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-rw-r--r--pkgs/development/compilers/llvm/7/clang/default.nix3
1 files changed, 1 insertions, 2 deletions
diff --git a/pkgs/development/compilers/llvm/7/clang/default.nix b/pkgs/development/compilers/llvm/7/clang/default.nix
index 18ea46ea39c..905ec862ad7 100644
--- a/pkgs/development/compilers/llvm/7/clang/default.nix
+++ b/pkgs/development/compilers/llvm/7/clang/default.nix
@@ -27,6 +27,7 @@ let
 
     cmakeFlags = [
       "-DCMAKE_CXX_FLAGS=-std=c++11"
+      "-DLLVM_ENABLE_RTTI=ON"
     ] ++ stdenv.lib.optionals enableManpages [
       "-DCLANG_INCLUDE_DOCS=ON"
       "-DLLVM_ENABLE_SPHINX=ON"
@@ -87,8 +88,6 @@ let
     passthru = {
       isClang = true;
       inherit llvm;
-    } // stdenv.lib.optionalAttrs (stdenv.targetPlatform.isLinux || (stdenv.cc.isGNU && stdenv.cc.cc ? gcc)) {
-      gcc = if stdenv.cc.isGNU then stdenv.cc.cc else stdenv.cc.cc.gcc;
     };
 
     meta = {