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Is this required to build using clang?

@ruffy Thanks for bringing this to my attention. Somehow the build was failing due to lto, and when I disabled that the build now succeeds in a chroot again. Let me know if that fixes the problem.

I get the same error as @VadeveSi below, also if I build it inside a chroot. How can I fix that?

To have full python support, the following needs to be added to compile option:

    -DCLINGO_BUILD_WITH_PYTHON=ON \

note that the package already depends on python and also has -DCLINGO_REQUIRE_PYTHON=ON

@VadeveSi The build succeeds in a clean chroot. Are you using a clean chroot?

Hi, I get an error when trying to install. I am using Lua 5.3.5 Thanks in advance.

Error:

[107/111] Linking CXX executable bin/gringo
FAILED: bin/gringo 
: && /usr/bin/clang++  -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -O3 -DNDEBUG  -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now   -rdynamic app/gringo/CMakeFiles/gringo.dir/main.cc.o  -o bin/gringo  -Wl,-rpath,/home/saltfactory/.cache/yay/clingo/src/build/bin:  bin/libpyclingo.so.1.0  bin/libluaclingo.so.1.0  bin/libclingo.so.3.0 && :
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_rotate'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_absindex'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_callk'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_pcallk'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_getglobal'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `luaL_loadbufferx'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_copy'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_tointegerx'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `luaL_requiref'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `luaL_setfuncs'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `luaL_checkversion_'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_tonumberx'
clang-10: error: linker command failed with exit code 1 (use -v to see invocation)
[108/111] Linking CXX executable bin/clingo
FAILED: bin/clingo 
: && /usr/bin/clang++  -D_FORTIFY_SOURCE=2 -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -O3 -DNDEBUG  -Wl,-O1,--sort-common,--as-needed,-z,relro,-z,now   -rdynamic app/clingo/CMakeFiles/clingo.dir/main.cc.o  -o bin/clingo  -Wl,-rpath,/home/saltfactory/.cache/yay/clingo/src/build/bin:  bin/libpyclingo.so.1.0  bin/libluaclingo.so.1.0  bin/libclingo.so.3.0 && :
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_rotate'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_absindex'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_callk'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_pcallk'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_getglobal'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `luaL_loadbufferx'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_copy'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_tointegerx'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `luaL_requiref'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `luaL_setfuncs'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `luaL_checkversion_'
/usr/bin/ld: bin/libluaclingo.so.1.0: undefined reference to `lua_tonumberx'
clang-10: error: linker command failed with exit code 1 (use -v to see invocation)
[109/111] Building CXX object libpyclingo/CMakeFiles/libpyclingom.dir/pyclingo.cc.o
ninja: build stopped: subcommand failed.
==> ERROR: A failure occurred in build().
    Aborting...
Error making: clingo

Yes, works now.

@ewirch Fixed. Does this work for you now?

You changed CXXFLAGS only for the cmake invocation. It will be the original CXXFLAGS when ninja (and clang+++) runs.

@ewirch Fixed by modifying CXXFLAGS to remove -fvar-tracking-assignments during build().