[Bug bootstrap/70704] [6 Regression] AIX bootstrap comparison failure

[michael.haubenwallner@ssi-schaefer.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70704

Michael Haubenwallner <michael.haubenwallner@ssi-schaefer.com> changed:

           What    |Removed                     |Added
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                 CC|                            |michael.haubenwallner@ssi-s
                   |                            |chaefer.com

--- Comment #44 from Michael Haubenwallner <michael.haubenwallner@ssi-schaefer.com> ---
Created attachment 38338
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38338&action=edit
FLEX listens to M4 envvar, unset.

Does it help to set M4=/opt/freeware/bin/m4 in the environment, so configure is
forced to take GNU m4?

Once upon a time, I've had similar problems here, although with older gcc, and
use attached patch to fix it - maybe it is of some help here as well.

Problem is that flex does listen to the M4 environment variable. Dependent on
PATH, configure may find AIX m4 (/usr/bin) or GNU m4 (/opt/freeware/bin).

When M4=AIX-m4, flex-generated code breaks.