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- error: ‘for’ loop initial declarations are only allowed in C99 mode
for(int i = 0;
i < 31;
i++){
note提示里面已有解决方法
note: use option -std=c99 or -std=gnu99 to compile your code所以gcc只需要添加参数: gcc -std=c99 target.c
其他版本c11: gcc -std=c1x
gcc -std=c11 gcc --version//查看版本
- error: unknown type name ‘sigset_t’
warning: implicit declaration of function ‘sigemptyset’ [-Wimplicit-function-declaration]
error: ‘SIG_BLOCK’ undeclared (first use in this function)
解决方法: gcc -std=gnu99 target.c
- man文档不全
下载: yum install man-pages其他命令不全: yum -y install gdb
yum -y install tree
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