--- src/Makefile.Linux.orig	2026-02-20 12:30:56 UTC
+++ src/Makefile.Linux
@@ -8,7 +8,7 @@ CXX?=g++
 CXX?=g++
 
 # C++ compiler flags
-CXXFLAGS = -Wall -fPIC ### basic flags (always needed)
+CXXFLAGS += -Wall -fPIC ### basic flags (always needed)
 CXXFLAGS += $(EXTRA_CXXFLAGS) ### external setting
 CXXFLAGS += -std=c++11
 CXXFLAGS += -O2