[Bug libstdc++/109818] std::trunc() requires a hack after building DJGPP

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109818

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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  Attachment #55070|0                           |1
        is obsolete|                            |

--- Comment #33 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Created attachment 55232
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55232&action=edit
Patch to make cmath configure tests more granular

Rebased patch. Attaching it here as I don't intend to keep it in my local git
repo.