- AC_CHECK_LIB([mbedtls], [havege_init], [], [AC_MSG_ERROR([could not find havege_init])])
+ AC_CHECK_HEADERS([mbedtls/havege.h], [], [AC_MSG_ERROR([could not find mbedtls/havege.h])])
+ AC_CHECK_LIB([mbedcrypto], [mbedtls_havege_init], [], [AC_MSG_ERROR([could not find mbedtls_havege_init])])