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/interpreters/tcl/tcl-package-hook.sh

@@ -0,0 +1,78 @@
+# This hook ensures that we do the following in post-fixup:
+# * wrap any installed executables with a wrapper that configures TCLLIBPATH
+# * write a setup hook that extends the TCLLIBPATH of any anti-dependencies
+
+tclWrapperArgs=( ${tclWrapperArgs-} )
+
+# Add a directory to TCLLIBPATH, provided that it exists
+_addToTclLibPath() {
+    local tclPkg="$1"
+    if [[ -z "$tclPkg" ]]; then
+        return
+    fi
+
+    if [[ ! -d "$tclPkg" ]]; then
+        >&2 echo "can't add $tclPkg to TCLLIBPATH; that directory doesn't exist"
+        exit 1
+    fi
+
+    if [[ "$tclPkg" == *" "* ]]; then
+        tclPkg="{$tclPkg}"
+    fi
+
+    if [[ -z "${TCLLIBPATH-}" ]]; then
+        export TCLLIBPATH="$tclPkg"
+    else
+        if [[ "$TCLLIBPATH" != *"$tclPkg "* && "$TCLLIBPATH" != *"$tclPkg" ]]; then
+            export TCLLIBPATH="${TCLLIBPATH} $tclPkg"
+        fi
+    fi
+}
+
+# Locate any directory containing an installed pkgIndex file
+findInstalledTclPkgs() {
+    local -r newLibDir="${!outputLib}/lib"
+    if [[ ! -d "$newLibDir" ]]; then
+        >&2 echo "Assuming no loadable tcl packages installed ($newLibDir does not exist)"
+        return
+    fi
+    echo "$(find "$newLibDir" -name pkgIndex.tcl -exec dirname {} \;)"
+}
+
+# Wrap any freshly-installed binaries and set up their TCLLIBPATH
+wrapTclBins() {
+    if [[ -z "${TCLLIBPATH-}" ]]; then
+        echo "skipping automatic Tcl binary wrapping (nothing to do)"
+        return
+    fi
+
+    local -r tclBinsDir="${!outputBin}/bin"
+    if [[ ! -d "$tclBinsDir" ]]; then
+        echo "No outputBin found, not using any TCLLIBPATH wrapper"
+        return
+    fi
+
+    tclWrapperArgs+=(--prefix TCLLIBPATH ' ' "$TCLLIBPATH")
+
+    find "$tclBinsDir" -type f -executable -print |
+        while read -r someBin; do
+            echo "Adding TCLLIBPATH wrapper for $someBin"
+            wrapProgram "$someBin" "${tclWrapperArgs[@]}"
+        done
+}
+
+# Generate hook to adjust TCLLIBPATH in anti-dependencies
+writeTclLibPathHook() {
+    local -r hookPath="${!outputLib}/nix-support/setup-hook"
+    mkdir -p "$(dirname "$hookPath")"
+
+    typeset -f _addToTclLibPath >> "$hookPath"
+    local -r tclPkgs=$(findInstalledTclPkgs)
+    while IFS= read -r tclPkg; do
+        echo "_addToTclLibPath \"$tclPkg\"" >> "$hookPath"
+        _addToTclLibPath "$tclPkg" true
+    done <<< "$tclPkgs"
+}
+
+postFixupHooks+=(writeTclLibPathHook)
+postFixupHooks+=(wrapTclBins)