configure

#!/bin/sh
set -e

PREFIX=$PWD/local
CUDA_HOME=/usr/local/cuda

BUILD_EXAMPLES=0
BUILD_CUDA_EXAMPLES=0
BUILD_TESTS=0
BUILD_BENCHMARKS=0
VERBOSE=0

parse_args() {
    for i in "$@"; do
        case $i in
        --prefix=*)
            PREFIX="${i#*=}"
            ;;
        --examples)
            BUILD_EXAMPLES=1
            ;;
        --cuda-examples)
            BUILD_CUDA_EXAMPLES=1
            ;;
        --tests)
            BUILD_TESTS=1
            ;;
        --benchmarks)
            BUILD_BENCHMARKS=1
            ;;
        --deb)
            BUILD_DEB=1
            ;;
        --verbose)
            VERBOSE=1
            ;;
        *)
            echo "unknown argument $i"
            exit 1
            ;;
        esac
    done
}

CMAKE_FLAGS=

add_cmake_flag() {
    echo "Using $1=$2"
    CMAKE_FLAGS="$CMAKE_FLAGS -D$1=$2"
}

add_cmake_flags() {
    add_cmake_flag CMAKE_INSTALL_PREFIX ${PREFIX}
    add_cmake_flag CMAKE_BUILD_TYPE Release
    add_cmake_flag CMAKE_EXPORT_COMPILE_COMMANDS ${VERBOSE}
    add_cmake_flag CMAKE_VERBOSE_MAKEFILE ${VERBOSE}

    add_cmake_flag BUILD_BENCHMARKS ${BUILD_BENCHMARKS}
    add_cmake_flag BUILD_CUDA_EXAMPLES ${BUILD_CUDA_EXAMPLES}
    add_cmake_flag BUILD_EXAMPLES ${BUILD_EXAMPLES}
    add_cmake_flag BUILD_TESTS ${BUILD_TESTS}

    if [ "$BUILD_DEB" = 1 ]; then
        add_cmake_flag BUILD_DEB $BUILD_DEB
    fi
    if [ ${BUILD_CUDA_EXAMPLES} -eq 1 ]; then
        add_cmake_flag CMAKE_CUDA_COMPILER $CUDA_HOME/bin/nvcc
        add_cmake_flag CUDA_TOOLKIT_ROOT_DIR $CUDA_HOME
    fi
    if [ ! -z ${GTEST_GIT_URL} ]; then
        add_cmake_flag GTEST_GIT_URL ${GTEST_GIT_URL}
    fi
}

build='.build'

gen_make() {
    echo "build:"
    echo "\t\$(MAKE) -C $build"
    echo "install: build"
    echo "\t\$(MAKE) -C $build install"
    echo "%:"
    echo "\t\$(MAKE) -C $build \$@"
}

W=$PWD
parse_args $@
add_cmake_flags
mkdir -p $build
cd $build
cmake $W ${CMAKE_FLAGS}
gen_make >$W/Makefile