From 8d89d86927f3631d6d8be8eacb30460daf13aa74 Mon Sep 17 00:00:00 2001
From: Misty De Meo <mistydemeo@github.com>
Date: Thu, 10 Jan 2019 14:39:14 +1100
Subject: [PATCH] configure: refuse to build with jemalloc when header is
 missing

---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index dc3bdf06c0..dec65d4e98 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1097,7 +1097,8 @@ AS_IF([test "x$with_jemalloc" != xno],[
     [test x$with_jemalloc = xyes && with_jemalloc=no])
   AC_CHECK_HEADER(jemalloc/jemalloc.h, [
     AC_DEFINE(RUBY_ALTERNATIVE_MALLOC_HEADER, [<jemalloc/jemalloc.h>])
-  ])
+  ], 
+  [test x$with_jemalloc = xyes && with_jemalloc=no])
   AS_IF([test "x$with_jemalloc" != xyes], [
     AC_CACHE_CHECK([for jemalloc with JEMALLOC_MANGLE], rb_cv_jemalloc_demangle,
       [AC_LINK_IFELSE([AC_LANG_PROGRAM([@%:@define JEMALLOC_MANGLE 1
-- 
2.20.1