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-rw-r--r--regen_perly.pl4
1 files changed, 4 insertions, 0 deletions
diff --git a/regen_perly.pl b/regen_perly.pl
index 859495faf1..a988a631f6 100644
--- a/regen_perly.pl
+++ b/regen_perly.pl
@@ -66,6 +66,10 @@ die "$0: must be run on an ASCII system\n" unless ord 'A' == 65;
# the test below to allow that version too. DAPM Feb 04.
my $version = `$bison -V`;
+unless ($version) { die <<EOF; }
+Could not find a version of bison in your path. Please install bison.
+EOF
+
unless ($version =~ /\b(1\.875[a-z]?|2\.[0134])\b/) { die <<EOF; }
You have the wrong version of bison in your path; currently 1.875