From f08649b6aa6c359c0ed5903c5809a8e7dfbf83b0 Mon Sep 17 00:00:00 2001
From: "Eugeniy E. Mikhailov" <evgmik@gmail.com>
Date: Sat, 29 Aug 2020 22:58:58 -0400
Subject: allow to pass absolute topdir to subdirs targets

---
 subdirs.mk | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/subdirs.mk b/subdirs.mk
index a39b038..b742d75 100644
--- a/subdirs.mk
+++ b/subdirs.mk
@@ -2,6 +2,11 @@
 
 export dir_symbol += -
 
+USE_ABSOLUTE_TOPDIR ?= 0
+ifneq ($(USE_ABSOLUTE_TOPDIR),0)
+	TOPDIR_FOR_SUBDIR=$(shell pwd)
+endif
+
 nullstring :=
 space := $(nullstring) # keep it to assign space
 
@@ -9,6 +14,10 @@ subdirs: $(SUBDIRS)
 
 $(SUBDIRS):
 	echo $(subst $(space),,$(dir_symbol))'|' $@ $(MAKECMDGOALS)
+ifeq ($(USE_ABSOLUTE_TOPDIR),0)
 	$(MAKE) -C $@ $(MAKECMDGOALS)
+else
+	TOPDIR="$(TOPDIR_FOR_SUBDIR)" $(MAKE) -C $@ $(MAKECMDGOALS)
+endif
 
 .PHONY: $(SUBDIRS)
-- 
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