On 21/03/2019 23:11, David Rohr wrote:
During compilation on gentoo linux 64 bit with GCC 8.3 of libreoffice 6.2.1.2 I get the following error: mailconfigpage.cxx:(.text+0x3171): undefined reference to `non-virtual thunk to cppu::PartialWeakComponentImplHelper<com::sun::star::mail::XConnectionListener>::acquire()' I can fix this by appending template class cppu::PartialWeakComponentImplHelper<com::sun::star::mail::XConnectionListener>; at the end of mailconfigpage.cxx I filed a bug report here (https://bugs.documentfoundation.org/show_bug.cgi?id=124225) but was asked to write to the mailing list instead.
This looks like a compiler bug. Any such thunks should be emitted weakly in mailconfigpage.o. (What complicates things is that there can be thunks for that virtual function with different offsets, and while the offsets are encoded in the mangled symbol names, the demangled version is just "non-virtual thunk to ..." without a mention of the offset, and ld unhelpfully only reports the demangled name.) For example, in my Linux x86-64 build, I have
$ nm workdir/CxxObject/sw/source/ui/config/mailconfigpage.o | grep '_ZThn.*_N4cppu30PartialWeakComponentImplHelperIJN3com3sun4star4mail19XConnectionListenerEEE7acquireEv' 0000000000000000 W _ZThn32_N4cppu30PartialWeakComponentImplHelperIJN3com3sun4star4mail19XConnectionListenerEEE7acquireEv 0000000000000000 W _ZThn72_N4cppu30PartialWeakComponentImplHelperIJN3com3sun4star4mail19XConnectionListenerEEE7acquireEv 0000000000000000 W _ZThn80_N4cppu30PartialWeakComponentImplHelperIJN3com3sun4star4mail19XConnectionListenerEEE7acquireEv
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