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Autoconf Macro: ac_very_nice
</title>
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<a href="http://autoconf-archive.cryp.to/ac_very_nice.m4">Download M4
Source</a>
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<hr>
<h1>
ac_very_nice
</h1>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>AC_VERY_NICE</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
A macro to check the options of nice, in order to have a VERY_NICE variable
which runs a program at the lowest priority VERY_NICE is undefined if we
don't find the proper options, so you can safely use:
</p>
<pre>
@VERY_NICE@ mycommand
</pre>
<p>
in a shell script.
</p>
<p>
The VERY_NICE variable includes the placeholder NICE_VALUE that you have to
instantiate at run-time. If you give a argument to AC_VERY_NICE, it will be
used as an argument of nice for testing and included in VERY_NICE instead
of the above placeholder.
</p>
</div>
<h2>
Author
</h2>
<p class="indent">
Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2000-07-19
</p>
<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
AC_DEFUN([AC_VERY_NICE],[
if test "x$1" != "x"; then
NICE_VALUE=$1
else
NICE_VALUE=20
fi
AC_CHECK_PROGS(TEST_NICE, date)
AC_CHECK_PROGS(NICE, nice, )
AC_MSG_CHECKING(syntax of nice)
if test "x$NICE" != "x"; then
if ( $NICE -n $NICE_VALUE $TEST_NICE > /dev/null 2>&1 ) ; then
VERY_NICE="$NICE -n $NICE_VALUE"
else
if ( $NICE -$NICE_VALUE $TEST_NICE > /dev/null 2>&1 ) ; then
VERY_NICE="$NICE -$NICE_VALUE"
fi
fi
fi
if test "x$1" = "x"; then
VERY_NICE=`echo $VERY_NICE | sed "s/$NICE_VALUE/NICE_VALUE/"`
fi
AC_MSG_RESULT($VERY_NICE)
AC_SUBST(VERY_NICE)
])
</pre>
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