Re: GCC __cplusplus definition on rawhide

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On Mon, 2025-01-27 at 19:31 +0000, Sérgio Basto via devel wrote:
> Hi,
> 
> I just want check, if I'm thinking correctly before submitting a fix
> in
> gtest package 
> 
> The problem is on Rawhide I have this warning that make other
> packages
> fail to build [1] 
> 
> gtest source [2] source get __cplusplus value and include <version>
> or
> #include <ciso646>  depending on __cplusplus value .
> 
> On rawhide I got the warning, on Fedora 41 don't but __cplusplus of
> GCC
> compiler is the same (201703)


 __cplusplus value GCC on rawhide should be 202002 ? 


> My proposal is to change the comparison from 202002L to 201703L 
> -#if GTEST_INTERNAL_CPLUSPLUS_LANG >= 202002L && \
> +#if GTEST_INTERNAL_CPLUSPLUS_LANG >= 201703L && \
> 
> What do you think ? 
> 
> Best regards, 
> 
> [1]
> /usr/include/c++/15/ciso646:46:4: warning: #warning "<ciso646> is
> deprecated in C++17, use <version> to detect implementation-specific
> macros" [-Wcpp]                 
>         46 | #  warning "<ciso646> is deprecated in C++17, use
> <version> to detect implementation-specific macros"
>            |    ^~~~~~~
> 
> [2]
> https://github.com/google/googletest/blob/main/googletest/include/gtest/internal/gtest-port.h#L274
> 
> // Detect C++ feature test macros as gracefully as possible.
> // MSVC >= 19.15, Clang >= 3.4.1, and GCC >= 4.1.2 support feature
> test macros.
> #if GTEST_INTERNAL_CPLUSPLUS_LANG >= 202002L && \
>     (!defined(__has_include) ||
> GTEST_INTERNAL_HAS_INCLUDE(<version>))
> #include <version>  // C++20 and later
> #elif (!defined(__has_include) ||
> GTEST_INTERNAL_HAS_INCLUDE(<ciso646>))
> #include <ciso646>  // Pre-C++20
> #endif
> 
> [3]
> #include <iostream>
> 
> int main() {
>     std::cout << "__cplusplus: " << __cplusplus << std::endl;
>     return 0;
> }
> 
> g++ check_cpp_version.cpp -o check_cpp_version && ./check_cpp_version
> __cplusplus: 201703
> 
> 
> 
> -- 
> Sérgio M. B.

-- 
Sérgio M. B.
-- 
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