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

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40568 3c298f89-4303-0410-b956-a3cf2f4a3e73

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. \
+))