Warnings not showing in "Issues" or "Compile Output"

[Guerrian]

In Qt Creator I am trying to find dead code in my app by using the following in my "pro" file:

QMAKE_CXXFLAGS += -std=c++11\
    -O3\
    -Wunused\
    -Wunreachable-code

As a test, just to make sure there is some dead code, I added this function to my code:

int none()
{
    return -1;
}

But no such message shows up in the "Issues" or "Compile Output" window.

[kshegunov]

@Guerrian said in Warnings not showing in "Issues" or "Compile Output":

But no such message shows up in the "Issues" or "Compile Output" window.

Try:

int none()
{
    return -1;

    int z = 0;
}

and tell us if that changes.

[Guerrian]

Ah yes, that did change. I was expecting it to tell me about unused functions.

[kshegunov]

@Guerrian said in Warnings not showing in "Issues" or "Compile Output":

I was expecting it to tell me about unused functions.

Nope. Unused functions are not "unreachable code".
You can still call them. ;)

[JKSH]

@Guerrian said in Warnings not showing in "Issues" or "Compile Output":

-Wunused

This finds unused variables.

-Wunreachable-code

This finds things like @kshegunov's example.

@Guerrian said in Warnings not showing in "Issues" or "Compile Output":

I was expecting it to tell me about unused functions.

You need a static code analyzer.