configure

#!/bin/sh

add_inc()
{
    echo "#define $1" >> config.h
}

note()
{
    echo -n "Looking for $@...  "
    echo    "Looking for $@...  " >&3
}

case $1 in
    -*)
	echo "No help nor options available. Just run ./configure"
	exit 0;
	;;
esac

exec 3> config.log

note 'internal arc4random'
cat << EOF > testfile.c
#include <stdlib.h>
int main(void)
{arc4random();return 0;}
EOF
if gcc testfile.c -o /dev/null 2>&3; then
    echo Found.
    extraflags="$extraflags -DHAVE_ARC4RANDOM"
else
    echo Not Found.
    note 'external arc4random'
    cat << EOF > testfile.c
#include <bsd/stdlib.h>
int main(void)
{uint32_t arc4random(void);return 0;}
EOF
    if gcc -lbsd testfile.c -o /dev/null 2>&3; then
	echo Found.
	extraflags="$extraflags -DHAVE_ARC4RANDOM_EXT"
	extralibs="$extralibs -lbsd"
    else
	echo Not Found.
    fi
fi

rm testfile.c

sed -e "s|@extraflags@|$extraflags|" \
    -e "s|@extralibs@|$extralibs|" \
    Makefile.in > Makefile

echo "OK, now run \`make'."