configure.ac, src/Makefile.am: Add mqtt to the build system.

Author: octo

README

@@ -191,6 +191,9 @@ Features
       Reads values from Modbus/TCP enabled devices. Supports reading values
       from multiple "slaves" so gateway devices can be used.
 
+    - mqtt
+      Publishes and subscribes to MQTT topics.
+
     - multimeter
       Information provided by serial multimeters, such as the `Metex
       M-4650CR'.

README.md

@@ -2653,6 +2653,53 @@ fi
 AM_CONDITIONAL(BUILD_WITH_LIBMONGOC, test "x$with_libmongoc" = "xyes")
 # }}}
 
+# --with-libmosquitto {{{
+with_libmosquitto_cppflags=""
+with_libmosquitto_libs="-lmosquitto"
+AC_ARG_WITH(libmosquitto, [AS_HELP_STRING([--with-libmosquitto@<:@=PREFIX@:>@], [Path to libmosquitto.])],
+[
+	if test "x$withval" != "xno" && test "x$withval" != "xyes"
+	then
+		with_libmosquitto_cppflags="-I$withval/include"
+		with_libmosquitto_libs="-L$withval/lib -lmosquitto"
+		with_libmosquitto="yes"
+	else
+		with_libmosquitto="$withval"
+	fi
+],
+[
+	with_libmosquitto="yes"
+])
+if test "x$with_libmosquitto" = "xyes"
+then
+	SAVE_CPPFLAGS="$CPPFLAGS"
+	CPPFLAGS="$with_libmosquitto_cppflags"
+
+	AC_CHECK_HEADERS(mosquitto.h, [with_libmosquitto="yes"], [with_libmosquitto="no (mosquitto.h not found)"])
+
+	CPPFLAGS="$SAVE_CPPFLAGS"
+fi
+if test "x$with_libmosquitto" = "xyes"
+then
+	SAVE_LDFLAGS="$LDFLAGS"
+	SAVE_CPPFLAGS="$CPPFLAGS"
+	LDFLAGS="$with_libmosquitto_libs"
+	CPPFLAGS="$with_libmosquitto_cppflags"
+
+	AC_CHECK_LIB(mosquitto, mosquitto_connect, [with_libmosquitto="yes"], [with_libmosquitto="no (libmosquitto not found)"])
+
+	LDFLAGS="$SAVE_LDFLAGS"
+	CPPFLAGS="$SAVE_CPPFLAGS"
+fi
+if test "x$with_libmosquitto" = "xyes"
+then
+	BUILD_WITH_LIBMOSQUITTO_CPPFLAGS="$with_libmosquitto_cppflags"
+	BUILD_WITH_LIBMOSQUITTO_LIBS="$with_libmosquitto_libs"
+	AC_SUBST(BUILD_WITH_LIBMOSQUITTO_CPPFLAGS)
+	AC_SUBST(BUILD_WITH_LIBMOSQUITTO_LIBS)
+fi
+# }}}
+
 # --with-libmysql {{{
 with_mysql_config="mysql_config"
 with_mysql_cflags=""
@@ -5632,6 +5679,7 @@ AC_PLUGIN([memcached],   [yes],                [memcached statistics])
 AC_PLUGIN([memory],      [$plugin_memory],     [Memory usage])
 AC_PLUGIN([mic],         [$with_mic],          [Intel Many Integrated Core stats])
 AC_PLUGIN([modbus],      [$with_libmodbus],    [Modbus plugin])
+AC_PLUGIN([mqtt],        [$with_libmosquitto], [MQTT output plugin])
 AC_PLUGIN([multimeter],  [$plugin_multimeter], [Read multimeter values])
 AC_PLUGIN([mysql],       [$with_libmysql],     [MySQL statistics])
 AC_PLUGIN([netapp],      [$with_libnetapp],    [NetApp plugin])
@@ -5912,6 +5960,7 @@ Configuration:
     libmnl  . . . . . . . $with_libmnl
     libmodbus . . . . . . $with_libmodbus
     libmongoc . . . . . . $with_libmongoc
+    libmosquitto  . . . . $with_libmosquitto
     libmysql  . . . . . . $with_libmysql
     libnetapp . . . . . . $with_libnetapp
     libnetsnmp  . . . . . $with_libnetsnmp
@@ -6011,6 +6060,7 @@ Configuration:
     memory  . . . . . . . $enable_memory
     mic . . . . . . . . . $enable_mic
     modbus  . . . . . . . $enable_modbus
+    mqtt  . . . . . . . . $enable_mqtt
     multimeter  . . . . . $enable_multimeter
     mysql . . . . . . . . $enable_mysql
     netapp  . . . . . . . $enable_netapp

configure.ac

@@ -637,6 +637,14 @@ modbus_la_CFLAGS = $(AM_CFLAGS) $(BUILD_WITH_LIBMODBUS_CFLAGS)
 modbus_la_LIBADD = $(BUILD_WITH_LIBMODBUS_LIBS)
 endif
 
+if BUILD_PLUGIN_MQTT
+pkglib_LTLIBRARIES += mqtt.la
+mqtt_la_SOURCES = mqtt.c
+mqtt_la_LDFLAGS = $(PLUGIN_LDFLAGS)
+mqtt_la_CFLAGS = $(AM_CFLAGS) $(BUILD_WITH_LIBMOSQUITTO_CFLAGS)
+mqtt_la_LIBADD = $(BUILD_WITH_LIBMOSQUITTO_LIBS)
+endif
+
 if BUILD_PLUGIN_MULTIMETER
 pkglib_LTLIBRARIES += multimeter.la
 multimeter_la_SOURCES = multimeter.c