[Mingw-users] Fwd: How to link and compile with gcc ?

[Timothy M. <ter...@gm...>]

Hello

I have this problem I do not know the order libraries and object files
should be specified on the linker/gcc command line.

The gcc man page says symbols are searched in the files in the order
given on the command line, so an object file
that cames before a library can override symbols from the library. So
I reach the conclusion that if an object uses
a library the library should come first, and if  libzip uses libz,
than libz should come first.

But I find that the proper order is the opposite, as I get undefined
references if I use the libraries first.

g++ -o prog /mingw/lib/libz.a /mingw/lib/libzip.a prog.cc prog_module.cc

would give undefined references for symbols from libz and libzip, but

g++ -o prog prog.cc prog_module.cc /mingw/lib/libzip.a /ming/lib/libz.a

would compile and link successfully.

I also tried

g++ -o prog -static -static-libgcc prog.cc prog-module.cc -lzip -lz

And then I get undefined references to snprintf and strtol from libstdc++.a.

Do you know how can I get libzip and lz linked with -l switch to g++ ?

And how do I know the correct order of libraries on the command line if
I want to explicitly list the library files on the command line ?

How can I see all symbols exported from an object file ?

And how do I use functions in a .dll with MinGW and g++ ?
For example I want to use gtk+. I do not know if it compiles
with MinGW, but even if it does it looks like a complicated
task with little chances of success for me, so I would like
to use a pre-compiled .dll and call functions in it. How do I
do this ?

Thank you,
Timothy Madden