Cross/generate_config_sh

   1 #!/usr/bin/perl
   2
   3 ##############################################################################
   4 #
   5 #       Ok, so there is this buildsystem that has variables set in shell
   6 #       like this:
   7 #
   8 #       cc='gcc'
   9 #
  10 #       This means we can go
  11 #
  12 #       if test "${AR+set}" != set; then
  13 #               ar='arm-linux-ar'
  14 #       else
  15 #               ar=${AR}
  16 #       fi
  17 #
  18 #       Right??? WRONG!
  19 #
  20 #       Damn perl installation *PARSES* and *PATTERN MATCHES* this file.
  21 #
  22 ##############################################################################
  23
  24 my $config = shift;
  25
  26 my $sys = $ENV{SYS};
  27
  28 my $callbacks = {};
  29 $callbacks->{'ar'} = [\&simple_process, ["AR", "arm-linux-ar"]];
  30 $callbacks->{'archname'} = [\&simple_process, ["SYS", "armv4l-linux"]];
  31 $callbacks->{'cc'} = [\&simple_process, ["CC", "arm-linux-gcc"]];
  32 $callbacks->{'cccdlflags'} = [\&simple_process, ["CFLAGS", ""]];
  33 $callbacks->{'ccdlflags'} = [\&simple_process, ["CFLAGS", ""]];
  34 $callbacks->{'ccflags'} = [\&simple_process, ["CFLAGS", "-fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"]];
  35 $callbacks->{'ccflags_uselargefiles'} = [\&simple_process, ["CFLAGS", "-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"]];
  36 $callbacks->{'ccname'} = [\&simple_process, ["CC", "arm-linux-gcc"]];
  37 $callbacks->{'cpp'} = [\&simple_process, ["CCP", "arm-linux-cpp"]];
  38 $callbacks->{'cppflags'} = [\&simple_process, ["CCPFLAGS", "-fno-strict-aliasing"]];
  39 $callbacks->{'cpprun'} = [\&simple_process_append, ["CC", "arm-linux-gcc -E", "-E"]];
  40 $callbacks->{'cppstdin'} = [\&simple_process_append, ["CC", "arm-linux-gcc -E", "-E"]];
  41 $callbacks->{'full_ar'} = [\&backtick, ["AR", "which $ENV{AR}", "/usr/local/arm/2.95.3/bin/arm-linux-ar"]];
  42 $callbacks->{'ld'} = [\&simple_process, ["LD", "arm-linux-ld"]];
  43 $callbacks->{'ldflags'} = [\&simple_process, ["LDFLAGS", ""]];
  44 $callbacks->{'ldflags_uselargefiles'} = [\&simple_process, ["LDFLAGS", ""]];
  45 $callbacks->{'myarchname'} = [\&simple_process, ["SYS", "armv4l-linux"]];
  46 $callbacks->{'archlib'} = [\&library_munge, ["SYS", "armv4l-linux"]];
  47 $callbacks->{'archlibexp'} = [\&library_munge, ["SYS", "armv4l-linux"]];
  48 $callbacks->{'installarchlib'} = [\&library_munge, ["SYS", "armv4l-linux"]];
  49 $callbacks->{'installsitearch'} = [\&library_munge, ["SYS", "armv4l-linux"]];
  50 $callbacks->{'sitearch'} = [\&library_munge, ["SYS", "armv4l-linux"]];
  51 $callbacks->{'sitearchexp'} = [\&library_munge, ["SYS", "armv4l-linux"]];
  52
  53 if ($config eq "") {
  54         die("Please run me as generate_config_sh path/to/original/config.sh");
  55 }
  56
  57 open(FILE, "$config") || die("Unable to open $config");
  58
  59 my $line_in;
  60 while ($line_in = <FILE>) {
  61         if ($line_in =~ /^#/) {
  62                 next;
  63         }
  64
  65         if ($line_in !~ /./) {
  66                 next;
  67         }
  68
  69         $line_in =~ /^([^=]+)=(.*)/;
  70         my $key = $1;
  71         my $value = $2;
  72         if (ref($callbacks->{$key}) eq "ARRAY") {
  73                 ($callbacks->{$key}[0])->($key,$value);
  74         } else {
  75                 print($line_in);
  76         }
  77 }
  78
  79 sub backtick {
  80         my $key = shift;
  81         my $value = shift;
  82         my $envvar = $callbacks->{$key}->[1][0];
  83
  84         if ($ENV{$envvar}) {
  85                 my $rawtext = `$callbacks->{$key}->[1][1]`;
  86                 chomp($rawtext);
  87                 print("$key=\'$rawtext\'\n");
  88         } else {
  89                 print("$key=\'$callbacks->{$key}->[1][2]\'\n");
  90         }
  91 }
  92
  93
  94 sub simple_process {
  95         my $key = shift;
  96         my $envvar = $callbacks->{$key}->[1][0];
  97
  98         if ($ENV{$envvar}) {
  99                 print("$key=\"$ENV{$envvar}\"\n");
 100         } else {
 101                 print("$key=\'$callbacks->{$key}->[1][1]\'\n");
 102         }
 103
 104 }
 105
 106 sub simple_process_append {
 107         my $key = shift;
 108         my $envvar = $callbacks->{$key}->[1][0];
 109
 110         if ($ENV{$envvar}) {
 111                 print("$key=\"$ENV{$envvar} $callbacks->{$key}->[1][2]\"\n");
 112         } else {
 113                 print("$key=\'$callbacks->{$key}->[1][1]\'\n");
 114         }
 115
 116 }
 117
 118 sub library_munge {
 119         my $key = shift;
 120         my $value = shift;
 121         my $envvar = $callbacks->{$key}->[1][0];
 122
 123         if ($ENV{$envvar}) {
 124                 $value =~ s/$callbacks->{$key}->[1][1]/$ENV{$envvar}/g;
 125                 print("$key=$value\n");
 126         } else {
 127                 print("$key=$value\n");
 128         }
 129
 130 }
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