From 42feb53c861ed4cf4d07830e2cbed851c530ccee Mon Sep 17 00:00:00 2001
From: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>
Date: Fri, 21 Jun 2024 11:30:29 +0200
Subject: [PATCH] Cross compile for ARMv7, Aarch64 and RISC-V 64

Adds CI cross-compilation tests for those architectures. Requires the
host to be able to run thos binaries via binfmt.

See: https://docs.kernel.org/admin-guide/binfmt-misc.html
---
 .gitlab-ci.yml | 21 +++++++++++++++++++++
 flake.nix      | 27 +++++++++++++++++++++++++++
 2 files changed, 48 insertions(+)

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9f82903..118da17 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -55,3 +55,24 @@ build:compilers:
     - nix
   script:
     - nix build -L --no-link .#ovniPackages.compilers
+
+build:armv7:
+  stage: build
+  tags:
+    - nix
+  script:
+    - nix build -L --no-link .#ovniPackages.armv7
+
+build:aarch64:
+  stage: build
+  tags:
+    - nix
+  script:
+    - nix build -L --no-link .#ovniPackages.aarch64
+
+build:riscv64:
+  stage: build
+  tags:
+    - nix
+  script:
+    - nix build -L --no-link .#ovniPackages.riscv64
diff --git a/flake.nix b/flake.nix
index 07230fd..7b3b10b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -135,6 +135,33 @@
           export ASAN_OPTIONS=detect_leaks=0
         '';
       });
+
+      armv7 = (pkgs.pkgsCross.armv7l-hf-multiplatform.ovniLocal.overrideAttrs (old: {
+        pname = "ovni-armv7";
+        buildInputs = [];
+        nativeBuildInputs = [ pkgs.pkgsCross.armv7l-hf-multiplatform.buildPackages.cmake ];
+        cmakeFlags = old.cmakeFlags ++ [ "-DUSE_MPI=OFF" ];
+      })).overrideDerivation (old: {
+        doCheck = true;
+      });
+
+      aarch64 = (pkgs.pkgsCross.aarch64-multiplatform.ovniLocal.overrideAttrs (old: {
+        pname = "ovni-aarch64";
+        buildInputs = [];
+        nativeBuildInputs = [ pkgs.pkgsCross.aarch64-multiplatform.buildPackages.cmake ];
+        cmakeFlags = old.cmakeFlags ++ [ "-DUSE_MPI=OFF" ];
+      })).overrideDerivation (old: {
+        doCheck = true;
+      });
+
+      riscv64 = (pkgs.pkgsCross.riscv64.ovniLocal.overrideAttrs (old: {
+        pname = "ovni-riscv64";
+        buildInputs = [];
+        nativeBuildInputs = [ pkgs.pkgsCross.riscv64.buildPackages.cmake ];
+        cmakeFlags = old.cmakeFlags ++ [ "-DUSE_MPI=OFF" ];
+      })).overrideDerivation (old: {
+        doCheck = true;
+      });
     };
   };
 }