#!/bin/sh
# Check ncurses compatibility

# What library to link
ldflags()
{
    for ext in so a dylib ; do
        for lib in ncursesw ncurses curses ; do
            $cc -print-file-name=lib${lib}.${ext} | grep -q /
            if [ $? -eq 0 ]; then
                echo "-l${lib}"
                exit
            fi
        done
    done
    exit 1
}

# Where is ncurses.h?
ccflags()
{
    if [ -f /usr/include/ncurses/ncurses.h ]; then
        echo '-I/usr/include/ncurses -DCURSES_LOC="<ncurses.h>"'
    elif [ -f /usr/include/ncurses/curses.h ]; then
        echo '-I/usr/include/ncurses -DCURSES_LOC="<ncurses/curses.h>"'
    elif [ -f /usr/include/ncursesw/curses.h ]; then
        echo '-I/usr/include/ncursesw -DCURSES_LOC="<ncursesw/curses.h>"'
    elif [ -f /usr/include/ncurses.h ]; then
        echo '-DCURSES_LOC="<ncurses.h>"'
    else
        echo '-DCURSES_LOC="<curses.h>"'
    fi
}

# Temp file, try to clean up after us
tmp=.lxdialog.tmp
trap "rm -f $tmp" 0 1 2 3 15

# Check if we can link to ncurses
check() {
    echo $cc
        $cc -xc - -o $tmp 2>/dev/null <<'EOF'
#include CURSES_LOC
int main() {}
EOF
    if [ $? != 0 ]; then
        echo " *** Unable to find the ncurses libraries or the"       1>&2
        echo " *** required header files."                            1>&2
        echo " *** 'make menuconfig' requires the ncurses libraries." 1>&2
        echo " *** "                                                  1>&2
        echo " *** Install ncurses (ncurses-devel) and try again."    1>&2
        echo " *** "                                                  1>&2
        exit 1
    fi
}

usage() {
    printf "Usage: $0 [-check compiler options|-ccflags|-ldflags compiler options]\n"
}

if [ $# -eq 0 ]; then
    usage
    exit 1
fi

cc=""
case "$1" in
    "-check")
        shift
        cc="$@"
        check
        ;;
    "-ccflags")
        ccflags
        ;;
    "-ldflags")
        shift
        cc="$@"
        ldflags
        ;;
    "*")
        usage
        exit 1
        ;;
esac
