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#***************************************************************************
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# $Id$
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#
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# Copyright (C) 2008 by Daniel Stenberg et al
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#
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# Permission to use, copy, modify, and distribute this software and its
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# documentation for any purpose and without fee is hereby granted, provided
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# that the above copyright notice appear in all copies and that both that
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# copyright notice and this permission notice appear in supporting
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# documentation, and that the name of M.I.T. not be used in advertising or
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# publicity pertaining to distribution of the software without specific,
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# written prior permission. M.I.T. makes no representations about the
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# suitability of this software for any purpose. It is provided "as is"
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# without express or implied warranty.
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#
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#***************************************************************************
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# File version for 'aclocal' use. Keep it a single number.
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# serial 2
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dnl CARES_CHECK_PATH_SEPARATOR
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dnl -------------------------------------------------
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dnl Check and compute the path separator for us. This
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dnl path separator is the symbol used to diferentiate
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dnl or separate paths inside the PATH environment var.
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AC_DEFUN([CARES_CHECK_PATH_SEPARATOR], [
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if test -z "$cares_cv_PATH_SEPARATOR"; then
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if test -z "$PATH"; then
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AC_MSG_ERROR([PATH not set. Cannot continue without PATH being set.])
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fi
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dnl Directory count in PATH when using a colon separator.
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tst_dirs_col=0
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tst_save_IFS=$IFS; IFS=':'
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for tst_dir in $PATH; do
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IFS=$tst_save_IFS
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test -d "$tst_dir" && tst_dirs_col=`expr $tst_dirs_col + 1`
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done
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IFS=$tst_save_IFS
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dnl Directory count in PATH when using a semicolon separator.
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tst_dirs_sem=0
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tst_save_IFS=$IFS; IFS=';'
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for tst_dir in $PATH; do
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IFS=$tst_save_IFS
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test -d "$tst_dir" && tst_dirs_sem=`expr $tst_dirs_sem + 1`
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done
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IFS=$tst_save_IFS
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if test $tst_dirs_sem -eq $tst_dirs_col; then
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dnl When both counting methods give the same result we do not want to
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dnl chose one over the other, and consider auto-detection not possible.
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if test -z "$PATH_SEPARATOR"; then
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dnl Stop dead until user provides PATH_SEPARATOR definition.
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AC_MSG_ERROR([PATH_SEPARATOR not set. Cannot continue without it.])
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fi
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else
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dnl Separator with the greater directory count is the auto-detected one.
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if test $tst_dirs_sem -gt $tst_dirs_col; then
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tst_auto_separator=';'
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else
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tst_auto_separator=':'
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fi
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if test -z "$PATH_SEPARATOR"; then
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dnl Simply use the auto-detected one when not already set.
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PATH_SEPARATOR="$tst_auto_separator"
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fi
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fi
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cares_cv_PATH_SEPARATOR="$PATH_SEPARATOR"
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fi
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AC_SUBST([PATH_SEPARATOR])
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AC_SUBST([PATH])
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])
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