PNG re-work: remove unused variables
[imager.git] / PNG / Makefile.PL
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1#!perl -w
2use strict;
d24404be 3use ExtUtils::MakeMaker;
1d7e3124 4use Getopt::Long;
b515cc4c 5use Config;
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6
7my $verbose = $ENV{IM_VERBOSE};
8my @libpaths;
9my @incpaths;
10
11GetOptions("incpath=s", \@incpaths,
12 "libpath=s" => \@libpaths,
13 "verbose|v" => \$verbose);
14
15our $BUILDING_IMAGER;
d97c8dbd 16our %IMAGER_LIBS;
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17
18my $MM_ver = eval $ExtUtils::MakeMaker::VERSION;
19
20my %opts =
21 (
22 NAME => 'Imager::File::PNG',
23 VERSION_FROM => 'PNG.pm',
24 OBJECT => 'PNG.o impng.o',
30160513 25 clean => { FILES => 'testout' },
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26 );
27
28my @inc;
29if ($BUILDING_IMAGER) {
30 push @inc, "-I..";
b515cc4c 31 unshift @INC, "../lib";
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32}
33else {
b515cc4c 34 unshift @INC, "inc";
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35 print "PNG: building independently\n";
36 require Imager::ExtUtils;
37 push @inc, Imager::ExtUtils->includes;
38 $opts{TYPEMAPS} = [ Imager::ExtUtils->typemap ];
39
40 # Imager required configure through use
de50f459 41 my @Imager_req = ( Imager => "0.90" );
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42 if ($MM_ver >= 6.46) {
43 $opts{META_MERGE} =
44 {
45 configure_requires =>
46 {
47 @Imager_req,
48 },
49 build_requires =>
50 {
51 @Imager_req,
52 "Test::More" => "0.47",
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53 },
54 resources =>
55 {
56 homepage => "http://imager.perl.org/",
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57 repository => "git://git.imager.perl.org/imager.git",
58 bugtracker => "http://rt.cpan.org/NoAuth/Bugs.html?Dist=Imager",
b515cc4c 59 },
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60 };
61 $opts{PREREQ_PM} =
62 {
63 @Imager_req,
a5919365 64 XSLoader => 0,
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65 };
66 }
67}
68
69require Imager::Probe;
70
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71my @alts =
72 (
73 {
74 altname => "v1.5",
75 incsuffix => "libpng15",
76 libbase => "png15",
77 },
78 {
79 altname => "v1.4",
80 incsuffix => "libpng14",
81 libbase => "png14",
82 },
83 {
84 altname => "v1.2",
85 incsuffix => "libpng12",
86 libbase => "png12",
87 },
88 {
89 altname => "v1.0",
90 incsuffix => "libpng10",
91 libbase => "png10",
92 },
93 );
94
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95my %probe =
96 (
97 name => "PNG",
cac1147d 98 altname => "Generic",
9b4036f7 99 pkg => [ qw/libpng15 libpng14 libpng12 libpng10 libpng/ ],
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100 inccheck => sub { -e File::Spec->catfile($_[0], "png.h") },
101 libbase => "png",
102 testcode => _png_test_code(),
103 testcodeheaders => [ "png.h", "stdio.h" ],
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104 incpath => \@incpaths,
105 libpath => \@libpaths,
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106 alternatives =>
107 [
de50f459 108 @alts,
9b4036f7 109 {
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110 altname => "base (+libz)",
111 libbase => [ "png", "z" ],
cac1147d 112 },
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113 ( # a static libpng may require libz too
114 map +{
115 %$_,
116 altname => "$_->{altname} (+libz)",
117 libbase => [ $_->{libbase}, "z" ],
118 }, @alts
119 ),
cac1147d 120 ],
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121 );
122
123my $probe_res = Imager::Probe->probe(\%probe);
124if ($probe_res) {
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125 $IMAGER_LIBS{PNG} = 1;
126
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127 push @inc, $probe_res->{INC};
128 $opts{LIBS} = $probe_res->{LIBS};
03e49392 129 $opts{DEFINE} = $probe_res->{DEFINE};
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130 $opts{INC} = "@inc";
131
132 if ($MM_ver > 6.06) {
5b480b14 133 $opts{AUTHOR} = 'Tony Cook <tonyc@cpan.org>';
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134 $opts{ABSTRACT} = 'PNG Image file support';
135 }
136
137 WriteMakefile(%opts);
138}
139else {
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140 $IMAGER_LIBS{PNG} = 0;
141
1d7e3124 142 if ($BUILDING_IMAGER) {
d24404be 143 ExtUtils::MakeMaker::WriteEmptyMakefile(%opts);
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144 }
145 else {
146 # fail in good way
147 die "OS unsupported: PNG libraries or headers not found\n";
148 }
149}
150
151sub _png_test_code {
152 return <<'CODE';
153
154fprintf(stderr, "PNG: library version %ld, header version %ld\n", (long)png_access_version_number(), (long)PNG_LIBPNG_VER);
155return 0;
156CODE
157}