configure

#!/bin/sh


# some utility functions
isplatform()
{
    for p in $PLATFORM
    do
        if [ "$p" = "$1" ]; then
            return 0
        fi
    done
    return 1
}
notisplatform()
{
    for p in $PLATFORM
    do
        if [ "$p" = "$1" ]; then
            return 1
        fi
    done
    return 0
}
istoolchain()
{
    for t in $TOOLCHAIN
    do
        if [ "$t" = "$1" ]; then
            return 0
        fi
    done
    return 1
}
notistoolchain()
{
    for t in $TOOLCHAIN
    do
        if [ "$t" = "$1" ]; then
            return 1
        fi
    done
    return 0
}

# clean abort
abort_configure()
{
    rm -Rf "$TEMP_DIR"
    exit 1
}

# Test for availability of pkg-config
PKG_CONFIG=`command -v pkg-config`
: ${PKG_CONFIG:="false"}

# Simple uname based platform detection
# $PLATFORM is used for platform dependent dependency selection
OS=`uname -s`
OS_VERSION=`uname -r`
ARCH=`uname -m`
printf "detect platform... "
if [ "$OS" = "SunOS" ]; then
    PLATFORM="solaris sunos unix svr4"
elif [ "$OS" = "Linux" ]; then
    PLATFORM="linux unix"
elif [ "$OS" = "FreeBSD" ]; then
    PLATFORM="freebsd bsd unix"
elif [ "$OS" = "OpenBSD" ]; then
    PLATFORM="openbsd bsd unix"
elif [ "$OS" = "NetBSD" ]; then
    PLATFORM="netbsd bsd unix"
elif [ "$OS" = "Darwin" ]; then
    PLATFORM="macos osx bsd unix"
elif echo "$OS" | grep -i "MINGW" > /dev/null; then
    PLATFORM="windows mingw"
fi
: ${PLATFORM:="unix"}

PLATFORM_NAME=`echo "$PLATFORM" | cut -f1 -d' ' -`
echo "$PLATFORM_NAME"


# help text
printhelp()
{
    echo "Usage: $0 [OPTIONS]..."
    echo 'Configuration:'
if true \
      ; then
    :
    if test -z "$prefix__described__"; then
        prefix__described__=1
        cat << '__EOF__'
  --prefix                path prefix for architecture-independent files [/usr]
__EOF__
    fi
    if test -z "$exec_prefix__described__"; then
        exec_prefix__described__=1
        cat << '__EOF__'
  --exec-prefix           path prefix for architecture-dependent files [PREFIX]
__EOF__
    fi
    if test -z "$libdir__described__"; then
        libdir__described__=1
        cat << '__EOF__'
  --libdir                object code libraries [EPREFIX/lib]
__EOF__
    fi
    if test -z "$includedir__described__"; then
        includedir__described__=1
        cat << '__EOF__'
  --includedir            C header files [PREFIX/include]
__EOF__
    fi
    if test -z "$DOXYGEN__described__"; then
        DOXYGEN__described__=1
        cat << '__EOF__'
  --doxygen               path of the Doxygen executable
__EOF__
    fi
fi
if true \
    && isplatform "bsd" \
      ; then
    :
fi
if true \
      && notisplatform "bsd" \
      ; then
    :
fi
    cat << '__EOF__'

Build Types:
  --debug                 add extra compile flags for debug builds
  --release               add extra compile flags for release builds

Optional Features:
  --enable-api-docs       run Doxygen during build
  --enable-coverage       test coverage with gcov
  --enable-asan           address sanitizer
  --disable-memrchr
  --disable-cxx-tests     the check-cxx makefile target
  --disable-szmul-builtin use custom implementation, instead

__EOF__
    abort_configure
}

# create temporary directory
TEMP_DIR=".tmp-`uname -n`"
rm -Rf "$TEMP_DIR"
if mkdir -p "$TEMP_DIR"; then
    :
else
    echo "Cannot create tmp dir $TEMP_DIR"
    echo "Abort"
    exit 1
fi
touch "$TEMP_DIR/options"
touch "$TEMP_DIR/features"

# config variables
if true \
      ; then
    :
    if test -z "$prefix__initialized__"; then
        prefix__initialized__=1
        prefix="/usr"
    fi
    if test -z "$exec_prefix__initialized__"; then
        exec_prefix__initialized__=1
        exec_prefix=""
    fi
    if test -z "$libdir__initialized__"; then
        libdir__initialized__=1
        libdir=""
    fi
    if test -z "$includedir__initialized__"; then
        includedir__initialized__=1
        includedir=""
    fi
    if test -z "$VERSION__initialized__"; then
        VERSION__initialized__=1
        VERSION="3.2.0"
    fi
    if test -z "$LIBVERSION__initialized__"; then
        LIBVERSION__initialized__=1
        LIBVERSION="6.0.0"
    fi
    if test -z "$LIBVERSION_MAJOR__initialized__"; then
        LIBVERSION_MAJOR__initialized__=1
        LIBVERSION_MAJOR="6"
    fi
    if test -z "$root_dir__initialized__"; then
        root_dir__initialized__=1
        root_dir=`pwd`
    fi
    if test -z "$build_dir__initialized__"; then
        build_dir__initialized__=1
        build_dir="\${root_dir}/build"
    fi
    if test -z "$docs_dir__initialized__"; then
        docs_dir__initialized__=1
        docs_dir="\${root_dir}/build/docs"
    fi
    if test -z "$dist_dir__initialized__"; then
        dist_dir__initialized__=1
        dist_dir="\${root_dir}/dist"
    fi
    if test -z "$DOXYGEN__initialized__"; then
        DOXYGEN__initialized__=1
        DOXYGEN=`command -v doxygen`
    fi
    if test -z "$MKDIR__initialized__"; then
        MKDIR__initialized__=1
        MKDIR="/bin/mkdir -p"
    fi
    if test -z "$RMFILE__initialized__"; then
        RMFILE__initialized__=1
        RMFILE="/bin/rm -f"
    fi
    if test -z "$RMDIR__initialized__"; then
        RMDIR__initialized__=1
        RMDIR="/bin/rm -f -R"
    fi
    if test -z "$COPYFILE__initialized__"; then
        COPYFILE__initialized__=1
        COPYFILE="/bin/cp -f"
    fi
    if test -z "$COPYALL__initialized__"; then
        COPYALL__initialized__=1
        COPYALL="/bin/cp -f -R"
    fi
    if test -z "$SYMLINK__initialized__"; then
        SYMLINK__initialized__=1
        SYMLINK="/bin/ln -s"
    fi
fi
if true \
    && isplatform "bsd" \
      ; then
    :
    if test -z "$pkgconfigdir__initialized__"; then
        pkgconfigdir__initialized__=1
        pkgconfigdir="\${exec_prefix}/libdata/pkgconfig"
    fi
fi
if true \
      && notisplatform "bsd" \
      ; then
    :
    if test -z "$pkgconfigdir__initialized__"; then
        pkgconfigdir__initialized__=1
        pkgconfigdir="\${libdir}/pkgconfig"
    fi
fi

# features
FEATURE_MEMRCHR=auto
FEATURE_CXX_TESTS=auto
FEATURE_SZMUL_BUILTIN=auto

#
# parse arguments
#
BUILD_TYPE="default"
for ARG in "$@"
do
    case "$ARG" in
        "--prefix="*) prefix=${ARG#--prefix=} ;;
        "--exec-prefix="*) exec_prefix=${ARG#--exec-prefix=} ;;
        "--libdir="*) libdir=${ARG#--libdir=} ;;
        "--includedir="*) includedir=${ARG#--includedir=} ;;
        "--doxygen="*) DOXYGEN=${ARG#--doxygen=} ;;
        "--help"*) printhelp ;;
        "--debug") BUILD_TYPE="debug" ;;
        "--release") BUILD_TYPE="release" ;;
        "--enable-api-docs") FEATURE_API_DOCS=on ;;
        "--disable-api-docs") unset FEATURE_API_DOCS ;;
        "--enable-coverage") FEATURE_COVERAGE=on ;;
        "--disable-coverage") unset FEATURE_COVERAGE ;;
        "--enable-asan") FEATURE_ASAN=on ;;
        "--disable-asan") unset FEATURE_ASAN ;;
        "--enable-memrchr") FEATURE_MEMRCHR=on ;;
        "--disable-memrchr") unset FEATURE_MEMRCHR ;;
        "--enable-cxx-tests") FEATURE_CXX_TESTS=on ;;
        "--disable-cxx-tests") unset FEATURE_CXX_TESTS ;;
        "--enable-szmul-builtin") FEATURE_SZMUL_BUILTIN=on ;;
        "--disable-szmul-builtin") unset FEATURE_SZMUL_BUILTIN ;;
        "-"*) echo "unknown option: $ARG"; abort_configure ;;
    esac
done

# toolchain detection utilities
. make/toolchain.sh

# check languages
lang_c=
lang_cpp=
if detect_cpp_compiler ; then
    lang_cpp=1
fi
if detect_c_compiler ; then
    lang_c=1
fi


# set defaults for dir variables
: ${exec_prefix:="$prefix"}
: ${bindir:='${exec_prefix}/bin'}
: ${sbindir:='${exec_prefix}/sbin'}
: ${libdir:='${exec_prefix}/lib'}
: ${libexecdir:='${exec_prefix}/libexec'}
: ${datarootdir:='${prefix}/share'}
: ${datadir:='${datarootdir}'}
: ${sharedstatedir:='${prefix}/com'}
if [ -z "$sysconfdir" ]; then
    if [ "$prefix" = '/usr' ]; then
        sysconfdir='/etc'
    else
        sysconfdir='${prefix}/etc'
    fi
fi
if [ -z "$localstatedir" ]; then
    if [ "$prefix" = '/usr' ]; then
        localstatedir='/var'
    else
        localstatedir='${prefix}/var'
    fi
fi
if [ -z "$runstatedir" ]; then
    if [ "$prefix" = '/usr' ]; then
        runstatedir='/var/run'
    else
        runstatedir='${prefix}/var'
    fi
fi
: ${includedir:='${prefix}/include'}
: ${infodir:='${datarootdir}/info'}
: ${mandir:='${datarootdir}/man'}
: ${localedir:='${datarootdir}/locale'}


# check if a config.site exists and load it
CONFIG_SITE_OK=0
if [ -n "$CONFIG_SITE" ]; then
    # CONFIG_SITE may contain space separated file names
    for cs in $CONFIG_SITE; do
        printf "loading defaults from $cs... "
        if [ -f "$cs" ]; then
            . "$cs"
            echo ok
            CONFIG_SITE_OK=1
            break
        else
            echo "not found"
        fi
    done
elif [ -f "$prefix/share/config.site" ]; then
    printf "loading site defaults... "
    . "$prefix/share/config.site"
    echo ok
    CONFIG_SITE_OK=1
elif [ -f "$prefix/etc/config.site" ]; then
    printf "loading site defaults... "
    . "$prefix/etc/config.site"
    echo ok
    CONFIG_SITE_OK=1
fi

if [ $CONFIG_SITE_OK -eq 0 ]; then
    # try to detect the correct libdir on our own, except it was changed by the user
    if [ "$libdir" = '${exec_prefix}/lib' ] ; then
        if [ "$TOOLCHAIN_WSIZE" = "64" ] ; then
            if [ "$OS" = "SunOS" ]; then
                [ -d "${exec_prefix}/lib/64" ] && libdir='${exec_prefix}/lib/64'
            else
                [ -d "${exec_prefix}/lib64" ] && libdir='${exec_prefix}/lib64'
            fi
        elif [ "$TOOLCHAIN_WSIZE" = "32" ] ; then
            if [ "$OS" = "SunOS" ]; then
                [ -d "${exec_prefix}/lib/32" ] && libdir='${exec_prefix}/lib/32'
            else
                [ -d "${exec_prefix}/lib32" ] && libdir='${exec_prefix}/lib32'
            fi
        fi
    fi
fi


# generate vars.mk
cat > "$TEMP_DIR/vars.mk" << __EOF__
prefix=$prefix
exec_prefix=$exec_prefix
libdir=$libdir
includedir=$includedir
VERSION=$VERSION
LIBVERSION=$LIBVERSION
LIBVERSION_MAJOR=$LIBVERSION_MAJOR
root_dir=$root_dir
build_dir=$build_dir
docs_dir=$docs_dir
dist_dir=$dist_dir
DOXYGEN=$DOXYGEN
MKDIR=$MKDIR
RMFILE=$RMFILE
RMDIR=$RMDIR
COPYFILE=$COPYFILE
COPYALL=$COPYALL
SYMLINK=$SYMLINK
pkgconfigdir=$pkgconfigdir
__EOF__


#
# DEPENDENCIES
#


# create buffer for make variables required by dependencies
echo > "$TEMP_DIR/make.mk"

test_pkg_config()
{
    if "$PKG_CONFIG" --exists "$1" ; then :
    else return 1 ; fi
    if [ -z "$2" ] || "$PKG_CONFIG" --atleast-version="$2" "$1" ; then :
    else return 1 ; fi
    if [ -z "$3" ] || "$PKG_CONFIG" --exact-version="$3" "$1" ; then :
    else return 1 ; fi
    if [ -z "$4" ] || "$PKG_CONFIG" --max-version="$4" "$1" ; then :
    else return 1 ; fi
    return 0
}

print_check_msg()
{
    if [ -z "$1" ]; then
        shift
        printf "$@"
    fi
}

dependency_error_coverage()
{
    print_check_msg "$dep_checked_coverage" "checking for coverage... "
    # dependency coverage toolchain="gcc"
    while true
    do
        if notistoolchain "gcc"; then
            break
        fi
        if command -v gcovr > /dev/null 2>&1 ; then
            :
        else
            break
        fi
        TEMP_CFLAGS="$TEMP_CFLAGS \${COVERAGE_CFLAGS}"
        TEMP_LDFLAGS="$TEMP_LDFLAGS \${COVERAGE_LDFLAGS}"
        print_check_msg "$dep_checked_coverage" "yes\n"
        dep_checked_coverage=1
        return 1
    done

    print_check_msg "$dep_checked_coverage" "no\n"
    dep_checked_coverage=1
    return 0
}
dependency_error_asan()
{
    print_check_msg "$dep_checked_asan" "checking for asan... "
    # dependency asan toolchain="gnuc"
    while true
    do
        if notistoolchain "gnuc"; then
            break
        fi
        TEMP_CFLAGS="$TEMP_CFLAGS -fsanitize=address"
        TEMP_LDFLAGS="$TEMP_LDFLAGS -fsanitize=address"
        print_check_msg "$dep_checked_asan" "yes\n"
        dep_checked_asan=1
        return 1
    done

    print_check_msg "$dep_checked_asan" "no\n"
    dep_checked_asan=1
    return 0
}
dependency_error_cxx()
{
    print_check_msg "$dep_checked_cxx" "checking for cxx... "
    # dependency cxx
    while true
    do
        if [ -z "$lang_cpp" ] ; then
            break
        fi
        print_check_msg "$dep_checked_cxx" "yes\n"
        dep_checked_cxx=1
        return 1
    done

    print_check_msg "$dep_checked_cxx" "no\n"
    dep_checked_cxx=1
    return 0
}
dependency_error_memrchr()
{
    print_check_msg "$dep_checked_memrchr" "checking for memrchr... "
    # dependency memrchr
    while true
    do
        if $TOOLCHAIN_CC $CFLAGS -o /dev/null make/test_memrchr.c > /dev/null 2>&1 ; then
            :
        else
            break
        fi
        TEMP_CFLAGS="$TEMP_CFLAGS -DWITH_MEMRCHR"
        print_check_msg "$dep_checked_memrchr" "yes\n"
        dep_checked_memrchr=1
        return 1
    done

    # dependency memrchr
    while true
    do
        if $TOOLCHAIN_CC $CFLAGS -o /dev/null -D_GNU_SOURCE make/test_memrchr.c > /dev/null 2>&1 ; then
            :
        else
            break
        fi
        TEMP_CFLAGS="$TEMP_CFLAGS -DWITH_MEMRCHR -DMEMRCHR_NEED_GNU"
        print_check_msg "$dep_checked_memrchr" "yes\n"
        dep_checked_memrchr=1
        return 1
    done

    print_check_msg "$dep_checked_memrchr" "no\n"
    dep_checked_memrchr=1
    return 0
}
dependency_error_doxygen()
{
    print_check_msg "$dep_checked_doxygen" "checking for doxygen... "
    # dependency doxygen
    while true
    do
        if test -n "$DOXYGEN" > /dev/null 2>&1 ; then
            :
        else
            break
        fi
        print_check_msg "$dep_checked_doxygen" "yes\n"
        dep_checked_doxygen=1
        return 1
    done

    print_check_msg "$dep_checked_doxygen" "no\n"
    dep_checked_doxygen=1
    return 0
}
dependency_error_no_coverage()
{
    print_check_msg "$dep_checked_no_coverage" "checking for no_coverage... "
    # dependency no_coverage
    while true
    do
        if test -z "$FEATURE_COVERAGE" > /dev/null 2>&1 ; then
            :
        else
            break
        fi
        print_check_msg "$dep_checked_no_coverage" "yes\n"
        dep_checked_no_coverage=1
        return 1
    done

    print_check_msg "$dep_checked_no_coverage" "no\n"
    dep_checked_no_coverage=1
    return 0
}

# start collecting dependency information
echo > "$TEMP_DIR/flags.mk"

DEPENDENCIES_FAILED=
ERROR=0
# unnamed dependencies
TEMP_CFLAGS="$CFLAGS"
TEMP_CXXFLAGS="$CXXFLAGS"
TEMP_LDFLAGS="$LDFLAGS"
while true
do
    if notisplatform "macos"; then
        break
    fi
    while true
    do
        if [ -z "$lang_c" ] ; then
            ERROR=1
            break
        fi

        cat >> "$TEMP_DIR/make.mk" << __EOF__
AR=ar
ARFLAGS=r
STLIB_EXT=.a
SHLIB_EXT=.dylib

SHLIB_LDFLAGS=-dynamiclib -current_version \$(LIBVERSION) -compatibility_version \$(LIBVERSION)
INSTALL_LIB=\$(root_dir)/make/install-lib-macos.sh
__EOF__
        break
    done
    break
done
while true
do
    if notisplatform "unix"; then
        break
    fi
    if isplatform "macos" || istoolchain "macos"; then
        break
    fi
    while true
    do
        if [ -z "$lang_c" ] ; then
            ERROR=1
            break
        fi

        cat >> "$TEMP_DIR/make.mk" << __EOF__
AR=ar
ARFLAGS=cr
STLIB_EXT=.a
SHLIB_EXT=.so
INSTALL_LIB=\$(root_dir)/make/install-lib.sh
__EOF__
        break
    done
    break
done
while true
do
    if notistoolchain "gnuc"; then
        break
    fi
    if isplatform "macos" || istoolchain "macos"; then
        break
    fi
    while true
    do

        cat >> "$TEMP_DIR/make.mk" << __EOF__
SHLIB_LDFLAGS += -Wl,-soname,libucx\$(SHLIB_EXT).\$(LIBVERSION_MAJOR)
__EOF__
        break
    done
    break
done
while true
do
    if notistoolchain "suncc"; then
        break
    fi
    while true
    do

        cat >> "$TEMP_DIR/make.mk" << __EOF__
SHLIB_LDFLAGS += -h libucx\$(SHLIB_EXT).\$(LIBVERSION_MAJOR)
__EOF__
        break
    done
    break
done
while true
do
    if notisplatform "solaris"; then
        break
    fi
    while true
    do

        TEMP_LDFLAGS="$TEMP_LDFLAGS -lm"
        break
    done
    break
done

# build type
if [ "$BUILD_TYPE" = "debug" ]; then
    TEMP_CFLAGS="\${DEBUG_CFLAGS} $TEMP_CFLAGS"
    TEMP_CXXFLAGS="\${DEBUG_CXXFLAGS} $TEMP_CXXFLAGS"
fi
if [ "$BUILD_TYPE" = "release" ]; then
    TEMP_CFLAGS="\${RELEASE_CFLAGS} $TEMP_CFLAGS"
    TEMP_CXXFLAGS="\${RELEASE_CXXFLAGS} $TEMP_CXXFLAGS"
fi

# add general dependency flags to flags.mk
echo "# general flags" >> "$TEMP_DIR/flags.mk"
if [ -n "${TEMP_CFLAGS}" ] && [ -n "$lang_c" ]; then
    echo "CFLAGS += $TEMP_CFLAGS" >> "$TEMP_DIR/flags.mk"
fi
if [ -n "${TEMP_CXXFLAGS}" ] && [ -n "$lang_cpp" ]; then
    echo "CXXFLAGS += $TEMP_CXXFLAGS" >> "$TEMP_DIR/flags.mk"
fi
if [ -n "${TEMP_LDFLAGS}" ]; then
    echo "LDFLAGS += $TEMP_LDFLAGS" >> "$TEMP_DIR/flags.mk"
fi

#
# OPTION VALUES
#

#
# TARGETS
#

echo >> "$TEMP_DIR/flags.mk"
echo "configuring global target"
echo "# flags for unnamed target" >> "$TEMP_DIR/flags.mk"
TEMP_CFLAGS=
TEMP_CXXFLAGS=
TEMP_LDFLAGS=


# Features
if [ -n "$FEATURE_API_DOCS" ]; then
    # check dependency
    if dependency_error_doxygen ; then
        # "auto" features can fail and are just disabled in this case
        if [ "$FEATURE_API_DOCS" = "auto" ]; then
            DISABLE_FEATURE_API_DOCS=1
        else
            DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED doxygen "
            ERROR=1
        fi
    fi
    if [ -n "$DISABLE_FEATURE_API_DOCS" ]; then
        unset FEATURE_API_DOCS
    fi
fi
if [ -n "$FEATURE_API_DOCS" ]; then
    :
    cat >> "$TEMP_DIR/make.mk" << __EOF__
# Documentation
WITH_API_DOCS=yes
__EOF__
else
    :
fi
if [ -n "$FEATURE_COVERAGE" ]; then
    # check dependency
    if dependency_error_coverage ; then
        # "auto" features can fail and are just disabled in this case
        if [ "$FEATURE_COVERAGE" = "auto" ]; then
            DISABLE_FEATURE_COVERAGE=1
        else
            DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED coverage "
            ERROR=1
        fi
    fi
    if [ -n "$DISABLE_FEATURE_COVERAGE" ]; then
        unset FEATURE_COVERAGE
    fi
fi
if [ -n "$FEATURE_COVERAGE" ]; then
    :
else
    :
fi
if [ -n "$FEATURE_ASAN" ]; then
    # check dependency
    if dependency_error_asan ; then
        # "auto" features can fail and are just disabled in this case
        if [ "$FEATURE_ASAN" = "auto" ]; then
            DISABLE_FEATURE_ASAN=1
        else
            DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED asan "
            ERROR=1
        fi
    fi
    if [ -n "$DISABLE_FEATURE_ASAN" ]; then
        unset FEATURE_ASAN
    fi
fi
if [ -n "$FEATURE_ASAN" ]; then
    :
else
    :
fi
if [ -n "$FEATURE_MEMRCHR" ]; then
    # check dependency
    if dependency_error_memrchr ; then
        # "auto" features can fail and are just disabled in this case
        if [ "$FEATURE_MEMRCHR" = "auto" ]; then
            DISABLE_FEATURE_MEMRCHR=1
        else
            DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED memrchr "
            ERROR=1
        fi
    fi
    if [ -n "$DISABLE_FEATURE_MEMRCHR" ]; then
        unset FEATURE_MEMRCHR
    fi
fi
if [ -n "$FEATURE_MEMRCHR" ]; then
    :
else
    :
fi
if [ -n "$FEATURE_CXX_TESTS" ]; then
    # check dependency
    if dependency_error_cxx ; then
        # "auto" features can fail and are just disabled in this case
        if [ "$FEATURE_CXX_TESTS" = "auto" ]; then
            DISABLE_FEATURE_CXX_TESTS=1
        else
            DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED cxx "
            ERROR=1
        fi
    fi
    if [ -n "$DISABLE_FEATURE_CXX_TESTS" ]; then
        unset FEATURE_CXX_TESTS
    fi
fi
if [ -n "$FEATURE_CXX_TESTS" ]; then
    :
    cat >> "$TEMP_DIR/make.mk" << __EOF__
# Enable the check-cxx target
WITH_CXX_TEST=yes
__EOF__
else
    :
fi
if [ -n "$FEATURE_SZMUL_BUILTIN" ]; then
    # check dependency
    if dependency_error_no_coverage ; then
        # "auto" features can fail and are just disabled in this case
        if [ "$FEATURE_SZMUL_BUILTIN" = "auto" ]; then
            DISABLE_FEATURE_SZMUL_BUILTIN=1
        else
            DEPENDENCIES_FAILED="$DEPENDENCIES_FAILED no_coverage "
            ERROR=1
        fi
    fi
    if [ -n "$DISABLE_FEATURE_SZMUL_BUILTIN" ]; then
        unset FEATURE_SZMUL_BUILTIN
    fi
fi
if [ -n "$FEATURE_SZMUL_BUILTIN" ]; then
    :
else
    :
    TEMP_CFLAGS="$TEMP_CFLAGS -DCX_NO_SZMUL_BUILTIN"
    TEMP_CXXFLAGS="$TEMP_CXXFLAGS -DCX_NO_SZMUL_BUILTIN"
fi


if [ -n "${TEMP_CFLAGS}" ] && [ -n "$lang_c" ]; then
    echo "CFLAGS  += $TEMP_CFLAGS" >> "$TEMP_DIR/flags.mk"
fi
if [ -n "${TEMP_CXXFLAGS}" ] && [ -n "$lang_cpp" ]; then
    echo "CXXFLAGS  += $TEMP_CXXFLAGS" >> "$TEMP_DIR/flags.mk"
fi
if [ -n "${TEMP_LDFLAGS}" ]; then
    echo "LDFLAGS += $TEMP_LDFLAGS" >> "$TEMP_DIR/flags.mk"
fi


# final result
if [ $ERROR -ne 0 ]; then
    echo
    echo "Error: Unresolved dependencies"
    echo "$DEPENDENCIES_FAILED"
    abort_configure
fi

echo "configure finished"
echo
echo "Toolchain:"
echo "  name:           $TOOLCHAIN_NAME"
if [ -n "$TOOLCHAIN_CC" ]; then
    echo "  cc:             $TOOLCHAIN_CC"
fi
if [ -n "$TOOLCHAIN_CXX" ]; then
    echo "  cxx:            $TOOLCHAIN_CXX"
fi
if [ -n "$TOOLCHAIN_WSIZE" ]; then
    echo "  word size:      $TOOLCHAIN_WSIZE bit"
fi
if [ -n "$TOOLCHAIN_CSTD" ]; then
    echo "  default C std:  $TOOLCHAIN_CSTD"
fi
echo
echo "Config:"
    printf '  %-16s' 'prefix:'
    echo "$prefix"
    printf '  %-16s' 'exec-prefix:'
    echo "$exec_prefix"
    printf '  %-16s' 'libdir:'
    echo "$libdir"
    printf '  %-16s' 'includedir:'
    echo "$includedir"
    printf '  %-16s' 'doxygen:'
    echo "$DOXYGEN"
echo
echo "Features:"
printf '  %-16s' 'api-docs:'
if [ -n "$FEATURE_API_DOCS" ]; then
    echo 'on'
else
    echo 'off'
fi
printf '  %-16s' 'coverage:'
if [ -n "$FEATURE_COVERAGE" ]; then
    echo 'on'
else
    echo 'off'
fi
printf '  %-16s' 'asan:'
if [ -n "$FEATURE_ASAN" ]; then
    echo 'on'
else
    echo 'off'
fi
printf '  %-16s' 'memrchr:'
if [ -n "$FEATURE_MEMRCHR" ]; then
    echo 'on'
else
    echo 'off'
fi
printf '  %-16s' 'cxx-tests:'
if [ -n "$FEATURE_CXX_TESTS" ]; then
    echo 'on'
else
    echo 'off'
fi
printf '  %-16s' 'szmul-builtin:'
if [ -n "$FEATURE_SZMUL_BUILTIN" ]; then
    echo 'on'
else
    echo 'off'
fi
echo

# generate the config.mk file
pwd=`pwd`
cat > "$TEMP_DIR/config.mk" << __EOF__
#
# config.mk generated by:
# pwd: $pwd
# $0 $@
#

__EOF__
write_toolchain_defaults "$TEMP_DIR/toolchain.mk"
cat "$TEMP_DIR/config.mk" "$TEMP_DIR/vars.mk" "$TEMP_DIR/toolchain.mk" "$TEMP_DIR/flags.mk" "$TEMP_DIR/make.mk" > config.mk
rm -Rf "$TEMP_DIR"