1#!/usr/bin/perl
2
3##############################################################################
4#
5#	generate_config_sh
6#		Process that takes an automatically generated config.sh
7#		file and allows the environment to overload the values
8#		automatically discovered by Configure on our target platform.
9#
10#	Author	Redvers Davies <red@criticalintegration.com>
11#
12##############################################################################
13
14my $config = shift;
15
16my $sys = $ENV{SYS};
17
18my $callbacks = {};
19$callbacks->{'ar'} = [\&simple_process, ["AR", "arm-linux-ar"]];
20$callbacks->{'archname'} = [\&simple_process, ["SYS", "armv4l-linux"]];
21$callbacks->{'cc'} = [\&simple_process, ["CC", "arm-linux-gcc"]];
22$callbacks->{'cccdlflags'} = [\&simple_process, ["CFLAGS", ""]];
23$callbacks->{'ccdlflags'} = [\&simple_process, ["CFLAGS", ""]];
24$callbacks->{'ccflags'} = [\&simple_process, ["CFLAGS", "-fno-strict-aliasing -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"]];
25$callbacks->{'ccflags_uselargefiles'} = [\&simple_process, ["CFLAGS", "-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64"]];
26$callbacks->{'ccname'} = [\&simple_process, ["CC", "arm-linux-gcc"]];
27$callbacks->{'cpp'} = [\&simple_process, ["CCP", "arm-linux-cpp"]];
28$callbacks->{'cppflags'} = [\&simple_process, ["CCPFLAGS", "-fno-strict-aliasing"]];
29$callbacks->{'cpprun'} = [\&simple_process_append, ["CC", "arm-linux-gcc -E", "-E"]];
30$callbacks->{'cppstdin'} = [\&simple_process_append, ["CC", "arm-linux-gcc -E", "-E"]];
31$callbacks->{'full_ar'} = [\&backtick, ["AR", "which $ENV{AR}", "/usr/local/arm/2.95.3/bin/arm-linux-ar"]];
32$callbacks->{'ld'} = [\&simple_process, ["LD", "arm-linux-ld"]];
33$callbacks->{'ldflags'} = [\&simple_process, ["LDFLAGS", ""]];
34$callbacks->{'ldflags_uselargefiles'} = [\&simple_process, ["LDFLAGS", ""]];
35$callbacks->{'myarchname'} = [\&simple_process, ["SYS", "armv4l-linux"]];
36$callbacks->{'archlib'} = [\&library_munge, ["SYS", "armv4l-linux"]];
37$callbacks->{'archlibexp'} = [\&library_munge, ["SYS", "armv4l-linux"]];
38$callbacks->{'installarchlib'} = [\&library_munge, ["SYS", "armv4l-linux"]];
39$callbacks->{'installsitearch'} = [\&library_munge, ["SYS", "armv4l-linux"]];
40$callbacks->{'sitearch'} = [\&library_munge, ["SYS", "armv4l-linux"]];
41$callbacks->{'sitearchexp'} = [\&library_munge, ["SYS", "armv4l-linux"]];
42
43if ($config eq "") {
44	die("Please run me as generate_config_sh path/to/original/config.sh");
45}
46
47open(FILE, "$config") || die("Unable to open $config");
48
49my $line_in;
50while ($line_in = <FILE>) {
51	if ($line_in =~ /^#/) {
52		next;
53	}
54
55	if ($line_in !~ /./) {
56		next;
57	}
58
59	$line_in =~ /^([^=]+)=(.*)/;
60	my $key = $1;
61	my $value = $2;
62	if (ref($callbacks->{$key}) eq "ARRAY") {
63		($callbacks->{$key}[0])->($key,$value);
64	} else {
65		print($line_in);
66	}
67}
68
69sub backtick {
70	my $key = shift;
71	my $value = shift;
72	my $envvar = $callbacks->{$key}->[1][0];
73
74	if ($ENV{$envvar}) {
75		my $rawtext = `$callbacks->{$key}->[1][1]`;
76		chomp($rawtext);
77		print("$key=\'$rawtext\'\n");
78	} else {
79		print("$key=\'$callbacks->{$key}->[1][2]\'\n");
80	}
81}
82
83
84sub simple_process {
85	my $key = shift;
86	my $envvar = $callbacks->{$key}->[1][0];
87
88	if ($ENV{$envvar}) {
89		print("$key=\"$ENV{$envvar}\"\n");
90	} else {
91		print("$key=\'$callbacks->{$key}->[1][1]\'\n");
92	}
93
94}
95
96sub simple_process_append {
97	my $key = shift;
98	my $envvar = $callbacks->{$key}->[1][0];
99
100	if ($ENV{$envvar}) {
101		print("$key=\"$ENV{$envvar} $callbacks->{$key}->[1][2]\"\n");
102	} else {
103		print("$key=\'$callbacks->{$key}->[1][1]\'\n");
104	}
105
106}
107
108sub library_munge {
109	my $key = shift;
110	my $value = shift;
111	my $envvar = $callbacks->{$key}->[1][0];
112
113	if ($ENV{$envvar}) {
114		$value =~ s/$callbacks->{$key}->[1][1]/$ENV{$envvar}/g;
115		print("$key=$value\n");
116	} else {
117		print("$key=$value\n");
118	}
119
120}
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