CMake Error: install(EXPORT "boost_filesystem-targets" ...) includes target "boost_filesystem" which requires target "boost_atomic" that is not in any export set

[mloskot]

I'm using the Boost superproject from the current develop branch and running CMake (via build scripts from https://github.com/boostorg/boost-ci):

cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Debug -DBOOST_INCLUDE_LIBRARIES=gil -DBUILD_SHARED_LIBS=ON -DBUILD_TESTING=ON -DBoost_VERBOSE=ON ..

which fails this way:

-- The CXX compiler identification is GNU 10.3.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Boost: using system layout: include, bin, lib, lib/cmake
-- Boost: Debug build, shared libraries, MPI OFF, Python OFF, testing ON
-- Boost: libraries included: gil
-- Adding Boost dependency assert
-- Looking for C++ include pthread.h
-- Looking for C++ include pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Check if compiler accepts -pthread
-- Check if compiler accepts -pthread - yes
-- Found Threads: TRUE
-- Performing Test BOOST_ATOMIC_TARGET_X86
-- Performing Test BOOST_ATOMIC_TARGET_X86 - Success
-- Performing Test BOOST_ATOMIC_COMPILER_HAS_SSE2
-- Performing Test BOOST_ATOMIC_COMPILER_HAS_SSE2 - Success
-- Performing Test BOOST_ATOMIC_COMPILER_HAS_SSE41
-- Performing Test BOOST_ATOMIC_COMPILER_HAS_SSE41 - Success
-- Adding Boost dependency concept_check
-- Adding Boost dependency config
-- The C compiler identification is GNU 10.3.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Adding Boost dependency container_hash
-- Boost.Context: architecture x86_64, binary format elf, ABI sysv, assembler gas, suffix .S, implementation fcontext
-- The ASM compiler identification is GNU
-- Found assembler: /usr/bin/cc
-- Adding Boost dependency conversion
-- Adding Boost dependency core
-- Adding Boost dependency detail
-- Boost.Fiber: NUMA target OS is linux
-- Adding Boost dependency filesystem
-- Performing Test BOOST_FILESYSTEM_HAS_INIT_PRIORITY
-- Performing Test BOOST_FILESYSTEM_HAS_INIT_PRIORITY - Success
-- Performing Test BOOST_FILESYSTEM_HAS_CXX20_ATOMIC_REF
-- Performing Test BOOST_FILESYSTEM_HAS_CXX20_ATOMIC_REF - Failed
-- Performing Test BOOST_FILESYSTEM_HAS_STAT_ST_BLKSIZE
-- Performing Test BOOST_FILESYSTEM_HAS_STAT_ST_BLKSIZE - Success
-- Performing Test BOOST_FILESYSTEM_HAS_STAT_ST_MTIM
-- Performing Test BOOST_FILESYSTEM_HAS_STAT_ST_MTIM - Success
-- Performing Test BOOST_FILESYSTEM_HAS_STAT_ST_MTIMENSEC
-- Performing Test BOOST_FILESYSTEM_HAS_STAT_ST_MTIMENSEC - Failed
-- Performing Test BOOST_FILESYSTEM_HAS_STAT_ST_MTIMESPEC
-- Performing Test BOOST_FILESYSTEM_HAS_STAT_ST_MTIMESPEC - Failed
-- Performing Test BOOST_FILESYSTEM_HAS_STAT_ST_BIRTHTIMENSEC
-- Performing Test BOOST_FILESYSTEM_HAS_STAT_ST_BIRTHTIMENSEC - Failed
-- Performing Test BOOST_FILESYSTEM_HAS_STAT_ST_BIRTHTIMESPEC
-- Performing Test BOOST_FILESYSTEM_HAS_STAT_ST_BIRTHTIMESPEC - Failed
-- Performing Test BOOST_FILESYSTEM_HAS_STATX
-- Performing Test BOOST_FILESYSTEM_HAS_STATX - Success
-- Performing Test BOOST_FILESYSTEM_HAS_FDOPENDIR_NOFOLLOW
-- Performing Test BOOST_FILESYSTEM_HAS_FDOPENDIR_NOFOLLOW - Success
-- Adding Boost dependency function_types
-- Adding Boost dependency fusion
-- Adding Boost dependency integer
-- Adding Boost dependency io
-- Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found version "1.2.11")
-- Found LibLZMA: /usr/lib/x86_64-linux-gnu/liblzma.so (found version "5.2.5")
-- Performing Test BOOST_IOSTREAMS_HAS_LZMA_CPUTHREADS
-- Performing Test BOOST_IOSTREAMS_HAS_LZMA_CPUTHREADS - Success
-- Boost.Iostreams: ZLIB ON, BZip2 OFF, LZMA ON (multithreaded), Zstd OFF
-- Adding Boost dependency iterator
-- Performing Test Iconv_IS_BUILT_IN
-- Performing Test Iconv_IS_BUILT_IN - Success
-- Found Iconv: /usr/lib/x86_64-linux-gnu/libc.so
-- Boost.Locale: iconv ON, ICU OFF, POSIX ON, std ON, winapi OFF
-- Performing Test BOOST_LOG_TARGET_X86
-- Performing Test BOOST_LOG_TARGET_X86 - Success
-- Performing Test BOOST_LOG_HAS_LOCK_FREE_ATOMIC_INT32
-- Performing Test BOOST_LOG_HAS_LOCK_FREE_ATOMIC_INT32 - Failed
-- Performing Test BOOST_LOG_COMPILER_HAS_SSSE3
-- Performing Test BOOST_LOG_COMPILER_HAS_SSSE3 - Success
-- Performing Test BOOST_LOG_COMPILER_HAS_AVX2
-- Performing Test BOOST_LOG_COMPILER_HAS_AVX2 - Success
-- Performing Test BOOST_LOG_HAS_NATIVE_SYSLOG
-- Performing Test BOOST_LOG_HAS_NATIVE_SYSLOG - Success
-- Boost.Math: standalone mode OFF
-- Adding Boost dependency move
-- Adding Boost dependency mp11
-- Adding Boost dependency mpl
-- Boost.Multiprecision: standalone mode OFF
-- Performing Test BOOST_NOWIDE_HAS_LFS
-- Performing Test BOOST_NOWIDE_HAS_LFS - Success
-- Performing Test BOOST_NOWIDE_HAS_INIT_PRIORITY
-- Performing Test BOOST_NOWIDE_HAS_INIT_PRIORITY - Success
-- Adding Boost dependency optional
-- Adding Boost dependency predef
-- Adding Boost dependency preprocessor
-- Adding Boost dependency smart_ptr
-- Performing Test BOOST_STACKTRACE_HAS_BACKTRACE
-- Performing Test BOOST_STACKTRACE_HAS_BACKTRACE - Success
-- Performing Test BOOST_STACKTRACE_HAS_WINDBG
-- Performing Test BOOST_STACKTRACE_HAS_WINDBG - Failed
-- Performing Test BOOST_STACKTRACE_HAS_WINDBG_CACHED
-- Performing Test BOOST_STACKTRACE_HAS_WINDBG_CACHED - Failed
-- Boost.Stacktrace: noop ON, backtrace ON, addr2line ON, basic ON, windbg OFF, windbg_cached OFF
-- Adding Boost dependency static_assert
-- Adding Boost dependency system
-- Boost.Thread: threading API is pthread
-- Adding Boost dependency throw_exception
-- Adding Boost dependency tuple
-- Adding Boost dependency type_traits
-- Adding Boost dependency typeof
-- Adding Boost dependency utility
-- Adding Boost dependency variant2
-- Adding Boost dependency winapi
-- Configuring done
CMake Error: install(EXPORT "boost_filesystem-targets" ...) includes target "boost_filesystem" which requires target "boost_atomic" that is not in any export set.
-- Generating done
CMake Generate step failed.  Build files cannot be regenerated correctly.

It looks like some dependencies of Boost.Filesystem can not be resolved.

[Flamefire]

I think this line is the problem :

filesystem/CMakeLists.txt

Line 197 in 41d076a

target_link_libraries(boost_filesystem PRIVATE Boost::atomic)

The dependency scanner by @pdimov reads full lines only. So put the atomic lib in a new line, see the winapi lib below

I can also check if I can enhance the depency scanner to allow this Syntax. Bothered me a while already ;)

Btw: not fully sure how well conditional dependencies work with the generated config files (for consumers find_package)

[Lastique]

The CMake syntax in Boost.Filesystem is correct. If the dependency scanner does not recognize it then that is where the issue should be fixed, IMHO.

[Lastique]

I've created a Boost.CMake issue here: boostorg/cmake#17.