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- ## -*- Autoconf -*-
- # Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
- #
- # This file is free software; the Free Software Foundation
- # gives unlimited permission to copy and/or distribute it,
- # with or without modifications, as long as this notice is preserved.
-
- # AM_PROG_MKDIR_P
- # ---------------
- # Check whether `mkdir -p' is supported, fallback to mkinstalldirs otherwise.
- #
- # Automake 1.8 used `mkdir -m 0755 -p --' to ensure that directories
- # created by `make install' are always world readable, even if the
- # installer happens to have an overly restrictive umask (e.g. 077).
- # This was a mistake. There are at least two reasons why we must not
- # use `-m 0755':
- # - it causes special bits like SGID to be ignored,
- # - it may be too restrictive (some setups expect 775 directories).
- #
- # Do not use -m 0755 and let people choose whatever they expect by
- # setting umask.
- #
- # We cannot accept any implementation of `mkdir' that recognizes `-p'.
- # Some implementations (such as Solaris 8's) are not thread-safe: if a
- # parallel make tries to run `mkdir -p a/b' and `mkdir -p a/c'
- # concurrently, both version can detect that a/ is missing, but only
- # one can create it and the other will error out. Consequently we
- # restrict ourselves to GNU make (using the --version option ensures
- # this.)
- AC_DEFUN([AM_PROG_MKDIR_P],
- [if mkdir -p --version . >/dev/null 2>&1 && test ! -d ./--version; then
- # We used to keeping the `.' as first argument, in order to
- # allow $(mkdir_p) to be used without argument. As in
- # $(mkdir_p) $(somedir)
- # where $(somedir) is conditionally defined. However this is wrong
- # for two reasons:
- # 1. if the package is installed by a user who cannot write `.'
- # make install will fail,
- # 2. the above comment should most certainly read
- # $(mkdir_p) $(DESTDIR)$(somedir)
- # so it does not work when $(somedir) is undefined and
- # $(DESTDIR) is not.
- # To support the latter case, we have to write
- # test -z "$(somedir)" || $(mkdir_p) $(DESTDIR)$(somedir),
- # so the `.' trick is pointless.
- mkdir_p='mkdir -p --'
- else
- # On NextStep and OpenStep, the `mkdir' command does not
- # recognize any option. It will interpret all options as
- # directories to create, and then abort because `.' already
- # exists.
- for d in ./-p ./--version;
- do
- test -d $d && rmdir $d
- done
- # $(mkinstalldirs) is defined by Automake if mkinstalldirs exists.
- if test -f "$ac_aux_dir/mkinstalldirs"; then
- mkdir_p='$(mkinstalldirs)'
- else
- mkdir_p='$(install_sh) -d'
- fi
- fi
- AC_SUBST([mkdir_p])])
-