TimJTi opened a new issue, #13562:
URL: https://github.com/apache/nuttx/issues/13562
### Description / Steps to reproduce the issue
Perhaps due to me upgrading my arm gcc cross compiler recently, I'm seeing a
compiler warning because of the definition of __CONCAT - in my case this is in
_sama5d2x_memorymap.h but it occurs in 12 other files too
The warning is:
```
arm-gnu-toolchain-13.2.1-arm-none-eabi/arm-none-eabi/include/sys/cdefs.h:166:
note: this is the location of the previous definition
166 | #define __CONCAT(x,y) __CONCAT1(x,y)
```
I can fix this as follows but have no idea if a better, more global fix is
needed and, if so, where/how?
```
#ifndef __CONCAT
# define __CONCAT(a,b) a ## b
#endif
```
### On which OS does this issue occur?
[OS: Linux]
### What is the version of your OS?
Ubuntu 22.04.5 LTS
### NuttX Version
Master
### Issue Architecture
[Arch: arm]
### Issue Area
[Area: Board support]
### Verification
- [X] I have verified before submitting the report.
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