Problem building application with C++ 4.2 on Sun OS 5.9

Question

I have an application that builds fine with "WorkShop Compilers 4.2 30 Oct 1996 C++ 4.2" on SunOS devbox1 5.6 Generic_105181-33 sun4u sparc SUNW,Ultra-Enterprise
On the same file system, I am trying to build the application on "SunOS devbox2 5.9 Generic_117171-12 sun4u sparc SUNW,Sun-Fire-V440"
I see that files like sys/siginfo.h do not get included. I guess C++ compiler should include such files by default (in the first case it does happen).
Also, when I add -H option to the compiler to see the header files included, I see that the headers included in the first as well as the second case are different.
Does anyone know why this is so?

Answer 1

Workshop 4.2 is not expected to work on Solaris 9. Workshop 4.2 is long past its End Of Service Life, and no support of any kind is available for it.
You can download the latest product, Sun Studio 11, and use it for free:
http://developers.sun.com/sunstudio/
Sun Studio 11 C++ (C++ 5.8) offers a mode where it is compatible with C++ 4.2. It compiles valid source code that C++ 4.2 compiled, and you can link binaries created by C++ 4.2 into programs built with Sun Studio 11.
Full details are in the C++ Migration Guide that comes with the compiler.
Regarding missing system header files in /usr/include or /usr/include/sys:
To compile programs on Solaris, Solaris must have been installed as a "developer" or "full" release. If you install only the minimum, you will be missing many features necessary for compiling programs.