[ghemical-devel] linking stage goes wrong in Debian g++

[Tommi Hassinen]

Ok, the "reverse experiment" seems to prove that the final linking stage
is the one where dynamic_cast problems appear. There seems to be nothing
wrong with the object (.o) files and library (.a) files produced by Debian
g++ and other tools (ar + ranlib).

What I did was that in a Debian machine, I took the v1.00 sources and did

	export CC=gcc-3.2
	export CXX=g++-3.2
	./configure
	make

as usual, and tarred the whole directory. Tested the executable
bin/ghemical and noted that it crashes in dyn-cast statements. Then I
moved the tar-package to a RedHat9 machine, un-tarred and did

	./configure

to change the compiler etc settings. Then I removed the executable and
just re-linked it using RedHat libs and g++:

	rm bin/ghemical
	make

The resulting executable, built using Debian-made .o and .a files, worked
without a hitch. JII-HAA!  :)

So, it's either in libraries or in linker. The fact that both g++-3.0 and
g++-3.2 has the same behaviour might suggest (but does not prove) that
there is a non-functional library that both linkers use?

Is there anything else that I could test?

Regards,

	Tommi