Peter Rosin <p...@lysator.liu.se> writes:
> On 2014-02-27 01:20, Russ Allbery wrote:
>> Wouldn't you name the variable FOO_FEATURE? In other words, I think
>> the example in the Autoconf manual is not the best, but the
>> functionality you need is there. I would rewrite the example as:
>>
>> AC_CACHE_CHECK([for m4 that supports indir], [ac_cv_path_M4_indir],
>> [AC_PATH_PROGS_FEATURE_CHECK([M4_indir], [m4 gm4],
>> ...
>> AC_SUBST([M4], [$ac_cv_path_M4_indir])
> That doesn't work, because then you can't shortcut the test with the
> natural M4=/some/gnu/place/m4, you'd be forced to write M4_indir=...
> instead. This is even worse than saving the ac_cv_path_FOO variable
> during the AC_PATH_PROGS_FEATURE_CHECK macro, since it would be visible
> to the end user.
Good point. However, couldn't you just put:
: ${ac_cv_path_M4_indir:=$M4}
before the above code?
--
Russ Allbery (ea...@eyrie.org) <http://www.eyrie.org/~eagle/>
