how do I substitute the library prefix?

[Sam Steingold]

Hi,

CLISP interface to PARI is configured with the configure.in containing
AC_LIB_LINKFLAGS([pari]).

The build process also requires the Makefile to know where the datadir
of pari is located. To this end, Makefile.in has
--8<---------------cut here---------------start------------->8---
prefix = @LIBPARI_PREFIX@
DATADIR = @datadir@
--8<---------------cut here---------------end--------------->8---
and expects to find $(DATADIR)/pari/pari.desc (normally
/usr/share/pari/pari.desc or /usr/local/share/pari/pari.desc).

This seems to work when PARI is installed in a non-standard location,
but when PARI is in /usr or /usr/local, LIBPARI_PREFIX is _empty_.

How do I insert the location of the PARI's datadir into the Makefile?

Thanks.

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