build: IS_TTY is now set according to GNU Make's MAKE_TERMOUT

[openwrt/staging/chunkeey.git] / include / toplevel.mk

diff --git a/include/toplevel.mk b/include/toplevel.mk
index 744695b19c9fc8f899f197392ebe2abb11ae6a76..48ea44aa2480ad2d80ca1dc2d45cf8a8193a109d 100644 (file)
--- a/include/toplevel.mk
+++ b/include/toplevel.mk
@@ -4,7 +4,7 @@
 
 PREP_MK= OPENWRT_BUILD= QUIET=0
 
-export IS_TTY=$(shell tty -s && echo 1 || echo 0)
+export IS_TTY=$(if $(MAKE_TERMOUT),1,0)
 
 include $(TOPDIR)/include/verbose.mk