Seeing Hermes build failure on Sonoma 14.5, Xcode 15.4 (missing libatomic)

[douglowder]

Seeing this consistently on both my own local machine and in a CI environment, when building Hermes for React Native on Apple platforms.

• The problem reproduces with RN 0.75 and RN 0.76, but not RN 0.74.
• I was able to fix the issue by installing the new Xcode 16 RC and its command line tools, so this is likely a problem in the Apple development environment.

Posting this here in case anyone else hits this problem.

Building hermesc
CMake Deprecation Warning at CMakeLists.txt:42 (cmake_policy):
  The OLD behavior for policy CMP0026 will be removed from a future version
  of CMake.

  The cmake-policies(7) manual explains that the OLD behaviors of all
  policies are deprecated and that a policy should be set to OLD only under
  specific short-term circumstances.  Projects should be ported to the NEW
  behavior and not rely on setting a policy to OLD.
-- The C compiler identification is AppleClang 15.0.0.15000309
-- The CXX compiler identification is AppleClang 15.0.0.15000309
-- 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
-- Performing Test CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG
-- Performing Test CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG - Success
-- Performing Test DEPRECATED_COPY_FLAG
-- Performing Test DEPRECATED_COPY_FLAG - Success
-- Performing Test CXX_SUPPORTS_CLASS_MEMACCESS_FLAG
-- Performing Test CXX_SUPPORTS_CLASS_MEMACCESS_FLAG - Failed
-- Performing Test CXX_SUPPORTS_NOEXCEPT_TYPE_FLAG
-- Performing Test CXX_SUPPORTS_NOEXCEPT_TYPE_FLAG - Success
-- Performing Test CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR
-- Performing Test CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR - Success
-- Performing Test C_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG
-- Performing Test C_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG - Failed
-- Performing Test CXX_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG
-- Performing Test CXX_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG - Failed
-- Performing Test C_SUPPORTS_FP_CONTRACT_FLAG
-- Performing Test C_SUPPORTS_FP_CONTRACT_FLAG - Failed
-- Performing Test CXX_SUPPORTS_FP_CONTRACT_FLAG
-- Performing Test CXX_SUPPORTS_FP_CONTRACT_FLAG - Failed
-- Performing Test RANGE_ANALYSIS_FLAG
-- Performing Test RANGE_ANALYSIS_FLAG - Success
-- Found Python: /opt/homebrew/Frameworks/Python.framework/Versions/3.12/bin/python3.12 (found version "3.12.3") found components: Interpreter
-- Performing Test HAVE_COMPUTED_GOTO
-- Performing Test HAVE_COMPUTED_GOTO - Success
-- Performing Test HAVE_GC_SECTIONS
-- Performing Test HAVE_GC_SECTIONS - Failed
-- Performing Test HAVE_DEAD_STRIP
-- Performing Test HAVE_DEAD_STRIP - Success
-- Performing Test HAVE_ICF
-- Performing Test HAVE_ICF - Failed
-- Performing Test CXX_SUPPORTS_SHORTEN_64_TO_32
-- Performing Test CXX_SUPPORTS_SHORTEN_64_TO_32 - Success
-- Looking for dlfcn.h
-- Looking for dlfcn.h - found
-- Looking for errno.h
-- Looking for errno.h - found
-- Looking for fcntl.h
-- Looking for fcntl.h - found
-- Looking for link.h
-- Looking for link.h - not found
-- Looking for malloc.h
-- Looking for malloc.h - not found
-- Looking for malloc/malloc.h
-- Looking for malloc/malloc.h - found
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for signal.h
-- Looking for signal.h - found
-- Looking for sys/ioctl.h
-- Looking for sys/ioctl.h - found
-- Looking for sys/mman.h
-- Looking for sys/mman.h - found
-- Looking for sys/param.h
-- Looking for sys/param.h - not found
-- Looking for sys/resource.h
-- Looking for sys/resource.h - found
-- Looking for sys/stat.h
-- Looking for sys/stat.h - found
-- Looking for sys/time.h
-- Looking for sys/time.h - not found
-- Looking for sys/types.h
-- Looking for sys/types.h - not found
-- Looking for termios.h
-- Looking for termios.h - found
-- Looking for unistd.h
-- Looking for unistd.h - not found
-- Looking for valgrind/valgrind.h
-- Looking for valgrind/valgrind.h - not found
-- Looking for zlib.h
-- Looking for zlib.h - not found
-- Looking for fenv.h
-- Looking for fenv.h - found
-- Looking for FE_ALL_EXCEPT
-- Looking for FE_ALL_EXCEPT - found
-- Looking for FE_INEXACT
-- Looking for FE_INEXACT - found
-- Looking for mach/mach.h
-- Looking for mach/mach.h - found
-- Looking for histedit.h
-- Looking for histedit.h - not found
-- Looking for CrashReporterClient.h
-- Looking for CrashReporterClient.h - not found
-- Performing Test HAVE_CRASHREPORTER_INFO
-- Performing Test HAVE_CRASHREPORTER_INFO - Success
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Looking for pthread_getspecific in pthread
-- Looking for pthread_getspecific in pthread - found
-- Looking for pthread_rwlock_init in pthread
-- Looking for pthread_rwlock_init in pthread - found
-- Looking for pthread_mutex_lock in pthread
-- Looking for pthread_mutex_lock in pthread - found
-- Looking for dlopen in dl
-- Looking for dlopen in dl - found
-- Looking for clock_gettime in rt
-- Looking for clock_gettime in rt - not found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Looking for xar_open in xar
-- Looking for xar_open in xar - not found
-- Looking for arc4random
-- Looking for arc4random - found
-- Looking for backtrace
-- Looking for backtrace - not found
-- Could NOT find Backtrace (missing: Backtrace_LIBRARY)
-- Performing Test C_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW
-- Performing Test C_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW - Success
-- Looking for _Unwind_Backtrace
-- Looking for _Unwind_Backtrace - found
-- Looking for getpagesize
-- Looking for getpagesize - not found
-- Looking for sysconf
-- Looking for sysconf - not found
-- Looking for getrusage
-- Looking for getrusage - found
-- Looking for setrlimit
-- Looking for setrlimit - found
-- Looking for isatty
-- Looking for isatty - not found
-- Looking for futimens
-- Looking for futimens - not found
-- Looking for futimes
-- Looking for futimes - not found
-- Looking for posix_fallocate
-- Looking for posix_fallocate - not found
-- Looking for lseek64
-- Looking for lseek64 - not found
-- Looking for mallctl
-- Looking for mallctl - not found
-- Looking for mallinfo
-- Looking for mallinfo - not found
-- Looking for malloc_zone_statistics
-- Looking for malloc_zone_statistics - found
-- Looking for getrlimit
-- Looking for getrlimit - not found
-- Looking for posix_spawn
-- Looking for posix_spawn - not found
-- Looking for pread
-- Looking for pread - not found
-- Looking for realpath
-- Looking for realpath - found
-- Looking for sbrk
-- Looking for sbrk - not found
-- Looking for strerror
-- Looking for strerror - found
-- Looking for strerror_r
-- Looking for strerror_r - found
-- Looking for strerror_s
-- Looking for strerror_s - not found
-- Looking for setenv
-- Looking for setenv - found
-- Looking for dlopen
-- Looking for dlopen - found
-- Looking for dladdr
-- Looking for dladdr - found
-- Looking for __GLIBC__
-- Looking for __GLIBC__ - not found
-- Looking for sched_getaffinity
-- Looking for sched_getaffinity - not found
-- Looking for CPU_COUNT
-- Looking for CPU_COUNT - not found
-- Looking for pthread_getname_np
-- Looking for pthread_getname_np - not found
-- Looking for pthread_setname_np
-- Looking for pthread_setname_np - not found
-- Performing Test HAVE_CXX_ATOMICS_WITHOUT_LIB
-- Performing Test HAVE_CXX_ATOMICS_WITHOUT_LIB - Failed
-- Looking for __atomic_fetch_add_4 in atomic
-- Looking for __atomic_fetch_add_4 in atomic - not found
-- Configuring incomplete, errors occurred!
CMake Error at external/llvh/cmake/modules/CheckAtomic.cmake:53 (message):
  Host compiler appears to require libatomic, but cannot find it.
Call Stack (most recent call first):
  external/llvh/cmake/config-ix.cmake:323 (include)
  external/llvh/CMakeLists.txt:21 (include)

[tmikov]

Interesting. I have no trouble building Hermes on my system with Sonoma and XCode 15.1. So, the problem must have been introduced after.

This is what seems to be failing in your case:

  CHECK_CXX_SOURCE_COMPILES("
#include <atomic>
std::atomic<int> x;
int main() {
  return x;
}
" HAVE_CXX_ATOMICS_WITHOUT_LIB)

This should just compile without any additional libraries: c++ test.cpp. Is it easy for you to try compiling this small test file manually from the CLI, so we can see the exact error?

BTW, I see other unexpected failures in your trace. All of these pass on my system. So, something is seriously wrong:

-- Performing Test C_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG
-- Performing Test C_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG - Failed
-- Performing Test CXX_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG
-- Performing Test CXX_SUPPORTS_DELETE_NON_VIRTUAL_DTOR_FLAG - Failed
-- Performing Test C_SUPPORTS_FP_CONTRACT_FLAG
-- Performing Test C_SUPPORTS_FP_CONTRACT_FLAG - Failed
-- Performing Test CXX_SUPPORTS_FP_CONTRACT_FLAG
-- Performing Test CXX_SUPPORTS_FP_CONTRACT_FLAG - Failed

[douglowder]

I've already moved to XCode 16 so I no longer see the issues locally -- however, I can try your test in our CI environment (still on Xcode 15.4) and see if it breaks!

[douglowder]

That C++ program compiles fine in the CI environment, so there must be something else going on. Possibly there is something in our Hermes build flow that is breaking the C++ include or library paths, or there is some issue with cmake interacting with Xcode 15.4. Glad that Xcode 16 fixes it.

[kisg]

I just ran into this issue with a recent Hermes V1 build and Xcode 26.1.1

The issue was that I had both XROS_DEPLOYMENT_TARGET and IOS_DEPLOYMENT_TARGET environment variables set in the terminal, because I had previously been building for those platforms. If you run into this issue, make sure to unset these variables and try again.