$NetBSD: patch-Makefile,v 1.3 2022/09/11 11:58:20 martin Exp $

- Use CC instead of C to specify the C compiler and do not hardcode gcc
- Honors user's {C,LD}FLAGS
- Make the install target more flexible

--- Makefile.orig	2015-09-20 14:07:55.000000000 +0000
+++ Makefile
@@ -5,23 +5,28 @@
 #
 
 
-C=gcc
-CFLAGS=-c -Wall 
-LDFLAGS= -lm -lstdc++
+CFLAGS+=-c -Wall -D__linux__	# linux here means ~posix
+LDFLAGS+= -lm
-SOURCES=sunwait.cpp sunriset.cpp print.cpp sunwait.h sunriset.h print.h
+SOURCES=sunwait.cpp sunriset.cpp print.cpp
 OBJECTS=$(SOURCES:.cpp=.o)
 EXECUTABLE=sunwait
 
+PREFIX?=	/usr
+
+INSTALL_PROGRAM?=	install -m 755
+INSTALL_PROGRAM_DIR?=	install -d -m 755
+
 all: $(SOURCES) $(EXECUTABLE)
 	
 $(EXECUTABLE): $(OBJECTS)
-	$(C) $(OBJECTS) -o $@ $(LDFLAGS)
+	$(CXX) $(OBJECTS) -o $@ $(LDFLAGS)
 
 .cpp.o:
-	$(C) $(CFLAGS) $< -o $@
+	$(CXX) -c $(CFLAGS) $< -o $@
 
 clean:
 	rm -f *.o sunwait
 
 install:
-	install -D -m 755 sunwait $(DESTDIR)/usr/bin/sunwait
+	${INSTALL_PROGRAM_DIR} $(DESTDIR)$(PREFIX)/bin
+	${INSTALL_PROGRAM} sunwait $(DESTDIR)$(PREFIX)/bin/sunwait