[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/;

	# Try to find a platform+arch config file. If not found, try just
	# a platform config file.
	my $platformArchPath = $ENV{"SRCROOT"} . "/Platforms/" . $platformName . "/Makefile." . $arch . ".inc";
	my $platformPath = $ENV{"SRCROOT"} . "/Platforms/" . $platformName . "/Makefile.inc";

	my $featuresHeaderDir = $ENV{"DERIVED_FILES_DIR"}."/".$arch;
	my $featuresHeader = $featuresHeaderDir."/libc-features.h";

	open FEATURESFILE, "<$platformArchPath" or open FEATURESFILE, "<$platformPath" or die "Unable to open: $platformArchPath nor $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;
		$unifdefs{"UNIFDEF_DRIVERKIT"} = defined($ENV{"DRIVERKITSDK"});
		$unifdefs{"UNIFDEF_LEGACY_64_APIS"} = defined($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"});
		$unifdefs{"UNIFDEF_POSIX_ILP32_ALLOW"} = defined($features{"FEATURE_POSIX_ILP32_ALLOW"});
		
		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 $platform_mtime = (stat($platformArchPath))[9];
		if (!defined($platform_mtime)) {
			# try the other one
			$platform_mtime = (stat($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	25
a9aaacca A	26	# Try to find a platform+arch config file. If not found, try just
	27	# a platform config file.
	28	my $platformArchPath = $ENV{"SRCROOT"} . "/Platforms/" . $platformName . "/Makefile." . $arch . ".inc";
ad3c9f2a	29	my $platformPath = $ENV{"SRCROOT"} . "/Platforms/" . $platformName . "/Makefile.inc";
a9aaacca	30
ad3c9f2a A	31	my $featuresHeaderDir = $ENV{"DERIVED_FILES_DIR"}."/".$arch;
	32	my $featuresHeader = $featuresHeaderDir."/libc-features.h";
	33
a9aaacca	34	open FEATURESFILE, "<$platformArchPath" or open FEATURESFILE, "<$platformPath" or die "Unable to open: $platformArchPath nor $platformPath";
ad3c9f2a A	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) {
	81	# assume FEATURE_BLOCKS was on by default
	82	$unifdefs{"UNIFDEF_BLOCKS"} = 1;
507116e3	83	$unifdefs{"UNIFDEF_DRIVERKIT"} = defined($ENV{"DRIVERKITSDK"});
ad3c9f2a A	84	$unifdefs{"UNIFDEF_LEGACY_64_APIS"} = defined($features{"FEATURE_LEGACY_64_APIS"});
	85	$unifdefs{"UNIFDEF_LEGACY_RUNE_APIS"} = defined($features{"FEATURE_LEGACY_RUNE_APIS"});
	86	$unifdefs{"UNIFDEF_LEGACY_UTMP_APIS"} = defined($features{"FEATURE_LEGACY_UTMP_APIS"});
507116e3	87	$unifdefs{"UNIFDEF_POSIX_ILP32_ALLOW"} = defined($features{"FEATURE_POSIX_ILP32_ALLOW"});
ad3c9f2a A	88
	89	my $output = "";
	90	for my $d (keys %unifdefs) {
	91	$output .= " " . ($unifdefs{$d} == 1 ? "-D" : "-U") . $d;
	92	}
	93
	94	chomp $output;
	95	print "$output\n";
	96	exit 0;
	97	}
	98
	99	elsif ($unifdef == 0) {
	100	# If we touch this file on every build, then every other iterative build in Xcode will rebuild everything
a9aaacca A	101	my $platform_mtime = (stat($platformArchPath))[9];
	102	if (!defined($platform_mtime)) {
	103	# try the other one
	104	$platform_mtime = (stat($platformPath))[9];
	105	}
ad3c9f2a A	106	my $header_mtime = (stat($featuresHeader))[9];
ad3c9f2a A	107
6465356a	108	if (defined($header_mtime) && defined($platform_mtime) && ($header_mtime > $platform_mtime)) {
ad3c9f2a A	109	exit 0;
	110	}
	111
	112	printf $arch." features:\n";
	113	printf Dumper(\%features);
	114
	115	if ($nested != 0) {
	116	die "Unbalanced .if/.endif directive";
	117	}
	118
	119	# And the meat, new header options should go under here
	120	if (! -d $featuresHeaderDir) {
	121	mkpath $featuresHeaderDir or die "Unable to mkdir: $featuresHeaderDir";
	122	}
	123	open HEADER, ">$featuresHeader" or die "Unable to open (for writing): $featuresHeader";
	124
	125	printf HEADER "#ifndef _LIBC_FEATURES_H_\n";
	126	printf HEADER "#define _LIBC_FEATURES_H_\n\n";
	127
	128	my $shortarch = $arch;
	129	$shortarch =~ s/armv\d+[a-z]?/arm/g;
b061a43b A	130
b061a43b A	131	# map all arm64 subtypes to arm64
70ad1dc8	132	$shortarch =~ s/arm64[_a-z0-9]*/arm64/g;
ad3c9f2a A	133
	134	printf HEADER "#if !defined(__".$shortarch."__)\n";
	135	printf HEADER "#error Mismatched libc-features.h architecture\n";
	136	printf HEADER "#endif\n\n";
	137
	138	if (defined($features{"FEATURE_LEGACY_RUNE_APIS"})) {
	139	printf HEADER "#define UNIFDEF_LEGACY_RUNE_APIS 1\n";
	140	} else {
	141	printf HEADER "/* #undef UNIFDEF_LEGACY_RUNE_APIS */\n";
	142	}
	143
	144	if (defined($features{"FEATURE_LEGACY_CRT1_ENVIRON"})) {
	145	printf HEADER "#define LEGACY_CRT1_ENVIRON 1\n";
	146	} else {
	147	printf HEADER "/* #undef LEGACY_CRT1_ENVIRON */\n";
	148	}
	149
	150	if (defined($features{"FEATURE_LEGACY_UTMP_APIS"})) {
	151	printf HEADER "#define UNIFDEF_LEGACY_UTMP_APIS 1\n";
	152	} else {
	153	printf HEADER "/* #undef UNIFDEF_LEGACY_UTMP_APIS */\n";
	154	}
	155
ad3c9f2a A	156	if (defined($features{"FEATURE_ONLY_1050_VARIANTS"})) {
	157	printf HEADER "#if !__DARWIN_ONLY_VERS_1050\n";
	158	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_VERS_1050 == 0\n";
	159	printf HEADER "#endif /* !__DARWIN_ONLY_VERS_1050 */\n";
	160	} else {
	161	printf HEADER "#if __DARWIN_ONLY_VERS_1050\n";
	162	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_VERS_1050 == 1\n";
	163	printf HEADER "#endif /* __DARWIN_ONLY_VERS_1050 */\n";
	164	}
	165
	166	if (defined($features{"FEATURE_ONLY_UNIX_CONFORMANCE"})) {
	167	printf HEADER "#if !__DARWIN_ONLY_UNIX_CONFORMANCE\n";
	168	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_UNIX_CONFORMANCE == 0\n";
	169	printf HEADER "#endif /* !__DARWIN_ONLY_UNIX_CONFORMANCE */\n";
	170	} else {
	171	printf HEADER "#if __DARWIN_ONLY_UNIX_CONFORMANCE\n";
	172	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_UNIX_CONFORMANCE == 1\n";
	173	printf HEADER "#endif /* __DARWIN_ONLY_UNIX_CONFORMANCE */\n";
	174	}
	175
	176	if (defined($features{"FEATURE_ONLY_64_BIT_INO_T"})) {
	177	printf HEADER "#if !__DARWIN_ONLY_64_BIT_INO_T\n";
	178	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_64_BIT_INO_T == 0\n";
	179	printf HEADER "#endif /* !__DARWIN_ONLY_64_BIT_INO_T */\n";
	180	} else {
	181	printf HEADER "#if __DARWIN_ONLY_64_BIT_INO_T\n";
	182	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_64_BIT_INO_T == 1\n";
	183	printf HEADER "#endif /* __DARWIN_ONLY_64_BIT_INO_T */\n";
	184	}
	185
	186	if (defined($features{"FEATURE_PATCH_3417676"})) {
	187	printf HEADER "#define __APPLE_PR3417676_HACK__ 1\n";
	188	} else {
	189	printf HEADER "/* #undef __APPLE_PR3417676_HACK__ */\n";
	190	}
	191
ad3c9f2a A	192	if (defined($features{"FEATURE_PLOCKSTAT"})) {
	193	printf HEADER "#define PLOCKSTAT 1\n";
	194	} else {
	195	printf HEADER "/* #undef PLOCKSTAT */\n";
	196	}
	197
	198	if (defined($features{"FEATURE_TIMEZONE_CHANGE_NOTIFICATION"})) {
	199	printf HEADER "#define NOTIFY_TZ 1\n";
	200	} else {
	201	printf HEADER "/* #undef NOTIFY_TZ */\n";
	202	}
	203
6465356a A	204	if (defined($features{"FEATURE_SMALL_STDIOBUF"})) {
	205	printf HEADER "#define FEATURE_SMALL_STDIOBUF 1\n";
	206	} else {
	207	printf HEADER "/* #undef FEATURE_SMALL_STDIOBUF */\n";
	208	}
	209
	210	if (defined($features{"FEATURE_XPRINTF_PERF"})) {
	211	printf HEADER "#define XPRINTF_PERF 1\n";
ad3c9f2a	212	} else {
6465356a	213	printf HEADER "/* #undef XPRINTF_PERF */\n";
ad3c9f2a A	214	}
ad3c9f2a A	215
5f125488 A	216	if (defined($features{"FEATURE_SIGNAL_RESTRICTION"})) {
	217	printf HEADER "#define FEATURE_SIGNAL_RESTRICTION 1\n";
	218	} else {
	219	printf HEADER "/* #undef FEATURE_SIGNAL_RESTRICTION */\n";
	220	}
	221
ad3c9f2a A	222	printf HEADER "#endif // _LIBC_FEATURES_H_\n";
	223	close HEADER;
	224	}
	225	}
	226
	227	exit 0;