The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/config/always-sed.m4

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    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 ])

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