From 49028fb110ffb19e5326879d7ec6245ebd0315d2 Mon Sep 17 00:00:00 2001
From: Maximilian Bosch <maximilian@mbosch.me>
Date: Mon, 23 Aug 2021 12:12:17 +0200
Subject: [PATCH] findutils: fix build w/glibc-2.34

This "-D__nonnull\\(params\\)=" leads to a compilation failure in e.g.
the configure phase:

    configure:21131: gcc -c -D__nonnull\(params\)=  conftest.c >&5
    <command-line>: warning: ISO C99 requires whitespace after the macro name
    <command-line>: error: stray '\' in program
    <command-line>: error: expected ',' or ';' before '(' token
    <command-line>: error: stray '\' in program

According to the commit this isn't even needed on Linux.

I confirmed that this is an (expectable) glibc-2.34 thing by checking
that

* the issue doesn't occur with gcc 10/11 on a recent glibc-2.33 staging.
* the issue DOES occur in a docker container with Fedora rawhide (which
  has glibc 2.34 and gcc 11).
---
 pkgs/tools/misc/findutils/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/tools/misc/findutils/default.nix b/pkgs/tools/misc/findutils/default.nix
index 3746c4b4657f..56d710c85454 100644
--- a/pkgs/tools/misc/findutils/default.nix
+++ b/pkgs/tools/misc/findutils/default.nix
@@ -40,7 +40,7 @@ stdenv.mkDerivation rec {
     "--localstatedir=/var/cache"
   ];
 
-  CFLAGS = [
+  CFLAGS = lib.optionals stdenv.isDarwin [
     # TODO: Revisit upstream issue https://savannah.gnu.org/bugs/?59972
     # https://github.com/Homebrew/homebrew-core/pull/69761#issuecomment-770268478
     "-D__nonnull\\(params\\)="