------- Comment From avina...@ibm.com 2025-07-16 00:47 EDT------- There seems to be two issues in this bug 1. The build silently fails when charconv library build fails (the logs say that the targets have been skipped, but the exit status from the build process is 1 meaning not successful, and therefore the over build fails). If we run the build with b2 again, we can see the error particularly in the charconv library 2. Redefinition of functions in charconv library. When ieeelongdouble is enabled, the types for long double and __float128 is essentially the same during compilation and we see the following error /home/avinashj/src/boost_1.88_src/libs/charconv/build/../src/to_chars_float_impl.hpp:849:17: error: redefinition of ?boost::charconv::to_chars_result boost::charconv::detail::to_chars_float_impl(char*, char*, Real, boost::charconv::chars_format, int) [with Real = long double]? 849 | to_chars_result to_chars_float_impl(char* first, char* last, __float128 value, chars_format fmt, int precision) noexcept | ^~~~~~~~~~~~~~~~~~~ /home/avinashj/src/boost_1.88_src/libs/charconv/build/../src/to_chars_float_impl.hpp:776:17: note: ?boost::charconv::to_chars_result boost::charconv::detail::to_chars_float_impl(char*, char*, Real, boost::charconv::chars_format, int) [with Real = long double]? previously declared here 776 | to_chars_result to_chars_float_impl(char* first, char* last, long double value, chars_format fmt, int precision) noexcept | ^~~~~~~~~~~~~~~~~~~ specifically the macros BOOST_CHARCONV_HAS_QUADMATH and BOOST_CHARCONV_UNSUPPORTED_LONG_DOUBLE are defined and undefined respectively, and therefore both definitions move on for compilation after pre-processing which causes this specific error. Small note: In some architectures like IA-64 __float128 is an alias for long double (more details here: https://gcc.gnu.org/onlinedocs/gcc/Floating-Types.html.), so this error would happen there as well. For example, in x86 platform if -mlong-double-128 compiler option is used (however here error happens at assembly stage rather than at compile stage).
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2110099 Title: ftbfs with IEEE long double To manage notifications about this bug go to: https://bugs.launchpad.net/boost/+bug/2110099/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
