From 03b00985c181f90a927b9af5316d27a534398c24 Mon Sep 17 00:00:00 2001
From: Sverker Eriksson <sverker@erlang.org>
Date: Thu, 7 Jan 2016 17:14:04 +0100
Subject: erts:  Add config test for MAP_NORESERVE for hipe on 64-bit

to get a nicer error on FreeBSD and others that does not support
MAP_NORESERVE for mmap.

Q: How to support this?
A: Implement the "literal tag" in hipe
   or another way to reserve virtual address space in erl_mmap.c
---
 erts/configure.in | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'erts')

diff --git a/erts/configure.in b/erts/configure.in
index 20075b08c9..2f19c0f760 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -2765,6 +2765,21 @@ LM_SYS_IPV6
 LM_SYS_MULTICAST
 ERL_TIME_CORRECTION
 AC_CHECK_PROG(M4, m4, m4)
+
+
+dnl HiPE cannot run on 64-bit without MAP_FIXED and MAP_NORESERVE
+if test X${enable_hipe} != Xno && test X$ac_cv_sizeof_void_p != X4; then
+   AC_CHECK_DECLS([MAP_FIXED, MAP_NORESERVE], [], [], [#include <sys/mman.h>])
+   if test X$ac_cv_have_decl_MAP_FIXED != Xyes || test X$ac_cv_have_decl_MAP_NORESERVE != Xyes; then
+      if test X${enable_hipe} = Xyes; then
+	 AC_MSG_ERROR([HiPE on 64-bit needs MAP_FIXED and MAP_NORESERVE flags for mmap()])
+      else
+	 enable_hipe=no
+	 AC_MSG_WARN([Disable HiPE due to lack of MAP_FIXED and MAP_NORESERVE flags for mmap()])
+      fi
+   fi
+fi
+
 dnl check to auto-enable hipe here...
 if test "$cross_compiling" != "yes" && test X${enable_hipe} != Xno; then
   if test -z "$M4"; then
-- 
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