From cb4e7fd9bc53b75f8aeaa00b7486b15a3557c790 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20=C4=8Cun=C3=A1t?= <v@cunat.cz>
Date: Mon, 23 May 2022 15:45:23 +0200
Subject: [PATCH] gdc: nicer eval failure from versions >= 12

12 will also be copied into future versions;
these parts seem OK to be copied by default.
---
 pkgs/development/compilers/gcc/12/default.nix | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/compilers/gcc/12/default.nix b/pkgs/development/compilers/gcc/12/default.nix
index fb76b039fb0a..13d040fc4957 100644
--- a/pkgs/development/compilers/gcc/12/default.nix
+++ b/pkgs/development/compilers/gcc/12/default.nix
@@ -3,6 +3,7 @@
 , langAda ? false
 , langObjC ? stdenv.targetPlatform.isDarwin
 , langObjCpp ? stdenv.targetPlatform.isDarwin
+, langD ? false
 , langGo ? false
 , reproducibleBuild ? true
 , profiledCompiler ? false
@@ -41,6 +42,10 @@ assert stdenv.hostPlatform.isDarwin -> gnused != null;
 assert langGo -> langCC;
 assert langAda -> gnatboot != null;
 
+# TODO: fixup D bootstapping, probably by using gdc11 (and maybe other changes).
+#   error: GDC is required to build d
+assert !langD;
+
 # threadsCross is just for MinGW
 assert threadsCross != null -> stdenv.targetPlatform.isWindows;
 
@@ -68,6 +73,7 @@ let majorVersion = "12";
         url = "https://github.com/fxcoudert/gcc/compare/releases/gcc-11.1.0...gcc-11.1.0-arm-20210504.diff";
         sha256 = "sha256-JqCGJAfbOxSmkNyq49aFHteK/RFsCSLQrL9mzUCnaD0=";
       })
+      ++ optional langD ../libphobos.patch
 
       # Obtain latest patch with ../update-mcfgthread-patches.sh
       ++ optional (!crossStageStatic && targetPlatform.isMinGW) ./Added-mcf-thread-model-support-from-mcfgthread.patch;
@@ -208,6 +214,7 @@ stdenv.mkDerivation ({
       enableShared
 
       langC
+      langD
       langCC
       langFortran
       langAda
@@ -248,14 +255,14 @@ stdenv.mkDerivation ({
 
   inherit
     (import ../common/extra-target-flags.nix {
-      inherit lib stdenv crossStageStatic libcCross threadsCross;
+      inherit lib stdenv crossStageStatic langD libcCross threadsCross;
     })
     EXTRA_FLAGS_FOR_TARGET
     EXTRA_LDFLAGS_FOR_TARGET
     ;
 
   passthru = {
-    inherit langC langCC langObjC langObjCpp langAda langFortran langGo version;
+    inherit langC langCC langObjC langObjCpp langAda langFortran langGo langD version;
     isGNU = true;
   };