On 25/08/2015 19:43, Fernando Rodriguez wrote: > On Tuesday, August 25, 2015 12:30:09 PM Alan McKinnon wrote: >> On 25/08/2015 04:28, Fernando Rodriguez wrote: >>> On Monday, August 24, 2015 9:31:38 PM Alan McKinnon wrote: >>>> Does anyone have an opinion to offer on bug 501468? >>>> >>>> https://bugs.gentoo.org/show_bug.cgi?id=501468 >>>> >>>> It's been annoying me for a week now with this message: >>>> >>>> !!! existing preserved libs: >>>>>>> package: www-client/firefox-40.0.2 >>>> * - /usr/lib64/firefox/libmozalloc.so >>>> * used by /usr/lib64/thunderbird/components/libdbusservice.so >>>> (mail-client/thunderbird-38.2.0) >>>> * used by /usr/lib64/thunderbird/components/libmozgnome.so >>>> (mail-client/thunderbird-38.2.0) >>>> * used by >>>> /usr/lib64/thunderbird/distribution/extensions/{e2fda1a4-762b-4020-b5ad- >>> a41df1933103}/components/libcalbasecomps.so >>>> (mail-client/thunderbird-38.2.0) >>>> * used by 4 other files >>>> >>>> >>>> Both Mozilla products ship this file: >>>> >>>> $ locate libmozalloc >>>> /usr/lib64/firefox/libmozalloc.so >>>> /usr/lib64/thunderbird/libmozalloc.so >>>> >>>> and according to preserved libs, thunderbird linked to the firefox copy. >>>> The only offered solution on the bug is to use a MASK variable, which >>>> seems to me an ugly hammer to swat a fly. >>>> >>>> I was wondering if there's a better way been developed in the last year. >>> >>> Actually, now I have a general idea of what's going on and that sounds > like an >>> acceptable solution but perhaps I could be better. This is what happens: >>> >>> 1. revdep-rebuild uses ldd to find breakage. It finds breakage in >>> libdbusservice.so because firefox uses tricks to preload the library from > it's >>> directory. >>> 2. revdep-rebuild find that thunderbird provides the library and thinks it >>> needs to be rebuild. (And wrongly tells you that firefox links against it). >>> >>> A better way would be: >>> >>> 1. same as step 1 above >>> 2. revdep-rebuild checks the package that provides the broken binary (in > this >>> case the firefox package), if this package also provides the missing > library >>> then it's safe to ignore the problem. >>> 3. same as step 2 above. >>> >>> Another solution is to make patch firefox to use RPATH so ldd can find the >>> labraries, this would also make prelink work better with firefox but it's >>> probably not ideal to mantain. >> >> >> that does make sense. In my case, it's not revdep-rebuild causing >> problems, it's the preserved-rebuild message at the end of emerge -v >> >> At this level is there a difference? > > I don't know the details but it seems to me that portage either uses revdep- > rebuild to find breakage (without scanning the whole system) before deleting > the old libs for good or duplicates some of it's logic. Come to think of it, > the SEARCH_DIR_MASK may not be ideal because if I understand what it does > correctly then real breakage in firefox won't be detected. >
My thought too. To me, SEARCH_DIR_MASK is fine for things like /opt/skype because it's binary and either works or it doesn't, and when it doesn't there's not much I can do about it. It may be the least sucky of all available solutions, but it's still swatting a fly with a hammer -- Alan McKinnon [email protected]
