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/science/math/p4est-sc/default.nix

@@ -0,0 +1,72 @@
+{ lib, stdenv, fetchFromGitHub
+, autoreconfHook, pkg-config
+, p4est-sc-debugEnable ? true, p4est-sc-mpiSupport ? true
+, mpi, openssh, zlib
+}:
+
+let
+  dbg = if debugEnable then "-dbg" else "";
+  debugEnable = p4est-sc-debugEnable;
+  mpiSupport = p4est-sc-mpiSupport;
+  isOpenmpi = mpiSupport && mpi.pname == "openmpi";
+in
+stdenv.mkDerivation {
+  pname = "p4est-sc${dbg}";
+  version = "unstable-2021-06-14";
+
+  # fetch an untagged snapshot of the prev3-develop branch
+  src = fetchFromGitHub {
+    owner = "cburstedde";
+    repo = "libsc";
+    rev = "1ae814e3fb1cc5456652e0d77550386842cb9bfb";
+    sha256 = "14vm0b162jh8399pgpsikbwq4z5lkrw9vfzy3drqykw09n6nc53z";
+  };
+
+  strictDeps = true;
+  nativeBuildInputs = [ autoreconfHook pkg-config ];
+  propagatedNativeBuildInputs = lib.optional mpiSupport mpi
+    ++ lib.optional isOpenmpi openssh
+  ;
+  propagatedBuildInputs = [ zlib ];
+  inherit debugEnable mpiSupport;
+
+  postPatch = ''
+    echo "dist_scaclocal_DATA += config/sc_v4l2.m4" >> Makefile.am
+  '';
+  preConfigure = ''
+    echo "2.8.0" > .tarball-version
+    ${if mpiSupport then "unset CC" else ""}
+  '';
+
+  configureFlags = [ "--enable-pthread=-pthread" ]
+    ++ lib.optional debugEnable "--enable-debug"
+    ++ lib.optional mpiSupport "--enable-mpi"
+  ;
+
+  dontDisableStatic = true;
+  enableParallelBuilding = true;
+  makeFlags = [ "V=0" ];
+
+  preCheck = ''
+    export OMPI_MCA_rmaps_base_oversubscribe=1
+    export HYDRA_IFACE=lo
+  '';
+
+  # disallow Darwin checks due to prototype incompatibility of qsort_r
+  # to be fixed in a future version of the source code
+  doCheck = !stdenv.isDarwin && stdenv.hostPlatform == stdenv.buildPlatform;
+
+  meta = {
+    branch = "prev3-develop";
+    description = "Support for parallel scientific applications";
+    longDescription = ''
+      The SC library provides support for parallel scientific applications.
+      Its main purpose is to support the p4est software library, hence
+      this package is called p4est-sc, but it works standalone, too.
+    '';
+    homepage = "https://www.p4est.org/";
+    downloadPage = "https://github.com/cburstedde/libsc.git";
+    license = lib.licenses.lgpl21Plus;
+    maintainers = [ lib.maintainers.cburstedde ];
+  };
+}