kernel: install flex and bison

Kconfig lexer and parser are built from real .l and .y since 4.16.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/kernel/build/setup b/kernel/build/setup
index 9c4a0683b7093affbb760d2d99690d0c493d44a8..c3dc1c625b00f4190b4fd091cdcc189da97c82fe 100644 (file)
--- a/kernel/build/setup
+++ b/kernel/build/setup
@@ -32,11 +32,13 @@ export LC_ALL=C # the following is vulnerable to i18n
 if test -f /etc/redhat-release ; then
     $SUDO yum install -y redhat-lsb-core
     $SUDO yum install -y elfutils-libelf-devel  # for ORC unwinder
+    $SUDO yum install -y flex bison  # for Kconfig
 fi
 
 if which apt-get > /dev/null ; then
     $SUDO apt-get install -y lsb-release
     $SUDO apt-get install -y libelf-dev  # for ORC unwinder
+    $SUDO apt-get install -y flex bison  # for Kconfig
 fi
 
 case $(lsb_release -si) in