Install pkg-config files also for non-CMake builds

At the moment, pkg-config hint files are only installed when CMake is
used as build system. However, it is very convenient for programs using
libmosquitto to have these files always in place, so let's add it
here, too.

Signed-off-by: Michael Heimpold <michael.heimpold@i2se.com>

lib/Makefile

@@ -57,6 +57,9 @@ ifeq ($(WITH_STATIC_LIBRARIES),yes)
 endif
 	$(INSTALL) -d "${DESTDIR}${prefix}/include/"
 	$(INSTALL) mosquitto.h "${DESTDIR}${prefix}/include/mosquitto.h"
+	$(INSTALL) -d "${DESTDIR}$(prefix)/lib${LIB_SUFFIX}/pkgconfig"
+	$(INSTALL) -m644 ../libmosquitto.pc.in "${DESTDIR}$(prefix)/lib${LIB_SUFFIX}/pkgconfig/libmosquitto.pc"
+	sed -i -e "s#@CMAKE_INSTALL_PREFIX@#$(prefix)#" -e "s#@VERSION@#$(VERSION)#" "${DESTDIR}$(prefix)/lib${LIB_SUFFIX}/pkgconfig/libmosquitto.pc"
 	$(MAKE) -C cpp install
 
 uninstall :

lib/cpp/Makefile

@@ -24,6 +24,9 @@ ifeq ($(WITH_STATIC_LIBRARIES),yes)
 endif
 	$(INSTALL) -d "${DESTDIR}${prefix}/include/"
 	$(INSTALL) mosquittopp.h "${DESTDIR}${prefix}/include/mosquittopp.h"
+	$(INSTALL) -d "${DESTDIR}$(prefix)/lib${LIB_SUFFIX}/pkgconfig"
+	$(INSTALL) -m644 ../../libmosquittopp.pc.in "${DESTDIR}$(prefix)/lib${LIB_SUFFIX}/pkgconfig/libmosquittopp.pc"
+	sed -i -e "s#@CMAKE_INSTALL_PREFIX@#$(prefix)#" -e "s#@VERSION@#$(VERSION)#" "${DESTDIR}$(prefix)/lib${LIB_SUFFIX}/pkgconfig/libmosquittopp.pc"
 
 uninstall :
 	-rm -f "${DESTDIR}${prefix}/lib${LIB_SUFFIX}/libmosquittopp.so.${SOVERSION}"