From 6e27bab324ec1c6a394f319d1a7b575560bb1846 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Aleix=20Bon=C3=A9?= <aleix.boneribo@bsc.es>
Date: Fri, 31 Oct 2025 11:05:35 +0100
Subject: [PATCH] Set mpich default compilers from targetPackages

---
 pkgs/mpich/default.nix | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/pkgs/mpich/default.nix b/pkgs/mpich/default.nix
index 595e6ad2..90d26b77 100644
--- a/pkgs/mpich/default.nix
+++ b/pkgs/mpich/default.nix
@@ -12,6 +12,7 @@
 # For each arch
 , enableFortran ? stdenv.hostPlatform == stdenv.buildPlatform
 , perl
+, targetPackages
 }:
 
 let
@@ -45,10 +46,10 @@ in mpich.overrideAttrs (old: {
   ];
 
   preFixup = ''
-    sed -i 's:^CC=.*:CC=gcc:' $out/bin/mpicc
-    sed -i 's:^CXX=.*:CXX=g++:' $out/bin/mpicxx
+    sed -i 's:^CC=.*:CC=${targetPackages.stdenv.cc}/bin/${targetPackages.stdenv.cc.targetPrefix}cc:' $out/bin/mpicc
+    sed -i 's:^CXX=.*:CXX=${targetPackages.stdenv.cc}/bin/${targetPackages.stdenv.cc.targetPrefix}++:' $out/bin/mpicxx
   '' + lib.optionalString enableFortran ''
-    sed -i 's:^FC=.*:FC=gfortran:' $out/bin/mpifort
+    sed -i 's:^FC=.*:FC=${targetPackages.gfortran or gfortran}/bin/${targetPackages.gfortran.targetPrefix or gfortran.targetPrefix}gfortran:' $out/bin/mpifort
   '';
 
   hardeningDisable = [ "all" ];