[Bug libstdc++/100663] New: dietlibc build fail 'FP_NAN' was not declared in this scope

[Bug libstdc++/100663] New: dietlibc build fail 'FP_NAN' was not declared in this scope

[unlvsur at live dot com]

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.

[Bug libstdc++/100663] dietlibc build fail 'FP_NAN' was not declared in this scope

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100663

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |build
           Severity|normal                      |enhancement

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I don't think *-linux-dietlibc support has been ever upstreamed into GCC.
I am just seeing the support from config.{guess,sub} and libtool.  Nothing in
libgcc/config.host, gcc/config.gcc, or libstdc++/configure.host .

So you will need to add much more support than just libstdc++ here.


Since this was never supported, I am thinking about closing this as invalid but
I will let someone else make that call.