Ok, the issue with firebird3.0 in Debian has been resolved, see .
And, this isn't actually a toolchain or glibc regression, the behavior
is by design, see .
To cut a long story short, when using version scripts, an application
**must** always export the _IO_stdin_used symbol as it is used by glibc
to determine the libio ABI.
>  https://bugs.debian.org/840666
>  http://lists.gnu.org/archive/html/bug-glibc/2001-12/msg00203.html
** Bug watch added: Debian Bug tracker #840666
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FTBFS on powerpc
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