Compile error in `format-inl.h` when including FMT using CMake's `FetchContent` on Windows

[szymonj99]

I'm using CMake and using GitHub Actions to compile the code remotely. I'm getting the same compile error locally.

Using this commit: a8fe8be

I like to think the options below might be of use (e.g. The C++ standard I'm using.) 🚀

CMakeLists.txt

...
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS ON)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
add_subdirectory(src)

src/CMakeLists.txt

...
FetchContent_Declare(fmt
  GIT_REPOSITORY https://github.com/fmtlib/fmt.git
  GIT_TAG a8fe8becf45b520c03250bda6e6914786ee91d83
)
FetchContent_MakeAvailable(... fmt ...)
...
set(BUILD_SHARED_LIBS OFF)
...
set(SPDLOG_FMT_EXTERNAL_HO ON)
set(SPDLOG_FMT_EXTERNAL OFF)
...
target_link_libraries(${PROJECT_NAME} PRIVATE ... fmt::fmt-header-only ...)
...
target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_20)
...

Error log

...\build\_deps\fmt-src\include\fmt\format-inl.h(1823,44): warning C4003: not enough arguments for function-like macro invocation 'max'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1823,44): error C2589: '(': illegal token on right side of '::'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1823): error C2062: type 'unknown-type' unexpected
...\build\_deps\fmt-src\include\fmt\format-inl.h(1823,55): error C2059: syntax error: ')'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1828,43): warning C4003: not enough arguments for function-like macro invocation 'max'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1828,43): error C2589: '(': illegal token on right side of '::'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1828): error C2062: type 'unknown-type' unexpected
...\build\_deps\fmt-src\include\fmt\format-inl.h(1828,53): error C2059: syntax error: ')'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1828,55): error C2143: syntax error: missing ';' before '{'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1855,46): warning C4003: not enough arguments for function-like macro invocation 'max'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1855,46): error C2589: '(': illegal token on right side of '::'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1855): error C2062: type 'unknown-type' unexpected
...\build\_deps\fmt-src\include\fmt\format-inl.h(1855,57): error C2059: syntax error: ')'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1860,45): warning C4003: not enough arguments for function-like macro invocation 'max'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1860,45): error C2589: '(': illegal token on right side of '::'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1860): error C2062: type 'unknown-type' unexpected
...\build\_deps\fmt-src\include\fmt\format-inl.h(1860,55): error C2059: syntax error: ')'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1860,57): error C2143: syntax error: missing ';' before '{'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1876,44): warning C4003: not enough arguments for function-like macro invocation 'max'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1876,44): error C2589: '(': illegal token on right side of '::'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1876): error C2062: type 'unknown-type' unexpected
...\build\_deps\fmt-src\include\fmt\format-inl.h(1876,55): error C2059: syntax error: ')'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1881,43): warning C4003: not enough arguments for function-like macro invocation 'max'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1881,43): error C2589: '(': illegal token on right side of '::'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1881): error C2062: type 'unknown-type' unexpected
...\build\_deps\fmt-src\include\fmt\format-inl.h(1881,53): error C2059: syntax error: ')'
...\build\_deps\fmt-src\include\fmt\format-inl.h(1881,55): error C2143: syntax error: missing ';' before '{'

I wonder if this is a configuration issue instead, or something to do with me including additional dependencies 🤔

[vitaut]

The max issue should be worked around in 9a1beab.

[szymonj99]

Can confirm, the commit above fixed the issue. 💯

[vitaut]

Thanks for reporting and checking the fix!