#! /usr/bin/perl
#
#  TOPPERS Software
#      Toyohashi Open Platform for Embedded Real-Time Systems
# 
#  Copyright (C) 2000-2003 by Embedded and Real-Time Systems Laboratory
#                              Toyohashi Univ. of Technology, JAPAN
#  Copyright (C) 2004-2007 by Embedded and Real-Time Systems Laboratory
#              Graduate School of Information Science, Nagoya Univ., JAPAN
# 
#  L쌠҂́Cȉ(1)`(4)̏𖞂ꍇɌC{\tgEF
#  Ai{\tgEFAς̂܂ށDȉjgpEE
#  ρEĔzziȉCpƌĂԁj邱Ƃ𖳏ŋD
#  (1) {\tgEFA\[XR[ȟ`ŗpꍇɂ́CL̒
#      \C̗pщL̖ۏ؋K肪Ĉ܂܂̌`Ń\[
#      XR[hɊ܂܂Ă邱ƁD
#  (2) {\tgEFACCu`ȂǁC̃\tgEFAJɎg
#      pł`ōĔzzꍇɂ́CĔzzɔhLgip
#      ҃}jAȂǁjɁCL̒쌠\C̗pщL
#      ̖ۏ؋Kfڂ邱ƁD
#  (3) {\tgEFAC@ɑgݍނȂǁC̃\tgEFAJɎg
#      płȂ`ōĔzzꍇɂ́Ĉꂩ̏𖞂
#      ƁD
#    (a) ĔzzɔhLgip҃}jAȂǁjɁCL̒
#        쌠\C̗pщL̖ۏ؋Kfڂ邱ƁD
#    (b) Ĕzž`ԂCʂɒ߂@ɂāCTOPPERSvWFNg
#        񍐂邱ƁD
#  (4) {\tgEFA̗pɂ蒼ړI܂͊ԐړIɐ邢Ȃ鑹
#      QCL쌠҂TOPPERSvWFNgƐӂ邱ƁD
#      ܂C{\tgEFÃ[U܂̓Gh[ÛȂ闝
#      RɊÂCL쌠҂TOPPERSvWFNg
#      Ɛӂ邱ƁD
# 
#  {\tgEFÁCۏ؂Œ񋟂Ă̂łDL쌠҂
#  TOPPERSvWFNǵC{\tgEFAɊւāC̎gpړI
#  ɑ΂K܂߂āCȂۏ؂sȂD܂C{\tgEF
#  A̗pɂ蒼ړI܂͊ԐړIɐȂ鑹QɊւĂC
#  ̐ӔC𕉂ȂD
# 
#  @(#) $Id: makedep 1524 2009-04-29 03:37:27Z ertl-hiro $
# 

require "getopt.pl";

#  IvV̒`
#
#  -C <cc_path>		CRpC̃R}h
#  -O <cc_opts>		CRpC/CPPɓnIvV
#  -X				\[Xt@CICwb_t@CƌȂ
#
#  -T <target>		^[Qbg̃t@C
#  -D <t_dir>		^[Qbg̃fBNgw肷
#  -d				^[Qbg̃fBNgێ
#
#  -R <dirname>		Cygwinɂ郋[gfBNgw肷
#					iftHgcygdrivej

#
#  IvV̏
#
do Getopt("COTDR");

$cc_path = $opt_C;
$cc_opts = $opt_O;

if ($opt_T) {
	$target_file = $opt_T;
}
elsif ($opt_D) {
	$target_dir = $opt_D;
}
elsif (!$opt_d) {
	$target_dir = "";
}

if ($opt_R) {
	$cygwin_root = $opt_R;
}
else {
	$cygwin_root = "cygdrive";
}

#
#  Cygwin̔
#
use POSIX;
@uname = do uname();
if ($uname[0] =~ /^cygwin/i) {
	$cygwin = 1;
}

#
#  %dependlist ɍꂽˑ֌Wo͂
#
sub output_dependlist {
	local($file) = @_;
	local($target, $column, $len);

	if ($target_file) {
		$target = $target_file;
	}
	else {
		$target = $file;
		$target =~ s/(.*)\.(.*)/$1.o/;
	}	
	if (defined($target_dir)) {
		$target =~ s/^.*\/([^\/]+)$/$1/;
		if ($target_dir) {
			$target = $target_dir."/".$target;
		}
	}
	print $target, ": ";
	$column = length($target) + 2;
    
	foreach $file (keys(%dependlist)) {
		$len = length($file) + 1;
		if ($column > 8 && $column + $len >= 70) {
			print "\\\n\t";
			$column = 8;
		}
		$column += $len;
		print "$file ";
	}
	print "\n";
}

#
#  $file ̈ˑ֌W %dependlist ɍ
#
sub makedepend_one {
	local($file) = @_;
	local($command, $input, $dir, $filename);

	$command = "$cc_path -E $cc_opts";
	if ($opt_X) {
		$command .= " -x c-header";
	}
	unless (open(INPUT, "$command $file |")) {
		print STDERR "makedep: can't open $file\n";
		exit(1);
	}
	while ($line = <INPUT>) {
		if ($line =~ /^\#\s*([0-9]+)\s*\"([^\"]+)\"/) {
			$filename = $2;
			$filename =~ s/ /\\ /g;
			if ($filename !~ /^\<.*\>$/ && $filename !~ /\/$/) {
				if ($cygwin) {
					$filename =~ s/^([a-zA-Z]):/\/$cygwin_root\/$1/;
				}
				$dependlist{$filename} = 1;
			}
		}
	}
	unless (close(INPUT)) {
		print STDERR "makedep: can't execute $command\n";
		exit(1);
	}
}

#
#  C[`
#
foreach $file (@ARGV) {
	%dependlist = ();
	do makedepend_one($file);
	do output_dependlist($file) if (%dependlist);
}
