Using 'solib-search-path' on 64/32-bit targets

[Dmitry Antipov]

For the remote debugging on a 64-bit target with 32-bit compatibility, is it reasonable
to have gdb.setup with 'solib-search-path' pointed to both 64- and 32-bit libraries
(say, 'set solib-search-path /path/to/target/fs/lib64:/path/to/target/fs/lib32')? Currently GDB
just gives up the search if an inappropriate library is found, and will not try to examine
the rest of 'solib-search-path' entries. IOW if we're debugging 32-bit process with libXXX.so
dependency and 'solib-search-path' is set as above, /path/to/target/fs/lib32/libXXX.so won't
be found if /path/to/target/fs/lib64/libXXX.so is present. Attached is a simple attempt to
"fix" that behavior (toggled by new 'solib-search-giveup' flag), but I'm not sure whether
it needs to be "fixed" in that way at all :-).

Dmitry

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