Re: getting the file extension of a shared object

[David Fang]

> when a configure frile is created, shretx_cmds is defined to the file 
> extension of a shared object, wrt the platform (.dll for windows, .so for 
> unix, ...).
>
> What I can do is AC_DEFINE a macro using $shrext_cmds and using that macro in 
> my code.
>
> Is there a better way to achieve that ?

AC_DEFINE works well for anything that preprocesses config.h.
You could also store the result like so:

SHREXT=$shrext_cmds
AC_SUBST(SHREXT)

to perform configure-substitution on @SHREXT@ on AC_OUTPUT files.

As as a side question: are you trying to do something that libtool/libltdl 
could handle?  libltdl's lt_dlopenext() loads modules given the base name 
without the file extension, which takes some pain out of portability.

Fang


David Fang
http://www.csl.cornell.edu/~fang/
http://www.achronix.com/