<ciso646> is gone from C++20, so use <version> for >= C++20.
See https://stackoverflow.com/a/31658120. Signed-off-by: Sam James <s...@gentoo.org> --- eclass/toolchain-funcs.eclass | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/eclass/toolchain-funcs.eclass b/eclass/toolchain-funcs.eclass index ae21a18a14c23..baf032bbd4ecc 100644 --- a/eclass/toolchain-funcs.eclass +++ b/eclass/toolchain-funcs.eclass @@ -1156,7 +1156,12 @@ tc-enables-ssp-all() { # # If the library is not recognized, the function returns 1. tc-get-cxx-stdlib() { - local code='#include <ciso646> + local code=' +#if __cplusplus >= 202002L + #include <version> +#else + #include <ciso646> +#endif #if defined(_LIBCPP_VERSION) HAVE_LIBCXX -- 2.49.0
