Cannot compile Zephyr project with standard macros INT8_C, UINT8_C, UINT16_C

[rohand87]

Hello,

I am trying to build this library in Zephyr. I am getting compiler errors for implicit declaration of function 'INT8_C', UINT8_C, UINT16_C. These are standard macros from stdint.h. I can build the same code in other platforms but not in Zephyr. I am not sure whether it is a issue with my setup. Please help.

To Reproduce
Steps to reproduce the behavior:

1. Use the attached project
2. Create an alias in device tree called i2c0. I am using a custom board
3. west build -b
4. Get the below warnings which ultimately lead to errors

Impact
showstopper

Logs and console output

In file included from ../src/bmp3.h:47,
                 from ../src/bmp3.c:41:
../src/bmp3.c: In function 'bmp3_init':
../src/bmp3_defs.h:280:49: warning: implicit declaration of function 'INT8_C'; did you mean 'INT8_MAX'? [-Wimplicit-function-declaration]
  280 | #define BMP3_OK                                 INT8_C(0)
      |                                                 ^~~~~~
../src/bmp3.c:708:17: note: in expansion of macro 'BMP3_OK'
  708 |     if (rslt == BMP3_OK)
      |                 ^~~~~~~
../src/bmp3_defs.h:167:49: warning: implicit declaration of function 'UINT8_C'; did you mean 'UINT8_MAX'? [-Wimplicit-function-declaration]
  167 | #define BMP3_REG_CHIP_ID                        UINT8_C(0x00)
      |                                                 ^~~~~~~

Environment (please complete the following information):

• OS: Linux
• Toolchain: zephyr-sdk-0.11.4
• Version: 2.4.99

Attachment
bmp3_zephyr.zip

Thanks

[galak]

I think this is just a missing feature of lib/libc/newlib/include/stdint.h

[rohand87]

Thanks for your reply @galak. What should be a good workaround to resolved this issue?

[galak]

Thanks for your reply @galak. What should be a good workaround to resolved this issue?

you can submit a PR to add the macro's to lib/libc/newlib/include/stdint.h