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/os-specific/linux/kernel/perf.nix

@@ -0,0 +1,82 @@
+{ lib, stdenv, kernel, elfutils, python2, python3, perl, newt, slang, asciidoc, xmlto, makeWrapper
+, docbook_xsl, docbook_xml_dtd_45, libxslt, flex, bison, pkg-config, libunwind, binutils-unwrapped
+, libiberty, audit, libbfd, libopcodes, openssl, systemtap, numactl
+, zlib
+, withGtk ? false, gtk2
+, withZstd ? true, zstd
+, withLibcap ? true, libcap
+}:
+
+with lib;
+
+stdenv.mkDerivation {
+  pname = "perf-linux";
+  version = kernel.version;
+
+  inherit (kernel) src;
+
+  preConfigure = ''
+    cd tools/perf
+
+    substituteInPlace Makefile \
+      --replace /usr/include/elfutils $elfutils/include/elfutils
+
+    for x in util/build-id.c util/dso.c; do
+      substituteInPlace $x --replace /usr/lib/debug /run/current-system/sw/lib/debug
+    done
+
+    if [ -f bash_completion ]; then
+      sed -i 's,^have perf,_have perf,' bash_completion
+    fi
+  '';
+
+  makeFlags = ["prefix=$(out)" "WERROR=0"] ++ kernel.makeFlags;
+
+  hardeningDisable = [ "format" ];
+
+  # perf refers both to newt and slang
+  nativeBuildInputs = [
+    asciidoc xmlto docbook_xsl docbook_xml_dtd_45 libxslt
+    flex bison libiberty audit makeWrapper pkg-config python3
+  ];
+  buildInputs = [
+    elfutils newt slang libunwind libbfd zlib openssl systemtap.stapBuild numactl
+    libopcodes python3 perl
+  ] ++ lib.optional withGtk gtk2
+    ++ (if (versionAtLeast kernel.version "4.19") then [ python3 ] else [ python2 ])
+    ++ lib.optional withZstd zstd
+    ++ lib.optional withLibcap libcap;
+
+  # Note: we don't add elfutils to buildInputs, since it provides a
+  # bad `ld' and other stuff.
+  NIX_CFLAGS_COMPILE = toString [
+    "-Wno-error=cpp"
+    "-Wno-error=bool-compare"
+    "-Wno-error=deprecated-declarations"
+    "-Wno-error=stringop-truncation"
+  ];
+
+  postPatch = ''
+    patchShebangs scripts
+  '';
+
+  doCheck = false; # requires "sparse"
+  doInstallCheck = false; # same
+
+  separateDebugInfo = true;
+  installFlags = [ "install" "install-man" "ASCIIDOC8=1" "prefix=$(out)" ];
+
+  preFixup = ''
+    # pull in 'objdump' into PATH to make annotations work
+    wrapProgram $out/bin/perf \
+      --prefix PATH : "${binutils-unwrapped}/bin"
+  '';
+
+  meta = {
+    homepage = "https://perf.wiki.kernel.org/";
+    description = "Linux tools to profile with performance counters";
+    maintainers = with lib.maintainers; [viric];
+    platforms = with lib.platforms; linux;
+    broken = kernel.kernelOlder "5";
+  };
+}