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Editing: aclocal.m4

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the upcoming POSIX standard: <http://austingroupbugs.net/view.php?id=542>

Please tell bug-automake@gnu.org about your system, including the value
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Aborting the configuration process, to ensure you take notice of the issue.

You can download and install GNU coreutils to get an 'rm' implementation
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If you want to complete the configuration process using your problematic
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# Copyright (C) 2009-2018 Free Software Foundation, Inc.
#
# This file is free software; the Free Software Foundation
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# Copyright (C) 2006-2018 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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# Check how to create a tarball.                            -*- Autoconf -*-

# Copyright (C) 2004-2018 Free Software Foundation, Inc.
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# This file is free software; the Free Software Foundation
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AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
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AC_SUBST([am__tar])
AC_SUBST([am__untar])
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m4_include([m4/ax_pkg_config.m4])
m4_include([m4/libtool.m4])
m4_include([m4/ltoptions.m4])
m4_include([m4/ltsugar.m4])
m4_include([m4/ltversion.m4])
m4_include([m4/lt~obsolete.m4])

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