From be149af1735ba52aefd85d6d318b11e45c3244b5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20P=C3=ADsa=C5=99?= <ppisar@redhat.com>
Date: Mon, 22 Jul 2013 09:32:29 +0200
Subject: [PATCH] Empty cflags are valid cflags
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ExtUtils::PkgConfig-find() croaked on emptry cflags:

$ pkg-config --cflags 'libffi >= 3.0.0'| hexdump -C
00000000  0a                                                |.|
00000001
$ perl -MData::Dumper -MExtUtils::PkgConfig -e 'print
Dumper(ExtUtils::PkgConfig->find(q{libffi}))'
*** can't find cflags for "libffi"
*** is it properly installed and available in PKG_CONFIG_PATH?
 at -e line 1.

That's wrong. Empty string cflags are valid cflafs too.

<https://rt.cpan.org/Public/Bug/Display.html?id=84026>

Signed-off-by: Petr Písař <ppisar@redhat.com>
---
 lib/ExtUtils/PkgConfig.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/ExtUtils/PkgConfig.pm b/lib/ExtUtils/PkgConfig.pm
index 075d8dc..0f68256 100644
--- a/lib/ExtUtils/PkgConfig.pm
+++ b/lib/ExtUtils/PkgConfig.pm
@@ -129,7 +129,7 @@ sub find {
                 $data{$what} =~ s/[\015\012]+$//;
 		croak "*** can't find $what for \"$data{pkg}\"\n"
 		    . "*** is it properly installed and available in PKG_CONFIG_PATH?\n"
-			unless $data{$what};
+			unless defined $data{$what};
 	}
 	return %data;
 }
-- 
1.8.1.4