bash-5.3$ CXX=g++-15 cmake --preset gcc-release -D CMAKE_CXX_STANDARD=23 -D BEMAN_UTF_VIEW_USE_MODULES=1 --fresh --log-level=VERBOSE
Preset CMake variables:
CMAKE_BUILD_TYPE="RelWithDebInfo"
CMAKE_EXPORT_COMPILE_COMMANDS="ON"
CMAKE_PROJECT_TOP_LEVEL_INCLUDES="./infra/cmake/use-fetch-content.cmake"
CMAKE_TOOLCHAIN_FILE="infra/cmake/gnu-toolchain.cmake"
-- The CXX compiler identification is GNU 15.2.0
-- Checking whether CXX compiler has -isysroot
-- Checking whether CXX compiler has -isysroot - yes
-- Checking whether CXX compiler supports OSX deployment target flag
-- Checking whether CXX compiler supports OSX deployment target flag - yes
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/local/bin/g++ - skipped
-- Detecting CXX compile features
CMake Warning (dev) at /Users/clausklein/.local/share/cmake-4.3/Modules/Compiler/CMakeCommonCompilerMacros.cmake:226 (cmake_language):
CMake's support for `import std;` in C++23 and newer is experimental. It
is meant only for experimentation and feedback to CMake developers.
Call Stack (most recent call first):
/Users/clausklein/.local/share/cmake-4.3/Modules/CMakeDetermineCompilerSupport.cmake:110 (cmake_cxx_find_modules_json)
/Users/clausklein/.local/share/cmake-4.3/Modules/CMakeTestCXXCompiler.cmake:83 (CMAKE_DETERMINE_COMPILER_SUPPORT)
CMakeLists.txt:7 (project)
This warning is for project developers. Use -Wno-dev to suppress it.
-- Detecting CXX compile features - done
CMake Warning at /Users/clausklein/.local/share/cmake-4.3/Modules/CPack.cmake:541 (message):
CPack.cmake has already been included!!
Call Stack (most recent call first):
build/gcc-release/_deps/transform_view-src/infra/cmake/beman-install-library.cmake:325 (include)
build/gcc-release/_deps/transform_view-src/CMakeLists.txt:45 (include)
-- beman-install-library(beman.transform_view): COMPONENT 'transform_view'
-- beman_install_library(beman.transform_view): EXPORT_NAME transform_view for TARGET 'beman.transform_view'
-- beman-install-library(beman.transform_view): 'beman.transform_view' has INTERFACE_HEADER_SETS=HEADERS
-- beman-install-library(beman.transform_view): 'beman.transform_view' has INTERFACE_CXX_MODULE_SETS=CXX_MODULES
-- Configuring Build Telemetry
-- beman-install-library(beman.utf_view): COMPONENT 'utf_view'
-- beman_install_library(beman.utf_view): EXPORT_NAME utf_view for TARGET 'beman.utf_view'
-- beman-install-library(beman.utf_view): 'beman.utf_view' has INTERFACE_HEADER_SETS=HEADERS
-- beman-install-library(beman.utf_view): 'beman.utf_view' has INTERFACE_CXX_MODULE_SETS=CXX_MODULES
-- beman_install_library(beman.utf_view): EXPORT_NAME transform_view for TARGET 'beman.transform_view'
-- beman-install-library(beman.utf_view): 'beman.transform_view' has INTERFACE_HEADER_SETS=HEADERS
-- beman-install-library(beman.utf_view): 'beman.transform_view' has INTERFACE_CXX_MODULE_SETS=CXX_MODULES
Examples to be built: readme_examples;null_term_argv_environ
-- Configuring done (2.8s)
-- Generating done (0.0s)
-- Build files have been written to: /Users/clausklein/Workspace/cpp/beman-project/utf_view/build/gcc-release
bash-5.3$ cmake --build --preset gcc-release --target install
[1/2] Collecting build metrics
[32/46] Building CXX object CMakeFiles/beman.utf_view.dir/include/beman/utf_view/utf_view.cppm.o
FAILED: [code=1] CMakeFiles/beman.utf_view.dir/include/beman/utf_view/utf_view.cppm.o CMakeFiles/beman.utf_view.dir/beman.utf_view.gcm
"/Users/clausklein/.local/bin/ctest" --instrument --command-type compile --target-name beman.utf_view --config RelWithDebInfo --build-dir "/Users/clausklein/Workspace/cpp/beman-project/utf_view/build/gcc-release" --output CMakeFiles/beman.utf_view.dir/include/beman/utf_view/utf_view.cppm.o --source /Users/clausklein/Workspace/cpp/beman-project/utf_view/include/beman/utf_view/utf_view.cppm --language CXX -- ccache /usr/local/bin/g++ -I/Users/clausklein/Workspace/cpp/beman-project/utf_view/include -I/Users/clausklein/Workspace/cpp/beman-project/utf_view/build/gcc-release/include -I/Users/clausklein/Workspace/cpp/beman-project/utf_view/build/gcc-release/_deps/transform_view-src/include -I/Users/clausklein/Workspace/cpp/beman-project/utf_view/build/gcc-release/_deps/transform_view-build/include -O3 -O2 -g -DNDEBUG -std=gnu++23 -MD -MT CMakeFiles/beman.utf_view.dir/include/beman/utf_view/utf_view.cppm.o -MF CMakeFiles/beman.utf_view.dir/include/beman/utf_view/utf_view.cppm.o.d -fmodules-ts -fmodule-mapper=CMakeFiles/beman.utf_view.dir/include/beman/utf_view/utf_view.cppm.o.modmap -MD -fdeps-format=p1689r5 -x c++ -o CMakeFiles/beman.utf_view.dir/include/beman/utf_view/utf_view.cppm.o -c /Users/clausklein/Workspace/cpp/beman-project/utf_view/include/beman/utf_view/utf_view.cppm
In file included from /Users/clausklein/Workspace/cpp/beman-project/utf_view/include/beman/utf_view/utf_view.hpp:14,
from /Users/clausklein/Workspace/cpp/beman-project/utf_view/include/beman/utf_view/utf_view.cppm:18:
/Users/clausklein/Workspace/cpp/beman-project/utf_view/include/beman/utf_view/endian_view.hpp: In member function 'constexpr auto beman::utf_view::detail::exposition_only_byteswap_if_native_is_big_endian::operator()(auto:2) const':
/Users/clausklein/Workspace/cpp/beman-project/utf_view/include/beman/utf_view/endian_view.hpp:39:19: error: 'byteswap' is not a member of 'std' [-Wtemplate-body]
39 | return std::byteswap(x);
| ^~~~~~~~
/Users/clausklein/Workspace/cpp/beman-project/utf_view/include/beman/utf_view/endian_view.hpp: In member function 'constexpr auto beman::utf_view::detail::exposition_only_byteswap_if_native_is_little_endian::operator()(auto:3) const':
/Users/clausklein/Workspace/cpp/beman-project/utf_view/include/beman/utf_view/endian_view.hpp:49:19: error: 'byteswap' is not a member of 'std' [-Wtemplate-body]
49 | return std::byteswap(x);
| ^~~~~~~~
ninja: build stopped: subcommand failed.
bash-5.3$ 
