AC_DEFUN([UNIFYFS_AC_LEVELDB], [

# preserve state of flags

LEVELDB_OLD_CFLAGS=$CFLAGS

LEVELDB_OLD_LDFLAGS=$LDFLAGS

AC_ARG_WITH([leveldb], [AC_HELP_STRING([--with-leveldb=PATH],

[path to installed libleveldb [default=/usr/local]])], [

LEVELDB_CFLAGS="-I${withval}/include"

LEVELDB_LDFLAGS="-L${withval}/lib -L${withval}/lib64"

CFLAGS="$CFLAGS ${LEVELDB_CFLAGS}"

LDFLAGS="$LDFLAGS ${LEVELDB_LDFLAGS}"

], [])

AC_CHECK_LIB([leveldb], [leveldb_open],

[LEVELDB_LIBS="-lleveldb"

AC_SUBST(LEVELDB_CFLAGS)

AC_SUBST(LEVELDB_LDFLAGS)

AC_SUBST(LEVELDB_LIBS)

],

[AC_MSG_ERROR([couldn't find a suitable libleveldb, use --with-leveldb=PATH])],

[]

)

# restore flags

CFLAGS=$LEVELDB_OLD_CFLAGS

LDFLAGS=$LEVELDB_OLD_LDFLAGS

])