$NetBSD$

Do not overwrite $CC from environment with specific compiler.
Honor CPPFLAGS, CFLAGS and LDFLAGS for build.
Honor DESTDIR and PREFIX for install.

--- Makefile.orig	2023-07-14 09:48:48.000000000 +0000
+++ Makefile
@@ -1,10 +1,8 @@
-CC=gcc
-#CC=clang
-CXXFLAGS=-Wall
+# Modified version for pkgsrc
 
-OUT = build/linux
+OUT = build
 SRC = src
-INTERMEDIATE = build/linux/objs
+INTERMEDIATE = build/objs
 
 SOURCES = $(filter-out src/tokens_generated_scanners.c,$(wildcard $(SRC)/*.c))
 OBJECTS = $(patsubst $(SRC)/%.c,$(INTERMEDIATE)/%.o,$(SOURCES))
@@ -19,10 +17,10 @@ all: $(OUT)/carburetta $(OUT)/calc $(OUT
 
 $(INTERMEDIATE)/%.o: $(SRC)/%.c
 	@mkdir -p $(@D)
-	$(CC) -c -o $@ $<
+	$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $<
 
 $(OUT)/carburetta: $(OBJECTS)
-	$(CC) -o $(OUT)/carburetta $(OBJECTS)
+	$(CC) $(LDFLAGS) -o $(OUT)/carburetta $(OBJECTS)
 
 $(INTERMEDIATE)/calc/calc.c: $(OUT)/carburetta examples/calc/calc.cbrt
 	mkdir -p $(@D)
@@ -37,13 +35,13 @@ $(INTERMEDIATE)/template_scan/template_s
 	$(OUT)/carburetta examples/template_scan/template_scan.cbrt --c $(INTERMEDIATE)/template_scan/template_scan.c
 
 $(OUT)/calc: $(INTERMEDIATE)/calc/calc.c
-	$(CC) -o $(OUT)/calc $(INTERMEDIATE)/calc/calc.c
+	$(CC) $(CPPFLAGS) $(CFLAGS) -o $(OUT)/calc $(INTERMEDIATE)/calc/calc.c
 
 $(OUT)/inireader: $(INTERMEDIATE)/inireader/iniparser.c examples/inireader/main.c
-	$(CC) -o $(OUT)/inireader -I$(INTERMEDIATE)/inireader -Iexamples/inireader $(INTERMEDIATE)/inireader/iniparser.c examples/inireader/main.c
+	$(CC) $(CPPFLAGS) $(CFLAGS) -o $(OUT)/inireader -I$(INTERMEDIATE)/inireader -Iexamples/inireader $(INTERMEDIATE)/inireader/iniparser.c examples/inireader/main.c
 
 $(OUT)/template_scan: $(INTERMEDIATE)/template_scan/template_scan.c
-	$(CC) -o $(OUT)/template_scan $(INTERMEDIATE)/template_scan/template_scan.c
+	$(CC) $(CPPFLAGS) $(CFLAGS) -o $(OUT)/template_scan $(INTERMEDIATE)/template_scan/template_scan.c
 
 .PRECIOUS: $(INTERMEDIATE)/tester/%.c
 $(INTERMEDIATE)/tester/%.c: tester/%.cbrt
@@ -71,11 +69,11 @@ clean:
 
 .PHONY: install
 install: all
-	install $(OUT)/carburetta /usr/local/bin
+	install $(OUT)/carburetta $(DESTDIR)$(PREFIX)/bin
 
 .PHONY: uninstall
 uninstall:
-	rm /usr/local/bin/carburetta
+	rm $(DESTDIR)$(PREFIX)/bin/carburetta
 
 .PHONY: test
 test: all