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编程问题 外部程序引入后出现错误



我在做一个项目,需要用到ST公司的传感器,并引入外部代码。

我将外部代码放入一个正确运行地程序里,外部代码里引用了一些外部API函数,因此我将包含这些API函数.h文件include进工程里。

程序能够通过build,但是link时会出现错误,告诉我外部API函数未被定义。

恳请各位给予我指点!