Can't find libGLEW.so on a 64 bits linux OS

[elLolo]

Hi!

CMake can't find the file libGLEW.so for ParticlesOpenCL in /usr/lib because it is located in /usr/lib64 on 64 bits OS (like my Fedora 13 for example). If I set CMAK_GLEW_LIBRARY to /usr/lib64/libGLEW.so, everything work. BTW, is CMAK_GLEW_LIBRARY a typo?

I don't know how to properly detect 64 bits on linux with CMake, maybe with CMAKE_SIZEOF_VOID_P?

[Dragonlord]

There is no normed way under Linux to detect 64-bit or 32-bit systems. Your code should compile on both systems without having to detect the bit-iness. Otherwise you've got a bigger problem going.

EDIT: I should be a bit more accurate. There is no direct way to test it. While compiling __WORDSIZE is set to 32 or 64 by the compiler though.

[elLolo]

There is no normed way under Linux to detect 64-bit or 32-bit systems. Your code should compile on both systems without having to detect the bit-iness. Otherwise you've got a bigger problem going.

EDIT: I should be a bit more accurate. There is no direct way to test it. While compiling __WORDSIZE is set to 32 or 64 by the compiler though.

Actually, the problem is in a Bullet Demo, not with my code

[Erwin Coumans]

We used to avoid those errors like this in previous Bullet version, we might have to consider to put this back again:

if (CMAKE_SIZEOF_VOID_P MATCHES "8")
SUBDIRS( BulletSoftBody BulletCollision BulletDynamics LinearMath )
else (CMAKE_SIZEOF_VOID_P MATCHES "8")
SUBDIRS( BulletMultiThreaded BulletSoftBody BulletCollision BulletDynamics LinearMath )
endif (CMAKE_SIZEOF_VOID_P MATCHES "8")

Let's continue the discussion and fixes in this issue: http://code.google.com/p/bullet/issues/detail?id=421
Thanks,
Erwin