commit b50afc415a32cb01658a927c0412dd92d6fc7fa1
author Jens Axboe <axboe@fb.com> Mon Sep 29 16:44:31 2014 -0600
committer Mohamad Ayyash <mkayyash@google.com> Fri Mar 06 17:57:19 2015 -0800
tree cbfb183581423854ec2c97f6af66d79ffd35972b
parent c9a4996c2c4e609152d1de5d401e82bdf498587f

configure: fix for the cases where bison provides yacc

Signed-off-by: Jens Axboe <axboe@fb.com>

configure

diff --git a/configure b/configure
index 706edeb..1a456ff 100755
--- a/configure
+++ b/configure
@@ -1255,15 +1255,22 @@
 
 # Check if we have lex/yacc available
 yacc="no"
+yacc_is_bison="no"
 lex="no"
 arith="no"
-LEX=$(which lex)
+LEX=$(which lex 2> /dev/null)
 if test -x "$LEX" ; then
   lex="yes"
 fi
-YACC=$(which yacc)
+YACC=$(which yacc 2> /dev/null)
 if test -x "$YACC" ; then
   yacc="yes"
+else
+  YACC=$(which bison 2> /dev/null)
+  if test -x "$YACC" ; then
+    yacc="yes"
+    yacc_is_bison="yes"
+  fi
 fi
 if test "$yacc" = "yes" && test "$lex" = "yes" ; then
   arith="yes"
@@ -1435,6 +1442,11 @@
 fi
 if test "$arith" = "yes" ; then
   output_sym "CONFIG_ARITHMETIC"
+  if test "$yacc_is_bison" = "yes" ; then
+    echo "YACC=$YACC -y" >> $config_host_mak
+  else
+    echo "YACC=$YACC" >> $config_host_mak
+  fi
 fi
 
 if test "$zlib" = "no" ; then