At Sun, 09 Nov 2008 12:24:03 +0100 Hans Schmidt <[EMAIL PROTECTED]> wrote:
> > Robert Heller wrote: > > At Sun, 09 Nov 2008 00:09:50 +0100 Hans Schmidt <[EMAIL PROTECTED]> wrote: > > > >> Hi there! > >> > >> I am trying to force a gcc4.x compiler to use the libstdc++5 per default. > >> > >> This is needed because some "binary-only" Shared Libaries supplied by a > >> 3rd party vendor uses libstdc++5. > >> > >> libstdc++5 is used by gcc-3.3 compilers - but unfortunately a gcc-4x is > >> needed to compile the project. > >> > >> I spent some days of work to force a gcc-4x to use libstdc++5 per > >> default. But I did not come closer to a solution. > >> > >> Do you have any ideas? > > > > It is not possible (as you have discovered). Versions of libstdc++ are > > tightly tied to compiler versions. You will *have* to modify your code > > to compile under gcc-3.3, probably by not using the features of gcc-4x > > your project now uses -- you will have to hack around the missing > > features. > > > > Either that or talk to the 3rd party vendor and try to get them to > > re-build their libraries using gcc-4x & libstdc++6. > > > > Another possiblity is to build a gcc-3.3/libstdc++5 wrapper application > > that is run as a separate process from your main gcc-4x project and pass > > data back and forth with sockets or pipes. > > > >> > > > > That was my concern. > > Regarding the gcc documentation gcc-3.3 uses abi version 1, and gcc-4.x > uses abi version 2. gcc-3.4 and later also use abi version 2. > > The gcc option -fabi-version=1 sounds like it should be possible to > force the usage of the older abi. > > So I have recompiled the whole project with -fabi-version=1. But that > seems to have no effect. > > What is -fabi-version used for? Something else... The issue with the library version has to do with name-mangling. g++ 3.x and g++ 4.x use different name-mangling -- this means that you cannot link g++ 4.x compiled code with a libstdc++ compiled with g++ 3.x (and vice versa). There is no way around this. And you can't use your third party library with g++ 4.x if it was compiled with g++ 3.x (which appears to be the case). You *have* to use the same (major) compiler version for your project as your third party library was compiled with or just don't use the third party library at all. > > -- Robert Heller -- Get the Deepwoods Software FireFox Toolbar! Deepwoods Software -- Linux Installation and Administration http://www.deepsoft.com/ -- Web Hosting, with CGI and Database [EMAIL PROTECTED] -- Contract Programming: C/C++, Tcl/Tk _______________________________________________ help-gplusplus mailing list help-gplusplus@gnu.org http://lists.gnu.org/mailman/listinfo/help-gplusplus
