Il 17/09/2013 07:40, Richard Henderson ha scritto: > On 09/16/2013 06:29 PM, Fam Zheng wrote: >>> Link spice-qemu.char.so against spice-core.so. The DT_NEEDED entry will be >>> recorded, and ld.so will do the right thing. >>> >>> Anything else sounds way too much like Not Invented Here. >>> >> How to do the symbol checking as above if spice-core.so is automatically >> loaded >> by ld.so? > > You're checking the version stamp in spice-char.so. I'd think that's good > enough. No need to transitively check. > >> And we will need to add $moddir to LD_LIBRARY_PATH and lose the restriction >> of >> modules directory too. > > Or add DT_RUN_PATH to the main executable, or even add DT_RUN_PATH to the > module itself. In particular, link the module with > > -Wl,--enable-new-dtags -Wl,-rpath,'$ORIGIN' > > and dependencies for the module will automatically be looked for in the > directory in which the module is found. Which is almost certiainly the only > thing that we want -- all modules in the same directory.
This is not portable. It looks like it can be emulated on Windows using LoadLibraryEx with the LOAD_WITH_ALTERED_SEARCH_PATH flag and passing an absolute path to the shared library. But on Mac OS X a bundle (module loaded with dlopen) cannot have a dependency on another bundle, afaik. Paolo
