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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
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Autoconf Macro: ax_with_python
</title>
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<a href="http://autoconf-archive.cryp.to/ax_with_python.m4">Download M4
Source</a>
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<hr>
<h1>
ax_with_python
</h1>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>AX_WITH_PYTHON([minimum-version], [value-if-not-found], [path])</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
Locates an installed Python binary, placing the result in the precious
variable $PYTHON. Accepts a present $PYTHON, then --with-python, and
failing that searches for python in the given path (which defaults to the
system path). If python is found, $PYTHON is set to the full path of the
binary; if it is not found, $PYTHON is set to VALUE-IF-NOT-FOUND, which
defaults to 'python'.
</p>
<p>
Example:
</p>
<pre>
AX_WITH_PYTHON(2.2, missing)
</pre>
</div>
<h2>
Author
</h2>
<p class="indent">
Dustin Mitchell <dustin@cs.uchicago.edu>
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2005-01-22
</p>
<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
AC_DEFUN([AX_WITH_PYTHON],
[
AC_ARG_VAR([PYTHON])
dnl unless PYTHON was supplied to us (as a precious variable)
if test -z "$PYTHON"
then
AC_MSG_CHECKING(for --with-python)
AC_ARG_WITH(python,
AC_HELP_STRING([--with-python=PYTHON],
[absolute path name of Python executable]),
[ if test "$withval" != "yes"
then
PYTHON="$withval"
AC_MSG_RESULT($withval)
else
AC_MSG_RESULT(no)
fi
],
[ AC_MSG_RESULT(no)
])
fi
dnl if it's still not found, check the paths, or use the fallback
if test -z "$PYTHON"
then
AC_PATH_PROG([PYTHON], python, m4_ifval([$2],[$2],[python]), $3)
fi
dnl check version if required
m4_ifvaln([$1], [
dnl do this only if we didn't fall back
if test "$PYTHON" != "m4_ifval([$2],[$2],[python])"
then
AC_MSG_CHECKING($PYTHON version >= $1)
if test `$PYTHON -c ["import sys; print sys.version[:3] >= \"$1\" and \"OK\" or \"OLD\""]` = "OK"
then
AC_MSG_RESULT(ok)
else
AC_MSG_RESULT(no)
PYTHON="$2"
fi
fi])
])
</pre>
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