Kjetil Torgrim Homme <kjetilho@linpro.no> writes: > If an application uses libc6 and libslang (say), it will break when > libslang is recompiled against libc7. Therefore the libc6 version of > libslang needs to retained in a libc6 specific directory for backwards > compatibility, and ld.so needs to know that /lib contains libc7 > libraries and should not be consulted for libraries for old libc6 > binaries. Nope. This was needed in the past, but nowadays every shared library should include proper dependency information. Every shlib on my system does depend on libc.so.6, for example -- see: $ objdump --private-headers /lib/libslang.so.1.4.4| grep NEEDED NEEDED libm.so.6 NEEDED libc.so.6 NEEDED libdl.so.2 If there are more libslang.so.1 versions available (for example one depending on libc.so.6, the other on libc.so.7), ld.so will only have to select the one matching up with the executable's dependencies. No special casing, and works for upgrades of every library. -- Robbe
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