Previously, the ppp version was only detected (and used) at one place,
in "nm-pppd-compat.c", after including the ppp headers. That was nice
and easy.
However, with that way, we could only detect it after including ppp
headers, and given the ugliness of ppp headers, we only want to include
them in "nm-pppd-compat.c" (and nowhere else).
In particular, 'nm-pppd-compat.c" uses symbols from the ppp daemon, it
thus can only be linked into a ppp plugin, not in NetworkManager core
itself. But at some places we will need to know the ppp version, outside
of the ppp plugin and "nm-pppd-compat.c".
Additionally, detect it at configure time and place it in "config.h".
There is a static assert that we are in agreement with the two ways of
detection.
Using the ppp code is rather ugly.
Historically, the pppd headers don't follow a good naming convention,
and define things that cause conflicts with our headers:
/usr/include/pppd/patchlevel.h:#define VERSION "2.4.9"
/usr/include/pppd/pppd.h:typedef unsigned char bool;
Hence we had to include the pppd headers in certain order, and be
careful.
ppp 2.5 changes API and cleans that up. But since we need to support
also old versions, it does not immediately simplify anything.
Only include "pppd" headers in "nm-pppd-compat.c" and expose a wrapper
API from "nm-pppd-compat.h". The purpose is that "nm-pppd-compat.h"
exposes clean names, while all the handling of ppp is in the source
file.
This change does the following
* Adding in nm-pppd-compat.h to mask details regarding different
versions of pppd.
* Fix the nm-pppd-plugin.c regarding differences in API between
2.4.9 (current) and latet pppd 2.5.0 in master branch
* Additional fixes to the configure.ac to appropriately set defines used
for compilation
Recent gettext version can extract and merge back strings from and to
various file formats, no need for intltool anymore.
https://wiki.gnome.org/Initiatives/GnomeGoals/GettextMigrationhttps://gitlab.freedesktop.org/NetworkManager/NetworkManager/issues/133https://github.com/NetworkManager/NetworkManager/pull/303https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/96
Clarification about the use of AM_GNU_GETTEXT_REQUIRE_VERSION:
In configure.ac, specify the minimum gettext version we require, rather
than the exact one. This fixes a situation where the autoconf macros
used for gettext will be the latest available on the system (for
example, 0.20); but the copied-in Makefile.in.in will be for the exact
version specified in configure.ac (in this case, 0.19).
In that situation, the gettext build rules will error out at `make` time
with the message:
*** error: gettext infrastructure mismatch: using a Makefile.in.in
from gettext version 0.19 but the autoconf macros are from gettext
version 0.20
Avoid that by specifying a minimum version dependency rather than an
exact one. This should not cause problems as we haven’t committed any
generated or external gettext files into git, so each developer will end
up regenerating the build system for their system’s version of gettext,
as expected.
See the subsection of
https://www.gnu.org/software/gettext/manual/html_node/Version-Control-Issues.html
for more information.
Note that autoreconf currently doesn’t recognise
AM_GNU_GETTEXT_REQUIRE_VERSION, so we must continue also using
AM_GNU_GETTEXT_VERSION. autopoint will ignore the latter if the former
is present. See
https://lists.gnu.org/archive/html/autoconf-patches/2015-10/msg00000.html.
[lkundrak@v3.sk: Fixed the meson build, adjusted autogen.sh:
droped "|| exit 1", dropped call to aclocal,
dropped --copy from gtkdocize.]
