treewide: rename bad filenames

Most of these can easily be moved to subdirectories of other
directories. This helps reduce clutter in the main trees.

pkgs/development/compilers/emscripten/fastcomp/emscripten-fastcomp.nix

@@ -0,0 +1,55 @@
+{ emscriptenVersion, stdenv, llvm, fetchFromGitHub, cmake, python, gtest, ... }:
+
+let
+  rev = emscriptenVersion;
+  gcc = if stdenv.cc.isGNU then stdenv.cc.cc else stdenv.cc.cc.gcc;
+in
+stdenv.mkDerivation rec {
+  name = "emscripten-fastcomp-${rev}";
+
+  src = fetchFromGitHub {
+    owner = "kripken";
+    repo = "emscripten-fastcomp";
+    sha256 = "04j698gmp686b5lricjakm5hyh2z2kh28m1ffkghmkyz4zkzmx98";
+    inherit rev;
+  };
+
+  srcFL = fetchFromGitHub {
+    owner = "kripken";
+    repo = "emscripten-fastcomp-clang";
+    sha256 = "1ici51mmpgg80xk3y8f376nbbfak6rz27qdy98l8lxkrymklp5g5";
+    inherit rev;
+  };
+
+  nativeBuildInputs = [ cmake python gtest ];
+  preConfigure = ''
+    cp -Lr ${srcFL} tools/clang
+    chmod +w -R tools/clang
+  '';
+  cmakeFlags = [
+    "-DCMAKE_BUILD_TYPE=Release"
+    "-DLLVM_TARGETS_TO_BUILD='X86;JSBackend'"
+    "-DLLVM_INCLUDE_EXAMPLES=OFF"
+    "-DLLVM_INCLUDE_TESTS=ON"
+    #"-DLLVM_CONFIG=${llvm}/bin/llvm-config"
+    "-DLLVM_BUILD_TESTS=ON"
+    "-DCLANG_INCLUDE_TESTS=ON"
+  ] ++ (stdenv.lib.optional stdenv.isLinux
+    # necessary for clang to find crtend.o
+    "-DGCC_INSTALL_PREFIX=${gcc}"
+  );
+  enableParallelBuilding = true;
+
+  passthru = {
+    isClang = true;
+    inherit gcc;
+  };
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/kripken/emscripten-fastcomp;
+    description = "Emscripten LLVM";
+    platforms = platforms.all;
+    maintainers = with maintainers; [ qknight matthewbauer ];
+    license = stdenv.lib.licenses.ncsa;
+  };
+}