OTP-8323 Cross compilation improvements and other build system

          improvements.

          Most notable:

          Lots of cross compilation improvements. The old cross compilation
          support was more or less non-existing as well as broken. Please,
          note that the cross compilation support should still be
          considered as experimental. Also note that old cross compilation
          configurations cannot be used without modifications. For more
          information on cross compiling Erlang/OTP see the
          $ERL_TOP/xcomp/README file.

          Support for staged install using <url
          href="http://www.gnu.org/prep/standards/html_node/DESTDIR.html">D
          ESTDIR</url>. The old broken INSTALL_PREFIX has also been fixed.
          For more information see the $ERL_TOP/README file.

          Documentation of the release target of the top Makefile. For more
          information see the $ERL_TOP/README file.

          make install now by default creates relative symbolic links
          instead of absolute ones. For more information see the
          $ERL_TOP/README file.

          $ERL_TOP/configure --help=recursive now works and prints help for
          all applications with configure scripts.

          Doing make install, or make release directly after make all no
          longer triggers miscellaneous rebuilds.

          Existing bootstrap system is now used when doing make install, or
          make release without a preceding make all.

          The crypto and ssl applications use the same runtime library path
          when dynamically linking against libssl.so and libcrypto.so. The
          runtime library search path has also been extended.

          The configure scripts of erl_interface and odbc now search for
          thread libraries and thread library quirks the same way as erts
          do.

          The configure script of the odbc application now also looks for
          odbc libraries in lib64 and lib/64 directories when building on a
          64-bit system.

          The config.h.in file in the erl_interface application is now
          automatically generated in instead of statically updated which
          reduces the risk of configure tests without any effect.

1 files changed, 147 insertions, 0 deletions

diff --git a/make/cross_check_erl b/make/cross_check_erl
new file mode 100755
index 0000000000..cb9dadfb32
--- /dev/null
+++ b/make/cross_check_erl
@@ -0,0 +1,147 @@
+#!/bin/sh
+#
+# %CopyrightBegin%
+#
+# Copyright Ericsson AB 2010. All Rights Reserved.
+#
+# The contents of this file are subject to the Erlang Public License,
+# Version 1.1, (the "License"); you may not use this file except in
+# compliance with the License. You should have received a copy of the
+# Erlang Public License along with this software. If not, it can be
+# retrieved online at http://www.erlang.org/.
+#
+# Software distributed under the License is distributed on an "AS IS"
+# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+# the License for the specific language governing rights and limitations
+# under the License.
+#
+# %CopyrightEnd%
+#
+# Author: Rickard Green
+#
+
+target=
+build_otp=
+erl_top=
+force=no
+
+while [ $# -gt 0 ]; do
+    case "$1" in
+	-target)
+	    shift
+	    test $# -gt 0 || { echo "$0: Missing target" 1>&2; exit 1; }
+	    target="$1";;
+	-otp)
+	    shift
+	    test $# -gt 0 || { echo "$0: Missing otp release" 1>&2; exit 1; }
+	    build_otp="$1";;
+	-erl_top)
+	    shift
+	    test $# -gt 0 || { echo "$0: Missing erl top" 1>&2; exit 1; }
+	    erl_top="$1";;
+	-force)
+	    shift
+	    test $# -gt 0 || { echo "$0: Missing force value" 1>&2; exit 1; }
+	    force=$1;;
+	*)
+	    echo "$0: Bad argument: $1" 1>&2
+	    exit 1;;
+    esac
+    shift
+done
+
+test "X$target" != "X" || { echo "$0: Missing target" 1>&2; exit 1; }
+test "X$build_otp" != "X" || { echo "$0: Missing otp release" 1>&2; exit 1; }
+test "X$erl_top" != "X" || { echo "$0: Missing erl top" 1>&2; exit 1; }
+test "X$force" != "X" || { echo "$0: Missing force value" 1>&2; exit 1; }
+
+cd $erl_top
+
+cat > cross_check_erl.erl <<\EOF
+%
+% Copyright Ericsson AB 2010. All Rights Reserved.
+% 
+% The contents of this file are subject to the Erlang Public License,
+% Version 1.1, (the "License"); you may not use this file except in
+% compliance with the License. You should have received a copy of the
+% Erlang Public License along with this software. If not, it can be
+% retrieved online at http://www.erlang.org/.
+% 
+% Software distributed under the License is distributed on an "AS IS"
+% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+% the License for the specific language governing rights and limitations
+% under the License.
+%
+
+-module(cross_check_erl).
+
+-export([start/0]).
+
+start() ->
+    OTP = case catch erlang:system_info(otp_release) of
+	      {'EXIT', _} -> "OTP";
+	      Rel -> "OTP-" ++ Rel
+	  end,
+    io:format("~s~n", [OTP]),
+    init:stop().
+
+EOF
+
+erlc cross_check_erl.erl 2>/dev/null \
+  && used_otp=`erl -noshell -noinput -pa . -run cross_check_erl 2>/dev/null`
+
+res=$?
+
+rm -f cross_check_erl.erl cross_check_erl.beam
+
+test $res -eq 0 || {
+    cat 1>&2 <<EOF
+* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+* ERROR:   No usable Erlang/OTP system for the build machine found! Cannot
+*          cross compile without such a system.
+*
+*          Either build a bootstrap system for the build machine, or provide
+*          an Erlang/$build_otp system in the \$PATH, and try again. For more
+*          information on cross compiling Erlang/$build_otp, see the
+*          \$ERL_TOP/xcomp/README file.
+* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+EOF
+    exit 1
+}
+
+test "X$build_otp" = "X$used_otp" || {
+    test $force = yes || {
+	cat 1>&2 <<EOF
+* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+* ERROR:   Trying to cross compile an Erlang/$build_otp system with a different
+*          Erlang/$used_otp system. When cross compiling you should compile
+*          with an Erlang/OTP system of the same release. It is possible,
+*          however not recomended, to force the cross compilation even though
+*          the wrong Erlang/OTP system is used. For more information on this,
+*          and cross compiling Erlang/$build_otp in general, see the
+*          \$ERL_TOP/xcomp/README file.
+* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+EOF
+	exit 1
+    }
+
+    cat <<EOF
+* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+* WARNING: Cross compiling an Erlang/$build_otp system with a different
+*          Erlang/$used_otp system. When cross compiling you should compile
+*          with an Erlang/OTP system of the same release. This build might
+*          fail, or silently produce suboptimal code. For more information on
+*          cross compiling Erlang/$build_otp, see the \$ERL_TOP/xcomp/README
+*          file.
+* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+
+EOF
+}
+
+cat <<EOF
+*
+* Cross compiling Erlang/$build_otp for: $target
+*
+EOF
+
+exit 0