On /tmp (ext3)

open("CkCallback.decl.h", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 3
open("CkCallback.def.h", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 4
writev(3, [{NULL, 0}, {"#ifndef _DECL_CkCallback_H_\n#def"..., 20989}], 2) = 20989
writev(4, [{NULL, 0}, {"\n\n\n/* ---------------- method cl"..., 30832}], 2) = 30832

On /global/u1 GPFS

open("CkCallback.decl.h", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 3
open("CkCallback.def.h", O_WRONLY|O_CREAT|O_TRUNC, 0666) = 4
writev(3, [{NULL, 0}, {"#ifndef _DECL_CkCallback_H_\n#def"..., 20989}], 2) = -1 EINVAL (Invalid argument)
writev(4, [{NULL, 0}, {"\n\n\n/* ---------------- method cl"..., 30832}], 2) = -1 EINVAL (Invalid argument)