[mvapich-discuss] Conflicting names for global variables

[Adam T. Moody]

Hello MVAPICH Team,
While working to port one application from MVAPICH to MVAPICH2, we 
immediately ran into a problem regarding common symbol names between the 
library and the application.  In particular, the "hostname" variable 
defined in ch3_shmem_coll.c conflicts with an application variable by 
the same name.  The application linked ok, but then it seg faults at 
runtime.

Since these variables are not meant to be exposed to applications, would 
you please modify the source to hide them?

If those variables are only used internally within the same .c file, you 
can declare them as "static" so that they are not visible externally.

For global variables that are needed outside of the .c file, you can add 
a prefix like "mv2_" to reduce the chance that the name will conflict 
with application variable names.

Thanks,
-Adam