From 4b1d4c18af60879b61a79bb8c85d9167f600db32 Mon Sep 17 00:00:00 2001
From: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>
Date: Fri, 1 Sep 2023 16:44:17 +0200
Subject: [PATCH] Set the host triple in clang

Fixes the problem where the triple used by newer versions of
config.guess don't match due to a change in x86 from
x86_64-unknown-linux-gnu to x86_64-pc-linux-gnu.
---
 bsc/llvm-ompss2/clang.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/bsc/llvm-ompss2/clang.nix b/bsc/llvm-ompss2/clang.nix
index a1b05a6..13683f5 100644
--- a/bsc/llvm-ompss2/clang.nix
+++ b/bsc/llvm-ompss2/clang.nix
@@ -62,11 +62,14 @@ stdenv.mkDerivation rec {
   dontUseCmakeBuildDir = true;
   enableAssertions = if enableDebug then "ON" else "OFF";
 
+  # Fix the host triple, as it has changed in a newer config.guess:
+  # https://git.savannah.gnu.org/gitweb/?p=config.git;a=commitdiff;h=ca9bfb8cc75a2be1819d89c664a867785c96c9ba
   preConfigure = ''
     mkdir -p build
     cd build
     cmakeDir="../llvm"
     cmakeFlagsArray=(
+      "-DLLVM_HOST_TRIPLE=${stdenv.targetPlatform.config}"
       "-DLLVM_ENABLE_LLD=ON"
       "-DCMAKE_CXX_FLAGS_DEBUG=-g -ggnu-pubnames"
       "-DCMAKE_EXE_LINKER_FLAGS_DEBUG=-Wl,-gdb-index"