From: Ritesh Raj Sarraf <rrs@debian.org>
Date: Sun, 22 Mar 2020 11:36:38 +0530
Subject: Use the debian build flags

The upstream Makefile was not retaining the build flags provided by the
Debian build system. It was overriding it. This patch ensures that the
build flags from the Debian build system are in use
---
 Makefile | 5 +++++
 1 file changed, 5 insertions(+)

--- a/Makefile
+++ b/Makefile
@@ -57,6 +57,9 @@
 LTO_FLAGS :=
 endif
 
+HARDENING_CXXFLAGS := $(shell dpkg-buildflags --get CXXFLAGS)
+HARDENING_LDFLAGS := $(shell dpkg-buildflags --get LDFLAGS)
+
 SRC	    = $(wildcard src/*.cpp)
 OBJS        = $(SRC:src/%.cpp=build/.src/%.o)
 DEPS        = $(SRC:src/%.cpp=build/.src/%.d)
@@ -78,6 +81,7 @@
               -std=c++11 \
               $(STATIC_FLAGS) \
               $(LTO_FLAGS) \
+	      $(HARDENING_CXXFLAGS) \
               -Wall \
               -Wno-unused-result \
               -MMD
@@ -93,6 +97,7 @@
 
 LDFLAGS := \
     ${LDFLAGS} \
+    $(HARDENING_LDFLAGS) \
     -pthread \
     -latomic \
     -lrt