Snap redux

Makedefs.in

@@ -172,8 +172,6 @@ DSOFLAGS	=	@DSOFLAGS@
 DNSSDLIBS	=	@DNSSDLIBS@
 IPPFIND_BIN	=	@IPPFIND_BIN@
 IPPFIND_MAN	=	@IPPFIND_MAN@
-APPARMORLIBS	=	@APPARMORLIBS@
-SNAPDGLIBLIBS	=	@SNAPDGLIBLIBS@
 LDFLAGS		=	@LDFLAGS@
 LINKCUPS	=	@LINKCUPS@
 LINKCUPSSTATIC	=	../cups/$(LIBCUPSSTATIC) $(LIBS)
@@ -183,7 +181,7 @@ ONDEMANDLIBS	=	@ONDEMANDLIBS@
 OPTIM		=	@OPTIM@
 OPTIONS		=	@WARNING_OPTIONS@
 PAMLIBS		=	@PAMLIBS@
-SERVERLIBS	=	@SERVERLIBS@
+SERVERLIBS	=	@SERVERLIBS@ @APPARMORLIBS@ @SNAPDGLIBLIBS@
 TLSFLAGS	=	@TLSFLAGS@
 TLSLIBS		=	@TLSLIBS@
 UNITTESTS	=	@UNITTESTS@

config-scripts/cups-container.m4

@@ -0,0 +1,58 @@
+dnl
+dnl Support for packaging CUPS in different kinds of containers.
+dnl
+dnl Copyright © 2021 by OpenPrinting
+dnl
+dnl Licensed under Apache License v2.0.  See the file "LICENSE" for more
+dnl information.
+dnl
+
+dnl Specify a container mode
+CONTAINER="none"
+
+AC_ARG_WITH([container], AS_HELP_STRING([--with-container=...], [configure to use in container (none, snap)]), [
+    CONTAINER="$withval"
+])
+
+AS_CASE(["$CONTAINER"], [none], [
+    # No container in use
+], [snap], [
+    # Building as a snap
+    AC_DEFINE([CUPS_SNAP], [1], [Building as a snap (snapcraft.io)?])
+], [*], [
+    AC_MSG_ERROR([Unsupported container '$CONTAINER' specified.])
+])
+
+
+dnl Supporting libraries for different containers...
+APPARMORLIBS=""
+SNAPDGLIBLIBS=""
+AC_SUBST([APPARMORLIBS])
+AC_SUBST([SNAPDGLIBLIBS])
+
+AS_IF(["x$PKGCONFIG" != x], [
+    AC_MSG_CHECKING([for libapparmor])
+    AS_IF([$PKGCONFIG --exists libapparmor], [
+	AC_MSG_RESULT([yes])
+
+	CFLAGS="$CFLAGS $($PKGCONFIG --cflags libapparmor)"
+	APPARMORLIBS="$($PKGCONFIG --libs libapparmor)"
+	AC_DEFINE([HAVE_LIBAPPARMOR], [1], [Have the apparmor library?])
+
+	AC_MSG_CHECKING([for libsnapd-glib])
+	AS_IF([$PKGCONFIG --exists snapd-glib glib-2.0 gio-2.0], [
+	    AC_MSG_RESULT([yes])
+	    CFLAGS="$CFLAGS $($PKGCONFIG --cflags snapd-glib glib-2.0 gio-2.0)"
+	    SNAPDGLIBLIBS="$($PKGCONFIG --libs snapd-glib glib-2.0 gio-2.0)"
+	    AC_DEFINE([HAVE_LIBSNAPDGLIB], [1], [Have the snapd-glib library?])
+	    SAVELIBS="$LIBS"
+	    LIBS="$SNAPDGLIBLIBS $LIBS"
+	    AC_CHECK_FUNC([snapd_client_run_snapctl2_sync], [
+		AC_DEFINE([HAVE_SNAPD_CLIENT_RUN_SNAPCTL2_SYNC], [1], [Have the snapd_client_run_snapctl2_sync function?])
+	    ])
+	    LIBS="$SAVELIBS"
+	], [
+	    AC_MSG_RESULT([no])
+	])
+    ])
+])

config.h.in

@@ -650,20 +650,6 @@
 #undef HAVE_SYS_STATVFS_H
 #undef HAVE_SYS_VFS_H
 
-/*
- * Do we want Snap packaging support and have the needed libraries and
- * utilities?
- */
-
-#undef HAVE_APPARMOR
-#undef HAVE_SNAPDGLIB
-#undef HAVE_SNAPD_CLIENT_RUN_SNAPCTL2_SYNC
-#undef HAVE_SNAPCTL_IS_CONNECTED
-#undef OUR_SNAP_NAME
-#undef SNAPCTL
-#undef CUPS_CONTROL_SLOT
-#undef SUPPORT_SNAPPED_CUPSD
-#undef SUPPORT_SNAPPED_CLIENTS
 
 /*
  * Location of macOS localization bundle, if any.
@@ -696,4 +682,33 @@ static __inline int _cups_abs(int i) { return (i < 0 ? -i : i); }
 #  endif /* __GNUC__ || __STDC_VERSION__ */
 #endif /* !HAVE_ABS && !abs */
 
+
+/*
+ * Building as a snap (snapcraft.io)?
+ */
+
+#undef CUPS_SNAP
+
+
+/*
+ * Have the apparmor library?
+ */
+
+#undef HAVE_LIBAPPARMOR
+
+
+/*
+ * Have the snapd-glib library?
+ */
+
+#undef HAVE_LIBSNAPDGLIB
+
+
+/*
+ * Have the snapd_client_run_snapctl2_sync function?
+ */
+
+#undef HAVE_SNAPD_CLIENT_RUN_SNAPCTL2_SYNC
+
+
 #endif /* !_CUPS_CONFIG_H_ */