mk: fix external builds with relative output dir

In case the output directory (O=) is undefined or a relative directory lets
turn it into an absolute path before passing it on. Otherwise the output
directory is created relative to the subdir, e.g. pktgen/app/build/... and
pktgen/lib/lua/src/build/...

Signed-off-by: Jan Blunck <jblunck@infradead.org>

diff --git a/mk/rte.extsubdir.mk b/mk/rte.extsubdir.mk
index 3e733d8..d21791b 100644 (file)
--- a/mk/rte.extsubdir.mk
+++ b/mk/rte.extsubdir.mk
@@ -33,8 +33,8 @@ MAKEFLAGS += --no-print-directory
 ALL_DEPDIRS := $(patsubst DEPDIRS-%,%,$(filter DEPDIRS-%,$(.VARIABLES)))
 
 # output directory
-O ?= .
-BASE_OUTPUT ?= $(O)
+O ?= $(CURDIR)
+BASE_OUTPUT ?= $(abspath $(O))
 CUR_SUBDIR ?= .
 
 .PHONY: all