[m-users.] Installed mercury not detected by "configure"

[Julien Fischer]

On Tue, 8 Feb 2022, Volker Wysk wrote:

> I've unpacked mercury-srcdist-rotd-2022-02-07 and run "./configure ...". I
> get this in the configure output:
>
> using grade 'asm_fast.gc' as the default grade for applications
> configure: WARNING: Mercury compiler not yet installed -
> ****    cannot use grade 'asm_fast.gc'
> ****    using grade 'hlc.gc.pregen' to compile the compiler
> ****    after installation is complete you may reinstall
> ****    from scratch to have a faster compiler.
> ****    NOTE: before reinstalling from scratch, ensure that the
> ****    source tree is clean by running 'make realclean'. Not doing
> ****    this may result in a broken Mercury installation.
>
> But I *have* a working Mercury installed. Why isn't it found?

It probably was found -- that will be earlier in the configure output.
The problem is most likely that it is not sufficiently up-to-date.

> I can call the compiler with "mmc", it's in the PATH.

In any case, the whole point of the source distribution is that you do
not need a Mercury compiler / an up-to-date Mercury compiler to be
installed on your system in order to build it.

Julien.