Add support for armv7-*-freebsd*.

This patch is already upstreamed and can be dropped once a new GCC 6.x is
released.

PR:	221905
Submitted by:	mmel@
Approved by:	gerald@ (maintainer)

lang/gcc6/Makefile

@@ -14,7 +14,7 @@ COMMENT=	GNU Compiler Collection 6
 LICENSE=	GPLv3 GPLv3RLE
 LICENSE_COMB=	multi
 
-ONLY_FOR_ARCHS=	aarch64 amd64 arm armv6 i386 powerpc powerpc64 sparc64
+ONLY_FOR_ARCHS=	aarch64 amd64 arm armv6 armv7 i386 powerpc powerpc64 sparc64
 BROKEN_sparc64=	fails to configure: cannot compute suffix of object files: cannot compile
 
 LIB_DEPENDS=	libgmp.so:math/gmp \
@@ -73,7 +73,7 @@ CONFIGURE_ENV+=	UNAME_m="powerpc64"
 USE_GCC=	5	# Cannot require ourselves, needs to be at least 4.9.
 .endif
 
-.if ${ARCH} == aarch64 || ${ARCH} == armv6
+.if ${ARCH} == aarch64 || ${ARCH} == armv6 || ${ARCH} == armv7
 . if ${COMPILER_TYPE} == clang
 .  if empty(PORT_OPTIONS:MBOOTSTRAP)
 MAKE_ARGS+=CXXFLAGS=-fbracket-depth=512

lang/gcc6/files/patch-armv7-support

@@ -0,0 +1,28 @@
+---UTC
+--- gcc/config.gcc.orig	2017-01-09 22:01:26.582656000 +0100
++++ gcc/config.gcc	2017-10-07 17:27:59.564810000 +0200
+@@ -1072,6 +1072,10 @@
+                tm_defines="${tm_defines} TARGET_FREEBSD_ARM_HARD_FLOAT=1"
+             fi
+ 	    ;;
++	armv7*-*-freebsd*)
++	    tm_defines="${tm_defines} TARGET_FREEBSD_ARMv7=1"
++            tm_defines="${tm_defines} TARGET_FREEBSD_ARM_HARD_FLOAT=1"
++	    ;;
+ 	esac
+ 	with_tls=${with_tls:-gnu}
+ 	;;
+--- gcc/config/arm/freebsd.h.orig	2016-06-15 21:17:15.860618000 +0200
++++ gcc/config/arm/freebsd.h	2017-10-09 21:38:03.395632000 +0200
+@@ -112,7 +112,10 @@
+ #undef  WCHAR_TYPE_SIZE
+ #define WCHAR_TYPE_SIZE BITS_PER_WORD
+ 
+-#if defined (TARGET_FREEBSD_ARMv6)
++#if defined (TARGET_FREEBSD_ARMv7)
++#undef  SUBTARGET_CPU_DEFAULT
++#define SUBTARGET_CPU_DEFAULT TARGET_CPU_genericv7a
++#elif defined (TARGET_FREEBSD_ARMv6)
+ #undef  SUBTARGET_CPU_DEFAULT
+ #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm1176jzs
+ #else