config/always-sed.m4

   1 dnl #
   2 dnl # Set the flags used for sed in-place edits.
   3 dnl #
   4 AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_SED], [
   5         AC_REQUIRE([AC_PROG_SED])dnl
   6         AC_CACHE_CHECK([for sed --in-place], [ac_cv_inplace], [
   7                 tmpfile=$(mktemp conftest.XXXXXX)
   8                 echo foo >$tmpfile
   9                 AS_IF([$SED --in-place 's#foo#bar#' $tmpfile 2>/dev/null],
  10                       [ac_cv_inplace="--in-place"],
  11                       [$SED -i '' 's#foo#bar#' $tmpfile 2>/dev/null],
  12                       [ac_cv_inplace="-i ''"],
  13                       [AC_MSG_ERROR([$SED does not support in-place])])
  14         ])
  15         AC_SUBST([ac_inplace], [$ac_cv_inplace])
  16 ])