Style:

- Makefiles shouldn't have copyrights.
- $Id$ should be preceded by a tab.
- Don't include ../Makefile.inc when it is not used explicitly.
- Use the normal amount of horizontal and vertical whitspace (1 tab/none).
- Don't override the (correct) default for MAN1.
- Use the correct order for -I paths.
- Don't use += to initialize SUBDIR.
- use the config.h generated by `configure' and don't use a huge
  CFLAGS statement.
I think the other Makefiles under src/gnu needs some polishing as well ;-)
Thanks to Bruce, everythig looks smarter now.
Obtained from:	Bruce Evans <bde@zeta.org.au>

gnu/usr.bin/dc/Makefile

@@ -1,26 +1,15 @@
-# Makefile copyright Andreas Klemm <andreas@FreeBSD.ORG> 1998
-#
-# $Id: Makefile,v 1.6 1998/04/29 22:14:40 andreas Exp $
-
-.include "${.CURDIR}/../Makefile.inc"
+#	$Id$
 
 .PATH:	${.CURDIR}/../../../contrib/bc/dc \
 	${.CURDIR}/../../../contrib/bc/lib \
 	${.CURDIR}/../../../contrib/bc/doc
 
-PROG=		dc
-SRCS=		array.c dc.c eval.c misc.c numeric.c stack.c string.c \
-		getopt.c getopt1.c number.c
-MAN1=		dc.1
-
-CFLAGS+=	-DHAVE_VPRINTF=1  -DSTDC_HEADERS=1 -DHAVE_ISGRAPH=1 \
-		-DHAVE_LIMITS_H=1 -DHAVE_STDARG_H=1 -DHAVE_STDDEF_H=1 \
-		-DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_UNISTD_H=1 \
-		-I${.CURDIR}/../../../contrib/bc/h -I${.CURDIR}
-
-DPADD=		${LIBM}
-LDADD=		-lm
-
-SUBDIR+= doc
+PROG=	dc
+SRCS=	array.c dc.c eval.c misc.c numeric.c stack.c string.c \
+	getopt.c getopt1.c number.c
+CFLAGS+=-I${.CURDIR} -I${.CURDIR}/../../../contrib/bc/h
+DPADD=	${LIBM}
+LDADD=	-lm
+SUBDIR=	doc
 
 .include <bsd.prog.mk>

gnu/usr.bin/dc/config.h

@@ -1,5 +1,69 @@
-/* config.h */
-#ifndef __STDC__
-#define VARARGS
-#endif
+/* config.h.  Generated automatically by configure.  */
+/* config.h.in.  Generated automatically from configure.in by autoheader.  */
+
+/* Define to empty if the keyword does not work.  */
+/* #undef const */
+
+/* Define if you don't have vprintf but do have _doprnt.  */
+/* #undef HAVE_DOPRNT */
+
+/* Define if you have the vprintf function.  */
+#define HAVE_VPRINTF 1
+
+/* Define if on MINIX.  */
+/* #undef _MINIX */
+
+/* Define if the system does not provide POSIX.1 features except
+   with this defined.  */
+/* #undef _POSIX_1_SOURCE */
+
+/* Define if you need to in order for stat and other things to work.  */
+/* #undef _POSIX_SOURCE */
+
+/* Define to `unsigned' if <sys/types.h> doesn't define.  */
+/* #undef size_t */
+
+/* Define if you have the ANSI C header files.  */
+#define STDC_HEADERS 1
+
+/* Define if lex declares yytext as a char * by default, not a char[].  */
 #define YYTEXT_POINTER 1
+
+/* PACKAGE name */
+#define PACKAGE "bc"
+
+/* Package VERSION number */
+#define VERSION "1.04"
+
+/* define if the math lib is to be loaded from a file. */
+/* #undef BC_MATH_FILE */
+
+/* Define to use the readline library. */
+/* #undef READLINE */
+
+/* Define to `size_t' if <sys/types.h> and <stddef.h> don't define.  */
+/* #undef ptrdiff_t */
+
+/* Define if you have the isgraph function.  */
+#define HAVE_ISGRAPH 1
+
+/* Define if you have the <lib.h> header file.  */
+/* #undef HAVE_LIB_H */
+
+/* Define if you have the <limits.h> header file.  */
+#define HAVE_LIMITS_H 1
+
+/* Define if you have the <stdarg.h> header file.  */
+#define HAVE_STDARG_H 1
+
+/* Define if you have the <stddef.h> header file.  */
+#define HAVE_STDDEF_H 1
+
+/* Define if you have the <stdlib.h> header file.  */
+#define HAVE_STDLIB_H 1
+
+/* Define if you have the <string.h> header file.  */
+#define HAVE_STRING_H 1
+
+/* Define if you have the <unistd.h> header file.  */
+#define HAVE_UNISTD_H 1