configure.ac: fail if flex is not found

We use the same mechanism in PCSC 3f89340785934785cf1490d3e788eefb25c50a69
LudovicRousseau · Mar 2, 2023 · eec7cdf · eec7cdf
1 parent 5469f5c
commit eec7cdf
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/configure.ac b/configure.ac
@@ -32,7 +32,11 @@ AC_PROG_CPP
 AC_PROG_INSTALL
 AC_PROG_MAKE_SET
 AC_PROG_LN_S
-AM_PROG_LEX
+AC_PROG_LEX([noyywrap])
+if test $LEX = ":"
+then
+ AC_MSG_ERROR([no lex or flex found])
+fi
 AM_PROG_AR
 PKG_PROG_PKG_CONFIG