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configure: fix macports flex version detection 

Macports add extra information after version itself:

$flex --version
flex 2.5.35 Apple(flex-31)

We require at least felx 2.5.35 so do not need to care about prehistoric
"flex version n.n.n"; just use second field always.

Reported by Peter Cheung <mcheung63@hotmail.com>
This commit is contained in:
Andrei Borzenkov 2015-11-27 19:42:23 +03:00
parent d43a5ee651
commit a261842785
1 changed files with 1 additions and 1 deletions
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2
configure.ac
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@ -315,7 +315,7 @@ AC_PROG_LN_S
if test "x$LEX" = "x:"; then
AC_MSG_ERROR([flex is not found])
else
version=`$LEX --version | $AWK '{ split($NF,x,"."); print x[[1]]*10000+x[[2]]*100+x[[3]]; }'`
version=`$LEX --version | $AWK '{ split($2,x,"."); print x[[1]]*10000+x[[2]]*100+x[[3]]; }'`
if test -n "$version" -a "$version" -ge 20535; then
:
else