m4/systemd.m4

   1 # systemd.m4 - Macros to check for and enable systemd          -*- Autoconf -*-
   2 #
   3 # Copyright (C) 2014 Luis R. Rodriguez <mcgrof@suse.com>
   4 # Copyright (C) 2016 Pieter Lexis <pieter.lexis@powerdns.com>
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation; either version 2 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful, but
  12 # WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 # General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program; if not, write to the Free Software Foundation, Inc.,
  18 # 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  19
  20 #serial 2
  21
  22 dnl Some optional path options
  23 AC_DEFUN([AX_SYSTEMD_OPTIONS], [
  24         AC_ARG_WITH(systemd, [  --with-systemd          set directory for systemd service files],
  25                 SYSTEMD_DIR="$withval", SYSTEMD_DIR="")
  26         AC_SUBST(SYSTEMD_DIR)
  27
  28         AC_ARG_WITH(systemd, [  --with-systemd-modules-load          set directory for systemd modules load files],
  29                 SYSTEMD_MODULES_LOAD="$withval", SYSTEMD_MODULES_LOAD="")
  30         AC_SUBST(SYSTEMD_MODULES_LOAD)
  31 ])
  32
  33 AC_DEFUN([AX_ENABLE_SYSTEMD_OPTS], [
  34         AX_ARG_DEFAULT_ENABLE([systemd], [Disable systemd support])
  35         AX_SYSTEMD_OPTIONS()
  36 ])
  37
  38 AC_DEFUN([AX_ALLOW_SYSTEMD_OPTS], [
  39         AX_ARG_DEFAULT_DISABLE([systemd], [Enable systemd support], [$1])
  40         AX_SYSTEMD_OPTIONS()
  41 ])
  42
  43 AC_DEFUN([AX_CHECK_SYSTEMD_LIBS], [
  44         AC_REQUIRE([AX_CHECK_SYSTEMD_DETECT_AND_ENABLE])
  45         AS_IF([test "x$libsystemd" = x], [
  46             AC_MSG_ERROR([Unable to find a suitable libsystemd library])
  47         ])
  48
  49         PKG_CHECK_MODULES([SYSTEMD], [$libsystemd_daemon])
  50         dnl pkg-config older than 0.24 does not set these for
  51         dnl PKG_CHECK_MODULES() worth also noting is that as of version 208
  52         dnl of systemd pkg-config --cflags currently yields no extra flags yet.
  53         AC_SUBST([SYSTEMD_CFLAGS])
  54         AC_SUBST([SYSTEMD_LIBS])
  55
  56         AS_IF([test "x$SYSTEMD_DIR" = x], [
  57             dnl In order to use the line below we need to fix upstream systemd
  58             dnl to properly ${prefix} for child variables in
  59             dnl src/core/systemd.pc.in but this is a bit complex at the
  60             dnl moment as they depend on another rootprefix, which can vary
  61             dnl from prefix in practice. We provide our own definition as we
  62             dnl *know* where systemd will dump this to, but this does limit
  63             dnl us to stick to a non custom systemdsystemunitdir, dnl to work
  64             dnl around this we provide the additional configure option
  65             dnl --with-systemd where you can specify the directory for the unit
  66             dnl files. It would also be best to just extend the upstream
  67             dnl pkg-config  pkg.m4 with an AC_DEFUN() to do this neatly.
  68             dnl SYSTEMD_DIR="`$PKG_CONFIG --define-variable=prefix=$PREFIX --variable=systemdsystemunitdir systemd`"
  69             SYSTEMD_DIR="\$(prefix)/lib/systemd/system/"
  70         ], [])
  71
  72         AS_IF([test "x$SYSTEMD_DIR" = x], [
  73             AC_MSG_ERROR([SYSTEMD_DIR is unset])
  74         ], [])
  75
  76         dnl There is no variable for this yet for some reason
  77         AS_IF([test "x$SYSTEMD_MODULES_LOAD" = x], [
  78             SYSTEMD_MODULES_LOAD="\$(prefix)/lib/modules-load.d/"
  79         ], [])
  80
  81         AS_IF([test "x$SYSTEMD_MODULES_LOAD" = x], [
  82             AC_MSG_ERROR([SYSTEMD_MODULES_LOAD is unset])
  83         ], [])
  84 ])
  85
  86 AC_DEFUN([AX_CHECK_SYSTEMD], [
  87         dnl Respect user override to disable
  88         AS_IF([test "x$enable_systemd" != "xno"], [
  89              AS_IF([test "x$systemd" = "xy" ], [
  90                 AC_DEFINE([HAVE_SYSTEMD], [1], [Systemd available and enabled])
  91                         systemd=y
  92                         AX_CHECK_SYSTEMD_LIBS()
  93             ],[systemd=n])
  94         ],[systemd=n])
  95 ])
  96
  97 AC_DEFUN([AX_CHECK_SYSTEMD_DETECT_AND_ENABLE], [
  98         AC_CHECK_HEADER([systemd/sd-daemon.h], [
  99                 for libname in systemd-daemon systemd; do
 100                         AC_CHECK_LIB([$libname], [sd_listen_fds], [
 101                                 libsystemd_daemon="lib$libname"
 102                                 systemd=y
 103                                 libsystemd=y
 104                         ])
 105                 done
 106         ])
 107 ])
 108
 109 dnl Enables systemd by default and requires a --disable-systemd option flag
 110 dnl to configure if you want to disable.
 111 AC_DEFUN([AX_ENABLE_SYSTEMD], [
 112         AX_ENABLE_SYSTEMD_OPTS()
 113         AX_CHECK_SYSTEMD()
 114 ])
 115
 116 dnl Systemd will be disabled by default and requires you to run configure with
 117 dnl --enable-systemd to look for and enable systemd.
 118 AC_DEFUN([AX_ALLOW_SYSTEMD], [
 119         AX_ALLOW_SYSTEMD_OPTS()
 120         AX_CHECK_SYSTEMD()
 121 ])
 122
 123 dnl Systemd will be disabled by default but if your build system is detected
 124 dnl to have systemd build libraries it will be enabled. You can always force
 125 dnl disable with --disable-systemd
 126 AC_DEFUN([AX_AVAILABLE_SYSTEMD], [
 127         AX_ALLOW_SYSTEMD_OPTS([, but will be enabled when libraries are found])
 128         AX_CHECK_SYSTEMD_DETECT_AND_ENABLE()
 129         AX_CHECK_SYSTEMD()
 130 ])