Compilation phase : error: ‘hash_value’ was not declared in this scope

[raphael10-collab]

raphy@raohy:~$ git clone --recurse-submodules https://github.com/boostorg/boost.git


raphy@raohy:~/boost$ cmake -B builddir
-- The CXX compiler identification is GNU 14.2.0
-- 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: Release build, static libraries, MPI OFF, Python OFF, testing OFF
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- 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
-- Performing Test BOOST_CHARCONV_QUADMATH_FOUND
-- Performing Test BOOST_CHARCONV_QUADMATH_FOUND - Success
-- Boost.Charconv: quadmath support ON
-- The C compiler identification is GNU 12.3.0
-- 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
-- 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
-- Boost.Fiber: NUMA target OS is linux
-- Performing Test BOOST_FILESYSTEM_HAS_INIT_PRIORITY
-- Performing Test BOOST_FILESYSTEM_HAS_INIT_PRIORITY - Success
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-- 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
-- Performing Test BOOST_FILESYSTEM_HAS_DIRENT_D_TYPE
-- Performing Test BOOST_FILESYSTEM_HAS_DIRENT_D_TYPE - Success
-- Performing Test BOOST_FILESYSTEM_HAS_POSIX_AT_APIS
-- Performing Test BOOST_FILESYSTEM_HAS_POSIX_AT_APIS - Success
-- Performing Test BOOST_FILESYSTEM_HAS_FALLOCATE
-- Performing Test BOOST_FILESYSTEM_HAS_FALLOCATE - Success
-- Found ZLIB: /usr/lib/x86_64-linux-gnu/libz.so (found version "1.3")
-- Found BZip2: /usr/lib/x86_64-linux-gnu/libbz2.so (found version "1.0.8")
-- Found LibLZMA: /usr/lib/x86_64-linux-gnu/liblzma.so (found version "5.4.5")
-- Performing Test BOOST_IOSTREAMS_HAS_LZMA_CPUTHREADS
-- Performing Test BOOST_IOSTREAMS_HAS_LZMA_CPUTHREADS - Success
-- Boost.Iostreams: ZLIB ON, BZip2 ON, LZMA ON (multithreaded), Zstd ON
-- Performing Test Iconv_IS_BUILT_IN
-- Performing Test Iconv_IS_BUILT_IN - Success
-- Found Iconv: built in to C library
-- Found the following ICU libraries:
--   data (required): /usr/local/lib/libicudata.so
--   i18n (required): /usr/local/lib/libicui18n.so
--   uc (required): /usr/local/lib/libicuuc.so
-- Found ICU: /usr/local/include (found version "72.1")
-- Boost.Locale: iconv ON, ICU ON, 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 - Success
-- Performing Test BOOST_LOG_COMPILER_HAS_SSSE3
-- Performing Test BOOST_LOG_COMPILER_HAS_SSSE3 - Success
-- Performing Test BOOST_LOG_COMPILER_HAS_AVX2
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-- Performing Test BOOST_LOG_HAS_NATIVE_SYSLOG
-- Performing Test BOOST_LOG_HAS_NATIVE_SYSLOG - Success
-- Boost.Math: standalone mode OFF
-- Boost.Multiprecision: standalone mode OFF
-- Found OpenSSL: /usr/lib/x86_64-linux-gnu/libcrypto.so (found version "3.0.13")
-- 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
-- Found the following ICU libraries:
--   data (required): /usr/local/lib/libicudata.so
--   i18n (required): /usr/local/lib/libicui18n.so
--   uc (required): /usr/local/lib/libicuuc.so
-- 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, from_exception ON
-- Boost.Thread: threading API is pthread
-- Configuring done (4.5s)
-- Generating done (0.2s)
-- Build files have been written to: /home/raphy/boost/builddir
raphy@raohy:~/boost$




raphy@raohy:~/boost$ cmake --build builddir/
[ 80%] Built target boost_type_erasure
[ 80%] Building CXX object libs/url/CMakeFiles/boost_url.dir/src/authority_view.cpp.o
In file included from /home/raphy/boost/libs/url/include/boost/url/pct_string_view.hpp:18,
                 from /home/raphy/boost/libs/url/include/boost/url/authority_view.hpp:17,
                 from /home/raphy/boost/libs/url/src/authority_view.cpp:12:
/home/raphy/boost/libs/url/include/boost/url/grammar/string_view_base.hpp: In function ‘std::size_t boost::urls::grammar::hash_value(const string_view_base&)’:
/home/raphy/boost/libs/url/include/boost/url/grammar/string_view_base.hpp:867:16: error: ‘hash_value’ was not declared in this scope
  867 |         return hash_value(s.s_);
      |                ^~~~~~~~~~
/home/raphy/boost/libs/url/include/boost/url/grammar/string_view_base.hpp:867:16: note: suggested alternatives:
In file included from /home/raphy/boost/libs/system/include/boost/system/error_code.hpp:13,
                 from /home/raphy/boost/libs/url/include/boost/url/error_types.hpp:14,
                 from /home/raphy/boost/libs/url/include/boost/url/error.hpp:14,
                 from /home/raphy/boost/libs/url/include/boost/url/ipv4_address.hpp:15,
                 from /home/raphy/boost/libs/url/include/boost/url/authority_view.hpp:15:
/home/raphy/boost/libs/system/include/boost/system/detail/error_code.hpp:618:20: note:   ‘boost::system::hash_value’
  618 | inline std::size_t hash_value( error_code const & ec )
      |                    ^~~~~~~~~~
In file included from /home/raphy/boost/libs/system/include/boost/system/result.hpp:12,
                 from /home/raphy/boost/libs/url/include/boost/url/error_types.hpp:16:
/home/raphy/boost/libs/variant2/include/boost/variant2/variant.hpp:2391:34: note:   ‘boost::variant2::hash_value’
 2391 | template<class... T> std::size_t hash_value( variant<T...> const & v )
      |                                  ^~~~~~~~~~
gmake[2]: *** [libs/url/CMakeFiles/boost_url.dir/build.make:76: libs/url/CMakeFiles/boost_url.dir/src/authority_view.cpp.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:3931: libs/url/CMakeFiles/boost_url.dir/all] Error 2
gmake: *** [Makefile:156: all] Error 2

OS: Ubuntu 24.04
gcc : 14.2.0

[owacoder]

Looks like #include <boost/container_hash/hash.hpp> inside string_view_base.hpp fixes the issue.

[pdimov]

Should be fixed.

[seektechnz]

Seems to be working fine now as mentioned in boostorg/url#892.