🚀 go-pugleaf

kevinl@tisdec.tis.tandy.com writes:
: 
: When using GNU C/C++ for OS/2, I am unable to run the programs it
: produces.
: 
: Everything compiles and links OK when just compiling a C program,
: but when I try to run it, OS/2 stops the program and says it
: created a problem and cannot continue.
: 
: When I try to link a C++ program I get unresolved externals that
: look something like __?????__, where ? represents some character--
: some undefined constant I think.

A C++ program? C++ is a portable language -- it says. Well, it isn't! I had
several C programs that do not work on OS/2 without modifications, and mostly
there are exactly those errors of unresolved externals. Maybe you didn't link
all necessary libraries. Maybe GNU C does not support commands your program
has. If you want to port C programs from Unix, you better take EMX/GCC, because
it has been designed for this purpose (of porting from Unix). Otherwise you
must try to replace the unknown commands with others that GCC knows.


: Also, when link386 finishes, it says that the program type is not
: specified "assuming WINDOWCOMPAT."  How do I specify the program type?
: I tried the /PMTYPE option, but it did not help.  This is really
: secondary.  I don't mind the message as long as I can get the programs
: to actually _run_.


If your programs run in an OS/2 window in character mode there is no problem.
Because this is the setting LINK386 supposes. If your application is for PM,
you must define a .def-file. See the documentation with EMX/GCC for the
settings of the definitions file.


           Aurelio Caliaro