cc-wrapper: externalize default_cxx_stdlib_compile

This value is require to get c++ std include path for libclang based tools (vim plugins in my case). I currently extract it this with this rather command: ``` eval echo $(nix-instantiate --eval --expr 'with (import <nixpkgs>) {}; clang.default_cxx_stdlib_compile') ``` it did not trigger any recompilation on my system.
2017-06-08 19:50:40 +01:00
parent 3cb5d52dac
commit e2197465c1
3 changed files with 20 additions and 6 deletions
@@ -1,3 +1,10 @@
+    # In addition to the arguments you pass to your compiler, you also need to
+    # specify the path of the C++ std header (if you are using C++).
+    # These usually implicitly set by cc-wrapper around clang (pkgs/build-support/cc-wrapper).
+    # The linked ruby code shows generates the required '.clang_complete' for cmake based projects
+    # https://gist.github.com/Mic92/135e83803ed29162817fce4098dec144
+    # as an alternative you can execute the following command:
+    # $ eval echo $(nix-instantiate --eval --expr 'with (import <nixpkgs>) {}; clang.default_cxx_stdlib_compile')
    preFixup = ''
      substituteInPlace "$out"/share/vim-plugins/clang_complete/plugin/clang_complete.vim \
        --replace "let g:clang_library_path = '' + "''" + ''" "let g:clang_library_path='${llvmPackages.clang.cc}/lib/libclang.so'"