Recreate repo

GNUmakefile

@@ -0,0 +1,50 @@
+PREFIX = /usr/local
+BINDIR = bin
+MANDIR = share/man
+MAN1 = man1
+
+PKG_CONFIG = pkg-config
+INSTALL = install
+
+CFLAGS = -O2 -pipe
+override CFLAGS += -std=gnu23 -Wall -Wextra
+override CPPFLAGS += -MMD -D_GNU_SOURCE -D_DEFAULT_SOURCE -D_OPENBSD_SOURCE
+LDFLAGS = -Wl,-O1 -Wl,--as-needed
+
+# Platform-dependent checks
+PLATFORM = $(shell uname)
+ifeq ($(PLATFORM), Linux)
+override CPPFLAGS += $(shell $(PKG_CONFIG) --cflags libbsd-overlay)
+override LDLIBS += $(shell $(PKG_CONFIG) --libs libbsd-overlay)
+endif
+ifeq ($(PLATFORM), OpenBSD)
+MANDIR = man
+override CPPFLAGS += -DHAVE_PLEDGE
+endif
+ifeq ($(PLATFORM), NetBSD)
+MANDIR = man
+endif
+ifeq ($(PLATFORM), SunOS)
+# OpenIndiana ld doesn't recognize GNU ld flags
+override LDFLAGS =
+endif
+
+PROG = can
+OBJS = can.o user.o group.o action.o
+DEPS = $(patsubst %.o, %.d, $(OBJS))
+
+.PHONY: all
+all: $(PROG)
+
+$(PROG): $(OBJS)
+
+-include $(DEPS)
+
+.PHONY: clean
+clean:
+	rm -f $(PROG) $(OBJS) $(DEPS)
+
+.PHONY: install
+install:
+	$(INSTALL) -Dm755 $(PROG) $(DESTDIR)$(PREFIX)/$(BINDIR)/$(PROG)
+	$(INSTALL) -Dm644 $(PROG).1 $(DESTDIR)$(PREFIX)/$(MANDIR)/$(MAN1)/$(PROG).1