From c17486a0ef12745576ad985d2685b7ea66b0a011 Mon Sep 17 00:00:00 2001
From: TwistedUmbrella <twistedumbrella@gmail.com>
Date: Thu, 20 Aug 2015 17:12:15 -0400
Subject: [PATCH] Workaround for missing fp.h header in Xcode

---
 core/deps/libpng/fp.h      | 62 ++++++++++++++++++++++++++++++++++++++
 core/deps/libpng/pngpriv.h |  6 +++-
 2 files changed, 67 insertions(+), 1 deletion(-)
 create mode 100644 core/deps/libpng/fp.h

diff --git a/core/deps/libpng/fp.h b/core/deps/libpng/fp.h
new file mode 100644
index 000000000..29241c448
--- /dev/null
+++ b/core/deps/libpng/fp.h
@@ -0,0 +1,62 @@
+/*
+* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
+*
+* @APPLE_LICENSE_HEADER_START@
+*
+* The contents of this file constitute Original Code as defined in and
+* are subject to the Apple Public Source License Version 1.1 (the
+* "License").  You may not use this file except in compliance with the
+* License.  Please obtain a copy of the License at
+* http://www.apple.com/publicsource and read it before using this file.
+*
+* This Original Code and all software distributed under the License are
+* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+* License for the specific language governing rights and limitations
+* under the License.
+*
+* @APPLE_LICENSE_HEADER_END@
+*/
+/* Copyright (c) 1992, NeXT Computer, Inc.  All rights reserved.
+*
+*	File:	libc/m98k/gen/fp.h
+*	Author:	Derek B Clegg, NeXT Computer, Inc.
+*
+* HISTORY
+*  11-Nov-92  Derek B Clegg (dclegg@next.com)
+*	Created.
+*
+* Common definitions for floating-point numbers.
+*/
+
+/* The following definitions for for double precision IEEE format numbers. */
+
+#define EXPONENT_BIAS 1023
+
+#define SIGN_BITS 1
+#define EXPONENT_BITS 11
+#define FRACTION_BITS 52
+#define HI_FRACTION_BITS 20
+#define LO_FRACTION_BITS 32
+
+struct double_format {
+unsigned sign: SIGN_BITS;
+unsigned exponent: EXPONENT_BITS;
+unsigned hi_fraction: HI_FRACTION_BITS;
+unsigned lo_fraction: LO_FRACTION_BITS;
+};
+
+union dbl {
+struct double_format s;
+unsigned int u[2];
+double value;
+};
+
+#define PlusInfinity	(1.0/0.0)
+#define MinusInfinity	(-1.0/0.0)
+
+#define not_a_number(x)		((x) != (x))
+#define positive_infinity(x)	((x) == PlusInfinity)
+#define negative_infinity(x)	((x) == MinusInfinity)
diff --git a/core/deps/libpng/pngpriv.h b/core/deps/libpng/pngpriv.h
index 10d85f779..92860c6ea 100644
--- a/core/deps/libpng/pngpriv.h
+++ b/core/deps/libpng/pngpriv.h
@@ -48,7 +48,11 @@
       * <fp.h> if possible.
       */
 #    if !defined(__MATH_H__) && !defined(__MATH_H) && !defined(__cmath__)
-#      include <fp.h>
+#        if TARGET_OS_IPHONE
+#          include "fp.h"
+#        else
+#          include <fp.h>
+#        endif
 #    endif
 #  else
 #    include <math.h>