[CMake] Detecting linux distro?

[Andreas Schneider]

Kedzierski, Artur CIV NSWC Corona, PA53 wrote:
>  
> 	I had to do that too. I ended up going by distribution-specific
> file in /etc. For example, 
> Red Hat:   /etc/redhat-release
> Slackware: /etc/slackware-version
> Slamd64:   /etc/slamd64-version
> 	To determine whether it is 64-bit vs 32-bit Red Hat, I use 
> 'uname -m'.
> 

uname -m is a bad idea. If you compile a 32bit application in a chroot system
on a x86_64 system. Then uname -m will return x86_64 and not i386.

You should use:

if (CMAKE_SIZEOF_VOID_P MATCHES "8")
endif (CMAKE_SIZEOF_VOID_P MATCHES "8")


	-- andreas

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