build: add a prereq check for file (#15692)

[openwrt.git] / include / prereq-build.mk

diff --git a/include/prereq-build.mk b/include/prereq-build.mk
index b7ada69..2e8d712 100644 (file)
--- a/include/prereq-build.mk
+++ b/include/prereq-build.mk
@@ -187,3 +187,7 @@ endef
 $(eval $(call Require,getopt-extended, \
        Please install an extended getopt version that supports --long \
 ))
+
+$(eval $(call RequireCommand,file, \
+       Please install file. \
+))