gnugrep: patch against loongarch64-linux

pkgs/tools/text/gnugrep/default.nix

@@ -1,4 +1,4 @@
-{ 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
@@ -16,8 +16,11 @@ stdenv.mkDerivation {
     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 ];

pkgs/tools/text/gnugrep/sigsegv-loongarch.patch

@@ -0,0 +1,31 @@
+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 | \
+-- 
+cgit v1.1