Link error when compiling with -fsanitize=undefined

[Kornel Benko]

Am Fri, 17 Sep 2021 16:41:09 -0400
schrieb Scott Kostyshak <skostysh at lyx.org>:

> On Fri, Sep 17, 2021 at 10:22:28PM +0200, Kornel Benko wrote:
> > Am Fri, 17 Sep 2021 20:24:17 +0200
> > schrieb Jean-Marc Lasgouttes <lasgouttes at lyx.org>:
> >   
> > > Le 17/09/2021 à 20:21, Scott Kostyshak a écrit :  
> > > > /usr/include/c++/10/bits/stl_function.h:386:20: runtime error: load of value 128,
> > > > which is not a valid value for type 'ColorCode' /usr/include/c++/10/tuple:1693:70:
> > > > runtime error: load of value 128, which is not a valid value for type
> > > > 'ColorCode' /usr/include/c++/10/bits/stl_function.h:386:20: runtime error: load of
> > > > value 128, which is not a valid value for type
> > > > 'ColorCode' /home/scott/lyxbuilds/master/repo/src/Color.cpp:366:35: runtime error:
> > > > load of value 128, which is not a valid value for type
> > > > 'ColorCode' /home/scott/lyxbuilds/master/repo/src/Color.cpp:367:39: runtime error:
> > > > load of value 128, which is not a valid value for type
> > > > 'ColorCode' /home/scott/lyxbuilds/master/repo/src/Color.cpp:457:17: runtime error:
> > > > load of value 128, which is not a valid value for type
> > > > 'ColorCode' /home/scott/lyxbuilds/master/repo/src/Color.cpp:435:10: runtime error:
> > > > load of value 128, which is not a valid value for type
> > > > 'ColorCode' /home/scott/lyxbuilds/master/repo/src/Color.cpp:435:31: runtime error:
> > > > load of value 128, which is not a valid value for type
> > > > 'ColorCode' /home/scott/lyxbuilds/master/repo/src/Color.cpp:435:55: runtime error:
> > > > load of value 128, which is not a valid value for type
> > > > 'ColorCode' /home/scott/lyxbuilds/master/repo/src/Color.cpp:536:13: runtime error:
> > > > load of value 128, which is not a valid value for type
> > > > 'ColorCode' /home/scott/lyxbuilds/master/repo/src/MetricsInfo.cpp:174:6: runtime
> > > > error: load of value 128, which is not a valid value for type
> > > > 'ColorCode' /home/scott/lyxbuilds/master/repo/src/MetricsInfo.cpp:179:9: runtime
> > > > error: load of value 128, which is not a valid value for type
> > > > 'ColorCode' /home/scott/lyxbuilds/master/repo/src/support/Changer.h:41:59: runtime
> > > > error: load of value 128, which is not a valid value for type
> > > > 'ColorCode' /home/scott/lyxbuilds/master/repo/src/support/Changer.h:45:56: runtime
> > > > error: load of value 128, which is not a valid value for type
> > > > 'ColorCode' /home/scott/lyxbuilds/master/repo/src/Color.cpp:191:9: runtime error:
> > > > load of value 128, which is not a valid value for type 'ColorCode'
> > > > 
> > > > I don't have time to study how to fix it, but at least I can note it here in case
> > > > anyone does.    
> > > 
> > > This seems more interesting indeed. Looks like the same value 
> > > everywhere. I suspect we create synthetic color values in some 
> > > circumstances.
> > > 
> > > JMarc  
> > 
> > Seems, like an option for sanitize in cmake would be handy.
> > 	LYX_OPTION(DEBUG_SANITIZE "Enable sanitize check" OFF GCC)
> > 
> > ...
> > 	if (LYX_DEBUG_SANITIZE)
> > 		# some magic statements
> > 	endif()
> > 
> > 	Kornel  
> 
> That would be nice but might be some work and I don't know if others are interested. I
> think it's nice because the run-time hit on performance isn't bad. For example, with
> -fsanitize=undefined, I don't even notice it is slower. With ASAN it is noticeably
> slower (although still usable as opposed to using LyX with Valgrind).
> 
> Scott

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.

	Kornel
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