diff --git source/Makefile.bsd_cygwin_linux_gcc.common source/Makefile.bsd_cygwin_linux_gcc.common
index 1d99864..27c17ec 100644
--- source/Makefile.bsd_cygwin_linux_gcc.common
+++ source/Makefile.bsd_cygwin_linux_gcc.common
@@ -20,9 +20,11 @@ LIBRARY_FLAGS		= -L/usr/lib
 
 CPPFLAGS		= $(DEBUG_FLAGS) $(CXXFLAGS_ARCHITECTURE) $(CXXFLAGS_BYTE_ORDER) $(CXXFLAGS_CONFIG) $(INCLUDE_FLAGS) $(CXXFLAGS_DEFINE) -D $(PROJECT_IDENTIFIER)_VERSION=\"$(PROJECT_VERSION)\"
 
-CXXFLAGS		= $(DEBUG_FLAGS) $(CXXFLAGS_ARCHITECTURE) $(CXXFLAGS_BYTE_ORDER) $(CXXFLAGS_CONFIG) $(INCLUDE_FLAGS) $(OPTIMIZE_FLAGS) $(CXXFLAGS_WARNING) -fno-exceptions -fno-rtti -fmessage-length=0 -pipe -fPIC -D $(PROJECT_IDENTIFIER)_VERSION=\"$(PROJECT_VERSION)\"
+CXXFLAFS		:= ${CXXFLAGS}
+CXXFLAGS		+= $(DEBUG_FLAGS) $(CXXFLAGS_ARCHITECTURE) $(CXXFLAGS_BYTE_ORDER) $(CXXFLAGS_CONFIG) $(INCLUDE_FLAGS) $(OPTIMIZE_FLAGS) $(CXXFLAGS_WARNING) -fno-exceptions -fno-rtti -fmessage-length=0 -pipe -fPIC -D $(PROJECT_IDENTIFIER)_VERSION=\"$(PROJECT_VERSION)\"
 
-LDFLAGS			= $(DEBUG_FLAGS) $(LDFLAGS_ARCHITECTURE) $(OPTIMIZE_FLAGS) -pipe -lm $(LIBRARY_FLAGS) -fPIC
+LDFLAGS			:= ${LDFLAGS}
+LDFLAGS			+= $(DEBUG_FLAGS) $(LDFLAGS_ARCHITECTURE) $(OPTIMIZE_FLAGS) -pipe -lm $(LIBRARY_FLAGS) -fPIC
 
 CXX			= $(CCACHE) $(GPLUSPLUS)
 LD			= $(GPLUSPLUS)