Re: shared libraries

On Mon, 12 Jan 1998, Michal Hajek wrote: > HP-UX 9.04 (10.20 in a few weeks), OnLine 5. > > Can informix use shared libraries, saved in a saparate file, out > of programs, which use common functions ? I'd like to decrease > size of programs (2 - 15 MB each, and a lot of common functions. > When 130 users works at the same time ...wasted memory, seems to me.) > > 1) two or more instances of the same program and only one copy of > shared functions in memory > > 2) two or more instances of different programs, but using common > (same) functions and only one copy of the functions in memory > > Is any of the points possible ? It depends on which language you're talking about. If it is I4GL, then you should be using a 4.1x (x >= 4), and you can add the -shared option to make the I4GL programs use the I4GL shared library. You can also enforce this by setting C4GLFLAGS="-shared" in your environment, or adding " -shared" to the end of your current C4GLFLAGS environment variable. If you're using ESQL/C, you are probably stuck -- ESQL/C 5.0x does not, in general, have shared libraries. If you want to write your own shared libraries, that's fine; both ESQL/C and I4GL will use them. You may have to pass the correct options through the c4gl script to the C compiler; that can be tricky. Yours, Jonathan Leffler (johnl@informix.com) #include <witticism.h>