Hi Simon, The macro gl_PREREQ_GC in m4/gc.m4 is nowhere invoked in gnulib and also not needed, because none of the files lib/gc.h, lib/gc-libgcrypt.c, lib/gc-gnulib.c uses the 'restrict' keyword.
I guess this macro could just be removed? Bruno -- In memoriam The victims of the Skelani massacre <http://books.google.de/books?id=nltdtAo38K0C&pg=PA41&lpg=PA41&source=bl&ots=DX2VTN1nga&sig=d_BXUZM0I81hZtfrSBA3392p-KY&hl=de&ei=JHy6TcGTCYmLswbpsrDzBQ&sa=X&oi=book_result&ct=result&resnum=1&ved=0CBkQ6AEwAA#v=onepage&q&f=false>
