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[Build] Error building ArrayFire with fmt 11.2.0 #3692

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[Build] Error building ArrayFire with fmt 11.2.0#3692
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@nots1dd
nots1dd
opened on Aug 28, 2025

Note

This is similar to #3596 in nature.

Description

ArrayFire is failing to compile with fmt 11.2.0 (in ArrayFireTypesIO.hpp).

It seems to be a mismatch between ArrayFire’s custom fmt::formatter specialization and the version of fmt on arch (which is 11)

Something to note as well, if I just add const to the format functions I will get this error:

[ 1%] Building CXX object third_party/arrayfire/src/backend/cpu/CMakeFiles/afcpu.dir/ __/common/DependencyModule.cpp.o 
In file included from /home/s1dd/dev/rcai/cppgrad/third_party/arrayfire/src/backend/co mmon/DependencyModule.cpp:10: 
/home/s1dd/dev/rcai/cppgrad/third_party/arrayfire/src/backend/common/ArrayFireTypesIO. hpp: 
In member function ‘decltype (ctx.out()) fmt::v11::formatter<arrayfire::common::V ersion>::format(const arrayfire::common::Version&, FormatContext&) const’: 
/home/s1dd/dev/rcai/cppgrad/third_party/arrayfire/src/backend/common/ArrayFireTypesIO. hpp:80:43: 
error: assignment of member ‘fmt::v11::formatter<arrayfire::common::Version >::show_minor’ in read-only object [-Wtemplate-body] 80 | if (ver.minor() == -1) show_minor = false; | ~~~~~~~~~~~^~~~~~~ 
/home/s1dd/dev/rcai/cppgrad/third_party/arrayfire/src/backend/common/ArrayFireTypesIO. hpp:81:43: 
error: assignment of member ‘fmt::v11::formatter<arrayfire::common::Version >::show_patch’ in read-only object [-Wtemplate-body] 81 | if (ver.patch() == -1) show_patch = false; | ~~~~~~~~~~~^~~~~~~ 
At global scope: 
cc1plus: note: unrecognized command-line option ‘-Wno-unqualified-std-cast-call’ may h ave been intended to silence earlier diagnostics

There is a fix I have in mind to have it work for older (9<) and newer fmt versions (like 11).

Error Log

In file included from /usr/include/fmt/format.h:41,
                 from /usr/include/fmt/chrono.h:23,
                 from /usr/include/fmt/ostream.h:23,
                 from /usr/include/spdlog/fmt/ostr.h:21,
                 from /home/s1dd/dev/rcai/cppgrad/third_party/arrayfire/src/backend/co
mmon/ArrayFireTypesIO.hpp:12,
                 from /home/s1dd/dev/rcai/cppgrad/third_party/arrayfire/src/backend/co
mmon/DependencyModule.cpp:10:
/usr/include/fmt/base.h: In instantiation of ‘static void fmt::v11::detail::value<Cont
ext>::format_custom(void*, fmt::v11::parse_context<typename Context::char_type>&, Cont
ext&) [with T = arrayfire::common::Version; Formatter = fmt::v11::formatter<arrayfire:
:common::Version>; Context = fmt::v11::context; typename Context::char_type = char]’:
/usr/include/fmt/base.h:2255:19:   required from ‘constexpr fmt::v11::detail::value<Co
ntext>::value(T&, fmt::v11::detail::custom_tag) [with T = arrayfire::common::Version; 
typename std::enable_if<has_formatter<T, typename Context::char_type>(), int>::type <a
nonymous> = 0; Context = fmt::v11::context]’
 2255 |     custom.format = format_custom<value_type, formatter<value_type, char_type>
>;
      |     ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~
/usr/include/fmt/base.h:2235:65:   required from ‘fmt::v11::detail::value<Context>::va
lue(T&) [with T = arrayfire::common::Version; typename std::enable_if<(std::integral_c
onstant<bool, (((((((std::is_class<T>::value || std::is_enum<T>::value) || std::is_uni
on<T>::value) || std::is_array<T>::value) && (! fmt::v11::detail::has_to_string_view<T
, void>::value)) && (! fmt::v11::detail::is_named_arg<T>::value)) && (! fmt::v11::deta
il::use_format_as<T>::value)) && (! fmt::v11::detail::use_format_as_member<typename st
d::remove_const<T>::type, std::integral_constant<bool, true> >::value))>::value || (!1
)), int>::type <anonymous> = 0; Context = fmt::v11::context]’
 2235 |   FMT_CONSTEXPR20 FMT_INLINE value(T& x) : value(x, custom_tag()) {}
      |                                                                 ^
/usr/include/fmt/base.h:2808:20:   required from ‘constexpr fmt::v11::detail::format_a
rg_store<Context, NUM_ARGS, NUM_NAMED_ARGS, DESC> fmt::v11::make_format_args(T& ...) [
with Context = context; T = {std::__cxx11::basic_string<char, std::char_traits<char>, 
std::allocator<char> >, arrayfire::common::Version}; int NUM_ARGS = 2; int NUM_NAMED_A
RGS = 0; long long unsigned int DESC = 253]’
 2808 |   return {{args...}};
      |                    ^
/usr/include/spdlog/logger.h:328:75:   required from ‘void spdlog::logger::log_(spdlog
::source_loc, spdlog::level::level_enum, spdlog::string_view_t, Args&& ...) [with Args
 = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, 
arrayfire::common::Version&}; spdlog::string_view_t = fmt::v11::basic_string_view<char
>]’
  328 |     fmt::vformat_to(fmt::appender(buf), fmt, fmt::make_format_args(args...));
      |                                              ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
/usr/include/spdlog/logger.h:80:13:   required from ‘void spdlog::logger::log(spdlog::
source_loc, spdlog::level::level_enum, fmt::v11::format_string<T ...>, Args&& ...) [wi
th Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<cha
r> >&, arrayfire::common::Version&}; fmt::v11::format_string<T ...> = fmt::v11::fstrin
g<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, ar
rayfire::common::Version&>]’
   80 |         log_(loc, lvl, details::to_string_view(fmt), std::forward<Args>(args).
..);
      |         ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~
/usr/include/spdlog/logger.h:85:12:   required from ‘void spdlog::logger::log(spdlog::
level::level_enum, fmt::v11::format_string<T ...>, Args&& ...) [with Args = {std::__cx
x11::basic_string<char, std::char_traits<char>, std::allocator<char> >&, arrayfire::co
mmon::Version&}; fmt::v11::format_string<T ...> = fmt::v11::fstring<std::__cxx11::basi
c_string<char, std::char_traits<char>, std::allocator<char> >&, arrayfire::common::Ver
sion&>]’
   85 |         log(source_loc{}, lvl, fmt, std::forward<Args>(args)...);
      |         ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/spdlog/logger.h:130:12:   required from ‘void spdlog::logger::trace(fmt::
v11::format_string<T ...>, Args&& ...) [with Args = {std::__cxx11::basic_string<char, 
std::char_traits<char>, std::allocator<char> >&, arrayfire::common::Version&}; fmt::v1
1::format_string<T ...> = fmt::v11::fstring<std::__cxx11::basic_string<char, std::char
_traits<char>, std::allocator<char> >&, arrayfire::common::Version&>]’
  130 |         log(level::trace, fmt, std::forward<Args>(args)...);
      |         ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/s1dd/dev/rcai/cppgrad/third_party/arrayfire/src/backend/common/DependencyModule.
cpp:137:33:   required from here
   67 |     getLogger()->trace("[ " __FILE__ \
      |     ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
   68 |                        ":" AF_STR_HELPER(__LINE__) " ] " __VA_ARGS__)
      |                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/fmt/base.h:2275:29: error: passing ‘const fmt::v11::formatter<arrayfire::
common::Version>’ as ‘this’ argument discards qualifiers [-fpermissive]
 2275 |     ctx.advance_to(cf.format(*static_cast<qualified_type*>(arg), ctx));
      |                    ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/s1dd/dev/rcai/cppgrad/third_party/arrayfire/src/backend/common/ArrayFireTypesIO.
hpp:76:10: note:   in call to ‘decltype (ctx.out()) fmt::v11::formatter<arrayfire::com
mon::Version>::format(const arrayfire::common::Version&, FormatContext&) [with FormatC
ontext = fmt::v11::context; decltype (ctx.out()) = fmt::v11::basic_appender<char>]’
   76 |     auto format(const arrayfire::common::Version& ver, FormatContext& ctx)
      |          ^~~~~~
cc1plus: note: unrecognized command-line option ‘-Wno-unqualified-std-cast-call’ may h
ave been intended to silence earlier diagnostics
make[2]: *** [third_party/arrayfire/src/backend/cpu/CMakeFiles/afcpu.dir/build.make:39
29: third_party/arrayfire/src/backend/cpu/CMakeFiles/afcpu.dir/__/common/DependencyMod
ule.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:2791: third_party/arrayfire/src/backend/cpu/CMakeFi
les/afcpu.dir/all] Error 2
make: *** [Makefile:166: all] Error 2

Build Environment

Compiler version: gcc version 15.2.1 20250813 (GCC)
Operating system: Arch Linux (kernel: 6.16.1-zen1-1-zen)
Build environment: fmt 11.2.0, ArrayFire at commit hash (a699cb9)
CMake variables:

AF_BACKEND:STRING=cpu
AF_BUILD_CPU:BOOL=ON
AF_BUILD_CUDA:BOOL=OFF
AF_BUILD_DOCS:BOOL=ON
AF_BUILD_EXAMPLES:BOOL=ON
AF_BUILD_FORGE:BOOL=OFF
AF_BUILD_ONEAPI:BOOL=OFF
AF_BUILD_OPENCL:BOOL=OFF
AF_BUILD_UNIFIED:BOOL=ON
AF_COMPUTE_LIBRARY:STRING=FFTW/LAPACK/BLAS
AF_CTEST_SEPARATED:BOOL=OFF
AF_SKIP_UNSUPPORTED_TESTS:BOOL=OFF
AF_STACKTRACE_TYPE:STRING=Basic
AF_WITH_CUDNN:BOOL=OFF
AF_WITH_EXTERNAL_PACKAGES_ONLY:BOOL=OFF
AF_WITH_FAST_MATH:BOOL=OFF
AF_WITH_FMT_HEADER_ONLY:BOOL=OFF
AF_WITH_SPDLOG_HEADER_ONLY:BOOL=OFF
AF_WITH_STATIC_CUDA_NUMERIC_LIBS:BOOL=OFF
BENCHMARK_BUILD_32_BITS:BOOL=OFF
BENCHMARK_DOWNLOAD_DEPENDENCIES:BOOL=OFF
BENCHMARK_ENABLE_ASSEMBLY_TESTS:BOOL=ON
BENCHMARK_ENABLE_DOXYGEN:BOOL=OFF
BENCHMARK_ENABLE_EXCEPTIONS:BOOL=ON
BENCHMARK_ENABLE_GTEST_TESTS:BOOL=ON
BENCHMARK_ENABLE_LIBPFM:BOOL=OFF
BENCHMARK_ENABLE_LTO:BOOL=OFF
BENCHMARK_ENABLE_WERROR:BOOL=ON
BENCHMARK_FORCE_WERROR:BOOL=OFF
BENCHMARK_INSTALL_DOCS:BOOL=ON
BENCHMARK_USE_BUNDLED_GTEST:BOOL=ON
BENCHMARK_USE_LIBCXX:BOOL=OFF
BUILD_TESTING:BOOL=ON
CATCH_DEVELOPMENT_BUILD:BOOL=OFF
CATCH_ENABLE_REPRODUCIBLE_BUILD:BOOL=ON
CATCH_INSTALL_DOCS:BOOL=ON
CATCH_INSTALL_EXTRAS:BOOL=ON
CLBlast_DIR:PATH=CLBlast_DIR-NOTFOUND
CMAKE_BUILD_TYPE:STRING=Release
CMAKE_INSTALL_PREFIX:PATH=/usr/local
CXXFEATURECHECK_DEBUG:BOOL=OFF
FETCHCONTENT_UPDATES_DISCONNECTED_SPAN-LITE:BOOL=OFF
GTest_DIR:PATH=/lib/cmake/GTest
LLVM_FILECHECK_EXE:PATH=/sbin/FileCheck
MKL_Core_LINK_LIBRARY:FILEPATH=MKL_Core_LINK_LIBRARY-NOTFOUND
MKL_DIR:PATH=MKL_DIR-NOTFOUND
MKL_FFTW_INCLUDE_DIR:PATH=MKL_FFTW_INCLUDE_DIR-NOTFOUND
MKL_INCLUDE_DIR:PATH=MKL_INCLUDE_DIR-NOTFOUND
MKL_Interface_LINK_LIBRARY:FILEPATH=MKL_Interface_LINK_LIBRARY-NOTFOUND
MKL_RT_LINK_LIBRARY:FILEPATH=MKL_RT_LINK_LIBRARY-NOTFOUND
MKL_THREAD_LAYER:STRING=Intel OpenMP
MKL_ThreadLayer_LINK_LIBRARY:FILEPATH=MKL_ThreadLayer_LINK_LIBRARY-NOTFOUND
MKL_ThreadingLibrary_LINK_LIBRARY:FILEPATH=MKL_ThreadingLibrary_LINK_LIBRARY-NOTFOUND
MKL_mkl_avx2_LINK_LIBRARY:FILEPATH=MKL_mkl_avx2_LINK_LIBRARY-NOTFOUND
MKL_mkl_avx512_LINK_LIBRARY:FILEPATH=MKL_mkl_avx512_LINK_LIBRARY-NOTFOUND
MKL_mkl_avx_LINK_LIBRARY:FILEPATH=MKL_mkl_avx_LINK_LIBRARY-NOTFOUND
MKL_mkl_def_LINK_LIBRARY:FILEPATH=MKL_mkl_def_LINK_LIBRARY-NOTFOUND
MKL_mkl_mc3_LINK_LIBRARY:FILEPATH=MKL_mkl_mc3_LINK_LIBRARY-NOTFOUND
MKL_mkl_mc_LINK_LIBRARY:FILEPATH=MKL_mkl_mc_LINK_LIBRARY-NOTFOUND
USE_PREBUILT_ARRAYFIRE:BOOL=OFF

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