Merge pull request #147935 from risicle/ris-cppe-clang

cppe, python3Packages.cppe: fix build with clang

pkgs/development/libraries/science/chemistry/cppe/default.nix

···
-{ stdenv, lib, fetchFromGitHub, cmake }:
+{ stdenv, lib, fetchFromGitHub, cmake, llvmPackages }:
 
 stdenv.mkDerivation rec {
   pname = "cppe";
···
     sha256 = "sha256-guM7+ZWDJLcAUJtPkKLvC4LYSA2eBvER7cgwPZ7FxHw=";
   };
 
-  nativeBuildInputs = [ cmake ];
+  nativeBuildInputs = [ cmake ]
+    ++ lib.optionals stdenv.cc.isClang [ llvmPackages.openmp ];
 
   cmakeFlags = [ "-DCMAKE_INSTALL_LIBDIR=lib" ];
 

pkgs/development/python-modules/cppe/default.nix

···
 { buildPythonPackage
 , lib
+, stdenv
 , cmake
 , cppe
 , eigen
···
 , pandas
 , polarizationsolver
 , pytest
+, llvmPackages
 }:
 
 buildPythonPackage rec {
···
 
   dontUseCmakeConfigure = true;
 
-  buildInputs = [ pybind11 ];
+  buildInputs = [ pybind11 ]
+    ++ lib.optional stdenv.cc.isClang llvmPackages.openmp;
+
+  NIX_CFLAGS_LINK = lib.optional stdenv.cc.isClang "-lomp";
+
+  hardeningDisable = lib.optional stdenv.cc.isClang "strictoverflow";
 
   checkInputs = [
     pytest