From 36bcc50d067d47f5be9b5de7480a22baadf5af7e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Villemot?= <sebastien@dynare.org>
Date: Thu, 7 Jan 2021 18:33:10 +0100
Subject: [PATCH] More robust way of finding the absolute path to FlexLexer.h

Ref. #575

(cherry picked from commit 6efad1447f8b3188674a2ae0846346ebbd86c653)
---
 configure.ac | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 701e14d9..cd95f7da 100644
--- a/configure.ac
+++ b/configure.ac
@@ -55,8 +55,7 @@ AM_PROG_AR
 
 AM_PROG_LEX
 # Hack to get lex include dir, ticket #575
-AC_PATH_PROG([LEXPATH], [$LEX])
-AC_SUBST([LEXINC], [$(eval "echo $LEXPATH | sed 's|\(.*\)$LEX$|\1../include|'")])
+AC_SUBST([LEXINC], [$(echo "$(dirname "$(which $LEX)")"/../include)])
 
 AC_CHECK_PROG([YACC], [bison], [bison])
 if test -z "$YACC"; then
-- 
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