Re: [Bug-gnulib] Argp compilation failure with _GNU_SOURCE and optimization

[Paul Eggert]

"Soeren D. Schulze" <address@hidden> writes:

> I do not know what went wrong -- I just got this error.  Can you
> reproduce it?

No, but I don't have much context.

> I am not familiar enough with GCC to tell you what is wrong.

Perhaps if you ran this command:

gcc -E -O3 -D_GNU_SOURCE lib/argp-fmtstream.c

and looked at the output you might see what the __extension__ problem
is.

> I had checked the sources for obvious errors, but everything looked
> OK, so I reported this in the hope someone can figure out.

One thought is that some system file has #define'ed mempcpy before
mempcpy.h was included, to a set of tokens that includes __extension__.

Does it fix things if you insert this line at the start of mempcpy.h:

  #ifndef mempcpy

and append this line to the end of that file?

  #endif