https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100663
Bug ID: 100663 Summary: dietlibc build fail 'FP_NAN' was not declared in this scope Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: libstdc++ Assignee: unassigned at gcc dot gnu.org Reporter: unlvsur at live dot com Target Milestone: --- Created attachment 50841 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50841&action=edit error message There are other build issues. 1. __leaf variables are macros on dietlibc. 2. libstdc++ script mistreats dietlibc as glibc and uses glibc's locale setting which needs to be fixed.