编译器显示 warning: built-in function ‘memset’ [enabled by default]问题解决

原创于 2014-03-19 15:47:24 发布 · 7k 阅读

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本文解决了在不包含<string.h>的情况下使用内置函数memset导致的编译警告问题，并提供了正确的头文件引用。

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built-in function ‘memset’ [enabled by default]

spidev_read.c: In function ‘spi_read’:
spidev_read.c:139:2: warning: incompatible implicit declaration of built-in function ‘memset’ [enabled by default]
spidev_read.c: In function ‘spi_write’:
spidev_read.c:170:2: warning: incompatible implicit declaration of built-in function ‘memset’ [enabled by default]
spidev_read.c: In function ‘init_mcp2515’:
spidev_read.c:205:3: warning: incompatible implicit declaration of built-in function ‘memset’ [enabled by default]
spidev_read.c: In function ‘spi_read’:
spidev_read.c:313:2: warning: incompatible implicit declaration of built-in function ‘memset’ [enabled by default]

问题是函数memset(bufw, 0, sizeof(bufw));

没有加入头文件：#include <string.h>