On 06.01.2017 15:13, Szabolcs Nagy wrote: > On 06/01/17 13:11, Jakub Jelinek wrote: >> On Fri, Jan 06, 2017 at 01:07:23PM +0000, Szabolcs Nagy wrote: >>> On 06/01/17 12:48, Jakub Jelinek wrote: >>>> SUSE and some other distros use a hack that omits the minor and patchlevel >>>> versions from the directory layout, just uses the major number, it is very >>> >>> what is the benefit? >> >> Various packages use the paths to gcc libraries/includes etc. in various >> places (e.g. libtool, *.la files, etc.). So any time you upgrade gcc > > it is a bug that gcc installs libtool la files, > because a normal cross toolchain is relocatable > but the la files have abs path in them. > > that would be nice to fix, so build scripts don't > have to manually delete the bogus la files. > >> (say from 6.1.0 to 6.2.0 or 6.2.0 to 6.2.1), everything that has those paths >> needs to be rebuilt. By having only the major number in the paths (which is >> pretty much all that matters), you only have to rebuild when the major >> version of gcc changes (at which time one usually want to mass rebuild >> everything anyway). > > i thought only the gcc driver needs to know > these paths because there are no shared libs > there that are linked into binaries so no binary > references those paths so nothing have to be > rebuilt.
You also end up with dependencies of the form /usr/lib/gcc/<target>/<version>/../../.././include which then break when you update to a new branch version.
