Working stdenv with clang+ompss2

bsc/cpic/default.nix

@@ -27,12 +27,12 @@ stdenv.mkDerivation rec {
 #  };
 
   postConfigure = ''
-    env | grep NIX
+    env
   '';
 
 
+#    export NANOS6_HOME="${nanos6}"
   preConfigure = ''
-    export NANOS6_HOME="${nanos6}"
     export TAMPI_HOME="${tampi}"
   '';
 

bsc/llvm-ompss2/clang.nix

@@ -0,0 +1,68 @@
+{
+  stdenv
+, fetchgit
+, cmake
+, lld
+, bash
+, python3
+, perl
+, clang
+, which
+, libelf
+, libffi
+, pkg-config
+, enableDebug ? true
+}:
+
+stdenv.mkDerivation rec {
+  version = "11.0.0";
+  pname = "clang-ompss2";
+  enableParallelBuilding = true;
+  #isClang = true;
+  #isGNU = true;
+
+  isClangWithOmpss = true;
+
+  buildInputs = [
+    which
+    clang
+    bash
+    python3
+    perl
+    cmake
+    lld
+    libelf
+    libffi
+    pkg-config
+  ];
+
+  cmakeBuildType = if enableDebug then "Debug" else "Release";
+
+  dontUseCmakeBuildDir = true;
+
+  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"
+      "-DLLVM_ENABLE_ASSERTIONS=ON"
+      "-DLLVM_INSTALL_TOOLCHAIN_ONLY=ON"
+    )
+  '';
+
+# 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 = "git@bscpm02.bsc.es:llvm-ompss/llvm-mono.git";
+    rev = "38e2e6aac04d40b6b2823751ce25f6b414f52263";
+    ref = "master";
+  };
+}

bsc/llvm-ompss2/default.nix

@@ -1,63 +1,27 @@
 {
   stdenv
-, fetchgit
-, cmake
-, lld
-, bash
-, python3
-, perl
-, clang
-, which
-, libelf
-, libffi
-, pkg-config
-, enableDebug ? true
+, gcc
+, nanos6
+, clang-ompss2-unwrapped
+, wrapCCWith
+, libstdcxxHook
 }:
 
-stdenv.mkDerivation rec {
-  version = "11.0.0";
-  pname = "clang-ompss2";
-  enableParallelBuilding = true;
-  isClang = true;
-  isGNU = true;
 
-  isClangWithOmpss = true;
+let
+  targetConfig = stdenv.targetPlatform.config;
+  inherit gcc nanos6;
+in wrapCCWith rec {
+  cc = clang-ompss2-unwrapped;
+  extraPackages = [ libstdcxxHook ];
+  extraBuildCommands = ''
+    echo "-target ${targetConfig}" >> $out/nix-support/cc-cflags
+    echo "-B${gcc.cc}/lib/gcc/${targetConfig}/${gcc.version}" >> $out/nix-support/cc-cflags
+    echo "-L${gcc.cc}/lib/gcc/${targetConfig}/${gcc.version}" >> $out/nix-support/cc-ldflags
+    echo "-L${gcc.cc.lib}/${targetConfig}/lib" >> $out/nix-support/cc-ldflags
+    echo "--gcc-toolchain=${gcc}" >> $out/nix-support/cc-cflags
 
-  buildInputs = [
-    which
-    clang
-    bash
-    python3
-    perl
-    cmake
-    lld
-    libelf
-    libffi
-    pkg-config
-  ];
-
-  cmakeBuildType = if enableDebug then "Debug" else "Release";
-
-  dontUseCmakeBuildDir = true;
-
-  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"
-      "-DLLVM_ENABLE_ASSERTIONS=ON"
-      "-DLLVM_INSTALL_TOOLCHAIN_ONLY=ON"
-    )
+    echo "# Hack to include NANOS6_HOME" >> $out/nix-support/setup-hook
+    echo "export NANOS6_HOME=${nanos6}" >> $out/nix-support/setup-hook
   '';
-
-  src = builtins.fetchGit {
-    url = "git@bscpm02.bsc.es:llvm-ompss/llvm-mono.git";
-    rev = "38e2e6aac04d40b6b2823751ce25f6b414f52263";
-    ref = "master";
-  };
 }