/opt/gcc-arm/bin/arm-none-eabi-g++ ex.cc --specs=nosys.specs --specs=nano.specs -o arm.elf

/opt/gcc-riscv/bin/riscv-none-elf-g++ ex.cc --specs=nosys.specs --specs=nano.specs -o mrs.elf
../Downloads/xpack-riscv-none-elf-gcc-13.2.0-2/bin/riscv-none-elf-g++ ex.cc --specs=nosys.specs --specs=nano.specs -o xpack.elf

size *.elf
  text    data     bss     dec     hex filename
 47340     120     420   47880    bb08 arm.elf
320970    4500    7224  332694   51396 mrs.elf
 47109    4288     724   52121    cb99 xpack.elf

可见MRS的C++库优化有问题呀。

附上原始的测试文件：

#include
#include
#include

using namespace std;

void MyFunc(int c)
{
    if (c > numeric_limits< char> ::max())
    {
        throw invalid_argument("MyFunc argument too large.");
    }
    //...
}

// extern "C" void SystemInit()
// {
//
// }

int main()
{
    try
    {
        MyFunc(256); //cause an exception to throw
    }

    catch (invalid_argument& e)
    {
        //cerr << e.what() << endl;
        return -1;
    }
    //...
    return 0;
}

您好，感谢反馈，这边会反馈给相关同事