64-bit libC.so.5 in Solaris 9

Question

Any alternative for the 64-bit libC.so.5 in Solaris 9? I could not find in in the directory /usr/lib/sparcv9. Or any patch or new packages should I install? Thanks,
Qinghuai

Answer 1

Library libC.so.5 provides the runtime support for code compiled by C++ 4.x, or by C++ 5.x using the -compat=4 option. Neither C++ 4.x nor C++ 5.x in compatibility mode generates 64-bit code. That's why there is no 64-bit version of libC.so.5.
I sometimes see old makefiles or scripts left over from C++ 4.x days that use the -lC option (link with libC.so) explicitly. When you try to use -lC with -xarch=v9, the link fails because there is no 64-bit libC.
The option -lC is not appropriate when using C++ 5.x in default standard mode, because that library cannot be used with standard-mode code.
If you are building an executable, do not use -l options for the standard support libraries. The CC driver will link the appropriate libraries automatically for you, based on the other options you supply, such as -library=xxx or -xia or -compat=xxx options.
If you are building a shared library, you need to mention any shared libraries that you want your library to depend on. You can use the -library=xxx option, or -l options. The -library=xxx option is usually more convenient, because the CC driver adjusts automatically for other options that might affect which library version you need.
In default standard mode, basic C++ runtime support is in library libCrun. If you want a shared library to depend on libCrun, you can add "-library=Crun" or "-lCrun" to the "CC -G" command line.