setiathome-enhanced 5.27 : configure step unreliable?

[Rene Ladan]

Hi,

I've updated the FreeBSD port of setiathome-enhanced to 5.27 and it also
has been committed to the ports tree.  However there seems to be a problem
with the generated configure, it does not properly detect xmmintrin.h on
some systems even when present (it is located in /usr/include).  The
strange thing is that the file _does_ get detected on my box:

FreeBSD 7.0-CURRENT i386, 2007-08-20

The resulting application even produces valid results :) :
http://setiathome.berkeley.edu/results.php?userid=211311
(look for computer 2960826, the other one is a Windows XP box at work)

Some failure reports from users are at:

http://head.miwibox.org/tb/index.php?action=describe_port&id=1806
http://amd64.miwibox.org/tb/index.php?action=describe_port%26id=1245
and
http://home.tiscali.nl/rladan/freebsd/sah/config_make.log.gz
  (uploaded, sent per private email)

When originally designing the port, I've chosen to slightly modify the build
infrastructure to:
* match the FreeBSD BOINC port,
* remove some unnecessary/unuseable stuff (server, graphics)
* take some FreeBSD-only shortcuts,
* remove some polluting -mCPU_SPECIFIC compiler options, they are set in the
  port Makefile instead to keep the source more CPU-independent.
I've not changed anything else.  The recipe to create the FreeBSD source
tarball from the setiathome_enhanced-client-cvs-2007-08-08.tar.gz tarball
is at:

http://home.tiscali.nl/rladan/freebsd/sah/seti-recipe.sh
http://home.tiscali.nl/rladan/freebsd/sah/patches.diff
 (referenced by the .sh file)

The recipe recreates the configure and Makefile.in files, I've used the
following tools for this as installed by the devel/autotools port:
* aclocal 1.10
* autoheader 2.61
* autoconf 2.61
* automake 1.10

Can someone shed a light on it?  I don't see anything obviously wrong myself.

Regards,
Rene
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