1 files changed, 106 insertions, 0 deletions
diff --git a/contrib/bmake/mk/posix.mk b/contrib/bmake/mk/posix.mk
new file mode 100644
index 000000000000..b7cb9ef32108
--- /dev/null
+++ b/contrib/bmake/mk/posix.mk
@@ -0,0 +1,106 @@
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# $Id: posix.mk,v 1.3 2024/02/17 17:26:57 sjg Exp $
+#
+#	@(#) Copyright (c) 2022, Simon J. Gerraty
+#
+#	This file is provided in the hope that it will
+#	be of use.  There is absolutely NO WARRANTY.
+#	Permission to copy, redistribute or otherwise
+#	use this file is hereby granted provided that
+#	the above copyright notice and this notice are
+#	left intact.
+#
+#	Please send copies of changes and bug-fixes to:
+#	sjg@crufty.net
+#
+
+# The minimal set of rules required by POSIX
+
+.if !defined(%POSIX)
+.error ${.newline}Do not inlcude this directly, put .POSIX: at start of Makefile
+.endif
+
+.if ${.MAKEFLAGS:M-r} == ""
+# undo some work done by sys.mk
+.SUFFIXES:
+.undef ARFLAGS
+.undef CC CFLAGS
+.undef FC FFLAGS
+.undef LDFLAGS LFLAGS
+.undef RANLIBFLAGS
+.undef YFLAGS
+.endif
+
+.SUFFIXES: .o .c .y .l .a .sh .f
+
+# these can still be set via environment
+AR ?= ar
+ARFLAGS ?= -rv
+CC ?= c99
+CFLAGS ?= -O
+FC ?= fort77
+FFLAGS ?= -O 1
+LDFLAGS ?= 
+LEX ?= lex
+LFLAGS ?=
+RANLIBFLAGS ?= -D
+YACC ?= yacc
+YFLAGS ?= 
+
+.c:
+	${CC} ${CFLAGS} ${LDFLAGS} -o $@ $<
+
+
+.f:
+	${FC} ${FFLAGS} ${LDFLAGS} -o $@ $<
+
+
+.sh:
+	cp $< $@
+	chmod a+x $@
+
+
+.c.o:
+	${CC} ${CFLAGS} -c $<
+
+
+.f.o:
+	${FC} ${FFLAGS} -c $<
+
+
+.y.o:
+	${YACC} ${YFLAGS} $<
+	${CC} ${CFLAGS} -c y.tab.c
+	rm -f y.tab.c
+	mv y.tab.o $@
+
+
+.l.o:
+	${LEX} ${LFLAGS} $<
+	${CC} ${CFLAGS} -c lex.yy.c
+	rm -f lex.yy.c
+	mv lex.yy.o $@
+
+
+.y.c:
+	${YACC} ${YFLAGS} $<
+	mv y.tab.c $@
+
+
+.l.c:
+	${LEX} ${LFLAGS} $<
+	mv lex.yy.c $@
+
+
+.c.a:
+	${CC} -c ${CFLAGS} $<
+	${AR} ${ARFLAGS} $@ $*.o
+	rm -f $*.o
+
+
+.f.a:
+	${FC} -c ${FFLAGS} $<
+	${AR} ${ARFLAGS} $@ $*.o
+	rm -f $*.o
+