Link error when compiling with -fsanitize=undefined

[Scott Kostyshak]

On Sun, Sep 19, 2021 at 10:35:44AM +0200, Kornel Benko wrote:
> Am Sat, 18 Sep 2021 20:52:43 -0400
> schrieb Scott Kostyshak <skostysh at lyx.org>:
> 
> > On Sat, Sep 18, 2021 at 06:46:47PM +0200, Kornel Benko wrote:
> > > Am Sat, 18 Sep 2021 10:34:49 -0400
> > > schrieb Scott Kostyshak <skostysh at lyx.org>:
> > >   
> > > > > I tried but failed. The problem is that tex2lyx uses
> > > > > libzlibstatic.a, ../../lib/libsupport.a to link with, but these are compiled with
> > > > > -fsanitize. So the only way is to define dummy versions as Jean-Marc pointed
> > > > > out.    
> > > > 
> > > > Thank you for trying, Kornel!
> > > > 
> > > > Scott
> > > >   
> > > 
> > > Actually it was pretty easy. According to the error message,
> > > 	undefined reference to `typeinfo for lyx::xml::FontTag'
> > > looked wrong, since it is defined in xml.h. But  src/tex2lyx/dummy_impl.cpp used
> > > FontTag _and_ did not include it xml.h.
> > > 
> > > So inserting this include cured the compilation for me.  
> > 
> > That's great you figured it out and it doesn't add too much complexity to the code. Are
> > you sure it ended up using the -fsanitize=undefined flag ? If you do
> > 
> >   ldd build-dir/bin/lyx | grep ubsan
> > 
> > Does it show up?
> > 
> > Scott
> 
> 	libubsan.so.1 => /usr/lib/x86_64-linux-gnu/libubsan.so.1 (0x00007f49cdfd2000)

Great, I will experiment next week with it.

Thank you,

Scott
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