[Bug target/100015] MSDOS DJGPP host build mallinfo was not declared

[unlvsur at live dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100015

--- Comment #1 from cqwrteur <unlvsur at live dot com> ---
Created attachment 50543
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50543&action=edit
Demo patch