$NetBSD: patch-Makefile,v 1.2 2023/06/01 13:03:53 bacon Exp $

# Respect env

--- Makefile.orig	2021-08-24 14:00:31.000000000 +0000
+++ Makefile
@@ -7,6 +7,8 @@ BINDIR ?= $(PREFIX)/bin
 INCLUDE_DIRS ?=
 LIBRARY_DIRS ?=
 
+STRIP	?= strip
+
 SRC := $(wildcard ${DIR_SRC}/*.cpp)
 OBJ := $(patsubst %.cpp,${DIR_OBJ}/%.o,$(notdir ${SRC}))
 
@@ -15,13 +17,17 @@ TARGET := fastp
 BIN_TARGET := ${TARGET}
 
 CXX ?= g++
-CXXFLAGS := -std=c++11 -g -O3 -I${DIR_INC} $(foreach includedir,$(INCLUDE_DIRS),-I$(includedir)) ${CXXFLAGS}
+# Optional flags that the user can override by setting CXXFLAGS in the
+# env or make argument
+CXXFLAGS ?= -g -O3
+# Required flags
+CXXFLAGS += -std=c++11 -I${DIR_INC} $(foreach includedir,$(INCLUDE_DIRS),-I$(includedir))
 LIBS := -lz -lpthread
-LD_FLAGS := $(foreach librarydir,$(LIBRARY_DIRS),-L$(librarydir)) $(LIBS) $(LD_FLAGS)
+LDFLAGS += $(foreach librarydir,$(LIBRARY_DIRS),-L$(librarydir)) $(LIBS)
 
 
 ${BIN_TARGET}:${OBJ}
-	$(CXX) $(OBJ) -o $@ $(LD_FLAGS)
+	$(CXX) $(OBJ) -o $@ $(LDFLAGS)
 
 ${DIR_OBJ}/%.o:${DIR_SRC}/%.cpp make_obj_dir
 	$(CXX) -c $< -o $@ $(CXXFLAGS)
@@ -43,6 +49,12 @@ make_obj_dir:
 		mkdir $(DIR_OBJ) ; \
 	fi
 
+# Respect DESTDIR for staged installs (used by most package managers)
 install:
-	install $(TARGET) $(BINDIR)/$(TARGET)
+	mkdir $(DESTDIR)$(BINDIR)
+	install $(TARGET) $(DESTDIR)$(BINDIR)/$(TARGET)
 	@echo "Installed."
+
+# Many package managers use install-strip target if debugging is not enabled
+install-strip: install
+	$(STRIP) $(DESTDIR)$(BINDIR)/$(TARGET)