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

#!/usr/bin/perl

# 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{"VARIANT_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) {
		# 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"});
		
		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;

		# map all arm64 subtypes to arm64
		$shortarch =~ s/arm64[_a-z0-9]*/arm64/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_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_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";
		}

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

		printf HEADER "#endif // _LIBC_FEATURES_H_\n";
		close HEADER;
	}
}
	
exit 0;
Commit	Line	Data
ad3c9f2a A	1	#!/usr/bin/perl
ad3c9f2a A	2
ad3c9f2a A	3	# Generates the libc-features.h files used to control #ifdef behaviour in Libc
	4	use warnings;
	5	use Data::Dumper;
	6	use File::Path qw(mkpath);
	7
	8	#printf Dumper(\%ENV);
	9
	10	my $unifdef = 0;
	11	my %unifdefs = ();
	12	my $bash = 0;
	13	if (scalar(@ARGV) > 0) {
	14	$unifdef = 1 if $ARGV[0] =~ /--unifdef/;
	15	$bash = 1 if $ARGV[0] =~ /--bash/;
	16	}
	17
	18	for my $arch (split(/ /, $ENV{"ARCHS"}))
	19	{
	20	# set ENV{"CURRENT_ARCH"} so we can predicate on it
	21	$ENV{"CURRENT_ARCH"} = $arch;
974e3884	22
70ad1dc8	23	my $platformName = $ENV{"VARIANT_PLATFORM_NAME"};
23e20b00	24	$platformName =~ s/simulator/os/;
ad3c9f2a A	25
	26	my $platformPath = $ENV{"SRCROOT"} . "/Platforms/" . $platformName . "/Makefile.inc";
	27	my $featuresHeaderDir = $ENV{"DERIVED_FILES_DIR"}."/".$arch;
	28	my $featuresHeader = $featuresHeaderDir."/libc-features.h";
	29
	30	open FEATURESFILE, "<$platformPath" or die "Unable to open: $platformPath";
	31
	32	my %features = ();
	33	my $skip = 0;
	34	my $nested = 0;
	35
	36	while (<FEATURESFILE>) {
	37	next if $_ =~ /\s*#/;
	38
	39	if ($_ =~ /^.endif/) {
	40	$skip-- if $skip > 0;
	41	$nested--;
	42	}
	43
	44	elsif ($_ =~ /^\.if\s+(\S+)\s+(\S+)/) {
	45	# an if statement, very rudimentary regex against envvar
	46	my $envvar = $1;
	47	my $regex = $2;
	48
	49	$nested++;
6465356a	50	if (!defined($ENV{$envvar}) \|\| ($ENV{$envvar} !~ /$regex/)) {
ad3c9f2a A	51	$skip += 1;
	52	}
	53	}
	54
	55	elsif ($_ =~ /^\s([^= ]+)\s=\s*(\d)/) {
	56	if ($skip == 0) {
	57	if ($2 == 1) {
	58	$features{$1} = $2;
	59	} elsif (defined($features{$1})) {
	60	delete $features{$1};
	61	}
	62	}
	63	}
	64	}
	65
	66	close FEATURESFILE;
	67
	68	if ($bash == 1) {
	69	for my $f (keys %features) {
	70	print "$f=$features{$f} ";
	71	}
	72	printf "\n";
	73	exit 0;
	74	}
	75
	76	elsif ($unifdef == 1) {
	77	# assume FEATURE_BLOCKS was on by default
	78	$unifdefs{"UNIFDEF_BLOCKS"} = 1;
	79	$unifdefs{"UNIFDEF_LEGACY_64_APIS"} = defined($features{"FEATURE_LEGACY_64_APIS"});
	80	$unifdefs{"UNIFDEF_LEGACY_RUNE_APIS"} = defined($features{"FEATURE_LEGACY_RUNE_APIS"});
	81	$unifdefs{"UNIFDEF_LEGACY_UTMP_APIS"} = defined($features{"FEATURE_LEGACY_UTMP_APIS"});
ad3c9f2a A	82
	83	my $output = "";
	84	for my $d (keys %unifdefs) {
	85	$output .= " " . ($unifdefs{$d} == 1 ? "-D" : "-U") . $d;
	86	}
	87
	88	chomp $output;
	89	print "$output\n";
	90	exit 0;
	91	}
	92
	93	elsif ($unifdef == 0) {
	94	# If we touch this file on every build, then every other iterative build in Xcode will rebuild everything
	95	my $platform_mtime = (stat($platformPath))[9];
	96	my $header_mtime = (stat($featuresHeader))[9];
	97
6465356a	98	if (defined($header_mtime) && defined($platform_mtime) && ($header_mtime > $platform_mtime)) {
ad3c9f2a A	99	exit 0;
	100	}
	101
	102	printf $arch." features:\n";
	103	printf Dumper(\%features);
	104
	105	if ($nested != 0) {
	106	die "Unbalanced .if/.endif directive";
	107	}
	108
	109	# And the meat, new header options should go under here
	110	if (! -d $featuresHeaderDir) {
	111	mkpath $featuresHeaderDir or die "Unable to mkdir: $featuresHeaderDir";
	112	}
	113	open HEADER, ">$featuresHeader" or die "Unable to open (for writing): $featuresHeader";
	114
	115	printf HEADER "#ifndef _LIBC_FEATURES_H_\n";
	116	printf HEADER "#define _LIBC_FEATURES_H_\n\n";
	117
	118	my $shortarch = $arch;
	119	$shortarch =~ s/armv\d+[a-z]?/arm/g;
b061a43b A	120
b061a43b A	121	# map all arm64 subtypes to arm64
70ad1dc8	122	$shortarch =~ s/arm64[_a-z0-9]*/arm64/g;
ad3c9f2a A	123
	124	printf HEADER "#if !defined(__".$shortarch."__)\n";
	125	printf HEADER "#error Mismatched libc-features.h architecture\n";
	126	printf HEADER "#endif\n\n";
	127
	128	if (defined($features{"FEATURE_LEGACY_RUNE_APIS"})) {
	129	printf HEADER "#define UNIFDEF_LEGACY_RUNE_APIS 1\n";
	130	} else {
	131	printf HEADER "/* #undef UNIFDEF_LEGACY_RUNE_APIS */\n";
	132	}
	133
	134	if (defined($features{"FEATURE_LEGACY_CRT1_ENVIRON"})) {
	135	printf HEADER "#define LEGACY_CRT1_ENVIRON 1\n";
	136	} else {
	137	printf HEADER "/* #undef LEGACY_CRT1_ENVIRON */\n";
	138	}
	139
	140	if (defined($features{"FEATURE_LEGACY_UTMP_APIS"})) {
	141	printf HEADER "#define UNIFDEF_LEGACY_UTMP_APIS 1\n";
	142	} else {
	143	printf HEADER "/* #undef UNIFDEF_LEGACY_UTMP_APIS */\n";
	144	}
	145
ad3c9f2a A	146	if (defined($features{"FEATURE_ONLY_1050_VARIANTS"})) {
	147	printf HEADER "#if !__DARWIN_ONLY_VERS_1050\n";
	148	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_VERS_1050 == 0\n";
	149	printf HEADER "#endif /* !__DARWIN_ONLY_VERS_1050 */\n";
	150	} else {
	151	printf HEADER "#if __DARWIN_ONLY_VERS_1050\n";
	152	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_VERS_1050 == 1\n";
	153	printf HEADER "#endif /* __DARWIN_ONLY_VERS_1050 */\n";
	154	}
	155
	156	if (defined($features{"FEATURE_ONLY_UNIX_CONFORMANCE"})) {
	157	printf HEADER "#if !__DARWIN_ONLY_UNIX_CONFORMANCE\n";
	158	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_UNIX_CONFORMANCE == 0\n";
	159	printf HEADER "#endif /* !__DARWIN_ONLY_UNIX_CONFORMANCE */\n";
	160	} else {
	161	printf HEADER "#if __DARWIN_ONLY_UNIX_CONFORMANCE\n";
	162	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_UNIX_CONFORMANCE == 1\n";
	163	printf HEADER "#endif /* __DARWIN_ONLY_UNIX_CONFORMANCE */\n";
	164	}
	165
	166	if (defined($features{"FEATURE_ONLY_64_BIT_INO_T"})) {
	167	printf HEADER "#if !__DARWIN_ONLY_64_BIT_INO_T\n";
	168	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_64_BIT_INO_T == 0\n";
	169	printf HEADER "#endif /* !__DARWIN_ONLY_64_BIT_INO_T */\n";
	170	} else {
	171	printf HEADER "#if __DARWIN_ONLY_64_BIT_INO_T\n";
	172	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_64_BIT_INO_T == 1\n";
	173	printf HEADER "#endif /* __DARWIN_ONLY_64_BIT_INO_T */\n";
	174	}
	175
	176	if (defined($features{"FEATURE_PATCH_3417676"})) {
	177	printf HEADER "#define __APPLE_PR3417676_HACK__ 1\n";
	178	} else {
	179	printf HEADER "/* #undef __APPLE_PR3417676_HACK__ */\n";
	180	}
	181
ad3c9f2a A	182	if (defined($features{"FEATURE_PLOCKSTAT"})) {
	183	printf HEADER "#define PLOCKSTAT 1\n";
	184	} else {
	185	printf HEADER "/* #undef PLOCKSTAT */\n";
	186	}
	187
	188	if (defined($features{"FEATURE_TIMEZONE_CHANGE_NOTIFICATION"})) {
	189	printf HEADER "#define NOTIFY_TZ 1\n";
	190	} else {
	191	printf HEADER "/* #undef NOTIFY_TZ */\n";
	192	}
	193
6465356a A	194	if (defined($features{"FEATURE_SMALL_STDIOBUF"})) {
	195	printf HEADER "#define FEATURE_SMALL_STDIOBUF 1\n";
	196	} else {
	197	printf HEADER "/* #undef FEATURE_SMALL_STDIOBUF */\n";
	198	}
	199
	200	if (defined($features{"FEATURE_XPRINTF_PERF"})) {
	201	printf HEADER "#define XPRINTF_PERF 1\n";
ad3c9f2a	202	} else {
6465356a	203	printf HEADER "/* #undef XPRINTF_PERF */\n";
ad3c9f2a A	204	}
ad3c9f2a A	205
5f125488 A	206	if (defined($features{"FEATURE_SIGNAL_RESTRICTION"})) {
	207	printf HEADER "#define FEATURE_SIGNAL_RESTRICTION 1\n";
	208	} else {
	209	printf HEADER "/* #undef FEATURE_SIGNAL_RESTRICTION */\n";
	210	}
	211
ad3c9f2a A	212	printf HEADER "#endif // _LIBC_FEATURES_H_\n";
	213	close HEADER;
	214	}
	215	}
	216
	217	exit 0;