File galmon-obey-cflags.patch of Package galmon

diff --git a/Makefile b/Makefile
index 8afa6ef..aa4e1ff 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 CFLAGS = -O3 -Wall -ggdb 
 
-CXXFLAGS:= -std=gnu++17 -Wall -O0 -ggdb -MMD -MP -fno-omit-frame-pointer -Iext/CLI11 \
+CXXFLAGS += -std=gnu++17 -Wall -O0 -ggdb -MMD -MP -fno-omit-frame-pointer -Iext/CLI11 \
 	 -Iext/fmt-9.1.0/include/ -Iext/powerblog/ext/simplesocket -Iext/powerblog/ext/ \
 	 -I/usr/local/opt/openssl/include/  \
 	 -Iext/sgp4/libsgp4/ \