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/applications/science/logic/elan/0001-dynamically-patchelf-binaries.patch

@@ -0,0 +1,35 @@
+diff --git a/src/elan-dist/src/component/package.rs b/src/elan-dist/src/component/package.rs
+index c51e76d..ae8159e 100644
+--- a/src/elan-dist/src/component/package.rs
++++ b/src/elan-dist/src/component/package.rs
+@@ -56,6 +56,30 @@ fn unpack_without_first_dir<R: Read>(archive: &mut tar::Archive<R>, path: &Path)
+         entry
+             .unpack(&full_path)
+             .chain_err(|| ErrorKind::ExtractingPackage)?;
++        nix_patch_if_needed(&full_path)?;
++    }
++
++    Ok(())
++}
++
++fn nix_patch_if_needed(dest_path: &Path) -> Result<()> {
++    let is_bin = matches!(dest_path.parent(), Some(p) if p.ends_with("bin"));
++    if is_bin {
++        let _ = ::std::process::Command::new("@patchelf@/bin/patchelf")
++            .arg("--set-interpreter")
++            .arg("@dynamicLinker@")
++            .arg(dest_path)
++            .output();
++    }
++
++    if dest_path.file_name() == Some(::std::ffi::OsStr::new("leanc")) {
++        use std::os::unix::fs::PermissionsExt;
++        let new_path = dest_path.with_extension("orig");
++        ::std::fs::rename(dest_path, &new_path)?;
++        ::std::fs::write(dest_path, format!(r#"#! @shell@
++LEAN_CC="${{LEAN_CC:-@cc@}}" exec -a "$0" {} "$@" -L {}/lib  # use bundled libraries, but not bundled compiler that doesn't know about NIX_LDFLAGS
++"#, new_path.to_str().unwrap(), dest_path.parent().unwrap().parent().unwrap().to_str().unwrap()))?;
++        ::std::fs::set_permissions(dest_path, ::std::fs::Permissions::from_mode(0o755))?;
+     }
+ 
+     Ok(())

pkgs/applications/science/logic/elan/default.nix

@@ -0,0 +1,65 @@
+{ stdenv, lib, runCommand, patchelf, makeWrapper, pkg-config, curl, runtimeShell
+, openssl, zlib, fetchFromGitHub, rustPlatform, libiconv }:
+
+rustPlatform.buildRustPackage rec {
+  pname = "elan";
+  version = "1.4.1";
+
+  src = fetchFromGitHub {
+    owner = "leanprover";
+    repo = "elan";
+    rev = "v${version}";
+    sha256 = "sha256-jHECNSXSATLuNHNSVwi7mBTI8l6+cLPDISc5T/4yHDg=";
+  };
+
+  cargoSha256 = "sha256-/XwlTmUboDbB6RTanhKyO6o2GBUhxpH/NQjeNsKpse0=";
+
+  nativeBuildInputs = [ pkg-config makeWrapper ];
+
+  OPENSSL_NO_VENDOR = 1;
+  buildInputs = [ curl zlib openssl ]
+    ++ lib.optional stdenv.isDarwin libiconv;
+
+  buildFeatures = [ "no-self-update" ];
+
+  patches = lib.optionals stdenv.isLinux [
+    # Run patchelf on the downloaded binaries.
+    # This is necessary because Lean 4 is now dynamically linked.
+    (runCommand "0001-dynamically-patchelf-binaries.patch" {
+        CC = stdenv.cc;
+        cc = "${stdenv.cc}/bin/cc";
+        patchelf = patchelf;
+        shell = runtimeShell;
+      } ''
+     export dynamicLinker=$(cat $CC/nix-support/dynamic-linker)
+     substitute ${./0001-dynamically-patchelf-binaries.patch} $out \
+       --subst-var patchelf \
+       --subst-var dynamicLinker \
+       --subst-var cc \
+       --subst-var shell
+    '')
+  ];
+
+  postInstall = ''
+    pushd $out/bin
+    mv elan-init elan
+    for link in lean leanpkg leanchecker leanc leanmake lake; do
+      ln -s elan $link
+    done
+    popd
+
+    # tries to create .elan
+    export HOME=$(mktemp -d)
+    mkdir -p "$out/share/"{bash-completion/completions,fish/vendor_completions.d,zsh/site-functions}
+    $out/bin/elan completions bash > "$out/share/bash-completion/completions/elan"
+    $out/bin/elan completions fish > "$out/share/fish/vendor_completions.d/elan.fish"
+    $out/bin/elan completions zsh >  "$out/share/zsh/site-functions/_elan"
+  '';
+
+  meta = with lib; {
+    description = "Small tool to manage your installations of the Lean theorem prover";
+    homepage = "https://github.com/leanprover/elan";
+    license = with licenses; [ asl20 /* or */ mit ];
+    maintainers = with maintainers; [ gebner ];
+  };
+}