uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/libraries/boehm-gc/default.nix

@@ -0,0 +1,66 @@
+{ lib, stdenv, fetchurl
+, autoreconfHook
+, enableLargeConfig ? false # doc: https://github.com/ivmai/bdwgc/blob/v8.0.6/doc/README.macros (LARGE_CONFIG)
+, nixVersions
+}:
+
+stdenv.mkDerivation rec {
+  pname = "boehm-gc";
+  version = "8.0.6";
+
+  src = fetchurl {
+    urls = [
+      "https://github.com/ivmai/bdwgc/releases/download/v${version}/gc-${version}.tar.gz"
+      "https://www.hboehm.info/gc/gc_source/gc-${version}.tar.gz"
+    ];
+    sha256 = "3b4914abc9fa76593596773e4da671d7ed4d5390e3d46fbf2e5f155e121bea11";
+  };
+
+  outputs = [ "out" "dev" "doc" ];
+  separateDebugInfo = stdenv.isLinux && stdenv.hostPlatform.libc != "musl";
+
+  # boehm-gc whitelists GCC threading models
+  patches = lib.optional stdenv.hostPlatform.isMinGW ./mcfgthread.patch;
+
+  configureFlags =
+    [ "--enable-cplusplus" "--with-libatomic-ops=none" ]
+    ++ lib.optional enableLargeConfig "--enable-large-config";
+
+  nativeBuildInputs =
+    lib.optional stdenv.hostPlatform.isMinGW autoreconfHook;
+
+  doCheck = true; # not cross;
+
+  enableParallelBuilding = true;
+
+  passthru.tests = nixVersions;
+
+  meta = {
+    description = "The Boehm-Demers-Weiser conservative garbage collector for C and C++";
+
+    longDescription = ''
+      The Boehm-Demers-Weiser conservative garbage collector can be used as a
+      garbage collecting replacement for C malloc or C++ new.  It allows you
+      to allocate memory basically as you normally would, without explicitly
+      deallocating memory that is no longer useful.  The collector
+      automatically recycles memory when it determines that it can no longer
+      be otherwise accessed.
+
+      The collector is also used by a number of programming language
+      implementations that either use C as intermediate code, want to
+      facilitate easier interoperation with C libraries, or just prefer the
+      simple collector interface.
+
+      Alternatively, the garbage collector may be used as a leak detector for
+      C or C++ programs, though that is not its primary goal.
+    '';
+
+    homepage = "https://hboehm.info/gc/";
+
+    # non-copyleft, X11-style license
+    license = "https://hboehm.info/gc/license.txt";
+
+    maintainers = [ ];
+    platforms = lib.platforms.all;
+  };
+}

pkgs/development/libraries/boehm-gc/mcfgthread.patch

@@ -0,0 +1,11 @@
+--- a/configure.ac
++++ b/configure.ac
+@@ -277,7 +277,7 @@ case "$THREADS" in
+         ;;
+     esac
+     ;;
+- win32)
++ win32 | mcf)
+     AC_DEFINE(GC_THREADS)
+     use_parallel_mark=$enable_parallel_mark
+     if test "${enable_parallel_mark}" != no \