File retrogram-rtlsdr-obey-cxx-flags.patch of Package retrogram-rtlsdr

diff --git a/Makefile b/Makefile
index 5641600..bd8573f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 TARGET = retrogram-rtlsdr
 LIBS = -lncurses -lboost_program_options -lrtlsdr
 CXX = g++
-CXXFLAGS = -g -Wall -std=c++11
+CXXFLAGS += -g -Wall -std=c++11
 
 .PHONY: default all clean