autoPatchelfHook: Only check PT_INTERP on execs

If the ELF file is not an executable, we do not get a PT_INTERP section,
because after all, it's a *shared* library.

So instead of checking for PT_INTERP (to avoid statically linked
executables) for all ELF files, we add another check to see if it's an
executable and *only* skip it when it is and there's no PT_INTERP.

Signed-off-by: aszlig <aszlig@nix.build>

pkgs/build-support/setup-hooks/auto-patchelf.sh

@@ -155,8 +155,10 @@ autoPatchelf() {
     # outside of this function.
     while IFS= read -r -d $'\0' file; do
       isELF "$file" || continue
-      # dynamically linked?
+      if isExecutable "$file"; then
+          # Skip if the executable is statically linked.
           readelf -l "$file" | grep -q "^ *INTERP\\>" || continue
+      fi
       autoPatchelfFile "$file"
     done < <(find "$prefix" -type f -print0)
 }