Gcc Compile and link

Gcc Compile and link

[Simon, Christine]

Hello,

I'm a "fresh" G++ ( and also C++) Programmer and have a problem  when compiling a program that needs to use XML libraries.

I work on a UNIX-AIX43 environmnent.

When compiling and linking a program i got the result that the linker (LD) I face the problem that LD cannot find the libraries needed.


The command line is as follows:

gcc xml1.cc -l/libgcc.a -l/libxalan-c1_3.a -l/libxerces-c1_6_0.a

Could someone help me with this?

Thanks
Chris

RE: Gcc Compile and link

[Rupert Wood]

Chris Simon wrote:

> When compiling and linking a program i got the result that 
> the linker (LD) I face the problem that LD cannot find the 
> libraries needed.
:
> gcc xml1.cc -l/libgcc.a -l/libxalan-c1_3.a -l/libxerces-c1_6_0.a

If you're compiling C++, you should use the compiler driver 'g++'
instead - although this won't make any difference if there's no link
step.

If you want to link path/libSomething.a, you have two choices:

    g++ <...> path/libSomething.a
 or g++ <...> -L path -lSomething

The '-l' flag assumes prefix 'lib' and suffix '.a' (or prefers '.so'
where available unless you specify '-static' - I think!) and uses the
library search paths specified with '-L', from the LIB environment
variable or built in to gcc.

You shouldn't have to explicitly link libgcc; it should do that
automatically.

So, fingers crossed, the command line you want is:

    g++ xml1.cc -lxalan-c1_3 -lxerces-c1_6_0

which will generate output executable with the default name 'a.out'. To
specify another name, use the '-o' flag.

Hope that helps!
Rupert.