请教各位,如何解决 warning: stack protector not protecting local variables: variable length buffer - V2EX
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fenglala
V2EX    C

请教各位,如何解决 warning: stack protector not protecting local variables: variable length buffer

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  •   fenglala 2021-11-27 18:26:07 +08:00 2321 次点击
    这是一个创建于 1412 天前的主题,其中的信息可能已经有所发展或是发生改变。

    编译器: https://releases.linaro.org/components/toolchain/binaries/7.5-2019.12/arm-eabi/gcc-linaro-7.5.0-2019.12-x86_64_arm-eabi.tar.xz

    test.c:

    struct Foo{ char a[32]; // 32 and above will produce warning, but 31 and below will not char d[9]; // 9 and above will produce warning, but 8 and below will not }; int main() { struct Foo foo = {0}; (void)(foo); return 0; } 

    编译命令及输出:

    $ arm-eabi-gcc -Wstack-protector -fstack-protector-all -fstack-check -o test test.c test.c: In function ‘main’: test.c:6:5: warning: stack protector not protecting local variables: variable length buffer [-Wstack-protector] int main() ^~~~ 

    实际代码中的结构体类似上文的 Foo ,我不能改,但是 main 我可以改,请问怎么改 main 能解决这个 warning ?

    感谢各位!

    各位也可以去 https://stackoverflow.com/questions/70133887/how-can-i-fix-warning-stack-protector-not-protecting-local-variables-variable 上回答,我 Google 了一圈都没找到怎么解。

    3 条回复    2021-11-30 20:08:11 +08:00
    fenglala
        2
    fenglala  
    OP
       2021-11-27 18:41:44 +08:00
    @wudicgi 是个办法,直接去掉-Wstack-protector 或许更直接
    ExplorerLog
        3
    ExplorerLog  
       2021-11-30 20:08:11 +08:00
    static ?
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