add prereq check for extended getopt (#3944)

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@12491 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/include/prereq-build.mk b/include/prereq-build.mk
index fbe7d69f4483f1bcffe636c3adeb999e33cbec8d..d6d2d73a63c39549936e19f5e2e4c2920f2fbd55 100644 (file)
--- a/include/prereq-build.mk
+++ b/include/prereq-build.mk
@@ -134,3 +134,11 @@ endef
 $(eval $(call Require,gnu-find, \
        Please install GNU find \
 ))
+
+define Require/getopt-extended
+       getopt --long - - >/dev/null
+endef
+
+$(eval $(call Require,getopt-extended, \
+       Please install an extended getopt version that supports --long \
+))