build: Posixfy the Makefile

Makefile

@@ -1,8 +1,16 @@
+.POSIX:
 include config.mk
 
 .SUFFIXES:
 .SUFFIXES: .o .c
 
+CPPFLAGS =\
+	-D_DEFAULT_SOURCE \
+	-D_NETBSD_SOURCE \
+	-D_BSD_SOURCE \
+	-D_XOPEN_SOURCE=700 \
+	-D_FILE_OFFSET_BITS=64
+
 HDR =\
 	arg.h\
 	compat.h\
@@ -189,13 +197,13 @@ all: $(BIN)
 
 $(BIN): $(LIB)
 
-$(OBJ): $(HDR) config.mk
+$(OBJ): $(HDR)
 
 .o:
 	$(CC) $(LDFLAGS) -o $@ $< $(LIB)
 
 .c.o:
-	$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ -c $<
+	$(CC) $(CPPFLAGS) $(CFLAGS) -o $@ -c $<
 
 libutf.a: $(LIBUTFOBJ)
 	$(AR) $(ARFLAGS) $@ $?

config.mk

@@ -5,12 +5,11 @@ VERSION = 0.0
 PREFIX = /usr/local
 MANPREFIX = $(PREFIX)/share/man
 
-CC = cc
-AR = ar
+# tools
+#CC =
+#AR =
 RANLIB = ranlib
 
-# for NetBSD add -D_NETBSD_SOURCE
 # -lrt might be needed on some systems
-CPPFLAGS = -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700 -D_FILE_OFFSET_BITS=64
-CFLAGS   = -std=c99 -Wall -pedantic
-LDFLAGS  = -s
+# CFLAGS   =
+# LDFLAGS  =