Hello Ineiev, * Ineiev wrote on Tue, Apr 14, 2009 at 09:35:13AM CEST: > My goal was to use in an application two > versions of the same library simultaneously.
Hmm, I don't think this goal is achievable portably. At least not without renaming all symbols (i.e., you may need to change the source of at least one version of the library). > First, I built two shared modules, each wrapping-around > it's version of the encapsulated library and lt_dlopened > them (a sample is at > http://ineiev.users.sourceforge.net/samples/libex.tar.gz) > > This worked like a charm - under decent systems, I mean; > though when configured with --disable-shared, it just > does't open the libraries; and cygwin simply refused > to link the application. Can you show the error you're getting under Cygwin? Can you try adding -no-undefined to the library link flags and then build DLLs under Cygwin? > Then I thought that perhaps dlpreopened modules could do this. [...] > The build stopped on > .libs/dlpoS.o(.rodata+0x14): undefined reference to `bar' > .libs/dlpoS.o(.rodata+0x1c): undefined reference to `foo' > .libs/dlpoS.o(.rodata+0x34): undefined reference to `bar' > .libs/dlpoS.o(.rodata+0x3c): undefined reference to `foo' > > (The full project is at > http://ineiev.users.sourceforge.net/samples/dlpo.tar.gz) This build completes for me when I use --disable-shared. Without --disable-shared, you could be hitting a libtool bug (in that it chooses the shared libs for prelinking rather the static ones). > I have never had a chance to dig into libtool so deeply; > there are so many possibilities that I'm absolutely lost > (wrong libtool version; incorrect libtool/autotools setup; > invalid _FLAGS or macros invocations; > probably I should define lt_dlsymlist in my sources; > and may be this tool is not for such things at all). No, there is no need for you to define any symbol lists yourself; you shouldn't ever need to use lt_dlsymlist. Hope that helps. Cheers, Ralf _______________________________________________ http://lists.gnu.org/mailman/listinfo/libtool
