Hi all,
I'm rebuilding an open source in Solaris 10 ENV using Studio 11 on an ultrasparc server. I want to build it with 32 and 64 bit libs (e.g /source/lib for 32 bit and /source/lib/sparcv9 for 64 bit). Could anyone tell me what are link options or compiler args can do these. (just compile once)
Thanks in advance.
You can't build one library or application for both 32-bit and 64-bit use. At minimum, you must compile and link everything once for each mode.
Using Studio 11 on Solaris, the default is to compile for 32-bit mode. To build in 64-bit mode, add the option -xarch=generic64 (unless you are already using -xarch=v9) to every command line, compiling and linking.
Use separate directories for 32-bit and 64-bit object code.
But as Fedor points out, code is unlikely to work when built in 64-bit mode unless it was designed and tested to work in 64-bit mode. Code that was developed in 32-bit mode usually has many hidden assumptions that fail in 64-bit mode.
Studio 11 provides various tools to help you port 32-bit code to 64-bit code, but you must realize it is a porting job. It is not difficult to write code that is correct for both 32-bit and 64-bit modes, but you have plan for it.
