+ AC_CHECK_HEADERS([polarssl/version.h], [], [AC_MSG_ERROR([could not find polarssl/version.h])])
+
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <polarssl/ssl.h>]],
+ [[#if defined(POLARSSL_ZLIB_SUPPORT)
+ int x;
+ #endif
+ x = 0;
+ return 0;]])],
+ [AC_CHECK_LIB([z], [deflate], [], [AC_MSG_ERROR([could not find zlib])])],
+ [])