Michael Matz fdeeb62e28 Fix symbol versions with shared libs ...

ELF files that refer to shared libs containing sym-versions, but
don't refer to any dynamic symbols with symbol versions (should happen
only with very simple shared libs) would generate an empty .gnu.version_r
section.  Some dynamic linker contain bugs in that they don't check
the section size or DT_VERNEEDNUM (which are both zero for such files
we generate) before accessing the first entry, and then bail out with
a message like

./a.exe: error while loading shared libraries: ./a1.so: unsupported
 version 25960 of Verneed record

(where the "version number" actually comes from neighboring bytes
from different sections).

So, there's not much choice, we simply must not generate such section.

2020-01-20 05:31:09 +01:00

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