Although High Sierra is no longer supported by Homebrew, but I need to install llvm@13 formula as a dependency for other formulas. So I tried to install it this way:
$ brew install llvm
...
==> Downloading https://github.com/llvm/llvm-project/releases/download/llvmorg-13.0.0/llvm-project-13.0.0.src.tar.xz
Already downloaded: /Users/username/Library/Caches/Homebrew/downloads/8fd68fc8f968137c5080826db6e58682326235960fd8469363eb27d0799978ca--llvm-project-13.0.0.src.tar.xz
...
==> Installing llvm
==> cmake -G Unix Makefiles .. -DLLVM_ENABLE_PROJECTS=clang;clang-tools-extra;lld;lldb;mlir;polly -DLLVM_ENABLE_RUNTIMES=compiler-rt;libcxx;libcxxabi;libunwind;openmp -DLLVM_POLLY_L
==> cmake --build .
...
[ 79%] Built target lldELF
make: *** [all] Error 2
An error is occurred after a long time of compilation. I also found this error in ~/Library/Logs/Homebrew/llvm/02.cmake:
/tmp/llvm-20211109-12151-m0zvtm/llvm-project-13.0.0.src/lldb/source/Host/macosx/objcxx/HostInfoMacOSX.mm:246:52: error: use of undeclared identifier 'CPU_SUBTYPE_ARM64E'
if (cputype == CPU_TYPE_ARM64 && cpusubtype == CPU_SUBTYPE_ARM64E) {
^
1 error generated.
make[2]: *** [tools/lldb/source/Host/macosx/objcxx/CMakeFiles/lldbHostMacOSXObjCXX.dir/HostInfoMacOSX.mm.o] Error 1
make[1]: *** [tools/lldb/source/Host/macosx/objcxx/CMakeFiles/lldbHostMacOSXObjCXX.dir/all] Error 2
How can I fix that compilation error?
Install llvm with debug mode enabled:
$ brew install --debug llvm
Installation process encounters with the same error mentioned in the question, but some options are provided to fix the issue. Choose option 5:
- raise
- ignore
- backtrace
- irb
- shell
Choose an action: 5
It gives a shell access to the current build directory of llvm formula. Find the current folder:
$ pwd
/private/tmp/llvm-20211109-12151-m0zvtm/llvm-project-13.0.0.src
Change the location to the build directory:
cd llvm/build
Edit the HostInfoMacOSX.mm and remove the second part of condition:
vi ../../lldb/source/Host/macosx/objcxx/HostInfoMacOSX.mm
You need to change the line 246 from:
if (cputype == CPU_TYPE_ARM64 && cpusubtype == CPU_SUBTYPE_ARM64E) {
to:
if (cputype == CPU_TYPE_ARM64) {
Then re-run the last command:
$ cmake --build .
It takes some time to be completed:
...
[100%] Linking CXX executable ../../../../bin/lldb-vscode
cd /tmp/llvm-20211109-12151-m0zvtm/llvm-project-13.0.0.src/llvm/build/tools/lldb/tools/lldb-vscode && /usr/local/Cellar/cmake/3.21.4/bin/cmake -E cmake_link_script CMakeFiles/lldb-v
scode.dir/link.txt --verbose=1
/usr/local/Homebrew/Library/Homebrew/shims/mac/super/clang++ -stdlib=libc++ -fPIC -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wn
o-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-c
lass-memaccess -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wno-deprecated-declarations -Wno-unkn
own-pragmas -Wno-strict-aliasing -Wno-deprecated-register -Wno-vla-extension -O3 -DNDEBUG -Wl,-search_paths_first -Wl,-headerpad_max_install_names -stdlib=libc++ -Wl,-sectcreate,__
TEXT,__info_plist,/tmp/llvm-20211109-12151-m0zvtm/llvm-project-13.0.0.src/llvm/build/tools/lldb/tools/lldb-vscode/lldb-vscode-Info.plist -Wl,-dead_strip CMakeFiles/lldb-vscode.dir/
lldb-vscode.cpp.o CMakeFiles/lldb-vscode.dir/BreakpointBase.cpp.o CMakeFiles/lldb-vscode.dir/ExceptionBreakpoint.cpp.o CMakeFiles/lldb-vscode.dir/FifoFiles.cpp.o CMakeFiles/lldb-vsc
ode.dir/FunctionBreakpoint.cpp.o CMakeFiles/lldb-vscode.dir/IOStream.cpp.o CMakeFiles/lldb-vscode.dir/JSONUtils.cpp.o CMakeFiles/lldb-vscode.dir/LLDBUtils.cpp.o CMakeFiles/lldb-vsco
de.dir/OutputRedirector.cpp.o CMakeFiles/lldb-vscode.dir/ProgressEvent.cpp.o CMakeFiles/lldb-vscode.dir/RunInTerminal.cpp.o CMakeFiles/lldb-vscode.dir/SourceBreakpoint.cpp.o CMakeFi
les/lldb-vscode.dir/VSCode.cpp.o -o ../../../../bin/lldb-vscode -Wl,-rpath,@loader_path/../lib ../../../../lib/liblldb.13.0.0.dylib -lpthread ../../../../lib/libclang-cpp.dylib ../
../../../lib/libLLVM.dylib
[100%] Built target lldb-vscode
/usr/local/Cellar/cmake/3.21.4/bin/cmake -E cmake_progress_start /tmp/llvm-20211109-12151-m0zvtm/llvm-project-13.0.0.src/llvm/build/CMakeFiles 0
Then run the install command:
$ cmake --build . --target install
The tail of the result should be:
...
-- Installing: /usr/local/Cellar/llvm/13.0.0_1/lib/cmake/llvm/./CheckAtomic.cmake
-- Installing: /usr/local/Cellar/llvm/13.0.0_1/lib/cmake/llvm/./FindSphinx.cmake
-- Installing: /usr/local/Cellar/llvm/13.0.0_1/lib/cmake/llvm/./FindGRPC.cmake
-- Installing: /usr/local/Cellar/llvm/13.0.0_1/lib/cmake/llvm/./TableGen.cmake
Execute the last command:
$ cmake --build . --target install-xcode-toolchain
The tail of the results should be:
...
-- Installing: /usr/local/Cellar/llvm/13.0.0_1/Toolchains/LLVM13.0.0.xctoolchain//usr/lib/cmake/llvm/./CheckAtomic.cmake
-- Installing: /usr/local/Cellar/llvm/13.0.0_1/Toolchains/LLVM13.0.0.xctoolchain//usr/lib/cmake/llvm/./FindSphinx.cmake
-- Installing: /usr/local/Cellar/llvm/13.0.0_1/Toolchains/LLVM13.0.0.xctoolchain//usr/lib/cmake/llvm/./FindGRPC.cmake
-- Installing: /usr/local/Cellar/llvm/13.0.0_1/Toolchains/LLVM13.0.0.xctoolchain//usr/lib/cmake/llvm/./TableGen.cmake
Built target install-xcode-toolchain
/usr/local/Cellar/cmake/3.21.4/bin/cmake -E cmake_progress_start /tmp/llvm-20211109-12151-m0zvtm/llvm-project-13.0.0.src/llvm/build/CMakeFiles 0
Then press control+d to return to debug menu. Because the two last commands were run manually, you need to ignore the rest of errors by choosing the option 2:
- raise
- ignore
- backtrace
- irb
- shell
Choose an action: 2
==> cmake --build . --target install
...
cmake
--build
.
--target
install
Error: could not load cache
BuildError: Failed executing: cmake --build . --target install
1. raise
2. ignore
3. backtrace
4. irb
5. shell
Choose an action: 2
==> cmake --build . --target install-xcode-toolchain
...
cmake
--build
.
--target
install-xcode-toolchain
Error: could not load cache
BuildError: Failed executing: cmake --build . --target install-xcode-toolchain
1. raise
2. ignore
3. backtrace
4. irb
5. shell
Choose an action: 2
It will continue to install to the rest:
==> Fixing /usr/local/Cellar/llvm/13.0.0_1/bin/FileCheck permissions from 755 to 555
==> Fixing /usr/local/Cellar/llvm/13.0.0_1/bin/analyze-build permissions from 755 to 555
...
==> Changing dylib ID of /usr/local/Cellar/llvm/13.0.0_1/lib/libunwind.1.0.dylib
from @rpath/libunwind.1.dylib
to /usr/local/opt/llvm/lib/libunwind.1.dylib
/usr/local/Homebrew/Library/Homebrew/brew.rb (Formulary::FromPathLoader): loading /usr/local/opt/llvm/.brew/llvm.rb
==> Caveats
To use the bundled libc++ please add the following LDFLAGS:
LDFLAGS="-L/usr/local/opt/llvm/lib -Wl,-rpath,/usr/local/opt/llvm/lib"
llvm is keg-only, which means it was not symlinked into /usr/local,
because macOS already provides this software and installing another version in
parallel can cause all kinds of trouble.
If you need to have llvm first in your PATH, run:
echo 'export PATH="/usr/local/opt/llvm/bin:$PATH"' >> ~/.zshrc
For compilers to find llvm you may need to set:
export LDFLAGS="-L/usr/local/opt/llvm/lib"
export CPPFLAGS="-I/usr/local/opt/llvm/include"
==> Summary
🍺 /usr/local/Cellar/llvm/13.0.0_1: 10,907 files, 1.8GB, built in 1418 minutes 39 seconds
It can be verified this way, the default llvm@10 pre-installed:
$ /usr/bin/clang --version
Apple LLVM version 10.0.0 (clang-1000.11.45.5)
Target: x86_64-apple-darwin17.7.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
And the new Homebrew version of llvm@13:
$ /usr/local/opt/llvm/bin/clang --version
Homebrew clang version 13.0.0
Target: x86_64-apple-darwin17.7.0
Thread model: posix
InstalledDir: /usr/local/opt/llvm/bin