--- makefile.orig	2023-10-20 14:17:07 UTC
+++ makefile
@@ -8,22 +8,22 @@ PROJ=fxt
 include flags.mk
 
 #### choose the FLAG combo here:
-FXT_CXXFLAGS=
+#FXT_CXXFLAGS=
 #FXT_CXXFLAGS += -std=c++11
-FXT_CXXFLAGS += -std=c++17
-FXT_CXXFLAGS += -pipe
+#FXT_CXXFLAGS += -std=c++17
+#FXT_CXXFLAGS += -pipe
 #FXT_CXXFLAGS += -fno-exceptions
-FXT_CXXFLAGS += $(OFLAGS) # uncomment for OPTIMIZATION
+#FXT_CXXFLAGS += $(OFLAGS) # uncomment for OPTIMIZATION
 #FXT_CXXFLAGS += -O3 # test -O3
-FXT_CXXFLAGS += $(GFLAGS) # uncomment for DEBUGGING
+#FXT_CXXFLAGS += $(GFLAGS) # uncomment for DEBUGGING
 #FXT_CXXFLAGS += $(PFLAGS) # uncomment for PROFILING
 #
-FXT_CXXFLAGS += $(WFLAGS) # uncomment for WARNINGS
+#FXT_CXXFLAGS += $(WFLAGS) # uncomment for WARNINGS
 #FXT_CXXFLAGS += -Werror # make all warnings ERRORS
 #FXT_CXXFLAGS += -fmax-errors=1 # clang chokes on this one
 
 #FXT_CXXFLAGS += -D__NO_MATH_INLINES
-FXT_CXXFLAGS += $(FXT_EXTRA_FLAGS)
+#FXT_CXXFLAGS += $(FXT_EXTRA_FLAGS)
 
 #FXT_CXXFLAGS += $(CLANG_FLAGS)  ## for clang++
 
@@ -199,15 +199,15 @@ INCDIR=$(PREFIX)/include/fxt
 .PHONY: install  ## install to $(PREFIX)/lib/ and $(PREFIX)/include/fxt/
 install: lib
 	: '[$@]'
-	@echo 'PREFIX=$(PREFIX)  LIBDIR=$(LIBDIR)  INCDIR=$(INCDIR)'
+	@echo 'PREFIX=$(PREFIX)  LIBDIR=$(LIBDIR)  INCDIR=$(DESTDIR)$(INCDIR)'
 	@:
-	@test -d $(INCDIR)  ||  mkdir $(INCDIR)
-	@$(FXT_INSTALL) $(FXTIDIR)/*.h $(INCDIR)/
-	@cd src && for f in $(SHFXTSRCDIRS); do mkdir -p $(INCDIR)/$$f; done
-	@cd src && for f in $(SHFXTSRCDIRS); do $(FXT_INSTALL) $$f/*.h $(INCDIR)/$$f; done
+	@test -d $(DESTDIR)$(INCDIR)  ||  mkdir $(DESTDIR)$(INCDIR)
+	@$(FXT_INSTALL) $(FXTIDIR)/*.h $(DESTDIR)$(INCDIR)/
+	@cd src && for f in $(SHFXTSRCDIRS); do mkdir -p $(DESTDIR)$(INCDIR)/$$f; done
+	@cd src && for f in $(SHFXTSRCDIRS); do $(FXT_INSTALL) $$f/*.h $(DESTDIR)$(INCDIR)/$$f; done
 	@:
-	@test -d $(LIBDIR)  ||  mkdir $(LIBDIR)
-	@$(FXT_INSTALL) $(FXTLIB) $(LIBDIR)/
+	@test -d $(DESTDIR)$(LIBDIR)  ||  mkdir $(DESTDIR)$(LIBDIR)
+	@$(FXT_INSTALL) $(FXTLIB) $(DESTDIR)$(LIBDIR)/
 	: '[$@ OK]'
 
 .PHONY: chk-install ##x print whether installed header files are up to date