From e3881b465539afb06891bf30781c3403f281786e Mon Sep 17 00:00:00 2001
From: Aki Tuomi <cmouse@desteem.org>
Date: Fri, 22 Aug 2014 09:43:49 +0300
Subject: [PATCH] Check if ragel is missing but needed and fail

---
 configure.ac           | 2 +-
 m4/pdns_check_ragel.m4 | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)
 create mode 100644 m4/pdns_check_ragel.m4

diff --git a/configure.ac b/configure.ac
index c5c8ace5eb..342e2398b7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -56,7 +56,7 @@ eval full_libdir="\"$libdir\""
 # detect pkg-config explicitly
 PKG_PROG_PKG_CONFIG
 
-AC_CHECK_PROG([RAGEL], [ragel], [ragel])
+PDNS_CHECK_RAGEL
 AC_CHECK_PROG([ASCIIDOC], [asciidoc], [asciidoc])
 
 PDNS_WITH_LUA
diff --git a/m4/pdns_check_ragel.m4 b/m4/pdns_check_ragel.m4
new file mode 100644
index 0000000000..9a49823b01
--- /dev/null
+++ b/m4/pdns_check_ragel.m4
@@ -0,0 +1,8 @@
+AC_DEFUN([PDNS_CHECK_RAGEL], [
+  AC_CHECK_PROG([RAGEL], [ragel], [ragel])
+  if test "x$RAGEL" = "x"; then
+    if test ! -f "${srcdir}/pdns/dnslabeltext.cc"; then
+      AC_MSG_ERROR([ragel is missing and you don't have ${srcdir}/pdns/dnslabeltext.cc. Install ragel or download sources from www.powerdns.com])
+    fi
+  fi
+])
-- 
2.47.2