Microstate acctg. in large file compilation

Question

I am trying to enable microstate accounting by using the following code
#include <procfs.h>
     sprintf(procname,"/proc/%d/ctl",(int)getpid());
     ctlfd = open(procname,O_WRONLY);
     ctl[0]=PCSET;
     ctl[1]=PR_MSACCT;
     write(ctlfd,ctl,2*sizeof(long));My application needs to be compiled with the large file compilation environment flags. But the compiler (SunStudio 8 on Solaris 8) gives me an error:
"Cannot use procfs in the large file compilation environment".
Is there any way to get around this problem?
Or is there any other way to enable microstate accounting that would work with the large file compilation?

Answer 1

Your question is not about C++, but about Solaris process accounting.
Inspection of the procfs header shows that it requires a consistent ILP32 (32-bit int, long, and pointer) or LP64 (64-bit long and pointer) model. It won't work with the ILP32 model modified with 64-bit file access. The error message is coming from the procfs header.
If you can build your application as a 64-bit program, using -xarch=v9, it should compile. But your application needs to be 64-bit clean, with no hidden ILP32 assumptions.
Lint provides options for identifying C code that is not 64-bit clean. The C++ compiler has an -xport64 option for the same purpose. Refer to the C and C++ Users Guides for details.