu.org/copyleft/gpl.html.	 You can also obtain it by
# writing to the Free Software Foundation, Inc., 51 Franklin Street,
# Fifth Floor, Boston, MA 02110-1301  USA.

# Send any bug reports to r-bugs@r-project.org

use Cwd;
use File::Basename;
use File::Path;
use Getopt::Long;
use R::Utils;


my $revision = ' $Rev$ ';
my $version;
my $name;
$revision =~ / ([\d\.]*) /;
$version = $1;
($name = $0) =~ s|.*/||;


my @knownoptions = ("help|h", "version|v", "output|o:s", "debug|d");
			
GetOptions (@knownoptions) || usage();
R_version($name, $version) if $opt_version;
usage() if $opt_help;

my $R_HOME = $ENV{'R_HOME'} ||
    die "Error: Environment variable R_HOME not found\n";

my $debug;
$debug = "DEBUG=T" if($opt_debug);
my $dllname;
if($opt_output){
    $dllname = $opt_output;
    $dllname  =~ s/\.dll$//;
} else {
    $dllname = $ARGV[0];
    $dllname =~ s/\.[^\.]+$//;
}

my @cfsrcs, @csrcs, @cxxsrcs;
foreach $src (@ARGV) {
    if ($src =~ /\.(cc|cpp|C)$/) {
	push @cxxsrcs, $src;
    } elsif ($src =~ /\.c$/) {
	push @csrcs, $src;
	push @cfsrcs, $src;
    } elsif ($src =~ /\.(f90|f95)$/) {
	push @cfsrcs, $src;
    } else {
	push @cfsrcs, $src;
    }
}

my $srcs=join(" ", @cfsrcs);
my $csrcs=join(" ", @csrcs);
my $cxx=join(" ", @cxxsrcs);
my $makefiles = "-f $R_HOME/src/gnuwin32/MakeDll";
## Rcmd.exe ensures HOME is set
if (-r "$HOME/.R/Makevars.win32") {
    $makefiles="$makefiles -f \"$HOME/.R/Makevars.win\"";
} elsif (-r "$HOME/.R/Makevars") {
    $makefiles="$makefiles -f \"$HOME/.R/Makevars\"";
}

system("make -$makefiles RHOME=$R_HOME $debug DLLNAME=$dllname CSOURCES='$csrcs' CFSOURCES='$srcs' CXXSOURCES='$cxx' RCOBJ=");


sub usage {
    print STDERR <<END;
Usage: R CMD $name [options] files

Build a DLL (shared library) for dynamic loading from the specified source 
or object files (which are automagically made from their sources).  If not
given via \`--output\', the name for the DLL is determined from the
first file.

Options:
  -d, --debug           build a debug DLL
  -h, --help		print short help message and exit
  -o, --output=LIB	use LIB as the name for the DLL
  -v, --version		print version info and exit

Report bugs to <r-bugs\@r-project.org>.
END
    exit 0;
}