From 57f0574595160eeffae999e0fbed2cabfafbfda1 Mon Sep 17 00:00:00 2001
From: Michael Weiss <dev.primeos@gmail.com>
Date: Tue, 11 Aug 2020 18:09:05 +0200
Subject: [PATCH] cmake: Add a patch to fix a regression since CMake 3.18

This fixes all CMake builds that use target_precompile_headers() and
as a result fail since CMake 3.18 with e.g.:
g++: error: unrecognized command line option '-Xarch_x86_64'; did you mean '-march=x86-64'?

Fix #94905.

CMake references:
- https://gitlab.kitware.com/cmake/cmake/-/issues/21072
- https://gitlab.kitware.com/cmake/cmake/-/merge_requests/5118
---
 pkgs/development/tools/build-managers/cmake/default.nix | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/tools/build-managers/cmake/default.nix b/pkgs/development/tools/build-managers/cmake/default.nix
index 0b296f023adc9d..3ae9fe6f42c9df 100644
--- a/pkgs/development/tools/build-managers/cmake/default.nix
+++ b/pkgs/development/tools/build-managers/cmake/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, pkgconfig
+{ stdenv, lib, fetchurl, pkgconfig, fetchpatch
 , bzip2, curl, expat, libarchive, xz, zlib, libuv, rhash
 , buildPackages
 # darwin attributes
@@ -37,6 +37,12 @@ stdenv.mkDerivation rec {
     # Derived from https://github.com/libuv/libuv/commit/1a5d4f08238dd532c3718e210078de1186a5920d
     ./libuv-application-services.patch
 
+    # TODO: Remove this patch for a regression once CMake 3.18.2 is out:
+    (fetchpatch { # PCH: Avoid Apple-specific architecture flags on other platforms
+      url = "https://gitlab.kitware.com/cmake/cmake/-/commit/70ce1ad64a04a244bb1c03753da0752c61fc3a37.patch";
+      sha256 = "0jcdgv48j0dd4nlhyy3j0s3h6bcbrq2yg1mdhpgfqrb2y3p91fky";
+    })
+
   ] ++ lib.optional stdenv.isCygwin ./3.2.2-cygwin.patch;
 
   outputs = [ "out" ];