[cfe-dev] How to link against lib/libclang in developing a clang-tools-extra project?

[Kristóf Umann via cfe-dev]

Hmm, try adding "libclang" the same way you added clangFrontend! No idea
whether that'll work, but after looking around, that's how other cmake
files seem to do it.

Lou Wynn via cfe-dev <cfe-dev at lists.llvm.org> ezt írta (időpont: 2018. okt.
25., Cs, 5:13):

> Hi,
>
> I'm writing a small clang tool in the clang-tools-extra directory by using
> the monorepo. My CMakeList.txt files is as follows:
>
> set(LLVM_LINK_COMPONENTS Support)
>
> add_clang_executable(loop-convert
>   LoopConvert.cpp
>   )
>
> target_link_libraries(loop-convert
>   PRIVATE
>   clang
>   clangAST
>   clangASTMatchers
>   clangBasic
>   clangFrontend
>   clangTooling
>   )
>
>
> When I ran the build command, I got a linker error complaining that
> functions in lib/libclang.so cannot be found:
>
> $ ninja loop-convert
> [1/1] Linking CXX executable bin/loop-convert
> FAILED: : && /usr/bin/clang++-6.0   -fPIC -fvisibility-inlines-hidden
> -Werror=date-time -Werror=unguarded-availability-new -std=c++11 -Wall
> -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual
> -Wmissing-field-initializers -pedantic -Wno-long-long
> -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor
> -Wdelete-non-virtual-dtor -Wstring-conversion -fdiagnostics-color
> -fno-common -Woverloaded-virtual -Wno-nested-anon-types -g
> -fuse-ld=lld-6.0 -Wl,--color-diagnostics -Wl,-allow-shlib-undefined
> tools/clang/tools/extra/loop-convert/CMakeFiles/loop-convert.dir/LoopConvert.cpp.o
> -o bin/loop-convert  lib/libLLVMSupport.so.8svn -lpthread
> lib/libclangAST.so.8svn lib/libclangASTMatchers.so.8svn
> lib/libclangBasic.so.8svn lib/libclangFrontend.so.8svn
> lib/libclangTooling.so.8svn -Wl,-rpath,"\$ORIGIN/../lib" && :
> /usr/bin/ld.lld-6.0: error: undefined symbol: clang_getCString
> >>> referenced by LoopConvert.cpp:7
> (/home/lu/work/git-repos/llvm-mono/llvm-project/clang-tools-extra/loop-convert/LoopConvert.cpp:7)
> >>>
> tools/clang/tools/extra/loop-convert/CMakeFiles/loop-convert.dir/LoopConvert.cpp.o:(operator<<(std::ostream&,
> CXString const&))
>
> ...
>
>
> It is clear that the lib/libclang.so.8svn is missing from the command line
> invoked by ninja. How can I add it into the build command? The "clang" line
> in the CMakeList.txt file doesn't work.
>
> Thanks.
>
> --
> Love,
> Lou
>
>
> _______________________________________________
> cfe-dev mailing list
> cfe-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-dev
>
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