Add CC and CXX names to compilers passthru

bsc/intel-compiler/icc2020.nix

@@ -10,6 +10,11 @@ stdenv.mkDerivation rec {
   version = "${year}.${v_a}.${v_b}";
   name = "intel-compiler-${version}";
 
+  passthru = {
+    CC = "icc";
+    CXX = "icpc";
+  };
+
   # From Arch Linux PKGBUILD
   dir_nr="16526";
   year="2020";

bsc/llvm-ompss2/clang.nix

@@ -21,6 +21,11 @@ stdenv.mkDerivation rec {
   isClang = true;
   #isGNU = true;
 
+  passthru = {
+    CC = "clang";
+    CXX = "clang++";
+  };
+
   isClangWithOmpss = true;
 
   buildInputs = [

bsc/mcxx/default.nix

@@ -17,6 +17,11 @@ stdenv.mkDerivation rec {
   #version attribute ignored when using fetchgit:
   #version = "2.2.0-70a299cf";
 
+  passthru = {
+    CC = "mcc";
+    CXX = "mcxx";
+  };
+
   # Use patched Extrae version
   src = fetchgit {
     url = "https://github.com/bsc-pm/mcxx";