Add support for armv7-*-freebsd*.

This patch is already upstreamed, it can be dropped when a new GCC 7.x is
available.

PR:	221905
Approved by:	gerald@ (maintainer)

lang/gcc7/Makefile

@@ -14,7 +14,7 @@ COMMENT=	GNU Compiler Collection 7
 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
 
 LIB_DEPENDS=	libgmp.so:math/gmp \
 		libmpfr.so:math/mpfr \
@@ -62,7 +62,7 @@ CONFIGURE_ENV+=	UNAME_m="powerpc64"
 USE_GCC=	yes
 .endif
 
-.if ${ARCH} == armv6
+.if ${ARCH} == armv6 || ${ARCH} == armv7
 . if ${COMPILER_TYPE} == clang
 .  if empty(PORT_OPTIONS:MBOOTSTRAP)
 MAKE_ARGS+=CXXFLAGS+=-fbracket-depth=512

lang/gcc7/files/patch-armv7-support

@@ -0,0 +1,21 @@
+---UTC
+Index: gcc/config.gcc
+===================================================================
+--- gcc/config.gcc	(revision 253513)
++++ gcc/config.gcc	(working copy)
+@@ -1077,11 +1077,14 @@
+ 	case $target in
+ 	armv6*-*-freebsd*)
+ 	    target_cpu_cname="arm1176jzfs"
+-	    tm_defines="${tm_defines} TARGET_FREEBSD_ARMv6=1"
+             if test $fbsd_major -ge 11; then
+                tm_defines="${tm_defines} TARGET_FREEBSD_ARM_HARD_FLOAT=1"
+             fi
+ 	    ;;
++	armv7*-*-freebsd*)
++	    target_cpu_cname="genericv7a"
++	    tm_defines="${tm_defines} TARGET_FREEBSD_ARM_HARD_FLOAT=1"
++	    ;;
+ 	*)
+ 	    target_cpu_cname="arm9"
+ 	    ;;