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428
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1 : #-*- Perl -*-
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2 # Copyright (C) 1998 Free Software Foundation, Inc.
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3
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4 # This file is part of XEmacs.
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5 #
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6 # XEmacs is free software; you can redistribute it and/or modify it
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7 # under the terms of the GNU General Public License as published by the
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8 # Free Software Foundation; either version 2, or (at your option) any
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9 # later version.
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10 #
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11 # XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 # for more details.
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15 #
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16 # You should have received a copy of the GNU General Public License
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17 # along with XEmacs; see the file COPYING. If not, write to
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18 # the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 # Boston, MA 02111-1307, USA.
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20
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21 # Author: Martin Buchholz
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22 eval 'exec perl -w -S $0 ${1+"$@"}'
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23 if 0;
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24
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25 use strict;
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26 my ($myName, $srcdir, %exists, %uses, %generated_header);
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27
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28 ($myName = $0) =~ s@.*/@@; my $usage ="
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29 Usage: $myName
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30
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31 Generates Makefile dependencies for the XEmacs src directory.
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32 The dependencies are written to stdout.\n";
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33
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34 die $usage if @ARGV;
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35
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36 ($srcdir = $0) =~ s@[^/]+$@@;
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37 $srcdir = "." if $srcdir eq "";
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38 chdir $srcdir or die "$srcdir: $!";
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39
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40 opendir SRCDIR, "." or die "$srcdir: $!";
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41 for (grep (/\.[ch]$/, readdir (SRCDIR))) { $exists{$_} = 1; }
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42 closedir SRCDIR;
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43
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44 for (qw (config.h sheap-adjust.h paths.h Emacs.ad.h)) {
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45 $generated_header{$_} = 1;
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46 }
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47
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442
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48 # Although this is not technically true, it ought to be true,
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49 # and makes the generated Makefile smaller.
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50 $uses{'lisp.h'}{'config.h'} = 1;
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51
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428
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52 for my $file (keys %exists) {
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53 open (FILE, $file) or die "$file: $!";
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54 undef $/; $_ = <FILE>;
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55 RemoveComments ($_);
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56 s/[ \t]+//g;
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57 # Find include dependencies
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58 for (/^\#include([^\n]+)/gm) {
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442
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59 if (m@^\"([A-Za-z0-9._-]+\.h)\"@) {
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428
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60 $uses{$file}{$1} = 1 if exists $exists{$1};
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442
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61 } elsif (m@<([A-Za-z0-9._-]+\.h)>@) {
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428
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62 $uses{$file}{$1} = 1 if exists $generated_header{$1};
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442
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63 } elsif (m@\"../lwlib/([A-Za-z0-9._-]+\.h)\"@) {
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428
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64 $uses{$file}{"\$(LWLIB_SRCDIR)/lwlib.h"} = 1;
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65 }
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66 }
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67 }
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68
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69 # Make transitive closure of %uses
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70 while (1) {
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71 my $changedP = 0;
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72 for my $x (keys %uses) {
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73 for my $y (keys %{$uses{$x}}) {
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74 for my $z (keys %{$uses{$y}}) {
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75 if (! exists $uses{$x}{$z}) {
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76 $uses{$x}{$z} = 1;
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77 $changedP = 1;
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78 }
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79 }
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80 }
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81 }
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82 last if !$changedP;
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83 }
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84
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85 # Print file header
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86 print
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442
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87 "## This file is automatically generated by \`$myName'. Do not modify.
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428
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88
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442
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89 #if defined(USE_UNION_TYPE)
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90 LISP_UNION_H=lisp-union.h
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91 #else
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92 LISP_UNION_H=lisp-disunion.h
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93 #endif
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94 ";
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95
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442
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96 my @LISP_H = ('lisp.h', keys %{$uses{'lisp.h'}});
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97 print "LISP_H=@{[grep (!/lisp-(dis)?union\.h/, @LISP_H)]} \$(LISP_UNION_H)\n";
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428
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98
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99 sub PrintDeps {
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100 my $file = shift;
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101 my $ofile = $file; $ofile =~ s/c$/o/; print "$ofile: ";
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102 if (exists $uses{$file}{'lisp.h'}) {
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103 delete @{%{$uses{$file}}}{@LISP_H};
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104 $uses{$file}{'$(LISP_H)'} = 1;
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105 }
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106 print "@{[sort keys %{$uses{$file}}]}\n";
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107 }
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108
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109 sub PrintPatternDeps {
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110 my ($pattern, $CPP_SYMBOL) = @_;
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442
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111 print "#if defined($CPP_SYMBOL)\n";
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428
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112 for my $file (sort grep (/$pattern/ && /\.c$/, keys %uses)) {
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113 PrintDeps($file);
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114 delete $uses{$file};
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115 }
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116 print "#endif\n";
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117 }
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118
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442
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119 PrintPatternDeps ('-msw\\.', "HAVE_MS_WINDOWS");
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120 PrintPatternDeps ('-x\\.', "HAVE_X_WINDOWS");
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121 PrintPatternDeps ('-tty\\.', "HAVE_TTY");
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122 PrintPatternDeps ('^database', "HAVE_DATABASE");
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123 PrintPatternDeps ('^mule', "MULE");
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428
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124 PrintPatternDeps ('^(?:External|extw-)', "EXTERNAL_WIDGET");
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125
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126 for my $file (sort grep (/\.c$/, keys %uses)) { PrintDeps($file); }
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127
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442
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128 # Surprisingly robust regexp to remove comments from arbitrary C code
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428
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129 sub RemoveComments {
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130 $_[0] =~
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131 s{ (
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132 [^\"\'/]+ |
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133 (?:\"[^\"\\]*(?:\\.[^\"\\]*)*\" [^\"\'/]*)+ |
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134 (?:\'[^\'\\]*(?:\\.[^\'\\]*)*\' [^\"\'/]*)+
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135 )
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136 | / (?:
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137 \*[^*]*\*+(?:[^/*][^*]*\*+)*/
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138 |
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139 /[^\n]*
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140 )
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141 }{defined $1 ? $1 : ""}gsxeo;
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142 }
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