RISC-V: Support for FreeBSD.

	gcc/
	* config.gcc (riscv*-*-freebsd*): Add RISC-V FreeBSD support.
	* config/riscv/freebsd.h: New.
	libgcc/
	* config.host (riscv*-*-freebsd*): Add RISC-V FreeBSD support.

From-SVN: r259190

gcc/ChangeLog

+2018-04-06  Ruslan Bukin  <br@bsdpad.com>
+	    Kito Cheng  <kito.cheng@gmail.com>
+
+	* config.gcc (riscv*-*-freebsd*): Add RISC-V FreeBSD support.
+	* config/riscv/freebsd.h: New.
+
 2018-04-06  Chung-Ju Wu  <jasonwucj@gmail.com>
 
 	* config/nds32/nds32.c (nds32_adjust_insn_length): Refine.
@@ -10043,4 +10049,6 @@
 
 Copyright (C) 2018 Free Software Foundation, Inc.
 
-Copying and distribu
+Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved.

gcc/config.gcc

@@ -2089,6 +2089,15 @@ riscv*-*-elf* | riscv*-*-rtems*)
 	  ;;
 	esac
 	;;
+riscv*-*-freebsd*)
+	tm_file="${tm_file} elfos.h ${fbsd_tm_file} riscv/freebsd.h"
+	tmake_file="${tmake_file} riscv/t-riscv"
+	gnu_ld=yes
+	gas=yes
+	# Force .init_array support.  The configure script cannot always
+	# automatically detect that GAS supports it, yet we require it.
+	gcc_cv_initfini_array=yes
+	;;
 mips*-*-netbsd*)			# NetBSD/mips, either endian.
 	target_cpu_default="MASK_ABICALLS"
 	tm_file="elfos.h ${tm_file} mips/elf.h ${nbsd_tm_file} mips/netbsd.h"

gcc/config/riscv/freebsd.h

+/* Definitions for RISC-V FreeBSD systems with ELF format.
+   Copyright (C) 2018 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "int"
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE 32
+
+#undef  SUBTARGET_EXTRA_SPECS
+#define SUBTARGET_EXTRA_SPECS \
+  { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
+
+#undef CC1_SPEC
+#define CC1_SPEC "%(cc1_cpu) %{profile:-p}"
+
+/* Provide a LINK_SPEC appropriate for FreeBSD.  Here we provide support
+   for the special GCC options -static and -shared, which allow us to
+   link things in one of these three modes by applying the appropriate
+   combinations of options at link-time.
+
+   When the -shared link option is used a final link is not being
+   done.  */
+
+#undef LINK_SPEC
+#define LINK_SPEC "						\
+  -melf" XLEN_SPEC "lriscv					\
+  %{p:%nconsider using `-pg' instead of `-p' with gprof (1) }	\
+  %{v:-V}							\
+  %{assert*} %{R*} %{rpath*} %{defsym*}				\
+  %{shared:-Bshareable %{h*} %{soname*}}			\
+  %{symbolic:-Bsymbolic}					\
+  %{static:-Bstatic}						\
+  %{!shared:							\
+      %{!static:						\
+        %{rdynamic:-export-dynamic}				\
+        -dynamic-linker " FBSD_DYNAMIC_LINKER "}		\
+        %{static:-static}}"

libgcc/ChangeLog

+2018-04-06  Ruslan Bukin  <br@bsdpad.com>
+
+	* config.host (riscv*-*-freebsd*): Add RISC-V FreeBSD support.
+
 2018-03-29  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/85100

libgcc/config.host

@@ -1128,6 +1128,10 @@ riscv*-*-linux*)
 	extra_parts="$extra_parts crtbegin.o crtend.o crti.o crtn.o crtendS.o crtbeginT.o"
 	md_unwind_header=riscv/linux-unwind.h
 	;;
+riscv*-*-freebsd*)
+	tmake_file="${tmake_file} riscv/t-softfp${host_address} t-softfp riscv/t-elf riscv/t-elf${host_address}"
+	extra_parts="$extra_parts crtbegin.o crtend.o crti.o crtn.o crtendS.o crtbeginT.o"
+	;;
 riscv*-*-*)
 	tmake_file="${tmake_file} riscv/t-softfp${host_address} t-softfp riscv/t-elf riscv/t-elf${host_address}"
 	extra_parts="$extra_parts crtbegin.o crtend.o crti.o crtn.o"