rtags: Fix configure phase errors

Add pkgconfig as buildinput, so that the install path is correctly set
with cmake. PkgConfig is an optional dependency for rtags, but they
say it's necessary if you want to replace the prefix with
CMAKE_INSTALL_PREFIX. See:
https://github.com/Andersbakken/rtags/blob/caad9ac494f09960bd60a00061279efacc8d1d26/cmake/BashCompletion.cmake#L13

Furthermore, I let the configurePhase of the rtags emacs package be a
noop.

1 files changed, 7 insertions, 7 deletions

diff --git a/pkgs/development/tools/rtags/default.nix b/pkgs/development/tools/rtags/default.nix
index 39ee3179e9c..1825bbe81c3 100644
--- a/pkgs/development/tools/rtags/default.nix
+++ b/pkgs/development/tools/rtags/default.nix
@@ -1,17 +1,12 @@
-{ stdenv, lib, fetchgit, cmake, llvmPackages, openssl, writeScript, apple_sdk, bash, emacs }:
+{ stdenv, lib, fetchgit, cmake, llvmPackages, openssl, writeScript, apple_sdk, bash, emacs, pkgconfig }:
 
 stdenv.mkDerivation rec {
   name = "rtags-${version}";
   version = "2.12";
 
-  buildInputs = [ cmake llvmPackages.llvm openssl llvmPackages.clang emacs ]
+  buildInputs = [ cmake llvmPackages.llvm openssl llvmPackages.clang emacs pkgconfig ]
     ++ lib.optionals stdenv.isDarwin [ apple_sdk.libs.xpc apple_sdk.frameworks.CoreServices ];
 
-  preConfigure = ''
-    export LIBCLANG_CXXFLAGS="-isystem ${llvmPackages.clang.cc}/include $(llvm-config --cxxflags) -fexceptions" \
-           LIBCLANG_LIBDIR="${llvmPackages.clang.cc}/lib"
-  '';
-
 
   src = fetchgit {
     rev = "refs/tags/v${version}";
@@ -25,6 +20,11 @@ stdenv.mkDerivation rec {
     '';
   };
 
+  preConfigure = ''
+    export LIBCLANG_CXXFLAGS="-isystem ${llvmPackages.clang.cc}/include $(llvm-config --cxxflags) -fexceptions" \
+           LIBCLANG_LIBDIR="${llvmPackages.clang.cc}/lib"
+  '';
+
   enableParallelBuilding = true;
 
   meta = {