Re: Informix CLI and C++ on Unix

>Date: Thu, 07 Aug 1997 16:16:46 -0400 >From: Uday Shankar <uday@dpg.rnb.com> >X-Informix-List-Id: <list.15856> > >Has anyone tried using Informix CLI (the one which comes >with Informix 7.22) on the Unix platform from a C++ program ? > >When I use it from a C program, it works fine, but when I >compiled a C++ program on a Sun platform (I tried using >the GNU g++, the Sun Sparcworks and the CC compilers), I >go a bus error when I attempted to run the program. > >After much experimentation, I finally discovered that if I >have any references to cout or any stream operator in >my program, I get a bus error. This happens even if I >don't have any references to any Informix CLI or ESQL variables >or functions in my program. All I do is link with the Informix >CLI libraries. Earlier this week, I posted an updated version of the ESQL/C and C++ headers, compilation script, etc which I use when I need to mix C++ and ESQL/C. When I previously compiled the test code with that material (7th July), I was using 7.22.UC1 ESQL/C and GCC 2.7.2.2. I recompiled it today using ESQL/C 7.23.UC1 and both SUNWspro C++ compiler SC4.2 and GCC 2.7.2.2, it also worked fine. The test code uses cout both before and after database access. So, yes, it can be done. >Has anyone seen this behavior too ? No. >Does anyone have any workarounds ? Use the stuff I provide to do the job? It may or may not work for you. >I called Informix support, but they weren't of much help since >they said that this product was intended to be used in C programs >only and since I was attempting to use it in C++, it was in >effect, unsupported! Strictly, they are correct. That's one reason why there are the caveats in the code I provide. Soon, they will be out of date; a near-future version (7.24 as I understand it, but subject to change) will have more direct C++ support, including .ecpp files for C++ code with embedded ESQL/C material. This probably won't be a full ESQL/C++, so you probably won't be able to use classes and member functions and so on in the ESQL/C statements. But at least the compilation should be smooth and automatic (and only a few years behind the times!). Yours, Jonathan Leffler (johnl@informix.com) #include <disclaimer.h> PS: Warning I do not reply to messages with anti-spam in the return path.