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Filename : debtoolchainfilegen
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#!/bin/sh

#
# Copyright 2018 Helmut Grohne <helmut@subdivi.de>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
# THE POSSIBILITY OF SUCH DAMAGE.
#
# Usage: pass the host architecture as a parameter:
#
#  ./debtoolchainfilegen armhf > cmake_toolchain_armhf.cmake

if [ -z "$1" ]
then
  echo "Usage: debtoolchainfilegen (arch) > cmake_toolchain_<arch>.cmake"
  exit 1
fi

ARCH=$1

DEB_HOST_GNU_TYPE=$(dpkg-architecture -f "-a$1" -qDEB_HOST_GNU_TYPE)
DEB_HOST_GNU_CPU=$(dpkg-architecture -f "-a$1" -qDEB_HOST_GNU_CPU)
case "$(dpkg-architecture -f "-a$1" -qDEB_HOST_ARCH_OS)" in
        linux) system_name=Linux; ;;
        hurd) system_name=GNU; ;;
        *) exit 1; ;;
esac

cat <<EOF
# Use it while calling CMake:
#   mkdir build; cd build
#   cmake -DCMAKE_TOOLCHAIN_FILE="/path/to/cmake_toolchain_<arch>.cmake" ../
#
set(CMAKE_SYSTEM_NAME "$system_name")
set(CMAKE_SYSTEM_PROCESSOR "$DEB_HOST_GNU_CPU")
set(CMAKE_C_COMPILER "$DEB_HOST_GNU_TYPE-gcc")
set(CMAKE_CXX_COMPILER "$DEB_HOST_GNU_TYPE-g++")
set(PKG_CONFIG_EXECUTABLE "$DEB_HOST_GNU_TYPE-pkg-config")
set(PKGCONFIG_EXECUTABLE "$DEB_HOST_GNU_TYPE-pkg-config")
set(QMAKE_EXECUTABLE "$DEB_HOST_GNU_TYPE-qmake")
EOF