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Re: [PATCH] [RISCV] Add RTEMS support
- From: Palmer Dabbelt <palmer at dabbelt dot com>
- To: kito dot cheng at gmail dot com
- Cc: sebastian dot huber at embedded-brains dot de, Andrew Waterman <andrew at sifive dot com>, gcc-patches at gcc dot gnu dot org
- Date: Thu, 27 Jul 2017 10:01:05 -0700 (PDT)
- Subject: Re: [PATCH] [RISCV] Add RTEMS support
- Authentication-results: sourceware.org; auth=none
It appears to work for me: I can generate a simple no-op executable and link it
with multilib. I don't know anything about RTEMS, so I'm just going to trust
it'll actually work :). We're not going to have bandwidth to test this, but if
you're interested there's some support for running the GCC test suite in our
super-repo
https://github.com/riscv/riscv-gnu-toolchain
I committed the patch as
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=250632
Thanks a bunch!
On Thu, 27 Jul 2017 07:12:42 PDT (-0700), kito.cheng@gmail.com wrote:
> Hi Sebastian:
> LGTM, I've test riscv32-rtems-gcc is buildable.
>
> Thanks for you patch :)
>
> Hi Palmer:
> Could you help to commit this patch ?
>
> Thanks.
>
> On Thu, Jul 27, 2017 at 7:05 PM, Sebastian Huber
> <sebastian.huber@embedded-brains.de> wrote:
>> gcc/
>> * config.gcc (riscv*-*-elf*): Add (riscv*-*-rtems*).
>> * config/riscv/rtems.h: New file.
>> ---
>> gcc/config.gcc | 7 ++++++-
>> gcc/config/riscv/rtems.h | 31 +++++++++++++++++++++++++++++++
>> 2 files changed, 37 insertions(+), 1 deletion(-)
>> create mode 100644 gcc/config/riscv/rtems.h
>>
>> diff --git a/gcc/config.gcc b/gcc/config.gcc
>> index aab7f65c1df..f28164646c3 100644
>> --- a/gcc/config.gcc
>> +++ b/gcc/config.gcc
>> @@ -2040,7 +2040,7 @@ riscv*-*-linux*)
>> # automatically detect that GAS supports it, yet we require it.
>> gcc_cv_initfini_array=yes
>> ;;
>> -riscv*-*-elf*)
>> +riscv*-*-elf* | riscv*-*-rtems*)
>> tm_file="elfos.h newlib-stdint.h ${tm_file} riscv/elf.h"
>> case "x${enable_multilib}" in
>> xno) ;;
>> @@ -2053,6 +2053,11 @@ riscv*-*-elf*)
>> # Force .init_array support. The configure script cannot always
>> # automatically detect that GAS supports it, yet we require it.
>> gcc_cv_initfini_array=yes
>> + case ${target} in
>> + riscv*-*-rtems*)
>> + tm_file="${tm_file} rtems.h riscv/rtems.h"
>> + ;;
>> + esac
>> ;;
>> mips*-*-netbsd*) # NetBSD/mips, either endian.
>> target_cpu_default="MASK_ABICALLS"
>> diff --git a/gcc/config/riscv/rtems.h b/gcc/config/riscv/rtems.h
>> new file mode 100644
>> index 00000000000..221e2f69815
>> --- /dev/null
>> +++ b/gcc/config/riscv/rtems.h
>> @@ -0,0 +1,31 @@
>> +/* Definitions for RISC-V RTEMS systems with ELF format.
>> + Copyright (C) 2017 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.
>> +
>> + Under Section 7 of GPL version 3, you are granted additional
>> + permissions described in the GCC Runtime Library Exception, version
>> + 3.1, as published by the Free Software Foundation.
>> +
>> + You should have received a copy of the GNU General Public License and
>> + a copy of the GCC Runtime Library Exception along with this program;
>> + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
>> + <http://www.gnu.org/licenses/>. */
>> +
>> +#undef TARGET_OS_CPP_BUILTINS
>> +#define TARGET_OS_CPP_BUILTINS() \
>> + do { \
>> + builtin_define ("__rtems__"); \
>> + builtin_define ("__USE_INIT_FINI__"); \
>> + builtin_assert ("system=rtems"); \
>> + } while (0)
>> --
>> 2.12.3
>>