Clang IntelliSense: Error: use of undeclared identifier __nop

[kunzeti]

Hello,

I’m new in VisualGDB and I try to Import a KEIL µVision Project. Now I get the error, that __nop is undeclared identifier. My Hardware is a LPC1768.

The Main.cpp is as followed:

#include “LPC17xx.h”

#include “stdbool.h”

int main(void)

{

while (ture)

{

__nop();

}

}

 

 

The current Building and linking Defines in VisualGDB Project Properties -> Embedded Project are:

DEBUG __ARMCC_VERSION=560020 __arm__ __CC_ARM

<span class=”hps”>Are the</span> <span class=”hps”>settings</span> <span class=”hps”>correct? Did I forgot something?</span>

• This topic was modified 8 years, 2 months ago by kunzeti.
• This topic was modified 8 years, 2 months ago by kunzeti.

[support]

Hi,

This happens because _nop()  is not a GCC compiler extension and VisualGDB IntelliSense does not know about it.

You can work around it by adding something like #define _nop() to gcc_compat.h in the VisualGDB directory. The definition will only affect IntelliSense, so the code will be compiled the same way as before.

[Author]

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