[Bug go/94513] [10 Regression] go buildid and cgo tools require symbols in GLIBC_PRIVATE namespace

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94513

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|build                       |
             Status|NEW                         |UNCONFIRMED
             Target|*-linux-gnu                 |
          Component|libgcc                      |go
     Ever confirmed|1                           |0
           Assignee|unassigned at gcc dot gnu.org      |ian at airs dot com
   Last reconfirmed|2020-04-07 00:00:00         |
            Summary|[10 Regression] morestack   |[10 Regression] go buildid
                   |require symbols in          |and cgo tools require
                   |GLIBC_PRIVATE namespace     |symbols in GLIBC_PRIVATE
                   |                            |namespace
      Known to work|                            |9.3.1

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
For configurability generic-morestack.c should likely use a private wrapper
for mmap and munmap used in the single place of actual allocation/deallocation
(and maybe declared always_inline) while the "probing" uses in
__morestack_load_mmap can refer back to the libc variants.

This still works "correctly" on the GCC 9 branch.