Re: [PATCH v3] gdbserver: fix the standalone build

[Yao Qi <yao@codesourcery.com>]

On 06/28/2013 08:22 PM, Pedro Alves wrote:
> Doesn't GDB, and whatever other users of create-version.h, need the
> same treatment first?

In GDB, the 'target_alias' and 'host_alias' can't be empty, and 
create-version.sh only has two users, GDB and GDBserver.

GDB is configured from the top level.  On the top level, the FOO_alias 
is set to @FOO_noncanonical@ (in Makefile.tpl).  The 
'target_noncanonical' is similar to 'version_target' we computed in 
gdbserver/configure.ac.  See config/acx.m4,

dnl ####
dnl # _GCC_TOPLEV_NONCANONICAL_TARGET
dnl # $target_alias or $host_noncanonical if blank.
dnl # Used when we would use $target_alias, but empty is not OK.
AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_TARGET],
[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_HOST]) []dnl
case ${target_alias} in
   "") target_noncanonical=${host_noncanonical} ;;
   *) target_noncanonical=${target_alias} ;;
esac
]) []dnl # _GCC_TOPLEV_NONCANONICAL_TARGET

and macro ACX_NONCANONICAL_TARGET is invoked in configure.ac.

the gdb/configure is invoked by passing "--build=${build_alias} 
--host=${host_alias} --target=${target_alias}" from the top level (see 
rule configure-gdb in Makefile.in).

-- 
Yao (齐尧)