[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;
		$unifdefs{"UNIFDEF_DRIVERKIT"} = defined($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 $platform_mtime = (stat($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;
507116e3	79	$unifdefs{"UNIFDEF_DRIVERKIT"} = defined($ENV{"DRIVERKITSDK"});
ad3c9f2a A	80	$unifdefs{"UNIFDEF_LEGACY_64_APIS"} = defined($features{"FEATURE_LEGACY_64_APIS"});
	81	$unifdefs{"UNIFDEF_LEGACY_RUNE_APIS"} = defined($features{"FEATURE_LEGACY_RUNE_APIS"});
	82	$unifdefs{"UNIFDEF_LEGACY_UTMP_APIS"} = defined($features{"FEATURE_LEGACY_UTMP_APIS"});
507116e3	83	$unifdefs{"UNIFDEF_POSIX_ILP32_ALLOW"} = defined($features{"FEATURE_POSIX_ILP32_ALLOW"});
ad3c9f2a A	84
	85	my $output = "";
	86	for my $d (keys %unifdefs) {
	87	$output .= " " . ($unifdefs{$d} == 1 ? "-D" : "-U") . $d;
	88	}
	89
	90	chomp $output;
	91	print "$output\n";
	92	exit 0;
	93	}
	94
	95	elsif ($unifdef == 0) {
	96	# If we touch this file on every build, then every other iterative build in Xcode will rebuild everything
	97	my $platform_mtime = (stat($platformPath))[9];
	98	my $header_mtime = (stat($featuresHeader))[9];
	99
6465356a	100	if (defined($header_mtime) && defined($platform_mtime) && ($header_mtime > $platform_mtime)) {
ad3c9f2a A	101	exit 0;
	102	}
	103
	104	printf $arch." features:\n";
	105	printf Dumper(\%features);
	106
	107	if ($nested != 0) {
	108	die "Unbalanced .if/.endif directive";
	109	}
	110
	111	# And the meat, new header options should go under here
	112	if (! -d $featuresHeaderDir) {
	113	mkpath $featuresHeaderDir or die "Unable to mkdir: $featuresHeaderDir";
	114	}
	115	open HEADER, ">$featuresHeader" or die "Unable to open (for writing): $featuresHeader";
	116
	117	printf HEADER "#ifndef _LIBC_FEATURES_H_\n";
	118	printf HEADER "#define _LIBC_FEATURES_H_\n\n";
	119
	120	my $shortarch = $arch;
	121	$shortarch =~ s/armv\d+[a-z]?/arm/g;
b061a43b A	122
b061a43b A	123	# map all arm64 subtypes to arm64
70ad1dc8	124	$shortarch =~ s/arm64[_a-z0-9]*/arm64/g;
ad3c9f2a A	125
	126	printf HEADER "#if !defined(__".$shortarch."__)\n";
	127	printf HEADER "#error Mismatched libc-features.h architecture\n";
	128	printf HEADER "#endif\n\n";
	129
	130	if (defined($features{"FEATURE_LEGACY_RUNE_APIS"})) {
	131	printf HEADER "#define UNIFDEF_LEGACY_RUNE_APIS 1\n";
	132	} else {
	133	printf HEADER "/* #undef UNIFDEF_LEGACY_RUNE_APIS */\n";
	134	}
	135
	136	if (defined($features{"FEATURE_LEGACY_CRT1_ENVIRON"})) {
	137	printf HEADER "#define LEGACY_CRT1_ENVIRON 1\n";
	138	} else {
	139	printf HEADER "/* #undef LEGACY_CRT1_ENVIRON */\n";
	140	}
	141
	142	if (defined($features{"FEATURE_LEGACY_UTMP_APIS"})) {
	143	printf HEADER "#define UNIFDEF_LEGACY_UTMP_APIS 1\n";
	144	} else {
	145	printf HEADER "/* #undef UNIFDEF_LEGACY_UTMP_APIS */\n";
	146	}
	147
ad3c9f2a A	148	if (defined($features{"FEATURE_ONLY_1050_VARIANTS"})) {
	149	printf HEADER "#if !__DARWIN_ONLY_VERS_1050\n";
	150	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_VERS_1050 == 0\n";
	151	printf HEADER "#endif /* !__DARWIN_ONLY_VERS_1050 */\n";
	152	} else {
	153	printf HEADER "#if __DARWIN_ONLY_VERS_1050\n";
	154	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_VERS_1050 == 1\n";
	155	printf HEADER "#endif /* __DARWIN_ONLY_VERS_1050 */\n";
	156	}
	157
	158	if (defined($features{"FEATURE_ONLY_UNIX_CONFORMANCE"})) {
	159	printf HEADER "#if !__DARWIN_ONLY_UNIX_CONFORMANCE\n";
	160	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_UNIX_CONFORMANCE == 0\n";
	161	printf HEADER "#endif /* !__DARWIN_ONLY_UNIX_CONFORMANCE */\n";
	162	} else {
	163	printf HEADER "#if __DARWIN_ONLY_UNIX_CONFORMANCE\n";
	164	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_UNIX_CONFORMANCE == 1\n";
	165	printf HEADER "#endif /* __DARWIN_ONLY_UNIX_CONFORMANCE */\n";
	166	}
	167
	168	if (defined($features{"FEATURE_ONLY_64_BIT_INO_T"})) {
	169	printf HEADER "#if !__DARWIN_ONLY_64_BIT_INO_T\n";
	170	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_64_BIT_INO_T == 0\n";
	171	printf HEADER "#endif /* !__DARWIN_ONLY_64_BIT_INO_T */\n";
	172	} else {
	173	printf HEADER "#if __DARWIN_ONLY_64_BIT_INO_T\n";
	174	printf HEADER "# error Feature mismatch: __DARWIN_ONLY_64_BIT_INO_T == 1\n";
	175	printf HEADER "#endif /* __DARWIN_ONLY_64_BIT_INO_T */\n";
	176	}
	177
	178	if (defined($features{"FEATURE_PATCH_3417676"})) {
	179	printf HEADER "#define __APPLE_PR3417676_HACK__ 1\n";
	180	} else {
	181	printf HEADER "/* #undef __APPLE_PR3417676_HACK__ */\n";
	182	}
	183
ad3c9f2a A	184	if (defined($features{"FEATURE_PLOCKSTAT"})) {
	185	printf HEADER "#define PLOCKSTAT 1\n";
	186	} else {
	187	printf HEADER "/* #undef PLOCKSTAT */\n";
	188	}
	189
	190	if (defined($features{"FEATURE_TIMEZONE_CHANGE_NOTIFICATION"})) {
	191	printf HEADER "#define NOTIFY_TZ 1\n";
	192	} else {
	193	printf HEADER "/* #undef NOTIFY_TZ */\n";
	194	}
	195
6465356a A	196	if (defined($features{"FEATURE_SMALL_STDIOBUF"})) {
	197	printf HEADER "#define FEATURE_SMALL_STDIOBUF 1\n";
	198	} else {
	199	printf HEADER "/* #undef FEATURE_SMALL_STDIOBUF */\n";
	200	}
	201
	202	if (defined($features{"FEATURE_XPRINTF_PERF"})) {
	203	printf HEADER "#define XPRINTF_PERF 1\n";
ad3c9f2a	204	} else {
6465356a	205	printf HEADER "/* #undef XPRINTF_PERF */\n";
ad3c9f2a A	206	}
ad3c9f2a A	207
5f125488 A	208	if (defined($features{"FEATURE_SIGNAL_RESTRICTION"})) {
	209	printf HEADER "#define FEATURE_SIGNAL_RESTRICTION 1\n";
	210	} else {
	211	printf HEADER "/* #undef FEATURE_SIGNAL_RESTRICTION */\n";
	212	}
	213
ad3c9f2a A	214	printf HEADER "#endif // _LIBC_FEATURES_H_\n";
	215	close HEADER;
	216	}
	217	}
	218
	219	exit 0;