[mvapich-discuss] MVAPICH2, Lustre 2.4, and /usr/include/sys/quota.h lead to _XOPEN_SOURCE and caddr_t problem

[Adam T. Moody]

  Hello MVAPICH team,
I'm trying to build MVAPICH2 on one of our systems that has Lustre 2.4 
installed, but I'm hitting the following error during the build:

make[3]: Entering directory 
`/usr/global/tools/mpi/sideinstalls/chaos_5_x86_64_ib/mvapich2-2.0b-gnu-cuda/mvapich2-2.0b/src/mpi/romio'
CC adio/ad_lustre/ad_lustre_rwcontig.lo
In file included from /usr/include/linux/lustre_user.h:46,
from /usr/include/lustre/lustre_user.h:54,
from adio/ad_lustre/ad_lustre.h:30,
from adio/ad_lustre/ad_lustre_rwcontig.c:14:
/usr/include/sys/quota.h:221: error: expected declaration specifiers or 
'...' before 'caddr_t'

 From what I've read 
(http://gcc.gnu.org/ml/gcc-patches/2000-09/msg00651.html), defining 
_XOPEN_SOURCE hides the definition of caddr_t, which is a BSD feature.

It seems there are two spots where _XOPEN_SOURCE is defined, both in ROMIO.

 >>: grep -R -n XOPEN_SOURCE src/mpi/*
src/mpi/romio/adio/ad_xfs/ad_xfs.h:11:#define _XOPEN_SOURCE 500
src/mpi/romio/adio/ad_lustre/ad_lustre_rwcontig.c:11:#define 
_XOPEN_SOURCE 600

If I comment the line in ad_lustre_rwcontig.c, the build works.

Are these definitions necessary, or can they be removed?
-Adam