2011/8/29 Peter FELECAN <[email protected]>: > Maciej Bliziński <[email protected]> writes: > >> However, alternatives are not a viable solution for the buildfarm. We >> all work on the same hosts and we need to make it possible to build >> with gccN and gcc(N+1) at the same time. You can't have buildfarm >> admins flip symlink every time a maintainer wants to switch between >> e.g. gcc-3 and gcc-4. > > Just a follow up on my own advice to look how Debian does it... > > * How Debian manages multiple versions of GCC > Useful information is found, on an installed system, in > /usr/share/doc/gcc/README.Debian > ** Default version > Each Debian release has a default set of compilers issued by a > generic source package called gcc-defaults > > (http://ftp.de.debian.org/debian/pool/main/g/gcc-defaults/gcc-defaults_1.107.tar.gz) > The generated packages supply a symbolic link toward the default > driver, e.g., for the C compiler, there is /usr/bin/gcc which point > toward /usr/bin/gcc-4.6
Yes, I found out this can be done by using --program-suffix. > Note that you find the README.Debian in the above mentioned source > package. > ** Alternatives > Alternatives are used at a higher level, e.g., /usr/bin/cc is an > generic name, having cc as the alternative name with a possible > alternative path of /usr/bin/gcc > ** Using a non default version > When compiling with a non-default version of the compiler you must > explicitly specify the one that you wish to use, e.g. > CC=gcc-4.1 ./configure <configure options> > ** File-system organization > each version of GCC provides its specific components installed in > corresponding directories; e.g., /usr/lib/gcc/i486-linux-gnu/4.3; > this organization is directly supported by the GCC build system, > i.e., it doesn't need modifications > ** Run-time shared libraries > The run-time shared libraries conforms with the shared libraries > policy and thus supports multiple releases installed simultaneously > with one default version. > > * How Open CSW should manage multiple versions of GCC > I don't discuss here the integration of Sun Studio in the > alternatives system but that would be a nice feature. > ** Default version > the most recent version of GCC is considered as the default one and > provides the /usr/bin/gcc symbolic link > ** Alternatives > Use the cc as the generic name > ** Using a non default version > Same as Debian > ** File-system organization > Similar with that of Debian > ** Run-time shared libraries > Similar with that of Debian Roger that. The plan looks good. I'm compiling a new cut of the packages right now. Maciej _______________________________________________ maintainers mailing list [email protected] https://lists.opencsw.org/mailman/listinfo/maintainers .:: This mailing list's archive is public. ::.
