$NetBSD: patch-GNUmakefile,v 1.2 2025/06/27 17:13:31 schmonz Exp $

Respect CFLAGS, follow hier(7), support PKGMANDIR.

--- GNUmakefile.orig	2024-10-31 13:42:37.000000000 +0000
+++ GNUmakefile
@@ -4,10 +4,10 @@
 # in /opt/diet, where they are in the default search path for my diet libc
 # work but don't conflict with anything there.  YMMV.
 
-prefix=/opt/diet
+prefix=${PREFIX}
 LIBDIR=${prefix}/lib
 INCLUDEDIR=${prefix}/include
-MAN3DIR=${prefix}/man/man3
+MAN3DIR=${prefix}/${PKGMANDIR}/man3
 
 LIBS=byte.a fmt.a scan.a str.a uint.a open.a stralloc.a unix.a socket.a \
 buffer.a mmap.a taia.a tai.a dns.a case.a mult.a array.a io.a \
@@ -41,8 +41,8 @@ OPT_PLUS=-O3 $(NATIVE)
 
 DEFINE=-D_REENTRANT
 
-CFLAGS=-pipe $(WARN) $(DEFINE) $(OPT_REG)
-CFLAGS_OPT=-pipe $(WARN) $(DEFINE) $(OPT_PLUS)
+CFLAGS+=-pipe $(WARN) $(DEFINE) $(OPT_REG)
+CFLAGS_OPT+=-pipe $(WARN) $(DEFINE) $(OPT_PLUS)
 
 #CFLAGS=-pipe -Os -march=pentiumpro -mcpu=pentiumpro -fomit-frame-pointer -fschedule-insns2 -Wall