chroot_version_hooks.d/159_glibc_headers

# Copyright 2018 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Manually prune headers that glibc no longer provides.  This is a bit hacky
# since our manually deployed glibc tarball doesn't track contents anywhere.
#
# This only applies to board sysroots where we manually inject headers.  The
# SDK upgrades glibc like a proper package and thus keeps track for us.

update() {
  local root=$1 board=$2

  # We know these header files have been punted, so forcibly delete them.
  sudo rm -f \
    "${root}/usr/include/xlocale.h" \
    "${root}/usr/include/sys/ultrasound.h"

  # The RPC headers have moved from glibc to a dedicated package.  If that
  # package has been installed and replaced the headers, we don't want to
  # delete them.  But if they're still orphaned, prune them.
  #
  # We send the output of find to /dev/null in case the rpc dirs have already
  # been cleaned up (due to a fresh glibc-2.27-only install).
  local files=() file
  while read file; do
    # Newer glibc has one file it still wants to keep, so filter it out.
    if [[ "${file}" == */rpc/netdb.h ]]; then
      continue
    fi

    files+=( "${file}" )
  done < <(find "${root}"/usr/include/rpc* -type f \
             -exec qfile-${board} -Ro {} + 2>/dev/null)
  sudo rm -f "${files[@]}"

  # If the dirs are empty, trim them.  But don't force it in case other packages
  # have installed real files in there.
  sudo rmdir "${root}"/usr/include/rpc* 2>/dev/null || :
}

for board_root in /build/*; do
  board=${board_root##*/}
  update "${board_root}" "${board}" &
done

wait