From aac36d153aa88d666a2a6a7a4a49520e3aec7c17 Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Wed, 8 Aug 2018 11:17:36 +0200
Subject: posix: Add configure check for mprotect()

Update #3491.
---
 cpukit/configure.ac         | 10 ++++++++++
 cpukit/posix/src/mprotect.c |  4 ++++
 2 files changed, 14 insertions(+)

diff --git a/cpukit/configure.ac b/cpukit/configure.ac
index 17c47f445e..1809973afe 100644
--- a/cpukit/configure.ac
+++ b/cpukit/configure.ac
@@ -116,6 +116,16 @@ RTEMS_CHECK_FUNC([pthread_getattr_np],[
   #include <pthread.h>])
 
 AC_LANG_PUSH(C)
+AC_MSG_CHECKING([for mprotect(const void *, ...)])
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([
+#include <sys/mman.h>
+int mprotect(const void *, size_t, int);
+])],[
+AC_MSG_RESULT([yes])
+AC_DEFINE(HAVE_MPROTECT_CONST, [], [mprotect(const void *, ...)])
+],[
+AC_MSG_RESULT([no])
+])
 AC_MSG_CHECKING([for pthread_mutex_getprioceiling(const pthread_mutex_t *, ...)])
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
 #include <pthread.h>
diff --git a/cpukit/posix/src/mprotect.c b/cpukit/posix/src/mprotect.c
index 13017ce27c..76647c2700 100644
--- a/cpukit/posix/src/mprotect.c
+++ b/cpukit/posix/src/mprotect.c
@@ -31,7 +31,11 @@
 #include <sys/mman.h>
 
 int mprotect(
+#ifdef HAVE_MPROTECT_CONST
   const void *addr,
+#else
+  void *addr,
+#endif
   size_t len,
   int prot
 )
-- 
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