| 1 | ## -*- Autoconf -*-
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| 2 | # Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
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| 3 | #
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| 4 | # This file is free software; the Free Software Foundation
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| 5 | # gives unlimited permission to copy and/or distribute it,
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| 6 | # with or without modifications, as long as this notice is preserved.
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| 7 |
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| 8 | # AM_PROG_MKDIR_P
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| 9 | # ---------------
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| 10 | # Check whether `mkdir -p' is supported, fallback to mkinstalldirs otherwise.
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| 11 | #
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| 12 | # Automake 1.8 used `mkdir -m 0755 -p --' to ensure that directories
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| 13 | # created by `make install' are always world readable, even if the
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| 14 | # installer happens to have an overly restrictive umask (e.g. 077).
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| 15 | # This was a mistake. There are at least two reasons why we must not
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| 16 | # use `-m 0755':
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| 17 | # - it causes special bits like SGID to be ignored,
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| 18 | # - it may be too restrictive (some setups expect 775 directories).
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| 19 | #
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| 20 | # Do not use -m 0755 and let people choose whatever they expect by
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| 21 | # setting umask.
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| 22 | #
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| 23 | # We cannot accept any implementation of `mkdir' that recognizes `-p'.
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| 24 | # Some implementations (such as Solaris 8's) are not thread-safe: if a
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| 25 | # parallel make tries to run `mkdir -p a/b' and `mkdir -p a/c'
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| 26 | # concurrently, both version can detect that a/ is missing, but only
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| 27 | # one can create it and the other will error out. Consequently we
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| 28 | # restrict ourselves to GNU make (using the --version option ensures
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| 29 | # this.)
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| 30 | AC_DEFUN([AM_PROG_MKDIR_P],
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| 31 | [if mkdir -p --version . >/dev/null 2>&1 && test ! -d ./--version; then
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| 32 | # We used to keeping the `.' as first argument, in order to
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| 33 | # allow $(mkdir_p) to be used without argument. As in
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| 34 | # $(mkdir_p) $(somedir)
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| 35 | # where $(somedir) is conditionally defined. However this is wrong
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| 36 | # for two reasons:
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| 37 | # 1. if the package is installed by a user who cannot write `.'
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| 38 | # make install will fail,
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| 39 | # 2. the above comment should most certainly read
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| 40 | # $(mkdir_p) $(DESTDIR)$(somedir)
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| 41 | # so it does not work when $(somedir) is undefined and
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| 42 | # $(DESTDIR) is not.
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| 43 | # To support the latter case, we have to write
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| 44 | # test -z "$(somedir)" || $(mkdir_p) $(DESTDIR)$(somedir),
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| 45 | # so the `.' trick is pointless.
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| 46 | mkdir_p='mkdir -p --'
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| 47 | else
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| 48 | # On NextStep and OpenStep, the `mkdir' command does not
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| 49 | # recognize any option. It will interpret all options as
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| 50 | # directories to create, and then abort because `.' already
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| 51 | # exists.
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| 52 | for d in ./-p ./--version;
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| 53 | do
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| 54 | test -d $d && rmdir $d
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| 55 | done
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| 56 | # $(mkinstalldirs) is defined by Automake if mkinstalldirs exists.
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| 57 | if test -f "$ac_aux_dir/mkinstalldirs"; then
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| 58 | mkdir_p='$(mkinstalldirs)'
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| 59 | else
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| 60 | mkdir_p='$(install_sh) -d'
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| 61 | fi
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| 62 | fi
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| 63 | AC_SUBST([mkdir_p])])
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