Changing default version of gcc (unknown/unresolved symbols)

QNX USERS QNX6 - OS
1

Problem:

Need to change the default compiler under QNX 6.3 from gcc 2.95.3 to gcc 3.3.5

Attempted:

Have changed the text in $QNX_HOST/etc/qcc/gcc/default to read:
       DIR=3.3.5
as suggested in another post, however gcc -v states that the version remains as 2.95.3, even after reboot.

any help would be appreciated, Im very new to qnx…

Cheers,
Josh

2

I wouldn’t recommend trying to change the default compiler.

I assume that you are using Momentics SE, since with PE, you simply right-click on the project, select properties->compiler and choose GCC 3.3.5. .

If you are using the QNX recursive makefile system with SE, then you can simply defined GCC_VERSION=3.3.5 in your common.mk file and your done.

3

Check out option -set-default and -V of qcc.

4

cheers for the help guys.
I am using scons and have changed the compiler flags to look for ntox86-gcc-3.3.5 and ntox86-g+±3.3.5 instead of the default, and that works fine for changing the compiler.

However it has not solved my initial problem, of unresolved/unknown symbols at run time. I have read on the forums that using a later version of gcc has helped in some cases, evidently I am not one of those cases.

I can use all symbols from static libraries, however its the dynamic libraries that are causing the problems…

Any ideas are welcome.

Cheers,
Josh

5

update:

looks to be a problem with object linking with respect to inheritance, namely virtual and pure virtual functions…

any ideas?

6

Josh,

Out of curiosity, are you attempting to run your executable on the same QNX box that your compiling on?

If not, it sounds like your missing a library on the final platform where you run.

I am using GCC 3.3.5 and C++ and I have not had any problems compiling and running (either from the IDE or directly on the QNX machine). Of course I am not compiling on 1 QNX machine and attempting to run on another (at least not yet).

Tim