build test from pro

librf625.pro

+# https://gitlab.com/riftek/dev/rf625/librf625
+
 QT       -= core gui
 
+# uncomment to build test binary
 #CONFIG += test
 
 DEFINES += RF625_LIBRARY
@@ -28,3 +31,5 @@ SOURCES += \
     src/rf625.cpp \
     src/sockfun.cpp \
     src/wshlp.cpp
+
+test: SOURCES += src/test.cpp