Merge branch 'sverk/halfword-deprecate/OTP-11777'

* sverk/halfword-deprecate/OTP-11777:
  erts: Deprecate halfword emulator

2 files changed, 14 insertions, 4 deletions

diff --git a/configure.in b/configure.in
index f6cccb4f4b..be906dcb4e 100644
--- a/configure.in
+++ b/configure.in
@@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script.
 
 dnl %CopyrightBegin%
 dnl
-dnl Copyright Ericsson AB 1998-2012. All Rights Reserved.
+dnl Copyright Ericsson AB 1998-2014. All Rights Reserved.
 dnl
 dnl The contents of this file are subject to the Erlang Public License,
 dnl Version 1.1, (the "License"); you may not use this file except in
@@ -209,7 +209,7 @@ AS_HELP_STRING([--enable-dirty-schedulers], [enable dirty scheduler support]))
 
 AC_ARG_ENABLE(halfword-emulator,
 AS_HELP_STRING([--enable-halfword-emulator],
-               [enable halfword emulator (only for 64bit builds)]))
+               [enable halfword emulator (only for 64bit builds). Note: Halfword emulator is marked as deprecated and scheduled for removal in future major release.]))
 
 AC_ARG_ENABLE(smp-support,
 AS_HELP_STRING([--enable-smp-support], [enable smp support])
diff --git a/erts/configure.in b/erts/configure.in
index 6d5eca8966..208c294106 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script. -*-m4-*-
 
 dnl %CopyrightBegin%
 dnl
-dnl Copyright Ericsson AB 1997-2013. All Rights Reserved.
+dnl Copyright Ericsson AB 1997-2014. All Rights Reserved.
 dnl
 dnl The contents of this file are subject to the Erlang Public License,
 dnl Version 1.1, (the "License"); you may not use this file except in
@@ -144,7 +144,7 @@ AS_HELP_STRING([--enable-dirty-schedulers], [enable dirty scheduler support]),
 
 AC_ARG_ENABLE(halfword-emulator,
 AS_HELP_STRING([--enable-halfword-emulator],
-               [enable halfword emulator (only for 64bit builds)]),
+               [enable halfword emulator (only for 64bit builds). Note: Halfword emulator is marked as deprecated and scheduled for removal in future major release.]),
 [ case "$enableval" in
     no) enable_halfword_emualtor=no ;;
     *)  enable_halfword_emulator=yes ;;
@@ -816,6 +816,16 @@ if test "$enable_halfword_emulator" = "yes"; then
 			  [Define if building a halfword-heap 64bit emulator])
 		ENABLE_ALLOC_TYPE_VARS="$ENABLE_ALLOC_TYPE_VARS halfword"
 		AC_MSG_RESULT([yes])
+
+		test -f "$ERL_TOP/erts/CONF_INFO" ||
+		    echo "" > "$ERL_TOP/erts/CONF_INFO"
+		cat >> $ERL_TOP/erts/CONF_INFO <<EOF
+
+                 The HALFWORD emulator has been enabled.
+                 This is a DEPRECATED feature scheduled for removal
+                 in a future major release.
+
+EOF
 	else
 		AC_MSG_ERROR(no; halfword emulator not supported on this architecture)
 	fi