[llvm-bugs] [Bug 34376] New: Trying to find __atomic_fetch_add_4 fails on MacOSX

via llvm-bugs llvm-bugs at lists.llvm.org
Wed Aug 30 04:38:36 PDT 2017 

https://bugs.llvm.org/show_bug.cgi?id=34376

            Bug ID: 34376
           Summary: Trying to find __atomic_fetch_add_4 fails on MacOSX
           Product: Build scripts
           Version: trunk
          Hardware: Macintosh
                OS: MacOS X
            Status: NEW
          Severity: release blocker
          Priority: P
         Component: cmake
          Assignee: unassignedbugs at nondot.org
          Reporter: gonzalobg88 at gmail.com
                CC: llvm-bugs at lists.llvm.org

Configuring fails on MacOS X using AppleClang. CMake fails trying to link
-latomic (does this even make sense on MacOS?).

The output of CMake and CMakeError.log follows:

-- The C compiler identification is AppleClang 8.1.0.8020042
-- The CXX compiler identification is AppleClang 8.1.0.8020042
-- The ASM compiler identification is AppleClang
-- Found assembler:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
-- Check for working C compiler:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
-- Check for working C compiler:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
-- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++
-- Check for working CXX compiler:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++
-- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found libtool -
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool
-- Looking for dirent.h
-- Looking for dirent.h - found
-- 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 inttypes.h
-- Looking for inttypes.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 ndir.h
-- Looking for ndir.h - not found
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for signal.h
-- Looking for signal.h - found
-- Looking for stdint.h
-- Looking for stdint.h - found
-- Looking for sys/dir.h
-- Looking for sys/dir.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/ndir.h
-- Looking for sys/ndir.h - not found
-- Looking for sys/param.h
-- Looking for sys/param.h - 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 - found
-- Looking for sys/types.h
-- Looking for sys/types.h - found
-- Looking for sys/uio.h
-- Looking for sys/uio.h - found
-- Looking for termios.h
-- Looking for termios.h - found
-- Looking for unistd.h
-- Looking for unistd.h - found
-- Looking for valgrind/valgrind.h
-- Looking for valgrind/valgrind.h - found
-- Looking for zlib.h
-- Looking for zlib.h - 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 - 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
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for pthread_create
-- Looking for pthread_create - found
-- Found Threads: TRUE  
-- Looking for compress2 in z
-- Looking for compress2 in z - found
-- Looking for el_init in edit
-- Looking for el_init in edit - found
-- Looking for setupterm in tinfo
-- Looking for setupterm in tinfo - not found
-- Looking for setupterm in terminfo
-- Looking for setupterm in terminfo - not found
-- Looking for setupterm in curses
-- Looking for setupterm in curses - found
-- Looking for xar_open in xar
-- Looking for xar_open in xar - found
-- Looking for arc4random
-- Looking for arc4random - found
-- Looking for backtrace
-- Looking for backtrace - found
-- backtrace facility detected in default set of libraries
-- Found Backtrace:
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include 
-- Performing Test C_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW
-- Performing Test C_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW - Failed
-- Looking for _Unwind_Backtrace
-- Looking for _Unwind_Backtrace - found
-- Looking for getpagesize
-- Looking for getpagesize - found
-- Looking for sysconf
-- Looking for sysconf - found
-- Looking for getrusage
-- Looking for getrusage - found
-- Looking for setrlimit
-- Looking for setrlimit - found
-- Looking for isatty
-- Looking for isatty - found
-- Looking for futimens
-- Looking for futimens - not found
-- Looking for futimes
-- Looking for futimes - found
-- Looking for posix_fallocate
-- Looking for posix_fallocate - not found
-- Looking for writev
-- Looking for writev - 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 mkdtemp
-- Looking for mkdtemp - found
-- Looking for mkstemp
-- Looking for mkstemp - found
-- Looking for mktemp
-- Looking for mktemp - found
-- Looking for getcwd
-- Looking for getcwd - found
-- Looking for gettimeofday
-- Looking for gettimeofday - found
-- Looking for getrlimit
-- Looking for getrlimit - found
-- Looking for posix_spawn
-- Looking for posix_spawn - found
-- Looking for pread
-- Looking for pread - found
-- Looking for realpath
-- Looking for realpath - found
-- Looking for sbrk
-- Looking for sbrk - found
-- Looking for strtoll
-- Looking for strtoll - 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 pthread_getname_np in pthread
-- Looking for pthread_getname_np in pthread - found
-- Looking for pthread_setname_np in pthread
-- Looking for pthread_setname_np in pthread - found
-- Performing Test HAVE_INT64_T
-- Performing Test HAVE_INT64_T - Success
-- Performing Test HAVE_UINT64_T
-- Performing Test HAVE_UINT64_T - Success
-- Performing Test HAVE_U_INT64_T
-- Performing Test HAVE_U_INT64_T - Success
-- 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
CMake Error at cmake/modules/CheckAtomic.cmake:52 (message):
  Host compiler appears to require libatomic, but cannot find it.
Call Stack (most recent call first):
  cmake/config-ix.cmake:347 (include)
  CMakeLists.txt:577 (include)


-- Configuring incomplete, errors occurred!
See also "/tmp/build/llvm/CMakeFiles/CMakeOutput.log".
See also "/tmp/build/llvm/CMakeFiles/CMakeError.log"

Here is the CMakeError.log:

ource file was:

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

Determining if the function __atomic_fetch_add_4 exists in the atomic failed
with the following output:
Change Dir: /tmp/build/llvm/CMakeFiles/CMakeTmp

Run Build Command:"/usr/bin/make" "cmTC_dae66/fast"
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f
CMakeFiles/cmTC_dae66.dir/build.make CMakeFiles/cmTC_dae66.dir/build
Building C object CMakeFiles/cmTC_dae66.dir/CheckFunctionExists.c.o
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
  -isystem
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include
-isystem
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/4.2.1/
-isystem /usr/local/include -arch x86_64
-DCHECK_FUNCTION_EXISTS=__atomic_fetch_add_4 -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk
  -o CMakeFiles/cmTC_dae66.dir/CheckFunctionExists.c.o   -c
/usr/local/Cellar/cmake/3.9.0/share/cmake/Modules/CheckFunctionExists.c
Linking C executable cmTC_dae66
/usr/local/Cellar/cmake/3.9.0/bin/cmake -E cmake_link_script
CMakeFiles/cmTC_dae66.dir/link.txt --verbose=1
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
-isystem
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include
-isystem
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/4.2.1/
-isystem /usr/local/include -arch x86_64
-DCHECK_FUNCTION_EXISTS=__atomic_fetch_add_4 -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk
-Wl,-search_paths_first -Wl,-headerpad_max_install_names
-L/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib
-L/usr/local/lib -arch x86_64 
CMakeFiles/cmTC_dae66.dir/CheckFunctionExists.c.o  -o cmTC_dae66 -latomic -lm 
ld: library not found for -latomic
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[1]: *** [cmTC_dae66] Error 1
make: *** [cmTC_dae66/fast] Error 2

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