php 7写个简单的扩展编译出错了，感觉是编译头不对，但是我都用了php7？

Question

写了个hello world扩展（照这篇文章：http://www.tuicool.com/articl...）：
say.c

/*
  +----------------------------------------------------------------------+
  | PHP Version 7                                                        |
  +----------------------------------------------------------------------+
  | Copyright (c) 1997-2016 The PHP Group                                |
  +----------------------------------------------------------------------+
  | This source file is subject to version 3.01 of the PHP license,      |
  | that is bundled with this package in the file LICENSE, and is        |
  | available through the world-wide-web at the following url:           |
  | http://www.php.net/license/3_01.txt                                  |
  | If you did not receive a copy of the PHP license and are unable to   |
  | obtain it through the world-wide-web, please send a note to          |
  | license@php.net so we can mail you a copy immediately.               |
  +----------------------------------------------------------------------+
  | Author:                                                              |
  +----------------------------------------------------------------------+
*/

/* $Id$ */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "php.h"
#include "php_ini.h"
#include "ext/standard/info.h"
#include "php_say.h"

/* If you declare any globals in php_say.h uncomment this:
ZEND_DECLARE_MODULE_GLOBALS(say)
*/

/* True global resources - no need for thread safety here */
static int le_say;

/* {{{ PHP_INI
 */
/* Remove comments and fill if you need to have entries in php.ini
PHP_INI_BEGIN()
    STD_PHP_INI_ENTRY("say.global_value",      "42", PHP_INI_ALL, OnUpdateLong, global_value, zend_say_globals, say_globals)
    STD_PHP_INI_ENTRY("say.global_string", "foobar", PHP_INI_ALL, OnUpdateString, global_string, zend_say_globals, say_globals)
PHP_INI_END()
*/
/* }}} */

/* Remove the following function when you have successfully modified config.m4
   so that your module can be compiled into PHP, it exists only for testing
   purposes. */

/* Every user-visible function in PHP should document itself in the source */
/* {{{ proto string confirm_say_compiled(string arg)
   Return a string to confirm that the module is compiled in */
PHP_FUNCTION(confirm_say_compiled)
{
    char *arg = NULL;
    size_t arg_len, len;
    zend_string *strg;

    if (zend_parse_parameters(ZEND_NUM_ARGS(), "s", &arg, &arg_len) == FAILURE) {
        return;
    }

    strg = strpprintf(0, "hello word");

    RETURN_STR(strg);
}
/* }}} */
/* The previous line is meant for vim and emacs, so it can correctly fold and
   unfold functions in source code. See the corresponding marks just before
   function definition, where the functions purpose is also documented. Please
   follow this convention for the convenience of others editing your code.
*/


/* {{{ php_say_init_globals
 */
/* Uncomment this function if you have INI entries
static void php_say_init_globals(zend_say_globals *say_globals)
{
    say_globals->global_value = 0;
    say_globals->global_string = NULL;
}
*/
/* }}} */

/* {{{ PHP_MINIT_FUNCTION
 */
PHP_MINIT_FUNCTION(say)
{
    /* If you have INI entries, uncomment these lines
    REGISTER_INI_ENTRIES();
    */
    return SUCCESS;
}
/* }}} */

/* {{{ PHP_MSHUTDOWN_FUNCTION
 */
PHP_MSHUTDOWN_FUNCTION(say)
{
    /* uncomment this line if you have INI entries
    UNREGISTER_INI_ENTRIES();
    */
    return SUCCESS;
}
/* }}} */

/* Remove if there's nothing to do at request start */
/* {{{ PHP_RINIT_FUNCTION
 */
PHP_RINIT_FUNCTION(say)
{
#if defined(COMPILE_DL_SAY) && defined(ZTS)
    ZEND_TSRMLS_CACHE_UPDATE();
#endif
    return SUCCESS;
}
/* }}} */

/* Remove if there's nothing to do at request end */
/* {{{ PHP_RSHUTDOWN_FUNCTION
 */
PHP_RSHUTDOWN_FUNCTION(say)
{
    return SUCCESS;
}
/* }}} */

/* {{{ PHP_MINFO_FUNCTION
 */
PHP_MINFO_FUNCTION(say)
{
    php_info_print_table_start();
    php_info_print_table_header(2, "say support", "enabled");
    php_info_print_table_end();

    /* Remove comments if you have entries in php.ini
    DISPLAY_INI_ENTRIES();
    */
}
/* }}} */

/* {{{ say_functions[]
 *
 * Every user visible function must have an entry in say_functions[].
 */
const zend_function_entry say_functions[] = {
    PHP_FE(say, NULL)
    PHP_FE(confirm_say_compiled,    NULL)        /* For testing, remove later. */
    PHP_FE_END    /* Must be the last line in say_functions[] */
};
/* }}} */

/* {{{ say_module_entry
 */
zend_module_entry say_module_entry = {
    STANDARD_MODULE_HEADER,
    "say",
    say_functions,
    PHP_MINIT(say),
    PHP_MSHUTDOWN(say),
    PHP_RINIT(say),        /* Replace with NULL if there's nothing to do at request start */
    PHP_RSHUTDOWN(say),    /* Replace with NULL if there's nothing to do at request end */
    PHP_MINFO(say),
    PHP_SAY_VERSION,
    STANDARD_MODULE_PROPERTIES
};
/* }}} */

#ifdef COMPILE_DL_SAY
#ifdef ZTS
ZEND_TSRMLS_CACHE_DEFINE()
#endif
ZEND_GET_MODULE(say)
#endif

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 * vim600: noet sw=4 ts=4 fdm=marker
 * vim<600: noet sw=4 ts=4
 */

编译就出错了：

刚刚自己编译安装了个php7

phpize也是用的php7的，那为什么还出错呢？

Answer 1

其实问题在于，编译时指定一个选项：

 ./configure  --with-php-config=/usr/local/php7/bin/php-config

Answer 2

目测是缺少头文件, 或者文件包含路径错误