[修改] export导出的变量的副本，子makefile修改变量不上层

2023-10-29 15:01:56 +08:00
2 changed files with 9 additions and 8 deletions
--- a/11
+++ b/11
@ -1,9 +1,8 @@

+var_a = a

-makedir := $(abspath $(lastword $(MAKEFILE_LIST)))
-$(warning makedir1=$(makedir))
-
-include dir1/Makefile
-makedir := $(abspath $(lastword $(MAKEFILE_LIST)))
-$(warning makedir3=$(makedir))
+export var_a 

+all:
+	make -C dir1
+	echo "Get var_a=$(var_a)"
--- a/dir1/Makefile
+++ b/dir1/Makefile
@ -1,6 +1,8 @@


-makedir := $(abspath $(lastword $(MAKEFILE_LIST)))
-$(warning makedir2=$(makedir))
+$(warning var_a=$(var_a))
+var_a = b

+all:
+	echo "set var_a=b"