Re: Library version thru autoconf ?

[Warren Young]

Sébastien Le Roux wrote:
> I wonder if there is a way (a macro ?) to obtain the version of a library.

Maybe, but the Autoconf Way is to test for features, not versions.

Take the simple case, only two supported versions of a library, old and 
new.  You write a single autoconf test that tries to link a program 
containing a routine only available in the new library.  AC_TRY_LINK  If 
the new library differs only in the interface to the same set of 
functions, you'd have to use AC_TRY_COMPILE instead, with an attempt to 
call the newer interface.

You probably need at least two tests, in actual use.  The second one is 
in case the first fails, to check that the old version exists, to 
differentiate that case from the one where neither version is present.