illegal instruction - create compile variants ?

[David Timms]

Hi, a user of rakarrack was getting startup exception SIGILL [1].

Seems the config/make/compile process for this app checks CPU capability 
of the machine it is being compiled on, and applies optimisations that 
are available on that processor.

The user has a much older processor.

Upstream suggest [2] that distros could add a script to detect runtime 
CPU, and call the appropriately compiled executable.

To do that in rpm, I think I would need to call configure a second time.
Also, the new compile would overwrite the first compile, so it doesn't 
seem that easy.

Any suggestions on a way forward ?


[1] https://bugzilla.redhat.com/show_bug.cgi?id=700183

[2] http://rakarrack.sourceforge.net/FAQ.html
  [Why when I run rakarrack I receive a "Illegal Instruction" message?]