I have an embedded IoT project that I like to first develop in part by using PC tools such as VisualStudio. My embedded project has only a flash memory for a file system, and I'd like to redirect fopen fread etc. to my own private implementation on Windows. But what I'm encountering is an inability to have my private CRT library take precedence over the built-in CRT (e.g., built-in behavior driven by /MD compiler switch).
I have a simple three project solution.
Project 1 is a test executable. It has a one line main:
int main()
{
test();
}
Project 2 and 3 are static libraries. Project 2 has:
#include
#include
void test()
{
printf("%s\n", strchr("x", 'x'));
}
Project 3 has:
char * strchr(const char * s, int c) // exact signature of MSVC
{
return "overridden";
}
I expect output to be overridden but instead it is
x
But if I add this to Project 1:
printf("%s\n", strchr("y", 'y'));
The output will be
overridden
overridden
First one from test() in library, second from executable main() directly.
Any suggestions?
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