Re: Build failure with flex 2.5.4 (Re: [PATCH] fix race when building ada-lex.c)

[Simon Marchi <simon dot marchi at polymtl dot ca>]

On 2018-05-03 10:37, Ulrich Weigand wrote:
> John Reiser wrote:
>
> > gdb/ChangeLog:
> >          * gdb/Makefile.in: (.c:.l, .c:.y): Write the target only in 
> > the
> >          last step, and do it atomically.
>
> > +	    $(FLEX) --stdout $<  \
>
> This causes a build failure on my RHEL 5 based Cell/B.E. dailybuild,
> since flex 2.5.4 does not yet support the long option --stdout.
>
> Is there any reason not to use the equivalent short option -t instead?
>
> Bye,
> Ulrich

Huh, I also wondered whether --stdout was a widely available option.  I 
found it was added by this commit in flex:

  https://github.com/westes/flex/commit/16fe6f3

and since it is 16-17 years old, I didn't raise a flag.  But we can 
certainly use -t.  Can you confirm it works as intended on that system?

Simon