systemd: Allow specifying unit dir to configure

systemd isn't necessarily in the buildroot at the time that plymouth
gets built, so autodetection of the unitdir from pkgconfig isn't
necessarily feasible.

This commit adds a new option to configure, --with-systemdunitdir,
that lets distros specify the unit directory manually.

https://bugs.gentoo.org/show_bug.cgi?id=543712

diff --git a/configure.ac b/configure.ac
index 110cc691c33c743984e6b15b78c1800a4b701f6f..445034d3e5fe2bb8ebbb9bf303f5fa97f2c75e00 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -122,7 +122,12 @@ AM_CONDITIONAL(ENABLE_SYSTEMD_INTEGRATION, [test "$enable_systemd_integration" =
 
 if test x$enable_systemd_integration = xyes; then
   AC_DEFINE(PLY_ENABLE_SYSTEMD_INTEGRATION, 1, [Coordinate boot up with systemd])
-  SYSTEMD_UNIT_DIR=$($PKG_CONFIG --variable=systemdsystemunitdir systemd)
+  AC_ARG_WITH([systemdunitdir], AC_HELP_STRING([--with-systemdunitdir=DIR],
+    [path to systemd service directory]), [path_systemdunit=${withval}],
+      [path_systemdunit="`$PKG_CONFIG --variable=systemdsystemunitdir systemd`"])
+  if (test -n "${path_systemdunit}"); then
+    SYSTEMD_UNIT_DIR="${path_systemdunit}"
+  fi
   AC_SUBST(SYSTEMD_UNIT_DIR)
 fi