From bf5d835e6e3593e0dca4926a70cc84f6b958dca5 Mon Sep 17 00:00:00 2001
From: qbisi <qbisicwate@gmail.com>
Date: Thu, 24 Oct 2024 07:37:00 +0800
Subject: [PATCH] mumps: install mumps libseq headers to include/mumps_seq

Directory libseq contains dummy MPI/BLACS/ScaLAPACK symbols to allow
linking/running MUMPS on a platform where MPI is not installed.
The install directory name mumps_seq comes from Debian source package
and Aur pkgbuild. See
- https://sources.debian.org/src/mumps/5.7.3-2/debian/libmumps-headers-dev.install
- https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=mumps-seq
---
 pkgs/by-name/mu/mumps/package.nix | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pkgs/by-name/mu/mumps/package.nix b/pkgs/by-name/mu/mumps/package.nix
index e031266cd857..0b078b97d281 100644
--- a/pkgs/by-name/mu/mumps/package.nix
+++ b/pkgs/by-name/mu/mumps/package.nix
@@ -47,9 +47,12 @@ stdenv.mkDerivation (finalAttrs: {
     mkdir $out
     cp -r include lib $out
 
+    # Install mumps_seq headers
+    install -Dm 444 -t $out/include/mumps_seq libseq/*.h
+
     # Add some compatibility with coin-or-mumps
     ln -s $out/include $out/include/mumps
-    cp libseq/mpi.h $out/include/mumps_mpi.h
+    ln -s $out/include/mumps_seq/mpi.h $out/include/mumps_mpi.h
   '';
 
   nativeBuildInputs = [ gfortran ];