gcc: update multilibs for RISC-V

We now have the following multilibs for RISC-V:

rv32ima (default)
rv32im
rv32imac
rv32imafc
rv32imafd
rv64imac
rv64imafdc
rv64imafd
rv64imac, mcmodel=medany
rv64imafdc, mcmodel=medany
rv64imafd, mcmodel=medany

Multilib description generated by multilib-generator. Added
mcmodel=medany manually.

Signed-off-by: Martin Åberg <martin.aberg@gaisler.com>

patches/gcc/10.2.0/0018-RISC-V-update-multilibs.patch

@@ -0,0 +1,90 @@
+From cadc173e08dae25cf37c90eb8bf8b2bdcc118119 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Martin=20=C3=85berg?= <martin.aberg@gaisler.com>
+Date: Tue, 15 Dec 2020 08:40:21 +0100
+Subject: [PATCH] RISC-V: update multilibs
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+We now have the following multilibs for RISC-V:
+
+rv32ima (default)
+rv32im
+rv32imac
+rv32imafc
+rv32imafd
+rv64imac
+rv64imafdc
+rv64imafd
+rv64imac, mcmodel=medany
+rv64imafdc, mcmodel=medany
+rv64imafd, mcmodel=medany
+
+Signed-off-by: Martin Åberg <martin.aberg@gaisler.com>
+---
+ gcc/config.gcc            |  3 +++
+ gcc/config/riscv/t-zephyr | 38 ++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 41 insertions(+)
+ create mode 100644 gcc/config/riscv/t-zephyr
+
+diff --git a/gcc/config.gcc b/gcc/config.gcc
+index 96a17f7eacb..431015c682a 100644
+--- a/gcc/config.gcc
++++ b/gcc/config.gcc
+@@ -2445,6 +2445,9 @@ riscv*-*-linux*)
+ riscv*-*-elf* | riscv*-*-rtems*)
+ 	tm_file="elfos.h newlib-stdint.h ${tm_file} riscv/elf.h"
+ 	case ${target} in
++	*-zephyr*)
++	  tmake_file="${tmake_file} riscv/t-zephyr"
++	  ;;
+ 	*-*-rtems*)
+ 	  tm_file="${tm_file} rtems.h riscv/rtems.h"
+ 	  tmake_file="${tmake_file} riscv/t-rtems"
+diff --git a/gcc/config/riscv/t-zephyr b/gcc/config/riscv/t-zephyr
+new file mode 100644
+index 00000000000..2dead4d3b2a
+--- /dev/null
++++ b/gcc/config/riscv/t-zephyr
+@@ -0,0 +1,38 @@
++# This file was generated by multilib-generator with the command:
++#  ./multilib-generator rv32im-ilp32--c rv32imac-ilp32-- rv32imafc-ilp32f-- rv32imafd-ilp32d--c rv64imac-lp64-- rv64imafdc-lp64d-- rv64imafd-lp64d--
++MULTILIB_OPTIONS = march=rv32im/march=rv32imc/march=rv32imac/march=rv32imafc/march=rv32imafd/march=rv32imafdc/march=rv32g/march=rv32gc/march=rv64imac/march=rv64imafdc/march=rv64gc/march=rv64imafd/march=rv64g mabi=ilp32/mabi=ilp32f/mabi=ilp32d/mabi=lp64/mabi=lp64d
++MULTILIB_DIRNAMES = rv32im \
++rv32imc \
++rv32imac \
++rv32imafc \
++rv32imafd \
++rv32imafdc \
++rv32g \
++rv32gc \
++rv64imac \
++rv64imafdc \
++rv64gc \
++rv64imafd \
++rv64g ilp32 \
++ilp32f \
++ilp32d \
++lp64 \
++lp64d
++MULTILIB_OPTIONS += mcmodel=medany
++MULTILIB_DIRNAMES += medany
++MULTILIB_REQUIRED = march=rv32im/mabi=ilp32 \
++march=rv32imac/mabi=ilp32 \
++march=rv32imafc/mabi=ilp32f \
++march=rv32imafd/mabi=ilp32d \
++march=rv64imac/mabi=lp64 \
++march=rv64imafdc/mabi=lp64d \
++march=rv64imafd/mabi=lp64d \
++march=rv64imac/mabi=lp64/mcmodel=medany \
++march=rv64imafdc/mabi=lp64d/mcmodel=medany \
++march=rv64imafd/mabi=lp64d/mcmodel=medany
++MULTILIB_REUSE = march.rv32im/mabi.ilp32=march.rv32imc/mabi.ilp32 \
++march.rv32imafd/mabi.ilp32d=march.rv32imafdc/mabi.ilp32d \
++march.rv32imafd/mabi.ilp32d=march.rv32g/mabi.ilp32d \
++march.rv32imafd/mabi.ilp32d=march.rv32gc/mabi.ilp32d \
++march.rv64imafdc/mabi.lp64d=march.rv64gc/mabi.lp64d \
++march.rv64imafd/mabi.lp64d=march.rv64g/mabi.lp64d
+-- 
+2.11.0
+