--- Makefile.orig	2023-12-14 21:25:00 UTC
+++ Makefile
@@ -1,5 +1,5 @@
 CC       =  c++
-CFLAGS   =  -O2 -Wall -Wunused -lpthread $(shell fltk-config --use-images --cxxflags --ldflags) \
+CFLAGS  += -Wall -Wunused -lpthread $(shell fltk-config --use-images --cxxflags --ldflags) \
 			--std=c++11 -finline-functions
 DEBUGFLGS=  -g -O0
 BINDIR   = /usr/local/bin
@@ -10,6 +10,8 @@ LIBVNC   = $(shell pkg-config --cflags --libs libvnccl
 OSNAME   = $(shell uname -s)
 
 
+all: spiritvnc-fltk
+
 spiritvnc-fltk:
 	@echo "Building on '$(OSNAME)'"
 	@echo
@@ -41,7 +43,7 @@ clean::
 	rm -f $(TARGET)
 
 install:
-	install -c -s -o root -m 555 $(TARGET) $(BINDIR)
+	$(BSD_INSTALL_PROGRAM) $(TARGET) $(DESTDIR)$(BINDIR)/spiritvnc
 	@echo
 
 uninstall: