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/tools/misc/execline/default.nix

@@ -0,0 +1,68 @@
+{ fetchFromGitHub, skawarePackages }:
+
+with skawarePackages;
+let
+  version = "2.8.3.0";
+
+  # Maintainer of manpages uses following versioning scheme: for every
+  # upstream $version he tags manpages release as ${version}.1, and,
+  # in case of extra fixes to manpages, new tags in form ${version}.2,
+  # ${version}.3 and so on are created.
+  manpages = fetchFromGitHub {
+    owner = "flexibeast";
+    repo = "execline-man-pages";
+    rev = "v${version}.2";
+    sha256 = "0fzv5as81aqgl8llbz8c5bk5n56iyh4g70r54wmj71rh2d1pihk5";
+  };
+
+in buildPackage {
+  inherit version;
+
+  pname = "execline";
+  sha256 = "105dnkw1y6lz0ibqy5b4jarq31y40k7ymhl77i9f10jcb76vwp93";
+
+  description = "A small scripting language, to be used in place of a shell in non-interactive scripts";
+
+  outputs = [ "bin" "man" "lib" "dev" "doc" "out" ];
+
+  # TODO: nsss support
+  configureFlags = [
+    "--libdir=\${lib}/lib"
+    "--dynlibdir=\${lib}/lib"
+    "--bindir=\${bin}/bin"
+    "--includedir=\${dev}/include"
+    "--with-sysdeps=${skalibs.lib}/lib/skalibs/sysdeps"
+    "--with-include=${skalibs.dev}/include"
+    "--with-lib=${skalibs.lib}/lib"
+    "--with-dynlib=${skalibs.lib}/lib"
+  ];
+
+  postInstall = ''
+    # remove all execline executables from build directory
+    rm $(find -type f -mindepth 1 -maxdepth 1 -executable)
+    rm libexecline.*
+
+    mv doc $doc/share/doc/execline/html
+    mv examples $doc/share/doc/execline/examples
+
+    mv $bin/bin/execlineb $bin/bin/.execlineb-wrapped
+
+    # A wrapper around execlineb, which provides all execline
+    # tools on `execlineb`’s PATH.
+    # It is implemented as a C script, because on non-Linux,
+    # nested shebang lines are not supported.
+    # The -lskarnet has to come at the end to support static builds.
+    $CC \
+      -O \
+      -Wall -Wpedantic \
+      -D "EXECLINEB_PATH()=\"$bin/bin/.execlineb-wrapped\"" \
+      -D "EXECLINE_BIN_PATH()=\"$bin/bin\"" \
+      -I "${skalibs.dev}/include" \
+      -L "${skalibs.lib}/lib" \
+      -o "$bin/bin/execlineb" \
+      ${./execlineb-wrapper.c} \
+      -lskarnet
+    mkdir -p $man/share/
+    cp -vr ${manpages}/man* $man/share
+  '';
+}

pkgs/tools/misc/execline/execlineb-wrapper.c

@@ -0,0 +1,51 @@
+/*
+ * A wrapper around execlineb, which provides all execline
+ * tools on execlineb’s PATH.
+ * It is implemented as a C program, because on non-Linux,
+ * nested shebang lines are not supported.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <skalibs/stralloc.h>
+#include <skalibs/djbunix.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/env.h>
+#include <skalibs/exec.h>
+
+#define dienomem() strerr_diefu1sys(111, "stralloc_catb")
+
+// macros from outside
+/* const char* EXECLINEB_PATH; */
+/* const char* EXECLINE_BIN_PATH; */
+
+int main(int argc, char const* argv[], char const *const *envp)
+{
+  PROG = "execlineb-wrapper";
+
+  char const* path = getenv("PATH");
+  stralloc path_modif = STRALLOC_ZERO;
+
+  // modify PATH if unset or EXECLINEB_BIN_PATH is not yet there
+  if ( !path || ! strstr(path, EXECLINE_BIN_PATH())) {
+    // prepend our execline path
+    if ( ! stralloc_cats(&path_modif, "PATH=")
+         || ! stralloc_cats(&path_modif, EXECLINE_BIN_PATH()) ) dienomem();
+    // old path was not empty
+    if ( path && path[0] ) {
+      if ( ! stralloc_catb(&path_modif, ":", 1)
+           || ! stralloc_cats(&path_modif, path) ) dienomem();
+    }
+    // append final \0
+    if ( ! stralloc_0(&path_modif) ) dienomem();
+  }
+
+  // exec into execlineb and append path_modif to the environment
+  xmexec_aem(
+    EXECLINEB_PATH(),
+    argv,
+    envp,
+    path_modif.s, path_modif.len
+  );
+}