Closed XAMPPRocky closed 3 years ago
Huh. I am also on macOS and cmake ..
worked fine for me. Could it be a CMake version thing? Are you building it together with LLVM or using a pre-built version?
I'm using a prebuilt LLVM 10.0.1 from pkgin
with CMake 3.20.0
$ cmake --help
Usage
cmake [options] <path-to-source>
cmake [options] <path-to-existing-build>
cmake [options] -S <path-to-source> -B <path-to-build>
Is it possible that you had what CMake thinks is an “existing build” in your llvm-cbe
directory and that's what confused it? Because otherwise I think -S
would be redundant.
Anyway, on my macOS setup with cmake 3.17.3 (from Homebrew) and on my Ubuntu setup with cmake 3.16.3, adding -S
seems to be harmless, so if this is the only fix for your problem then merging it seems okay.
For reference, this is the output when running cmake ..
and cmake -S ..
. If I had a guess (I don't use CMake day-to-day), it would be that cmake ..
is changing the current directory for the program, where as -S
doesn't.
➜ build git:(master) ✗ cmake ..
CMake Warning at /usr/local/Cellar/cmake/3.20.0/share/cmake/Modules/Platform/Darwin-Initialize.cmake:303 (message):
Ignoring CMAKE_OSX_SYSROOT value:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.1.sdk
because the directory does not exist.
Call Stack (most recent call first):
/usr/local/Cellar/cmake/3.20.0/share/cmake/Modules/CMakeSystemSpecificInitialize.cmake:21 (include)
CMakeLists.txt:3 (project)
-- Found LLVM 10.0.1
-- Using LLVMConfig.cmake in: /opt/pkg/lib/cmake/llvm
-- Linker detection: ld64
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/src/llvm-cbe
➜ build git:(master) ✗ cmake -S ..
-- The C compiler identification is AppleClang 12.0.5.12050022
-- The CXX compiler identification is AppleClang 12.0.5.12050022
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found LLVM 10.0.1
-- Using LLVMConfig.cmake in: /opt/pkg/lib/cmake/llvm
-- Linker detection: ld64
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/src/llvm-cbe/build
On macOS, I tried following the instructions to build, however I couldn't get it to work until I specified the source folder with
-S
.