clangOmpss2: merge both nix files into one

Add clangOmpss2Git to the overlay overriding the src attribute of the
release nix derivation, so we only keep one derivation for both
variants.

bsc/llvm-ompss2/clang-git.nix

@@ -1,79 +0,0 @@
-{
-  stdenv
-, fetchgit
-, cmake
-, lld
-, bash
-, python3
-, perl
-, which
-, libelf
-, libffi
-, pkg-config
-, enableDebug ? true
-}:
-
-stdenv.mkDerivation rec {
-  version = "${src.shortRev}";
-  pname = "clang-ompss2";
-  enableParallelBuilding = true;
-  isClang = true;
-  #isGNU = true;
-
-  passthru = {
-    CC = "clang";
-    CXX = "clang++";
-  };
-
-  isClangWithOmpss = true;
-
-  buildInputs = [
-    which
-    bash
-    python3
-    perl
-    cmake
-    lld
-    libelf
-    libffi
-    pkg-config
-  ];
-
-  hardeningDisable = [ "fortify" ];
-
-  cmakeBuildType = if enableDebug then "Debug" else "Release";
-
-  dontUseCmakeBuildDir = true;
-  enableAssertions = if enableDebug then "ON" else "OFF";
-
-  preConfigure = ''
-    mkdir -p build
-    cd build
-    cmakeDir="../llvm"
-    cmakeFlagsArray=(
-      "-DLLVM_ENABLE_LLD=ON"
-      "-DCMAKE_CXX_FLAGS_DEBUG=-g -ggnu-pubnames"
-      "-DCMAKE_EXE_LINKER_FLAGS_DEBUG=-Wl,-gdb-index"
-      "-DLLVM_LIT_ARGS=-sv --xunit-xml-output=xunit.xml"
-      "-DLLVM_ENABLE_PROJECTS=clang;openmp;compiler-rt"
-      "-DLLVM_ENABLE_ASSERTIONS=${enableAssertions}"
-      "-DLLVM_INSTALL_TOOLCHAIN_ONLY=ON"
-    )
-  '';
-
-  # Remove support for GNU and Intel Openmp
-  postInstall = ''
-    rm $out/lib/libgomp*
-    rm $out/lib/libiomp*
-  '';
-
-# About "-DCLANG_DEFAULT_NANOS6_HOME=${nanos6}", we could specify a default
-# nanos6 installation, but this is would require a recompilation of clang each
-# time nanos6 is changed. Better to use the environment variable NANOS6_HOME,
-# and specify nanos6 at run time.
-
-  src = builtins.fetchGit {
-    url = "ssh://git@bscpm03.bsc.es/llvm-ompss/llvm-mono.git";
-    ref = "master";
-  };
-}

overlay.nix

@@ -61,11 +61,24 @@ let
       stdenv = bsc.llvmPackages.stdenv;
     };
 
+    clangOmpss2UnwrappedGit = bsc.clangOmpss2Unwrapped.overrideAttrs (old: rec {
+      src = builtins.fetchGit {
+        url = "ssh://git@bscpm03.bsc.es/llvm-ompss/llvm-mono.git";
+        ref = "master";
+      };
+      version = src.shortRev;
+    });
+
     clangOmpss2 = appendPasstru (
       callPackage ./bsc/llvm-ompss2/default.nix {
         clangOmpss2Unwrapped = bsc.clangOmpss2Unwrapped;
       }) { CC = "clang"; CXX = "clang++"; };
 
+    clangOmpss2Git = appendPasstru (
+      callPackage ./bsc/llvm-ompss2/default.nix {
+        clangOmpss2Unwrapped = bsc.clangOmpss2UnwrappedGit;
+      }) { CC = "clang"; CXX = "clang++"; };
+
     mcxx = bsc.mcxxRelease;
     mcxxRelease = callPackage ./bsc/mcxx/default.nix { };
     mcxxGit = callPackage ./bsc/mcxx/git.nix { };