implicit declaration of function ... is invalid in C99

时间 2020-02-01

标签 implicit declaration function invalid c99 栏目 C&C++ 繁體版

原文原文链接

在头文件中 #ifndef 后边的字串不要与别的已经定义过的重复，尤为是在COPY的程序中，尤为要注意#ifndef 后边的是否与定义过的重复。否则其中一个不会被执行，致使该.c文件中的API调用的时候出现警告：implicit declaration of function ... is invalid in C99.

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1. Xcode10:Implicit declaration of function '' is invalid in C99
2. Implicit declaration of function 'inet_addr' is invalid in C99
3. Implicit declaration of function '' is invalid in C99.
4. Implicit declaration of function “xxx” is invalid in C99.
5. Implicit declaration of function '*****' is invalid in C99
6. iOS Implicit declaration of function XXX is invalid in C99”
7. implicit declaration of function "inet_addr" is invaild in C99
8. implicit declaration of function 'basename' is invalid in C99 [-Werror,-Wimplicit-function-declarati
9. 关于"implicit declaration of function 'gettimeofday' is invalid in c99"的解决
10. xcode9报 Implicit declaration of function 'require' is invalid in c99 的错误

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