Failed to configure in BigSur (m1)

[sangwoo-joh]

Describe the bug
It failed to ./configure in Big Sur with M1 chip.
I've installed llvm via brew install llvm, and Xcode is fully installed too.

./configure
Running cmake:
"cmake" "." -DCMAKE_EXPORT_COMPILE_COMMANDS=1

-- 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: /Library/Developer/CommandLineTools/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: /Library/Developer/CommandLineTools/usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- llvm-config executable found: /opt/homebrew/opt/llvm/bin/llvm-config
-- Using Clang version 12.0.1 from /opt/homebrew/Cellar/llvm/12.0.1/lib with CXXFLAGS -I/opt/homebrew/Cellar/llvm/12.0.1/include -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-- Found LibClang: /opt/homebrew/Cellar/llvm/12.0.1/lib/libclang.dylib  
-- Performing Test LIBCLANG_COMPILES
-- Performing Test LIBCLANG_COMPILES - Success
-- Performing Test CXX_11_EXTENDED_REGEX_SUPPORT
-- Performing Test CXX_11_EXTENDED_REGEX_SUPPORT - Success
-- Found PkgConfig: /opt/homebrew/bin/pkg-config (found version "0.29.2") 
-- Looking for backtrace
-- Looking for backtrace - found
-- Looking for CLOCK_MONOTONIC_RAW
-- Looking for CLOCK_MONOTONIC_RAW - found
-- Looking for CLOCK_MONOTONIC
-- Looking for CLOCK_MONOTONIC - found
-- Looking for mach_absolute_time
-- Looking for mach_absolute_time - found
-- Looking for inotify_init
-- Looking for inotify_init - not found
-- Looking for kqueue
-- Looking for kqueue - found
-- Looking for epoll_wait
-- Looking for epoll_wait - not found
-- Looking for select
-- Looking for select - found
-- Looking for FD_CLOEXEC
-- Looking for FD_CLOEXEC - found
-- Looking for SO_NOSIGPIPE
-- Looking for SO_NOSIGPIPE - found
-- Looking for MSG_NOSIGNAL
-- Looking for MSG_NOSIGNAL - found
-- Looking for GetLogicalProcessorInformation
-- Looking for GetLogicalProcessorInformation - not found
-- Looking for SCHED_IDLE
-- Looking for SCHED_IDLE - not found
-- Looking for SHM_DEST
-- Looking for SHM_DEST - not found
OS X version 11.5.2
-- Using FSEvents
-- Performing Test HAVE_STATMTIM
-- Performing Test HAVE_STATMTIM - Failed
-- Found ZLIB: /Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/lib/libz.tbd (found version "1.2.11") 
-- Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the system variable OPENSSL_ROOT_DIR (missing: OPENSSL_CRYPTO_LIBRARY OPENSSL_INCLUDE_DIR) 
-- Checking for one of the modules 'openssl'
OPENSSL Can't be found. Rct configured without openssl support
-- Performing Test HAVE_CXX11
-- Performing Test HAVE_CXX11 - Failed
CMake Error at src/rct/rct.cmake:262 (message):
  C++11 support not detected.  rct requires a modern compiler, GCC >= 4.8 or
  Clang >= 3.2 should suffice
Call Stack (most recent call first):
  src/CMakeLists.txt:144 (include)


-- Configuring incomplete, errors occurred!
See also "/Users/sangwoo-joh/.dotfiles/rtags/CMakeFiles/CMakeOutput.log".
See also "/Users/sangwoo-joh/.dotfiles/rtags/CMakeFiles/CMakeError.log".

It seems rct.cmake does not recognize the installed clang. However,

❯ clang --version
Homebrew clang version 12.0.1
Target: arm64-apple-darwin20.6.0
Thread model: posix
InstalledDir: /opt/homebrew/opt/llvm/bin

I wonder what I'm missing!

Environment (please complete the following information):

• OS/Version: macOS Big Sur (11.5.2) (with Apple M1 Chip)
• Emacs: emacs-plus@28 --with-native-comp
• LLVM/Clang: check the following:

> brew info llvm
llvm: stable 12.0.1 (bottled), HEAD [keg-only]
Next-gen compiler infrastructure
https://llvm.org/
/opt/homebrew/Cellar/llvm/12.0.1 (9,803 files, 1.5GB)
  Poured from bottle on 2021-09-09 at 11:59:12
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/llvm.rb
License: Apache-2.0 with LLVM-exception
==> Dependencies
Build: cmake ✔, swig ✘
Required: [email protected] ✔
==> Options
--HEAD
	Install HEAD version
==> Caveats
To use the bundled libc++ please add the following LDFLAGS:
  LDFLAGS="-L/opt/homebrew/opt/llvm/lib -Wl,-rpath,/opt/homebrew/opt/llvm/lib"

llvm is keg-only, which means it was not symlinked into /opt/homebrew,
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="/opt/homebrew/opt/llvm/bin:$PATH"' >> ~/.zshrc

For compilers to find llvm you may need to set:
  export LDFLAGS="-L/opt/homebrew/opt/llvm/lib"
  export CPPFLAGS="-I/opt/homebrew/opt/llvm/include"

==> Analytics
install: 17,205 (30 days), 61,440 (90 days), 261,611 (365 days)
install-on-request: 11,864 (30 days), 41,121 (90 days), 198,778 (365 days)
build-error: 0 (30 days)

[jhanssen]

I believe this should be fixed with cdff9b4.

[sangwoo-joh]

@jhanssen ,
Thanks for your update.
However, it seems like this was not fixed by that commit. My cmake version is below:

❯ cmake --version
cmake version 3.21.2

CMake suite maintained and supported by Kitware (kitware.com/cmake).

[jhanssen]

I just tried a clean checkout and it seems to work for me. Could you try a clean checkout, alternatively run git clean -xfd . in the source tree and try again?

[sangwoo-joh]

@jhanssen Thanks for your update, and thanks for the useful git clean command (I had used git checkout ...)
But it still has the same issue. HAVE_CXX11 Failed.

[sangwoo-joh]

@jhanssen
After I've switched to v2.38 tag, it did succeed to ./configure, but it seems like the build is now the problem.
I will make another issue for this.
Thanks for your help!