gnugrep: patch against loongarch64-linux

{ lib, stdenv, fetchurl, pcre, libiconv, perl }:

{ lib, stdenv, fetchurl, pcre, libiconv, perl, autoreconfHook }:

# Note: this package is used for bootstrapping fetchurl, and thus

# cannot use fetchpatch! All mutable patches (generated by GitHub or

    sha256 = "0g42svbc1nq5bamxfj6x7320wli4dlj86padk0hwgbk04hqxl42w";

  };

  # https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=b50c6442e43d79471a31a2a202d3e50c0557446f

  patches = lib.optional stdenv.hostPlatform.isLoongArch64 ./sigsegv-loongarch.patch;

  # Perl is needed for testing

  nativeBuildInputs = [ perl ];

  nativeBuildInputs = [ perl ] ++ lib.optional stdenv.hostPlatform.isLoongArch64 autoreconfHook;

  outputs = [ "out" "info" ]; # the man pages are rather small

  buildInputs = [ pcre libiconv ];

From b50c6442e43d79471a31a2a202d3e50c0557446f Mon Sep 17 00:00:00 2001

From: Sun Haiyong <youbest@sina.com>

Date: Sat, 4 Sep 2021 15:06:43 +0200

Subject: sigsegv: Improve cross-compilation support for LoongArch CPU.

* m4/stack-direction.m4 (SV_STACK_DIRECTION): Assume the stack grows

down on LoongArch.

---

 m4/stack-direction.m4 | 3 ++-

 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/m4/stack-direction.m4 b/m4/stack-direction.m4

index 9328725..e682be9 100644

--- a/m4/stack-direction.m4

+++ b/m4/stack-direction.m4

@@ -1,4 +1,4 @@

-# stack-direction.m4 serial 7

+# stack-direction.m4 serial 8

 dnl Copyright (C) 2002-2021 Free Software Foundation, Inc.

 dnl This file is free software, distributed under the terms of the GNU

 dnl General Public License.  As a special exception to the GNU General

@@ -32,6 +32,7 @@ AC_DEFUN([SV_STACK_DIRECTION],

       i?86 | x86_64 | \

       i860 | \

       ia64 | \

+      loongarch* | \

       m32r | \

       m68* | \

       m88k | \

-- 

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