build system: fix lexinc path by replacing the last instance of 'flex'

04989822 · Houtan Bastani · f471105a · 04989822
Commit 04989822 authored Mar 09, 2016 by Houtan Bastani
--- a/configure.ac
+++ b/configure.ac
@@ -64,7 +64,7 @@ AC_PROG_MKDIR_P
 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$|../include|'"`])
+AC_SUBST([LEXINC], [`eval "echo $LEXPATH | sed 's|\(.*\)$LEX$|\1../include|'"`])

 AC_CHECK_PROG([YACC], [bison], [bison])
 if test "x$YACC" = "x"; then