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/gmp/4.3.2.nix

@@ -0,0 +1,76 @@
+{ lib, stdenv, fetchurl, m4, cxx ? true }:
+
+let self = stdenv.mkDerivation rec {
+  pname = "gmp";
+  version = "4.3.2";
+
+  src = fetchurl {
+    url = "mirror://gnu/gmp/gmp-${version}.tar.bz2";
+    sha256 = "0x8prpqi9amfcmi7r4zrza609ai9529pjaq0h4aw51i867064qck";
+  };
+
+  #outputs TODO: split $cxx due to libstdc++ dependency
+  # maybe let ghc use a version with *.so shared with rest of nixpkgs and *.a added
+  # - see #5855 for related discussion
+  outputs = [ "out" "dev" "info" ];
+  passthru.static = self.out;
+
+  nativeBuildInputs = [ m4 ];
+
+  # Prevent the build system from using sub-architecture-specific
+  # instructions (e.g., SSE2 on i686).
+  #
+  # This is not a problem for Apple machines, which are all alike.  In
+  # addition, `configfsf.guess' would return `i386-apple-darwin10.2.0' on
+  # `x86_64-darwin', leading to a 32-bit ABI build, which is undesirable.
+  preConfigure =
+    if !stdenv.isDarwin
+    then "ln -sf configfsf.guess config.guess"
+    else ''echo "Darwin host is `./config.guess`."'';
+
+  configureFlags = [
+    (lib.enableFeature cxx "cxx")
+  ] ++ lib.optionals stdenv.isDarwin [
+    "ac_cv_build=x86_64-apple-darwin13.4.0"
+    "ac_cv_host=x86_64-apple-darwin13.4.0"
+  ];
+
+  # The test t-lucnum_ui fails (on Linux/x86_64) when built with GCC 4.8.
+  # Newer versions of GMP don't have that issue anymore.
+  doCheck = false;
+
+  meta = {
+    branch = "4";
+    description = "GNU multiple precision arithmetic library";
+
+    longDescription =
+      '' GMP is a free library for arbitrary precision arithmetic, operating
+         on signed integers, rational numbers, and floating point numbers.
+         There is no practical limit to the precision except the ones implied
+         by the available memory in the machine GMP runs on.  GMP has a rich
+         set of functions, and the functions have a regular interface.
+
+         The main target applications for GMP are cryptography applications
+         and research, Internet security applications, algebra systems,
+         computational algebra research, etc.
+
+         GMP is carefully designed to be as fast as possible, both for small
+         operands and for huge operands.  The speed is achieved by using
+         fullwords as the basic arithmetic type, by using fast algorithms,
+         with highly optimised assembly code for the most common inner loops
+         for a lot of CPUs, and by a general emphasis on speed.
+
+         GMP is faster than any other bignum library.  The advantage for GMP
+         increases with the operand sizes for many operations, since GMP uses
+         asymptotically faster algorithms.
+      '';
+
+    homepage = "https://gmplib.org/";
+    license = lib.licenses.lgpl3Plus;
+
+    maintainers = [ ];
+    platforms = lib.platforms.all;
+    badPlatforms = [ "x86_64-darwin" ];
+  };
+};
+  in self