llvm/bin/clang - broken. macOS Ventura

[IgorehaV]

Hi guys. I've an issue with ./build.sh and really can't understand where the problem.
Here is the log from terminal:
`-- Check for working C compiler: /usr/local/opt/llvm/bin/clang
-- Check for working C compiler: /usr/local/opt/llvm/bin/clang - broken
CMake Error at /usr/local/Cellar/cmake/3.24.3/share/cmake/Modules/CMakeTestCCompiler.cmake:69 (message):
The C compiler

"/usr/local/opt/llvm/bin/clang"

is not able to compile a simple test program.

It fails with the following output:

Change Dir: /Users/admin/Documents/AirSim/build_release/CMakeFiles/CMakeTmp

Run Build Command(s):/usr/bin/make -f Makefile cmTC_8ccbc/fast && /Applications/Xcode.app/Contents/Developer/usr/bin/make  -f CMakeFiles/cmTC_8ccbc.dir/build.make CMakeFiles/cmTC_8ccbc.dir/build
Building C object CMakeFiles/cmTC_8ccbc.dir/testCCompiler.c.o
/usr/local/opt/llvm/bin/clang   -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.0.sdk -MD -MT CMakeFiles/cmTC_8ccbc.dir/testCCompiler.c.o -MF CMakeFiles/cmTC_8ccbc.dir/testCCompiler.c.o.d -o CMakeFiles/cmTC_8ccbc.dir/testCCompiler.c.o -c /Users/admin/Documents/AirSim/build_release/CMakeFiles/CMakeTmp/testCCompiler.c
Linking C executable cmTC_8ccbc
/usr/local/Cellar/cmake/3.24.3/bin/cmake -E cmake_link_script CMakeFiles/cmTC_8ccbc.dir/link.txt --verbose=1
/usr/local/opt/llvm/bin/clang  -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX13.0.sdk -Wl,-search_paths_first -Wl,-headerpad_max_install_names CMakeFiles/cmTC_8ccbc.dir/testCCompiler.c.o -o cmTC_8ccbc 
ld: library not found for -lSystem
clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
make[1]: *** [cmTC_8ccbc] Error 1
make: *** [cmTC_8ccbc/fast] Error 2

CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
CMakeLists.txt:2 (project)

-- Configuring incomplete, errors occurred!`

My Mac is on Ventura OS. The latest Xcode version and seems to be the latest Xcode Command tools base on xcode-select install command.
-- The C compiler identification is Clang 15.0.3
-- The CXX compiler identification is Clang 15.0.3

I tried to changes llvm to llvm@15 in the setup.sh but it doesn't help me. The same error still appears.

Best regards

[deonblaauw]

I had a similar problem when trying to build for Unity using the build.sh file under AirSim/Unity.

I managed to fix this today by using which clang and which clang++ to get the path where the compilers are installed, then I changed my build.sh file (under AirSim/Unity). Mine were both under /usr/bin/ , this is the section in the build.sh file I changed:

if [ "$(uname)" == "Darwin" ]; then
    export CC=/usr/bin/clang
    export CXX=/usr/bin/clang++
else
    export CC="clang-8"
    export CXX="clang++-8"
fi

I also had to do sudo xcode-select --install to get the script to work (remember to restart your terminal after using this command)

[imccs9911]

Same problem 😒

[Mio-Atse]

I had a similar problem when trying to build for Unity using the build.sh file under AirSim/Unity.

I managed to fix this today by using which clang and which clang++ to get the path where the compilers are installed, then I changed my build.sh file (under AirSim/Unity). Mine were both under /usr/bin/ , this is the section in the build.sh file I changed:

if [ "$(uname)" == "Darwin" ]; then
    export CC=/usr/bin/clang
    export CXX=/usr/bin/clang++
else
    export CC="clang-8"
    export CXX="clang++-8"
fi

I also had to do sudo xcode-select --install to get the script to work (remember to restart your terminal after using this command)

Thanks it works!

Also you may need to clear cmake and cache files with following, then ./setup.sh and ./build.sh again.

rm -f CMakeCache.txt
rm -rf CMakeFiles/