gnome-control-center/m4/as-ac-expand.m4
Bastien Nocera 83c8c57761 info: Get renderer from gnome-session under Wayland
Now that gnome-session's acceleration helper can print the renderer
under Wayland, launch it locally. We need to launch it locally as
Wayland is not available at the time gnome-session would launch the
helper, as there's no Wayland compositor yet.

Note that this code expects the gnome-session helper scripts to live
in $libexecdir, but distributions can use
--with-gnome-session-libexecdir=DIR to pass another one.

https://bugzilla.gnome.org/show_bug.cgi?id=756914
2016-10-18 16:11:30 +02:00

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dnl as-ac-expand.m4 0.2.0
dnl autostars m4 macro for expanding directories using configure's prefix
dnl thomas@apestaart.org
dnl AS_AC_EXPAND(VAR, CONFIGURE_VAR)
dnl example
dnl AS_AC_EXPAND(SYSCONFDIR, $sysconfdir)
dnl will set SYSCONFDIR to /usr/local/etc if prefix=/usr/local
AC_DEFUN([AS_AC_EXPAND],
[
EXP_VAR=[$1]
FROM_VAR=[$2]
dnl first expand prefix and exec_prefix if necessary
prefix_save=$prefix
exec_prefix_save=$exec_prefix
dnl if no prefix given, then use /usr/local, the default prefix
if test "x$prefix" = "xNONE"; then
prefix="$ac_default_prefix"
fi
dnl if no exec_prefix given, then use prefix
if test "x$exec_prefix" = "xNONE"; then
exec_prefix=$prefix
fi
full_var="$FROM_VAR"
dnl loop until it doesn't change anymore
while true; do
new_full_var="`eval echo $full_var`"
if test "x$new_full_var" = "x$full_var"; then break; fi
full_var=$new_full_var
done
dnl clean up
full_var=$new_full_var
AC_SUBST([$1], "$full_var")
dnl restore prefix and exec_prefix
prefix=$prefix_save
exec_prefix=$exec_prefix_save
])