[llvm-dev] Building LLVM on Mac

[mayuyu.io via llvm-dev]

The standalone Toolchain had always been troublesome and personally experience had always been installing the full Xcode suite, and use xcode-select -s to switch to it.

Other than that, You used the troublesome standalone toolchain initially so you might need to clear your build cache before switching to Xcode

Zhang

> 在 2021年5月4日，22:12，Abid Malik via llvm-dev <llvm-dev at lists.llvm.org> 写道：
> 
> Thanks, Boris and Tobias for the feedback.
> 
> The building always stuck at libcxxabi:
> ----
> /Users/abidmalik/Programming/MLIR_target/llvm-project/libcxxabi/include/cxxabi.h:43:26: error: unknown type name 'size_t'
> __cxa_allocate_exception(size_t thrown_size) throw();
>                          ^
> /Users/abidmalik/Programming/MLIR_target/llvm-project/libcxxabi/include/cxxabi.h:86:75: error: unknown type name 'uint64_t'
> extern _LIBCXXABI_FUNC_VIS _LIBCXXABI_ALWAYS_COLD int __cxa_guard_acquire(uint64_t *);
>                                                                           ^
> /Users/abidmalik/Programming/MLIR_target/llvm-project/libcxxabi/include/cxxabi.h:87:76: error: unknown type name 'uint64_t'
> extern _LIBCXXABI_FUNC_VIS _LIBCXXABI_ALWAYS_COLD void __cxa_guard_release(uint64_t *);
> 
> ----
> I tried with flag "-I/Users/abidmalik/Programming/MLIR_target/llvm-project/build/include/c++/v1" but I am getting:
>  /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/algorithm:641:
> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/cstring:77:9: error: no member named 'strncmp' in the global namespace
> using ::strncmp;
>  
> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1/cstring:78:9: error: no member named 'strcoll' in the global namespace
> using ::strcoll;
> 
> I feel I am not setting flags for C++ libraries correctly for MacBook ( Ubuntu is doing fine).
> 
> Thanks 
>                                                                            
> 
> On Tue, May 4, 2021 at 5:20 AM Tobias Hieta <tobias at plexapp.com> wrote:
>> > >  -DCMAKE_C_FLAGS="-isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk" -DCMAKE_CXX_FLAGS="-isysroot /Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk
>> >
>> > I do not use option -isysroot. Do these directories exist? I think you do not have to set it.
>> 
>> The right way to do this is to set -DCMAKE_OSX_SYSROOT - not to pass
>> isysroot directly.
>> 
>> -- Tobias
> 
> 
> -- 
> Abid M. Malik
> ******************************************************
> "I have learned silence from the talkative, toleration from the intolerant, and kindness from the unkind"---Gibran
> "Success is not for the chosen few, but for the few who choose" --- John Maxwell
> "Being a good person does not depend on your religion or status in life, your race or skin color, political views or culture. IT DEPENDS ON HOW GOOD YOU TREAT OTHERS"--- Abid
> "The Universe is talking to us, and the language of the Universe is mathematics."----Abid
>  
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