[llvm-dev] Build on macOS Catalina (original) (raw)

Dmitry Babokin via llvm-dev llvm-dev at lists.llvm.org
Tue Feb 18 10:12:24 PST 2020

Hi Luca,

You need C and C++ library headers.

C headers come as part of macOS SDK. To let compiler know about its location you need to add -DDEFAULT_SYSROOT=xcrun --show-sdk-path to CMake configuration.

C++ headers come from the toolchain. I.e. they are part of clang distribution, so you can either link to existing clang location or build libc++ to your clang build (I think this is better option): -DLLVM_ENABLE_PROJECTS=libcxx;libcxxabi

Dmitry.

On Tue, Feb 18, 2020 at 9:35 AM Luca Ciciriello via llvm-dev < llvm-dev at lists.llvm.org> wrote:

Hi all.

I’ve built and installed llvm+clang from git repository on macOS Catalina. My problem now is that I get the following error building my cpp file: clang++ -std=c++17 testcpp.cpp -o test In file included from testcpp.cpp:1: In file included from /usr/local/clangllvm/bin/../include/c++/v1/iostream:37: In file included from /usr/local/clangllvm/bin/../include/c++/v1/ios:214: In file included from /usr/local/clangllvm/bin/../include/c++/v1/iosfwd:95: /usr/local/clangllvm/bin/../include/c++/v1/wchar.h:118:15: fatal error: 'wchar.h' file not found #includenext <wchar.h> ^~~~~~~~~ 1 error generated. I get this error only on macOS and not on Linux. I’ve followed the same procedure on Linux and MacOS On macOS I’ve created the links: ln -s /usr/local/clangllvm/include/c++ /usr/local/include/c++ but this doesn’t solve the problem. Any idea? Best regards Luca Ciciriello

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