[Linrad] 32 or 64 bit

[Leif Asbrink <sm5bsz.com; leif@xxxxxxxxxxxxxxxx>]

Hi All,

Under Linux the Linrad configure script looks for various files
to decide which packages are installed. This works for 32 bit
versions of Linux, but when Linrad is compiled on a 64 bit
distribution the test for things like libXext.so which is done
like below may give a false positive.

LIBEXT=0
AC_CHECK_FILE( /emul/ia32-linux/usr/lib/libXext.so, LIBEXT="1")
AC_CHECK_FILE( /usr/lib/libXext.so, LIBEXT="1")
AC_CHECK_FILE( [libXext.so], LIBEXT="1")
AC_CHECK_FILE( /usr/lib32/libXext.so, LIBEXT="1")
AC_CHECK_FILE( /usr/PCBSD/local/lib/libXext.so, LIBEXT="1")

The second and/or third test would give a false positive if
the 64 bit version is installed but not the 32 bit version
when running on a 64 bit distribution. Less likely, but possibly
there could be a false positive when the 64 bit library is 
installed but not the 32 bit one on a 32 bit system.
As a consequence of a false positive the make command would
try to link with libXext and it would fail if there is no 
32 bit library present.

The next version of Linrad will have an interface to Portaudio
which will allow Jack to interface to other softwares - but it 
would have to be 32 bit portaudio. I desperately need a way
for the configure script to search for the presence of 32 bit 
libraries only. One way could be to to do the test for 
[libXext] and /usr/lib/libXext only on 32 bit distributions.
- but what command would tell if the system is 32 or 64 bit?

Any hints?

73

Leif / SM5BSZ

--~--~---------~--~----~------------~-------~--~----~
You received this message because you are subscribed to the Google Groups "Linrad" group.
To post to this group, send email to linrad@xxxxxxxxxxxxxxxx
To unsubscribe from this group, send email to linrad+unsubscribe@xxxxxxxxxxxxxxxx
For more options, visit this group at http://groups.google.com/group/linrad?hl=en
-~----------~----~----~----~------~----~------~--~---


LINRADDARNIL