xcodescripts/generate_features.pl

   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"};
  28         $platformName = "iphoneos" if ($platformName eq "iphonesimulator");
  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                         $nested++;
  54                         if ($ENV{$envvar} !~ /$regex/) {
  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;
  83                 $unifdefs{"UNIFDEF_LEGACY_64_APIS"} = defined($features{"FEATURE_LEGACY_64_APIS"});
  84                 $unifdefs{"UNIFDEF_LEGACY_RUNE_APIS"} = defined($features{"FEATURE_LEGACY_RUNE_APIS"});
  85                 $unifdefs{"UNIFDEF_LEGACY_UTMP_APIS"} = defined($features{"FEATURE_LEGACY_UTMP_APIS"});
  86                 $unifdefs{"UNIFDEF_MOVE_LOCALTIME"} = defined($features{"FEATURE_MOVE_LOCALTIME"});
  87
  88                 my $output = "";
  89                 for my $d (keys %unifdefs) {
  90                         $output .= " " . ($unifdefs{$d} == 1 ? "-D" : "-U") . $d;
  91                 }
  92
  93                 chomp $output;
  94                 print "$output\n";
  95                 exit 0;
  96         }
  97
  98         elsif ($unifdef == 0) {
  99                 # If we touch this file on every build, then every other iterative build in Xcode will rebuild *everything*
 100                 my $platform_mtime = (stat($platformPath))[9];
 101                 my $header_mtime = (stat($featuresHeader))[9];
 102
 103                 if ($header_mtime > $platform_mtime) {
 104                         exit 0;
 105                 }
 106
 107                 printf $arch." features:\n";
 108                 printf Dumper(\%features);
 109
 110                 if ($nested != 0) {
 111                         die "Unbalanced .if/.endif directive";
 112                 }
 113
 114                 # And the meat, new header options should go under here
 115                 if (! -d $featuresHeaderDir) {
 116                         mkpath $featuresHeaderDir or die "Unable to mkdir: $featuresHeaderDir";
 117                 }
 118                 open HEADER, ">$featuresHeader" or die "Unable to open (for writing): $featuresHeader";
 119
 120                 printf HEADER "#ifndef _LIBC_FEATURES_H_\n";
 121                 printf HEADER "#define _LIBC_FEATURES_H_\n\n";
 122
 123                 my $shortarch = $arch;
 124                 $shortarch =~ s/armv\d+[a-z]?/arm/g;
 125
 126                 printf HEADER "#if !defined(__".$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($features{"FEATURE_LEGACY_UTMP_APIS"})) {
 143                         printf HEADER "#define UNIFDEF_LEGACY_UTMP_APIS 1\n";
 144                 } else {
 145                         printf HEADER "/* #undef UNIFDEF_LEGACY_UTMP_APIS */\n";
 146                 }
 147
 148                 if (defined($features{"FEATURE_MOVE_LOCALTIME"})) {
 149                         printf HEADER "#define UNIFDEF_MOVE_LOCALTIME 1\n";
 150                 } else {
 151                         printf HEADER "/* #undef UNIFDEF_MOVE_LOCALTIME */\n";
 152                 }
 153
 154                 if (defined($features{"FEATURE_ONLY_1050_VARIANTS"})) {
 155                         printf HEADER "#if !__DARWIN_ONLY_VERS_1050\n";
 156                         printf HEADER "#  error Feature mismatch: __DARWIN_ONLY_VERS_1050 == 0\n";
 157                         printf HEADER "#endif /* !__DARWIN_ONLY_VERS_1050 */\n";
 158                 } else {
 159                         printf HEADER "#if __DARWIN_ONLY_VERS_1050\n";
 160                         printf HEADER "#  error Feature mismatch: __DARWIN_ONLY_VERS_1050 == 1\n";
 161                         printf HEADER "#endif /* __DARWIN_ONLY_VERS_1050 */\n";
 162                 }
 163
 164                 if (defined($features{"FEATURE_ONLY_UNIX_CONFORMANCE"})) {
 165                         printf HEADER "#if !__DARWIN_ONLY_UNIX_CONFORMANCE\n";
 166                         printf HEADER "#  error Feature mismatch: __DARWIN_ONLY_UNIX_CONFORMANCE == 0\n";
 167                         printf HEADER "#endif /* !__DARWIN_ONLY_UNIX_CONFORMANCE */\n";
 168                 } else {
 169                         printf HEADER "#if __DARWIN_ONLY_UNIX_CONFORMANCE\n";
 170                         printf HEADER "#  error Feature mismatch: __DARWIN_ONLY_UNIX_CONFORMANCE == 1\n";
 171                         printf HEADER "#endif /* __DARWIN_ONLY_UNIX_CONFORMANCE */\n";
 172                 }
 173
 174                 if (defined($features{"FEATURE_ONLY_64_BIT_INO_T"})) {
 175                         printf HEADER "#if !__DARWIN_ONLY_64_BIT_INO_T\n";
 176                         printf HEADER "#  error Feature mismatch: __DARWIN_ONLY_64_BIT_INO_T == 0\n";
 177                         printf HEADER "#endif /* !__DARWIN_ONLY_64_BIT_INO_T */\n";
 178                 } else {
 179                         printf HEADER "#if __DARWIN_ONLY_64_BIT_INO_T\n";
 180                         printf HEADER "#  error Feature mismatch: __DARWIN_ONLY_64_BIT_INO_T == 1\n";
 181                         printf HEADER "#endif /* __DARWIN_ONLY_64_BIT_INO_T */\n";
 182                 }
 183
 184                 if (defined($features{"FEATURE_PATCH_3417676"})) {
 185                         printf HEADER "#define __APPLE_PR3417676_HACK__ 1\n";
 186                 } else {
 187                         printf HEADER "/* #undef __APPLE_PR3417676_HACK__ */\n";
 188                 }
 189
 190                 if (defined($features{"FEATURE_PATCH_5243343"})) {
 191                         printf HEADER "#define PR_5243343 1\n";
 192                 } else {
 193                         printf HEADER "/* #undef PR_5243343 */\n";
 194                 }
 195
 196                 if (defined($features{"FEATURE_PLOCKSTAT"})) {
 197                         printf HEADER "#define PLOCKSTAT 1\n";
 198                 } else {
 199                         printf HEADER "/* #undef PLOCKSTAT */\n";
 200                 }
 201
 202                 if (defined($features{"FEATURE_TIMEZONE_CHANGE_NOTIFICATION"})) {
 203                         printf HEADER "#define NOTIFY_TZ 1\n";
 204                 } else {
 205                         printf HEADER "/* #undef NOTIFY_TZ */\n";
 206                 }
 207
 208                 if (defined($features{"FEATURE_NO_LIBCRASHREPORTERCLIENT"})) {
 209                         printf HEADER "#define LIBC_NO_LIBCRASHREPORTERCLIENT 1\n";
 210                 } else {
 211                         printf HEADER "/* #undef LIBC_NO_LIBCRASHREPORTERCLIENT */\n";
 212                 }
 213
 214                 if (defined($features{"FEATURE_MEMORYSTATUS"})) {
 215                         printf HEADER "#define CONFIG_MEMORYSTATUS 1\n";
 216                 } else {
 217                         printf HEADER "/* #undef CONFIG_MEMORYSTATUS */\n";
 218                 }
 219
 220                 printf HEADER "#endif // _LIBC_FEATURES_H_\n";
 221                 close HEADER;
 222         }
 223 }
 224
 225 exit 0;