php-src/ext/crack/config.m4

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PHP_ARG_WITH(crack, for CRACKlib support,
[  --with-crack[=DIR]      Include crack support.])

if test "$PHP_CRACK" != "no"; then

  for i in $PHP_CRACK/lib $PHP_CRACK/cracklib /usr/local/lib /usr/lib; do
    test -f $i/libcrack.$SHLIB_SUFFIX_NAME -o -f $i/libcrack.a && CRACK_LIBDIR=$i && break
  done

  if test -z "$CRACK_LIBDIR"; then
    AC_MSG_ERROR(Cannot find the cracklib library file)
  fi

  for i in $PHP_CRACK/include $PHP_CRACK/cracklib /usr/local/include /usr/include; do
    test -f $i/packer.h && CRACK_INCLUDEDIR=$i && break
  done
  
  if test -z "$CRACK_INCLUDEDIR"; then
    AC_MSG_ERROR(Cannot find a cracklib header file)
  fi

  PHP_ADD_INCLUDE($CRACK_INCLUDEDIR)
  PHP_ADD_LIBRARY_WITH_PATH(crack, $CRACK_LIBDIR, CRACK_SHARED_LIBADD)

  PHP_NEW_EXTENSION(crack, crack.c, $ext_shared)
  PHP_SUBST(CRACK_SHARED_LIBADD)
  AC_DEFINE(HAVE_CRACK, 1, [ ])
fi