use strict;
use warnings;
use Config;
use IPC::Open2;
use IPC::Open3;
use Text::ParseWords;
BEGIN {
use Exporter ();
our ($VERSION, @ISA, @EXPORT, @EXPORT_OK, %EXPORT_TAGS);
$VERSION = 1.00;
@ISA = qw(Exporter);
@EXPORT = qw(&applyPreprocessor);
%EXPORT_TAGS = ( );
@EXPORT_OK = ();
}
sub applyPreprocessor
{
my $fileName = shift;
my $defines = shift;
my $preprocessor = shift;
my @args = ();
if (!$preprocessor) {
if ($Config::Config{"osname"} eq "MSWin32") {
$preprocessor = $ENV{CC} || "cl";
push(@args, qw(/EP));
} else {
$preprocessor = $ENV{CC} || (-x "/usr/bin/clang" ? "/usr/bin/clang" : "/usr/bin/gcc");
push(@args, qw(-E -P -x c++));
}
}
if ($Config::Config{"osname"} eq "darwin") {
push(@args, "-I" . $ENV{BUILT_PRODUCTS_DIR} . "/usr/local/include") if $ENV{BUILT_PRODUCTS_DIR};
push(@args, "-isysroot", $ENV{SDKROOT}) if $ENV{SDKROOT};
}
$defines =~ s/\"//g;
my @macros = grep { $_ } split(/\s+/, $defines); @macros = map { "-D$_" } @macros;
my $pid = 0;
if ($Config{osname} eq "cygwin") {
$ENV{PATH} = "$ENV{PATH}:/cygdrive/c/cygwin/bin";
my @preprocessorAndFlags = shellwords($preprocessor);
if ($preprocessorAndFlags[0] =~ "cl.exe") {
$fileName = Cygwin::posix_to_win_path($fileName);
}
$preprocessorAndFlags[0] = Cygwin::win_to_posix_path($preprocessorAndFlags[0]);
for (my $tries = 0; !$pid && ($tries < 20); $tries++) {
eval {
use Symbol 'gensym'; my $err = gensym;
$pid = open3(\*PP_IN, \*PP_OUT, $err, @preprocessorAndFlags, @args, @macros, $fileName);
1;
} or do {
sleep 1;
}
};
} elsif ($Config::Config{"osname"} eq "MSWin32") {
use Symbol 'gensym'; my $err = gensym;
$pid = open3(\*PP_IN, \*PP_OUT, $err, $preprocessor, @args, @macros, $fileName);
} else {
$pid = open2(\*PP_OUT, \*PP_IN, shellwords($preprocessor), @args, @macros, $fileName);
}
close PP_IN;
my @documentContent = <PP_OUT>;
close PP_OUT;
waitpid($pid, 0);
return @documentContent;
}
1;