mingw-w64: drop obsolete gcc7 patch

Follow-up to cd56aa1623

plugins/gcc7/gcc7-overlay.mk

@@ -23,6 +23,3 @@ $(PKG)_SUBDIR   := gcc-$($(PKG)_VERSION)
 $(PKG)_FILE     := gcc-$($(PKG)_VERSION).tar.xz
 $(PKG)_URL      := https://ftp.gnu.org/gnu/gcc/gcc-$($(PKG)_VERSION)/$($(PKG)_FILE)
 $(PKG)_PATCHES  := $(dir $(lastword $(MAKEFILE_LIST)))/gcc7.patch
-
-# use mingw-w64 patch from #1782 - breaks cgal and opencv for gcc5
-mingw-w64_PATCHES  := $(dir $(lastword $(MAKEFILE_LIST)))/mingw-w64-1-fixes.patch

plugins/gcc7/mingw-w64-1-fixes.patch

@@ -1,90 +0,0 @@
-This file is part of MXE. See LICENSE.md for licensing information.
-
-Contains ad hoc patches for cross building.
-
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Mark Brand <mabrand@mabrand.nl>
-Date: Sun, 29 Mar 2015 14:36:38 +0200
-Subject: [PATCH] workaround for -isystem flag messing up include order
-
-https://bugzilla.redhat.com/show_bug.cgi?id=843436
-
-diff --git a/mingw-w64-headers/crt/float.h b/mingw-w64-headers/crt/float.h
-index 1111111..2222222 100644
---- a/mingw-w64-headers/crt/float.h
-+++ b/mingw-w64-headers/crt/float.h
-@@ -114,6 +114,15 @@
- 	#define DBL_MAX_10_EXP	__DBL_MAX_10_EXP__
- 	#define LDBL_MAX_10_EXP	__LDBL_MAX_10_EXP__
- 
-+    /* The difference between 1 and the least value greater than 1 that is
-+    representable in the given floating point type, b**1-p.  */
-+    #undef FLT_EPSILON
-+    #undef DBL_EPSILON
-+    #undef LDBL_EPSILON
-+    #define FLT_EPSILON __FLT_EPSILON__
-+    #define DBL_EPSILON __DBL_EPSILON__
-+    #define LDBL_EPSILON    __LDBL_EPSILON__
-+
- 	/* Addition rounds to 0: zero, 1: nearest, 2: +inf, 3: -inf, -1: unknown.  */
- 	/* ??? This is supposed to change with calls to fesetround in <fenv.h>.  */
- 	#undef FLT_ROUNDS
-
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Luke Potgieter <fried.roadkill+ght@gmail.com>
-Date: Wed, 6 Sep 2017 18:21:27 +0200
-Subject: [PATCH] Fixes an issue where gcc 7.x cannot be build for the
- i686-w64-mingw32.shared target, as per the borrowed solution from the thread:
- https://sourceforge.net/p/mingw-w64/mailman/message/35828144/ MinGW-w64
- upstream have applied the same codefix to their repository:
- https://sourceforge.net/p/mingw-w64/mingw-w64/ci/431ac2a912708546cd7271332e9331399e66bc62/
- All we need do is wait for version > 5.0.2 to be released, in which case this
- patch must be removed.
-
-
-diff --git a/mingw-w64-libraries/winpthreads/src/libgcc/dll_math.c b/mingw-w64-libraries/winpthreads/src/libgcc/dll_math.c
-index 1111111..2222222 100644
---- a/mingw-w64-libraries/winpthreads/src/libgcc/dll_math.c
-+++ b/mingw-w64-libraries/winpthreads/src/libgcc/dll_math.c
-@@ -120,6 +120,7 @@ u_quad_t	__qdivrem(u_quad_t u, u_quad_t v, u_quad_t *rem);
- u_quad_t	__udivdi3(u_quad_t a, u_quad_t b);
- u_quad_t	__umoddi3(u_quad_t a, u_quad_t b);
- int		__ucmpdi2(u_quad_t a, u_quad_t b);
-+quad_t		__divmoddi4(quad_t a, quad_t b, quad_t *rem);
- 
- #endif /* !_LIBKERN_QUAD_H_ */
- 
-@@ -546,7 +547,32 @@ __umoddi3(a, b)
- 	(void)__qdivrem(a, b, &r);
- 	return (r);
- }
-+
-+/*
-+ * Divide two signed quads.
-+ * This function is new in GCC 7.
-+ */
-+quad_t
-+__divmoddi4(a, b, rem)
-+	quad_t a, b, *rem;
-+{
-+	u_quad_t ua, ub, uq, ur;
-+	int negq, negr;
-+
-+	if (a < 0)
-+		ua = -(u_quad_t)a, negq = 1, negr = 1;
-+	else
-+		ua = a, negq = 0, negr = 0;
-+	if (b < 0)
-+		ub = -(u_quad_t)b, negq ^= 1;
-+	else
-+		ub = b;
-+	uq = __qdivrem(ua, ub, &ur);
-+	if (rem)
-+		*rem = (negr ? -ur : ur);
-+	return (negq ? -uq : uq);
-+}
-+
- #else
- static int __attribute__((unused)) dummy;
- #endif /*deined (_X86_) && !defined (__x86_64__)*/
--