Allow make on a read-only source tree using make O=objdir

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@11733 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 27 insertions, 20 deletions

diff --git a/make/calcdep.pl b/make/calcdep.pl
index a4bb7f4d6..261b6ec18 100755
--- a/make/calcdep.pl
+++ b/make/calcdep.pl
@@ -3,6 +3,12 @@ use strict;
 use warnings;
 use Getopt::Long;
 
+my $basesrc = "$ENV{SOURCEPATH}/src";
+my $baseinc = "$ENV{SOURCEPATH}/include";
+my $baseout = `pwd`;
+chomp $baseout;
+chdir $basesrc;
+
 my %f2dep;
 
 sub gendep;
@@ -21,9 +27,9 @@ sub gendep {
 	while (<$in>) {
 		if (/^\s*#\s*include\s*"([^"]+)"/) {
 			my $inc = $1;
-			next if $inc eq 'inspircd_version.h' && $f eq '../include/inspircd.h';
+			next if $inc eq 'inspircd_version.h' && $f eq $baseinc.'/inspircd.h';
 			my $found = 0;
-			for my $loc ("$basedir/$inc", "../include/$inc") {
+			for my $loc ("$basedir/$inc", "$baseinc/$inc") {
 				next unless -e $loc;
 				$found++;
 				$dep{$loc}++;
@@ -31,7 +37,7 @@ sub gendep {
 			}
 			if ($found == 0 && $inc ne 'inspircd_win32wrapper.h') {
 				print STDERR "WARNING: could not find header $inc for $f\n";
-			} elsif ($found > 1 && $basedir ne '../include') {
+			} elsif ($found > 1 && $basedir ne $baseinc) {
 				print STDERR "WARNING: ambiguous include $inc in $f\n";
 			}
 		}
@@ -42,33 +48,30 @@ sub gendep {
 }
 
 sub dep_cpp {
-	my $file = shift;
+	my($file, $dfile) = @_;
 	gendep $file;
 	my($path,$base) = $file =~ m#^((?:.*/)?)([^/]+)\.cpp# or die "Bad file $file";
-	my $cmd = "$path.$base.d";
 	my $ext = $path eq 'modules/' || $path eq 'commands/' ? '.so' : '.o';
 	my $out = "$path$base$ext";
+	$dfile = "$baseout/$path.$base.d" unless defined $dfile;
 
-	open OUT, '>', $cmd;
+	open OUT, '>', "$dfile" or die "Could not write $dfile: $!";
 	print OUT "$out: $file $f2dep{$file}\n";
-	print OUT "\t@../make/unit-cc.pl \$(VERBOSE) $file $out\n";
-	print OUT "$cmd: $file $f2dep{$file}\n";
-	print OUT "\t../make/calcdep.pl -file $file\n";
+	print OUT "\t@\$(SOURCEPATH)/make/unit-cc.pl \$(VERBOSE) \$< $out\n";
 }
 
 sub dep_dir {
-	my $dir = shift;
+	my($dir, $dfile) = @_;
 	if ($dir =~ m#^(.*?)([^/]+)/?$#) {
 		my($path,$base) = ($1,$2);
-		my $cmd = "$path.$base.d";
 		my $out = "$path$base.so";
-		opendir DIR, $dir;
+		$dfile = "$baseout/$path.$base.d" unless defined $dfile;
+		opendir DIR, "$basesrc/$dir";
 		my $ofiles = join ' ', grep s/(.*)\.cpp$/$path$base\/$1.o/, readdir DIR;
 		closedir DIR;
-		open OUT, '>', $cmd;
-		print OUT "$out: $ofiles\n\t".'$(RUNCC) $(PICLDFLAGS) -o $@ '
-			.$ofiles."\n";
-		print OUT "$cmd: $dir\n\t".'@../make/calcdep.pl -file '."$path$base\n";
+		open OUT, '>', "$dfile" or die "Could not write $dfile: $!";
+		print OUT "$out: $ofiles\n\t\$(RUNCC) \$(PICLDFLAGS) -o \$\@ \$^\n";
+		close OUT;
 	} else {
 		print STDERR "Cannot generate depencency for $dir\n";
 		exit 1;
@@ -83,15 +86,17 @@ GetOptions(
 );
 
 if (!$all && !defined $file) {
-	print "Use: $0 {-all|-file filename} [-quiet]\n";
+	print "Use: $0 {-all|-file src dest} [-quiet]\n";
 	exit 1;
 }
 
 if (defined $file) {
+	my $dfile = shift or die "Syntax: -file <in> <out>";
+	$dfile = "$baseout/$dfile" unless $dfile =~ m#^/#;
 	if (-f $file) {
-		dep_cpp $file;
+		dep_cpp $file, $dfile;
 	} elsif (-d $file) {
-		dep_dir $file;
+		dep_dir $file, $dfile;
 	} else {
 		print STDERR "Can't generate dependencies for $file\n";
 		exit 1;
@@ -99,11 +104,13 @@ if (defined $file) {
 } else {
 	my @files = (<*.cpp>, <commands/*.cpp>, <modes/*.cpp>, <modules/*.cpp>, <modules/m_*/*.cpp>);
 	push @files, "socketengines/$ENV{SOCKETENGINE}.cpp", "threadengines/threadengine_pthread.cpp";
+	my @dirs = grep -d, <modules/m_*>;
+	mkdir "$baseout/$_" for qw(commands modes modules socketengines threadengines), @dirs;
+
 	for my $file (@files) {
 		dep_cpp $file;
 	}
 
-	my @dirs = grep -d, <modules/m_*>;
 	for my $dir (@dirs) {
 		dep_dir $dir;
 	}