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#!/bin/sh
#
# %CopyrightBegin%
#
# Copyright Ericsson AB 2010. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions 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 $erl_top
cat > cross_check_erl.erl <<\EOF
%
% Copyright Ericsson AB 2010. All Rights Reserved.
%
% Licensed under the Apache License, Version 2.0 (the "License");
% you may not use this file except in compliance with the License.
% You may obtain a copy of the License at
%
% http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS,
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
% See the License for the specific language governing permissions and
% limitations under the License.
%
-module(cross_check_erl).
-export([start/0]).
start() ->
OTP = case catch erlang:system_info(otp_release) of
{'EXIT', _} -> "OTP";
Rel -> "OTP-" ++ Rel
end,
io:format("~s~n", [OTP]),
init:stop().
EOF
erlc cross_check_erl.erl 2>/dev/null \
&& used_otp=`erl -noshell -noinput -boot start_clean -pa . -run cross_check_erl 2>/dev/null`
res=$?
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
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