Compiling with 32-bit libraries on a 64-bit HP PA-RISC

[mark_mattes]

I've been tasked with getting software off an usupported 32-bit HP machine. I'm trying the quick and dirty approach of just using the Oracle 32-bit libraries we have on the 32-bit machine and moving them to the 64-bit machine and compiling for a pa-risc 1.1. Unix engineering loaded hp-gcc 4.4.0 on the machine and I've messed a little with a simple hello.cxx file.
If I compile with -march=1.1 I still get an ELF 64 if I try -mportable-runtime I get error: '__size_t' has not been declared. My prgram is:

#include <stdio.h>
 
int
main(void)
{
  printf("Hello world.\n");
 
  return(0);
}
 

and I compile with:
/opt/hp-gcc64/bin/g++ -mportable-runtime -c tstHello.cxx -o tstHello32gcc.o

I don't really have to stick with gcc but I don't have an HP compiler to do a proof of concept with.

[Banfa]

Have you tried using the -m32 switch?

I have to say when I did something similar on Linux I gave up on cross compiling and installed a 32bit environment I could chroot to for the 32 bit compilations.

[mark_mattes]

@Banfa
-m32 is for Intel processors, I'm on an HP PA-RISC. The -mpa-risc-1-1 or -march=1.1 are the RISC versions of -m32. Duh, so I can load a 32-bit version of gcc on my 64-bit HP? I bet they never loaded the 32-bit version, hence the switch above does nothing, double doh. Do you know if you can download the source and compile in a local dir? I'm pretty sure I'm not going to get anyone from Unix Engineering to create one for me today.