build: Generate correct dependencies for the pkg-config file

This fixes the bogus libnl dependency in the pkg-config file, and
centralizes all dependencies in configure.ac, to replace them at
configure time so that they accurately define the ones detected.
This also makes the build system future-proof against changing
dependencies in one place and not the other.

diff --git a/configure.ac b/configure.ac
index 35ec5bd..0361cc6 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -59,34 +59,45 @@ AC_ARG_ENABLE(pie, AC_HELP_STRING([--enable-pie],
 AC_CHECK_LIB(dl, dlopen, dummy=yes,
                        AC_MSG_ERROR(dynamic linking loader is required))
 
-PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.28, dummy=yes,
+GLIB_DEPS="glib-2.0 >= 2.28"
+PKG_CHECK_MODULES(GLIB, [${GLIB_DEPS}], dummy=yes,
                                AC_MSG_ERROR(GLib >= 2.28 is required))
 AC_SUBST(GLIB_CFLAGS)
 AC_SUBST(GLIB_LIBS)
+AC_SUBST(GLIB_DEPS)
 
-PKG_CHECK_MODULES(DBUS, dbus-1 >= 1.2, dummy=yes,
+DBUS_DEPS="dbus-1 >= 1.2"
+PKG_CHECK_MODULES(DBUS, [${DBUS_DEPS}], dummy=yes,
                                AC_MSG_ERROR(D-Bus >= 1.2 is required))
 AC_SUBST(DBUS_CFLAGS)
 AC_SUBST(DBUS_LIBS)
+AC_SUBST(DBUS_DEPS)
 
-PKG_CHECK_MODULES(LIBNL3, libnl-3.0 libnl-genl-3.0, [
+LIBNL3_DEPS="libnl-3.0 libnl-genl-3.0"
+PKG_CHECK_MODULES(LIBNL3, [${LIBNL3_DEPS}], [
        NETLINK_CFLAGS=${LIBNL3_CFLAGS}
        NETLINK_LIBS=${LIBNL3_LIBS}
+       NETLINK_DEPS=${LIBNL3_DEPS}
 ], [
-       PKG_CHECK_MODULES(LIBNL2, libnl-2.0, [
+       LIBNL2_DEPS="libnl-2.0"
+       PKG_CHECK_MODULES(LIBNL2, [${LIBNL2_DEPS}], [
                NETLINK_CFLAGS=${LIBNL2_CFLAGS}
                NETLINK_LIBS=${LIBNL2_LIBS}
+               NETLINK_DEPS=${LIBNL2_DEPS}
        ], [
-               PKG_CHECK_MODULES(LIBNL1, libnl-1, dummy=yes,
+               LIBNL1_DEPS="libnl-1"
+               PKG_CHECK_MODULES(LIBNL1, [${LIBNL1_DEPS}], dummy=yes,
                        AC_MSG_ERROR(Netlink library is required))
                AC_DEFINE(NEED_LIBNL_COMPAT, 1,
                        [Define to 1 if you need libnl-1 compat functions.])
                NETLINK_CFLAGS=${LIBNL1_CFLAGS}
                NETLINK_LIBS=${LIBNL1_LIBS}
+               NETLINK_DEPS=${LIBNL1_DEPS}
        ])
 ])
 AC_SUBST(NETLINK_CFLAGS)
 AC_SUBST(NETLINK_LIBS)
+AC_SUBST(NETLINK_DEPS)
 
 AC_ARG_ENABLE(test, AC_HELP_STRING([--enable-test],
                                        [enable test/example scripts]),

diff --git a/neard.pc.in b/neard.pc.in
index 3a46466..22a494c 100644 (file)
--- a/neard.pc.in
+++ b/neard.pc.in
@@ -7,7 +7,7 @@ plugindir=${libdir}/neard/plugins
 
 Name: neard
 Description: NFC daemon
-Requires: glib-2.0 dbus-1 libnl
+Requires: @GLIB_DEPS@ @DBUS_DEPS@ @NETLINK_DEPS@
 Version: @VERSION@
 Libs: -module -avoid-version -export-symbols-regex neard_plugin_desc
-Cflags: -I${includedir}
\ No newline at end of file
+Cflags: -I${includedir}