On Sat, Dec 08, 2012 at 06:32:42PM +0000, Stephen Paul Weber wrote:
> I am working on cleaning up my GHC cross-compiler for QNX (Blackerry
> 10) and encountered the following from ./configure
> --target=i486-pc-nto-qnx8.0.0 --build=i686-linux-gnu
> --host=i686-linux-gnu :
> 
> checking sys/eventfd.h usability... no
> checking sys/eventfd.h presence... yes
> configure: WARNING: sys/eventfd.h: present but cannot be compiled
> configure: WARNING: sys/eventfd.h:     check for missing prerequisite headers?
> configure: WARNING: sys/eventfd.h: see the Autoconf documentation
> configure: WARNING: sys/eventfd.h:     section "Present But Cannot Be 
> Compiled"
> configure: WARNING: sys/eventfd.h: proceeding with the compiler's result
> configure: WARNING:     ## ----------------------------------------------- ##
> configure: WARNING:     ## Report this to glasgow-haskell-b...@haskell.org ##
> configure: WARNING:     ## ----------------------------------------------- ##
> checking for sys/eventfd.h... no
> checking for eventfd... no
> 
> What does this mean?  Is it a problem?

There should be more information about what failed in config.log.
The compilation error message should give some more clues about what's
going on.


Thanks
Ian


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