gcc/
* Makefile.in (PICFLAG): New.
(enable_host_shared): New.
(INTERNAL_CFLAGS): Use PICFLAG.
(LIBIBERTY): Use pic build of libiberty.a if configured with
--enable-host-shared.
* configure.ac: Add --enable-host-shared, setting up new
PICFLAG variable.
* configure: Regenerate.
* doc/install.texi (--enable-shared): Add note contrasting it
with...
(--enable-host-shared): New option.
libbacktrace/
* configure.ac: Add --enable-host-shared, setting up
pre-existing PIC_FLAG variable within Makefile.am et al.
* configure: Regenerate.