7 $Getopt::Std::STANDARD_HELP_VERSION = 1;
9 my $trysource = "try.c";
12 getopts('fF:ekvI:X', \my %opt) or pod2usage();
14 my($expr, @headers) = @ARGV ? splice @ARGV : "-";
16 pod2usage "-f and -F <tool> are exclusive\n" if $opt{f} and $opt{F};
18 foreach($trysource, $tryout) {
20 die "You already have a $_" if -e $_;
24 warn "reading from stdin...\n";
25 $expr = do { local $/; <> };
28 my($macro, $args) = $expr =~ /^\s*(\w+)((?:\s*\(.*\))?)\s*;?\s*$/s
29 or pod2usage "$expr doesn't look like a macro-name or macro-expression to me";
31 if (!(@ARGV = @headers)) {
32 open my $fh, '<', 'MANIFEST' or die "Can't open MANIFEST: $!";
34 push @ARGV, $1 if m!^([^/]+\.h)\t!;
36 push @ARGV, 'config.h' if -f 'config.h';
41 next unless /^#\s*define\s+$macro\b/;
42 my ($def_args) = /^#\s*define\s+$macro\(([^)]*)\)/;
43 if (defined $def_args && !$args) {
44 my @args = split ',', $def_args;
45 print "# macro: $macro args: @args in $_\n" if $opt{v};
47 $args = '(' . join (', ', map {$argname++} 1..@args) . ')';
52 die "$macro not found\n" unless defined $header;
54 if ($^O =~ /MSWin(32|64)/) {
55 # The Win32 (and Win64) build process expects to be run from
58 or die "Couldn't chdir to win32: $!";
61 open my $out, '>', $trysource or die "Can't open $trysource: $!";
63 my $sentinel = "$macro expands to";
69 return if $done_header{$header}++;
70 print $out qq{#include "$header"\n};
73 print $out <<'EOF' if $opt{X};
74 /* Need to do this like this, as cflags.sh sets it for us come what may. */
79 do_header('EXTERN.h');
82 do_header('XSUB.h') if $opt{X};
89 close $out or die "Can't close $trysource: $!";
91 print "doing: $Config{make} $tryout\n" if $opt{v};
92 my $cmd = "$Config{make} $tryout";
94 or die "Couldn't launch [$cmd]: $! / $?";
96 # if user wants 'indent' formatting ..
99 if ($opt{f} || $opt{F}) {
100 # a: indent is a well behaved filter when given 0 arguments, reading from
101 # stdin and writing to stdout
102 # b: all our braces should be balanced, indented back to column 0, in the
103 # headers, hence everything before our #line directive can be ignored
105 # We can take advantage of this to reduce the work to indent.
107 my $indent_command = $opt{f} ? 'indent' : $opt{F};
109 if (defined $opt{I}) {
110 $indent_command .= " $opt{I}";
112 open $out_fh, '|-', $indent_command or die $?;
118 open my $fh, '<', $tryout or die "Can't open $tryout: $!";
121 print $out_fh $_ if /$sentinel/o .. 1;
126 foreach($trysource, $tryout) {
127 die "Can't unlink $_: $!" unless unlink $_;
135 expand-macro.pl - expand C macros using the C preprocessor
139 expand-macro.pl [options] [ < macro-name | macro-expression | - > [headers] ]
142 -f use 'indent' to format output
143 -F <tool> use <tool> to format output (instead of -f)
144 -e erase try.[ic] instead of failing when they're present (errdetect)
145 -k keep them after generating (for handy inspection)
147 -I <indent-opts> passed into indent
148 -X include "XSUB.h" (and undefine PERL_CORE)