bug#30616: automake-1.16: aclocal is unable to process AM_PATH_PYTHON with variable as value

[Thomas Deutschmann]

Hi,

re-sending to bug-automake (first mail was accidentally sent
to the normal mailing list).

With automake-1.16, code like

> AM_PATH_PYTHON([$PYTHON_VERSION])

or

> AM_PATH_PYTHON([$PYTHON_MIN_VERSION])

as found in

https://gitlab.com/cryptsetup/cryptsetup/blob/master/configure.ac#L506
https://github.com/ImageMagick/PythonMagick/blob/master/configure.ac#L42

doesn't work anymore:

> ***** aclocal *****
> ***** PWD: /var/tmp/portage/sys-fs/cryptsetup-2.0.1/work/cryptsetup-2.0.1
> ***** aclocal -I m4
> 
> /usr/bin/m4:configure.ac:506: bad expression in eval (bad input): ($+1) != (2)
> /usr/bin/m4:configure.ac:506: bad expression in eval (bad input): 
> (0r36:PYTHON_+1) != (0*4)
> autom4te-2.69: /usr/bin/m4 failed with exit status: 1
> aclocal-1.16: error: echo failed with exit status: 1


-- 
Regards,
Thomas Deutschmann / Gentoo Linux Developer
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