[apple/libc.git] / xcodescripts / generate_features.pl

#!/usr/bin/perl

if ($ENV{"ACTION"} eq "installhdrs") {
	exit 0;
}

# Generates the libc-features.h files used to control #ifdef behaviour in Libc
use warnings;
use Data::Dumper;
use File::Path qw(mkpath);

#printf Dumper(\%ENV);

my $unifdef = 0;
my %unifdefs = ();
my $bash = 0;
if (scalar(@ARGV) > 0) {
	$unifdef = 1 if $ARGV[0] =~ /--unifdef/;
	$bash = 1 if $ARGV[0] =~ /--bash/;
}

for my $arch (split(/ /, $ENV{"ARCHS"}))
{
	# set ENV{"CURRENT_ARCH"} so we can predicate on it
	$ENV{"CURRENT_ARCH"} = $arch;
	
	my $platformName = $ENV{"PLATFORM_NAME"};
	$platformName =~ s/simulator/os/;

	my $platformPath = $ENV{"SRCROOT"} . "/Platforms/" . $platformName . "/Makefile.inc";
	my $featuresHeaderDir = $ENV{"DERIVED_FILES_DIR"}."/".$arch;
	my $featuresHeader = $featuresHeaderDir."/libc-features.h";

	open FEATURESFILE, "<$platformPath" or die "Unable to open: $platformPath";

	my %features = ();
	my $skip = 0;
	my $nested = 0;

	while (<FEATURESFILE>) {
		next if $_ =~ /\s*#/;
		
		if ($_ =~ /^.endif/) {
			$skip-- if $skip > 0;
			$nested--;
		}

		elsif ($_ =~ /^\.if\s+(\S+)\s+(\S+)/) {
			# an if statement, very rudimentary regex against envvar
			my $envvar = $1;
			my $regex = $2;
			
			$nested++;
			if (!defined($ENV{$envvar}) || ($ENV{$envvar} !~ /$regex/)) {
				$skip += 1;
			}
		}
			
		elsif ($_ =~ /^\s*([^= ]+)\s*=\s*(\d)/) {
			if ($skip == 0) {
				if ($2 == 1) {
					$features{$1} = $2;
				} elsif (defined($features{$1})) {
					delete $features{$1};
				}
			}
		}
	}

	close FEATURESFILE;
	
	if ($bash == 1) {
		for my $f (keys %features) {
			print "$f=$features{$f} ";
		}
		printf "\n";
		exit 0;
	}

	elsif ($unifdef == 1) {
		if ($platformName eq "macosx") {
			$unifdefs{"__OSX_OPEN_SOURCE__"} = 1;
		}
		# assume FEATURE_BLOCKS was on by default
		$unifdefs{"UNIFDEF_BLOCKS"} = 1;
		$unifdefs{"UNIFDEF_LEGACY_64_APIS"} = defined($features{"FEATURE_LEGACY_64_APIS"});
		$unifdefs{"UNIFDEF_LEGACY_RUNE_APIS"} = defined($features{"FEATURE_LEGACY_RUNE_APIS"});
		$unifdefs{"UNIFDEF_LEGACY_UTMP_APIS"} = defined($features{"FEATURE_LEGACY_UTMP_APIS"});
		$unifdefs{"UNIFDEF_MOVE_LOCALTIME"} = defined($features{"FEATURE_MOVE_LOCALTIME"});
		$unifdefs{"UNIFDEF_TZDIR_SYMLINK"} = defined($features{"FEATURE_TZDIR_SYMLINK"});
		
		my $output = "";
		for my $d (keys %unifdefs) {
			$output .= " " . ($unifdefs{$d} == 1 ? "-D" : "-U") . $d;
		}
		
		chomp $output;
		print "$output\n";
		exit 0;
	}
	
	elsif ($unifdef == 0) {
		# If we touch this file on every build, then every other iterative build in Xcode will rebuild *everything*
		my $platform_mtime = (stat($platformPath))[9];
		my $header_mtime = (stat($featuresHeader))[9];

		if (defined($header_mtime) && defined($platform_mtime) && ($header_mtime > $platform_mtime)) {
			exit 0;
		}

		printf $arch." features:\n";
		printf Dumper(\%features);

		if ($nested != 0) {
			die "Unbalanced .if/.endif directive";
		}

		# And the meat, new header options should go under here
		if (! -d $featuresHeaderDir) {
			mkpath $featuresHeaderDir or die "Unable to mkdir: $featuresHeaderDir";
		}
		open HEADER, ">$featuresHeader" or die "Unable to open (for writing): $featuresHeader";

		printf HEADER "#ifndef _LIBC_FEATURES_H_\n";
		printf HEADER "#define _LIBC_FEATURES_H_\n\n";

		my $shortarch = $arch;
		$shortarch =~ s/armv\d+[a-z]?/arm/g;

		printf HEADER "#if !defined(__".$shortarch."__)\n";
		printf HEADER "#error Mismatched libc-features.h architecture\n";
		printf HEADER "#endif\n\n";

		if (defined($features{"FEATURE_LEGACY_RUNE_APIS"})) {
			printf HEADER "#define UNIFDEF_LEGACY_RUNE_APIS 1\n";
		} else {
			printf HEADER "/* #undef UNIFDEF_LEGACY_RUNE_APIS */\n";
		}

		if (defined($features{"FEATURE_LEGACY_CRT1_ENVIRON"})) {
			printf HEADER "#define LEGACY_CRT1_ENVIRON 1\n";
		} else {
			printf HEADER "/* #undef LEGACY_CRT1_ENVIRON */\n";
		}

		if (defined($features{"FEATURE_LEGACY_UTMP_APIS"})) {
			printf HEADER "#define UNIFDEF_LEGACY_UTMP_APIS 1\n";
		} else {
			printf HEADER "/* #undef UNIFDEF_LEGACY_UTMP_APIS */\n";
		}

		if (defined($features{"FEATURE_MOVE_LOCALTIME"})) {
			printf HEADER "#define UNIFDEF_MOVE_LOCALTIME 1\n";
		} else {
			printf HEADER "/* #undef UNIFDEF_MOVE_LOCALTIME */\n";
		}

		if (defined($features{"FEATURE_TZDIR_SYMLINK"})) {
			printf HEADER "#define UNIFDEF_TZDIR_SYMLINK 1\n";
		} else {
			printf HEADER "/* #undef UNIFDEF_TZDIR_SYMLINK */\n";
		}

		if (defined($features{"FEATURE_ONLY_1050_VARIANTS"})) {
			printf HEADER "#if !__DARWIN_ONLY_VERS_1050\n";
			printf HEADER "#  error Feature mismatch: __DARWIN_ONLY_VERS_1050 == 0\n";
			printf HEADER "#endif /* !__DARWIN_ONLY_VERS_1050 */\n";
		} else {
			printf HEADER "#if __DARWIN_ONLY_VERS_1050\n";
			printf HEADER "#  error Feature mismatch: __DARWIN_ONLY_VERS_1050 == 1\n";
			printf HEADER "#endif /* __DARWIN_ONLY_VERS_1050 */\n";
		}

		if (defined($features{"FEATURE_ONLY_UNIX_CONFORMANCE"})) {
			printf HEADER "#if !__DARWIN_ONLY_UNIX_CONFORMANCE\n";
			printf HEADER "#  error Feature mismatch: __DARWIN_ONLY_UNIX_CONFORMANCE == 0\n";
			printf HEADER "#endif /* !__DARWIN_ONLY_UNIX_CONFORMANCE */\n";
		} else {
			printf HEADER "#if __DARWIN_ONLY_UNIX_CONFORMANCE\n";
			printf HEADER "#  error Feature mismatch: __DARWIN_ONLY_UNIX_CONFORMANCE == 1\n";
			printf HEADER "#endif /* __DARWIN_ONLY_UNIX_CONFORMANCE */\n";
		}

		if (defined($features{"FEATURE_ONLY_64_BIT_INO_T"})) {
			printf HEADER "#if !__DARWIN_ONLY_64_BIT_INO_T\n";
			printf HEADER "#  error Feature mismatch: __DARWIN_ONLY_64_BIT_INO_T == 0\n";
			printf HEADER "#endif /* !__DARWIN_ONLY_64_BIT_INO_T */\n";
		} else {
			printf HEADER "#if __DARWIN_ONLY_64_BIT_INO_T\n";
			printf HEADER "#  error Feature mismatch: __DARWIN_ONLY_64_BIT_INO_T == 1\n";
			printf HEADER "#endif /* __DARWIN_ONLY_64_BIT_INO_T */\n";
		}

		if (defined($features{"FEATURE_PATCH_3417676"})) {
			printf HEADER "#define __APPLE_PR3417676_HACK__ 1\n";
		} else {
			printf HEADER "/* #undef __APPLE_PR3417676_HACK__ */\n";
		}

		if (defined($features{"FEATURE_PLOCKSTAT"})) {
			printf HEADER "#define PLOCKSTAT 1\n";
		} else {
			printf HEADER "/* #undef PLOCKSTAT */\n";
		}

		if (defined($features{"FEATURE_TIMEZONE_CHANGE_NOTIFICATION"})) {
			printf HEADER "#define NOTIFY_TZ 1\n";
		} else {
			printf HEADER "/* #undef NOTIFY_TZ */\n";
		}

		if (defined($features{"FEATURE_NO_LIBCRASHREPORTERCLIENT"})) {
			printf HEADER "#define LIBC_NO_LIBCRASHREPORTERCLIENT 1\n";
		} else {
			printf HEADER "/* #undef LIBC_NO_LIBCRASHREPORTERCLIENT */\n";
		}

		if (defined($features{"FEATURE_SMALL_STDIOBUF"})) {
			printf HEADER "#define FEATURE_SMALL_STDIOBUF 1\n";
		} else {
			printf HEADER "/* #undef FEATURE_SMALL_STDIOBUF */\n";
		}

		if (defined($features{"FEATURE_XPRINTF_PERF"})) {
			printf HEADER "#define XPRINTF_PERF 1\n";
		} else {
			printf HEADER "/* #undef XPRINTF_PERF */\n";
		}

		printf HEADER "#endif // _LIBC_FEATURES_H_\n";
		close HEADER;
	}
}
	
exit 0;
Commit	Line	Data
ad3c9f2a A	1	#!/usr/bin/perl
	2
	3	if ($ENV{"ACTION"} eq "installhdrs") {
	4	exit 0;
	5	}
	6
	7	# Generates the libc-features.h files used to control #ifdef behaviour in Libc
	8	use warnings;
	9	use Data::Dumper;
	10	use File::Path qw(mkpath);
	11
	12	#printf Dumper(\%ENV);
	13
	14	my $unifdef = 0;
	15	my %unifdefs = ();
	16	my $bash = 0;
	17	if (scalar(@ARGV) > 0) {
	18	$unifdef = 1 if $ARGV[0] =~ /--unifdef/;
	19	$bash = 1 if $ARGV[0] =~ /--bash/;
	20	}
	21
	22	for my $arch (split(/ /, $ENV{"ARCHS"}))
	23	{
	24	# set ENV{"CURRENT_ARCH"} so we can predicate on it
	25	$ENV{"CURRENT_ARCH"} = $arch;
	26
	27	my $platformName = $ENV{"PLATFORM_NAME"};
23e20b00	28	$platformName =~ s/simulator/os/;
ad3c9f2a A	29
	30	my $platformPath = $ENV{"SRCROOT"} . "/Platforms/" . $platformName . "/Makefile.inc";
	31	my $featuresHeaderDir = $ENV{"DERIVED_FILES_DIR"}."/".$arch;
	32	my $featuresHeader = $featuresHeaderDir."/libc-features.h";
	33
	34	open FEATURESFILE, "<$platformPath" or die "Unable to open: $platformPath";
	35
	36	my %features = ();
	37	my $skip = 0;
	38	my $nested = 0;
	39
	40	while (<FEATURESFILE>) {
	41	next if $_ =~ /\s*#/;
	42
	43	if ($_ =~ /^.endif/) {
	44	$skip-- if $skip > 0;
	45	$nested--;
	46	}
	47
	48	elsif ($_ =~ /^\.if\s+(\S+)\s+(\S+)/) {
	49	# an if statement, very rudimentary regex against envvar
	50	my $envvar = $1;
	51	my $regex = $2;
	52
	53	$nested++;
6465356a	54	if (!defined($ENV{$envvar}) \|\| ($ENV{$envvar} !~ /$regex/)) {
ad3c9f2a A	55	$skip += 1;
	56	}
	57	}
	58
	59	elsif ($_ =~ /^\s([^= ]+)\s=\s*(\d)/) {
	60	if ($skip == 0) {
	61	if ($2 == 1) {
	62	$features{$1} = $2;
	63	} elsif (defined($features{$1})) {
	64	delete $features{$1};
	65	}
	66	}
	67	}
	68	}
	69
	70	close FEATURESFILE;
	71
	72	if ($bash == 1) {
	73	for my $f (keys %features) {
	74	print "$f=$features{$f} ";
	75	}
	76	printf "\n";
	77	exit 0;
	78	}
	79
	80	elsif ($unifdef == 1) {
6465356a A	81	if ($platformName eq "macosx") {
	82	$unifdefs{"__OSX_OPEN_SOURCE__"} = 1;
	83	}
ad3c9f2a A	84	# assume FEATURE_BLOCKS was on by default
	85	$unifdefs{"UNIFDEF_BLOCKS"} = 1;
	86	$unifdefs{"UNIFDEF_LEGACY_64_APIS"} = defined($features{"FEATURE_LEGACY_64_APIS"});
	87	$unifdefs{"UNIFDEF_LEGACY_RUNE_APIS"} = defined($features{"FEATURE_LEGACY_RUNE_APIS"});
	88	$unifdefs{"UNIFDEF_LEGACY_UTMP_APIS"} = defined($features{"FEATURE_LEGACY_UTMP_APIS"});
	89	$unifdefs{"UNIFDEF_MOVE_LOCALTIME"} = defined($features{"FEATURE_MOVE_LOCALTIME"});
6465356a	90	$unifdefs{"UNIFDEF_TZDIR_SYMLINK"} = defined($features{"FEATURE_TZDIR_SYMLINK"});
ad3c9f2a A	91
	92	my $output = "";
	93	for my $d (keys %unifdefs) {
	94	$output .= " " . ($unifdefs{$d} == 1 ? "-D" : "-U") . $d;
	95	}
	96
	97	chomp $output;
	98	print "$output\n";
	99	exit 0;
	100	}
	101
	102	elsif ($unifdef == 0) {
	103	# If we touch this file on every build, then every other iterative build in Xcode will rebuild everything
	104	my $platform_mtime = (stat($platformPath))[9];
	105	my $header_mtime = (stat($featuresHeader))[9];
	106
6465356a	107	if (defined($header_mtime) && defined($platform_mtime) && ($header_mtime > $platform_mtime)) {
ad3c9f2a A	108	exit 0;
	109	}
	110
	111	printf $arch." features:\n";
	112	printf Dumper(\%features);
	113
	114	if ($nested != 0) {
	115	die "Unbalanced .if/.endif directive";
	116	}
	117
	118	# And the meat, new header options should go under here
	119	if (! -d $featuresHeaderDir) {
	120	mkpath $featuresHeaderDir or die "Unable to mkdir: $featuresHeaderDir";
	121	}
	122	open HEADER, ">$featuresHeader" or die "Unable to open (for writing): $featuresHeader";
	123
	124	printf HEADER "#ifndef _LIBC_FEATURES_H_\n";
	125	printf HEADER "#define _LIBC_FEATURES_H_\n\n";
	126
	127	my $shortarch = $arch;
	128	$shortarch =~ s/armv\d+[a-z]?/arm/g;
	129
	130	printf HEADER "#if !defined(__".$shortarch."__)\n";
	131	printf HEADER "#error Mismatched libc-features.h architecture\n";
	132	printf HEADER "#endif\n\n";
	133
	134	if (defined($features{"FEATURE_LEGACY_RUNE_APIS"})) {
	135	printf HEADER "#define UNIFDEF_LEGACY_RUNE_APIS 1\n";
	136	} else {
	137	printf HEADER "/* #undef UNIFDEF_LEGACY_RUNE_APIS */\n";
	138	}
	139
	140	if (defined($features{"FEATURE_LEGACY_CRT1_ENVIRON"})) {
	141	printf HEADER "#define LEGACY_CRT1_ENVIRON 1\n";
	142	} else {
	143	printf HEADER "/* #undef LEGACY_CRT1_ENVIRON */\n";
	144	}
	145
	146	if (defined($features{"FEATURE_LEGACY_UTMP_APIS"})) {
	147	printf HEADER "#define UNIFDEF_LEGACY_UTMP_APIS 1\n";
	148	} else {
	149	printf HEADER "/* #undef UNIFDEF_LEGACY_UTMP_APIS */\n";
	150	}
	151
	152	if (defined($features{"FEATURE_MOVE_LOCALTIME"})) {
	153	printf HEADER "#define UNIFDEF_MOVE_LOCALTIME 1\n";
	154	} else {
	155	printf HEADER "/* #undef UNIFDEF_MOVE_LOCALTIME */\n";
	156	}
	157
6465356a A	158	if (defined($features{"FEATURE_TZDIR_SYMLINK"})) {
	159	printf HEADER "#define UNIFDEF_TZDIR_SYMLINK 1\n";
	160	} else {
	161	printf HEADER "/* #undef UNIFDEF_TZDIR_SYMLINK */\n";
	162	}
	163
ad3c9f2a A	164	if (defined($features{"FEATURE_ONLY_1050_VARIANTS"})) {
	165	printf HEADER "#if !__DARWIN_ONLY_VERS_1050\n";
	166	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_VERS_1050 == 0\n";
	167	printf HEADER "#endif /* !__DARWIN_ONLY_VERS_1050 */\n";
	168	} else {
	169	printf HEADER "#if __DARWIN_ONLY_VERS_1050\n";
	170	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_VERS_1050 == 1\n";
	171	printf HEADER "#endif /* __DARWIN_ONLY_VERS_1050 */\n";
	172	}
	173
	174	if (defined($features{"FEATURE_ONLY_UNIX_CONFORMANCE"})) {
	175	printf HEADER "#if !__DARWIN_ONLY_UNIX_CONFORMANCE\n";
	176	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_UNIX_CONFORMANCE == 0\n";
	177	printf HEADER "#endif /* !__DARWIN_ONLY_UNIX_CONFORMANCE */\n";
	178	} else {
	179	printf HEADER "#if __DARWIN_ONLY_UNIX_CONFORMANCE\n";
	180	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_UNIX_CONFORMANCE == 1\n";
	181	printf HEADER "#endif /* __DARWIN_ONLY_UNIX_CONFORMANCE */\n";
	182	}
	183
	184	if (defined($features{"FEATURE_ONLY_64_BIT_INO_T"})) {
	185	printf HEADER "#if !__DARWIN_ONLY_64_BIT_INO_T\n";
	186	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_64_BIT_INO_T == 0\n";
	187	printf HEADER "#endif /* !__DARWIN_ONLY_64_BIT_INO_T */\n";
	188	} else {
	189	printf HEADER "#if __DARWIN_ONLY_64_BIT_INO_T\n";
	190	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_64_BIT_INO_T == 1\n";
	191	printf HEADER "#endif /* __DARWIN_ONLY_64_BIT_INO_T */\n";
	192	}
	193
	194	if (defined($features{"FEATURE_PATCH_3417676"})) {
	195	printf HEADER "#define __APPLE_PR3417676_HACK__ 1\n";
	196	} else {
	197	printf HEADER "/* #undef __APPLE_PR3417676_HACK__ */\n";
	198	}
	199
ad3c9f2a A	200	if (defined($features{"FEATURE_PLOCKSTAT"})) {
	201	printf HEADER "#define PLOCKSTAT 1\n";
	202	} else {
	203	printf HEADER "/* #undef PLOCKSTAT */\n";
	204	}
	205
	206	if (defined($features{"FEATURE_TIMEZONE_CHANGE_NOTIFICATION"})) {
	207	printf HEADER "#define NOTIFY_TZ 1\n";
	208	} else {
	209	printf HEADER "/* #undef NOTIFY_TZ */\n";
	210	}
	211
	212	if (defined($features{"FEATURE_NO_LIBCRASHREPORTERCLIENT"})) {
	213	printf HEADER "#define LIBC_NO_LIBCRASHREPORTERCLIENT 1\n";
	214	} else {
	215	printf HEADER "/* #undef LIBC_NO_LIBCRASHREPORTERCLIENT */\n";
	216	}
	217
6465356a A	218	if (defined($features{"FEATURE_SMALL_STDIOBUF"})) {
	219	printf HEADER "#define FEATURE_SMALL_STDIOBUF 1\n";
	220	} else {
	221	printf HEADER "/* #undef FEATURE_SMALL_STDIOBUF */\n";
	222	}
	223
	224	if (defined($features{"FEATURE_XPRINTF_PERF"})) {
	225	printf HEADER "#define XPRINTF_PERF 1\n";
ad3c9f2a	226	} else {
6465356a	227	printf HEADER "/* #undef XPRINTF_PERF */\n";
ad3c9f2a A	228	}
	229
	230	printf HEADER "#endif // _LIBC_FEATURES_H_\n";
	231	close HEADER;
	232	}
	233	}
	234
	235	exit 0;