用Wl模拟函数换行不起作用

嗨，我正在编写单元测试，现在我需要模拟一个硬件调用的函数。代替原来的“Foo”函数，我想调用一个不同的函数“bar”，因此，在我的测试函数中，如果函数“FO”被调用，我可以检查一个标志。我不想仅仅为了测试目的而修改我的生产代码。所以，使用弱属性是毫无疑问的。我遇到链接器选项“--FrIP Fo”及其编译器选项“Wl，-Calp= FoO”。但这不起作用。我的模拟函数从不被调用。我所做的：在生产代码（FoBa.c）中：在我的测试代码（Test-FooBar .c）中：然后我重写了FooBar .c的构建选项，并将“-Wl，-Calp= FoO”添加到XC32 GCC选项的“附加选项”中。有人对此有过经验吗？我做错什么了？



      以下为原文

    Hi,

I am writing Unit-Tests and now I need to mock a function that does a hardware-call. Instead of the original "foo" function, I want to call a different function "bar" so, in my test function, I can check a flag if the function "foo" would have been called.

I do not want to modify my productive code solely for testing purposes! So, using the weak attribute is out of question.

I came across the linker option "--wrap foo" and its compiler option "-Wl,--wrap=foo". But this does not work. My mock function is never called.

What I did:
In the productive code (foobar.c):
void foo(int bar)
{
  return 1;
}

In my test code (test_foobar.c):
void __wrap_foo(int bar)
{
  return -1;
}

Then I have overridden the build options for foobar.c and added "-Wl,--wrap=foo" to the "Additional options" of xc32-gcc options.

Has someone experience with this? What am I doing wrong?