Rename makefiles BUILD.mk

This way they appear at the top of directory listings.

tool/lambda/BUILD.mk

@@ -0,0 +1,57 @@
+#-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
+#───vi: set et ft=make ts=8 tw=8 fenc=utf-8 :vi───────────────────────┘
+
+PKGS += TOOL_LAMBDA
+
+TOOL_LAMBDA_SRCS := $(wildcard tool/lambda/*.c)
+
+TOOL_LAMBDA_OBJS =						\
+	$(TOOL_LAMBDA_SRCS:%.c=o/$(MODE)/%.o)
+
+TOOL_LAMBDA_COMS :=						\
+	$(TOOL_LAMBDA_SRCS:%.c=o/$(MODE)/%.com)
+
+TOOL_LAMBDA_BINS =						\
+	$(TOOL_LAMBDA_COMS)					\
+	$(TOOL_LAMBDA_COMS:%=%.dbg)
+
+TOOL_LAMBDA_DIRECTDEPS =					\
+	LIBC_CALLS						\
+	LIBC_FMT						\
+	LIBC_INTRIN						\
+	LIBC_LOG						\
+	LIBC_MEM						\
+	LIBC_NEXGEN32E						\
+	LIBC_RUNTIME						\
+	LIBC_STDIO						\
+	LIBC_STR						\
+	LIBC_SYSV						\
+	LIBC_X							\
+	THIRD_PARTY_GETOPT					\
+	TOOL_LAMBDA_LIB
+
+TOOL_LAMBDA_DEPS :=						\
+	$(call uniq,$(foreach x,$(TOOL_LAMBDA_DIRECTDEPS),$($(x))))
+
+o/$(MODE)/tool/lambda/lambda.pkg:				\
+		$(TOOL_LAMBDA_OBJS)				\
+		$(foreach x,$(TOOL_LAMBDA_DIRECTDEPS),$($(x)_A).pkg)
+
+o/$(MODE)/tool/lambda/%.com.dbg:				\
+		$(TOOL_LAMBDA_DEPS)				\
+		o/$(MODE)/tool/lambda/%.o			\
+		o/$(MODE)/tool/lambda/lambda.pkg		\
+		$(CRT)						\
+		$(APE_NO_MODIFY_SELF)
+	@$(APELINK)
+
+o/$(MODE)/tool/lambda/tromp.o: private				\
+		CFLAGS +=					\
+			-w
+
+$(TOOL_LAMBDA_OBJS):						\
+		$(BUILD_FILES)					\
+		tool/lambda/BUILD.mk
+
+.PHONY: o/$(MODE)/tool/lambda
+o/$(MODE)/tool/lambda: $(TOOL_LAMBDA_BINS) $(TOOL_LAMBDA_CHECKS)