fix parallel build issues

[openwrt.git] / include / toplevel.mk

diff --git a/include/toplevel.mk b/include/toplevel.mk
index ba5cb33..7930223 100644 (file)
--- a/include/toplevel.mk
+++ b/include/toplevel.mk
@@ -22,6 +22,7 @@ else
   endif
 endif
 export OPENWRTVERSION
+export IS_TTY=$(shell tty -s && echo 1 || echo 0)
 
 ifeq ($(FORCE),)
   .config scripts/config/conf scripts/config/mconf: tmp/.prereq-build