From ec87e38d65d4ea1fa7ab76c7efe70098e36769d0 Mon Sep 17 00:00:00 2001
From: Thomas Watson <twatson52@icloud.com>
Date: Wed, 4 May 2022 23:11:45 -0500
Subject: [PATCH] Revert "gcc: 11.2.0 -> 11.3.0" for aarch64-darwin

Patches to support GCC 11.3.0 on aarch64-darwin are not available. Homebrew
also is skipping the 11.3.0 upgrade.
---
 pkgs/development/compilers/gcc/11/default.nix | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/compilers/gcc/11/default.nix b/pkgs/development/compilers/gcc/11/default.nix
index 74050506202..ba4b10cf73e 100644
--- a/pkgs/development/compilers/gcc/11/default.nix
+++ b/pkgs/development/compilers/gcc/11/default.nix
@@ -52,7 +52,12 @@ with lib;
 with builtins;
 
 let majorVersion = "11";
-    version = "${majorVersion}.3.0";
+    # The patch below for aarch64-darwin does not apply to 11.3.0 and an
+    # updated version is not available. Keep aarch64-darwin on 11.2.0 so the
+    # large body of packages which depend on gfortran are still functional
+    # until GCC 12 is the default.
+    version = if (stdenv.isDarwin && stdenv.isAarch64) then
+      "${majorVersion}.2.0" else "${majorVersion}.3.0";
 
     inherit (stdenv) buildPlatform hostPlatform targetPlatform;
 
@@ -91,7 +96,9 @@ stdenv.mkDerivation ({
 
   src = fetchurl {
     url = "mirror://gcc/releases/gcc-${version}/gcc-${version}.tar.xz";
-    sha256 = "sha256-tHzygYaR9bHiHfK7OMeV+sLPvWQO3i0KXhyJ4zijrDk=";
+    sha256 = if (stdenv.isDarwin && stdenv.isAarch64)
+      then "sha256-0I7cU2tUw3KhAQ/2YZ3SdMDxYDqkkhK6IPeqLNo2+os="
+      else "sha256-tHzygYaR9bHiHfK7OMeV+sLPvWQO3i0KXhyJ4zijrDk=";
   };
 
   inherit patches;