Re: Link error when compiling with -fsanitize=undefined

[Scott Kostyshak]

On Thu, Sep 16, 2021 at 10:13:15PM +0200, Kornel Benko wrote:
> Am Thu, 16 Sep 2021 15:12:34 -0400
> schrieb Scott Kostyshak <skost...@lyx.org>:
> 
> > I was curious about compiling with -fsanitize=undefined.
> > 
> > When building (with CMake), I get the following:
> > 
> > [ 93%] Linking CXX executable ../../bin/tex2lyx
> > cd /home/scott/lyxbuilds/master/CMakeBuild/src/tex2lyx && /usr/bin/cmake -E
> > cmake_link_script CMakeFiles/tex2lyx.dir/link.txt --verbose=1 
> > /usr/lib/ccache/c++ -Wall
> > -Wextra -Wno-deprecated-copy --std=c++20 -DENABLE_ASSERTIONS=1 
> > -fsanitize=undefined
> > -fno-strict-aliasing  -O0 -g3 -D_DEBUG  -fsanitize=undefined -rdynamic
> > CMakeFiles/tex2lyx.dir/Context.cpp.o CMakeFiles/tex2lyx.dir/Parser.cpp.o
> > CMakeFiles/tex2lyx.dir/Preamble.cpp.o CMakeFiles/tex2lyx.dir/boost.cpp.o
> > CMakeFiles/tex2lyx.dir/dummy_impl.cpp.o CMakeFiles/tex2lyx.dir/math.cpp.o
> > CMakeFiles/tex2lyx.dir/table.cpp.o CMakeFiles/tex2lyx.dir/tex2lyx.cpp.o
> > CMakeFiles/tex2lyx.dir/text.cpp.o
> > CMakeFiles/tex2lyx.dir/__/graphics/GraphicsParams.cpp.o
> > CMakeFiles/tex2lyx.dir/__/insets/ExternalTemplate.cpp.o
> > CMakeFiles/tex2lyx.dir/__/insets/ExternalTransforms.cpp.o
> > CMakeFiles/tex2lyx.dir/__/insets/InsetLayout.cpp.o
> > CMakeFiles/tex2lyx.dir/__/Author.cpp.o 
> > CMakeFiles/tex2lyx.dir/__/CiteEnginesList.cpp.o
> > CMakeFiles/tex2lyx.dir/__/Color.cpp.o 
> > CMakeFiles/tex2lyx.dir/__/Counters.cpp.o
> > CMakeFiles/tex2lyx.dir/__/Encoding.cpp.o 
> > CMakeFiles/tex2lyx.dir/__/FloatList.cpp.o
> > CMakeFiles/tex2lyx.dir/__/Floating.cpp.o 
> > CMakeFiles/tex2lyx.dir/__/FontInfo.cpp.o
> > CMakeFiles/tex2lyx.dir/__/LaTeXPackages.cpp.o 
> > CMakeFiles/tex2lyx.dir/__/Layout.cpp.o
> > CMakeFiles/tex2lyx.dir/__/LayoutFile.cpp.o
> > CMakeFiles/tex2lyx.dir/__/LayoutModuleList.cpp.o 
> > CMakeFiles/tex2lyx.dir/__/Lexer.cpp.o
> > CMakeFiles/tex2lyx.dir/__/ModuleList.cpp.o 
> > CMakeFiles/tex2lyx.dir/__/TextClass.cpp.o
> > CMakeFiles/tex2lyx.dir/__/Spacing.cpp.o 
> > CMakeFiles/tex2lyx.dir/__/version.cpp.o
> > -o ../../bin/tex2lyx  ../../lib/libsupport.a
> > -lmagic /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5.15.2 
> > /usr/lib/x86_64-linux-gnu/libQt5Core.so.5.15.2
> > -lz /usr/bin/ld: CMakeFiles/tex2lyx.dir/dummy_impl.cpp.o:(.data.rel+0x118): 
> > undefined
> > reference to `typeinfo for lyx::xml::FontTag' collect2: error: ld returned 
> > 1 exit status
> > 
> > Any tip on how to solve this?
> > 
> > Scott
> 
> We may need to include src/xml.cpp to the list of files for tex2lyx.
> (line src/tex2lyx/CMakeLists.txt:13)

Thanks! Your suggestion worked for this linker error, but then I got new linker 
errors. I kept adding to the list, but I keep getting new linker errors. 
Currently I have the following:

--- a/src/tex2lyx/CMakeLists.txt
+++ b/src/tex2lyx/CMakeLists.txt
@@ -14,7 +14,7 @@ foreach(_src graphics/GraphicsParams insets/ExternalTemplate
        insets/ExternalTransforms insets/InsetLayout Author CiteEnginesList 
Color Counters
        Encoding FloatList Floating FontInfo LaTeXPackages Layout
        LayoutFile LayoutModuleList Lexer ModuleList TextClass
-       Spacing version)
+       Spacing version xml Layout Paragraph BufferParams)
        list(APPEND LINKED_sources ${TOP_SRC_DIR}/src/${_src}.cpp)
        list(APPEND LINKED_headers ${TOP_SRC_DIR}/src/${_src}.h)
 endforeach(_src)

But I still get linker errors. I can keep proceeding to add them individually 
if that is what we need to do. But I wanted to check to make sure that's what 
we should do.

I should add that being able to compile with -fsanitize=undefined is not so 
important. If this seems like a tricky issue, I am fine to give up for now :)

Scott

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