Paul E Reimer reported in <https://lists.gnu.org/archive/html/bug-gettext/2024-02/msg00002.html>:
> I am installing gettext-0.22.4. ... As you can see, "make check" produces > two errors in msgconv-3 and lang-c++ > FAIL: lang-c++ > ============== > > In file included from prog.cc:5: > In file included from > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1/iostream:43: > In file included from > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1/ios:221: > In file included from > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1/__locale:18: > In file included from > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1/mutex:191: > In file included from > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1/__memory/shared_ptr.h:42: > In file included from > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1/atomic:2668: > In file included from > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1/cmath:317: > /Users/reimer/local/src/gettext-0.22.4/gettext-tools/gnulib-lib/math.h:3190:43: > error: 'isnan' is missing exception specification 'throw()' > _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan, isnan, bool) > ^ > /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include/c++/v1/math.h:455:87: > note: previous declaration is here > _LIBCPP_NODISCARD_EXT inline _LIBCPP_CONSTEXPR_SINCE_CXX23 > _LIBCPP_HIDE_FROM_ABI bool isnan(float __x) _NOEXCEPT { > > ^ Instead of trying to guess whether to declare isnan() with throw() or without throw(), let me stop this crazy complexity here and treat macOS like FreeBSD. 2024-02-14 Bruno Haible <br...@clisp.org> isnan: Fix compilation error in C++ mode on macOS 14.4 / Xcode 15.2. Reported by Paul E Reimer <rei...@anl.gov> in <https://lists.gnu.org/archive/html/bug-gettext/2024-02/msg00002.html>. * lib/math.in.h (GNULIB_NAMESPACE_LACKS_ISNAN): Define also on macOS with clang ≥ 14. diff --git a/lib/math.in.h b/lib/math.in.h index 718a270164..85b7e6ff95 100644 --- a/lib/math.in.h +++ b/lib/math.in.h @@ -2668,7 +2668,7 @@ _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isnan) _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan, rpl_isnan, bool) # define isnan rpl_isnan # define GNULIB_NAMESPACE_LACKS_ISNAN 1 -# elif (defined __FreeBSD__ && __clang_major__ >= 14) +# elif (((defined __APPLE__ && defined __MACH__) || defined __FreeBSD__) && __clang_major__ >= 14) /* Neither of the two possible _GL_MATH_CXX_REAL_FLOATING_DECL_2 invocations works. Inline functions are already present in /usr/include/c++/v1/math.h, which comes from LLVM. */