doc: Install bison to support kconfig
Current kconfig-frontends is not supporting byacc anymore.
Observed issue using byacc (20140715-1):
kconfig-frontends/kconfig-frontends/libs/parser/yconf.y", syntax error
%destructor {
Problem has been solved on Ubuntu 16.04.2 (x86_64)
using bison-2:3.0.4.dfsg-1 instead.
@@ -78,9 +78,9 @@ Please keep in mind that we are actively working on board configurations, and wi
## APPENDIX
### Kconfig-frontends Installation
-1. The *byacc*, *flex*, *gperf* and *libncurses5-dev* packages should be installed.
+1. The *bison* (or byacc if supported), *flex*, *gperf* and *libncurses5-dev* packages should be installed:
```bash
-sudo apt-get install byacc flex gperf libncurses5-dev
+sudo apt-get install bison flex gperf libncurses5-dev
```
2. Download and untar *kconfig-frontends* package.
