使用vcpkg编译的glog报错：error C1189: #error: ＜glog/logging.h＞ was not included correctly.

error C1189: #error: <glog/logging.h> was not included correctly.

使用vcpkg编译的glog，包含logging.h后编译下面的代码：

#include<glog/logging.h>
#include<iostream>

int main()
{
    printf("Test\n");
    return 0;
}

报错：error C1189: #error: <glog/logging.h> was not included correctly.

这是由于，自0.7.0版本起，包含logging.h前需要定义宏GLOG_USE_GLOG_EXPORT。logging.h中代码如下所示：

包含GLOG_USE_GLOG_EXPORT宏之后，logging.h中关于GLOG_EXPORT和GLOG_NO_EXPORT的宏定义就都会生效。因此就不会产生上述错误信息。

添加GLOG_USE_GLOG_EXPORT定义后的代码如下：

#define GLOG_USE_GLOG_EXPORT
#include<glog/logging.h>
#include<iostream>

int main()
{
    printf("Test\n");
    return 0;
}