Add configs for log format

[chinglee-iot]

Description

Log format is different for different compiler.
For example, the following code can be compiled with GCC 32 bits and 64 bits.

uint32_t sentLen = 0;
LogDebug( ( "PktioSendData sent %u bytes", sentLen ) );

However, there will be format warning with GNU arm compiler.

FreeRTOS-Cellular-Interface/source/cellular_pktio.c:1430:17: error: format '%u' expects argument of type 'unsigned int', but argument 2 has type 'uint32_t' {aka 'long unsigned int'} [-Werror=format=]
 1430 |     LogDebug( ( "PktioSendData sent %u bytes", sentLen ) );
      |                 ^~~~~~~~~~~~~~~~~~~~~~         ~~~~~~~
      |                                                |
      |                                                uint32_t {aka long unsigned int}

Although C99 defines inttypes.h for this problem, this library doesn't reply on inttypes.h.

In this PR,

• The following log format configs are defined for different compiler
  • CELLULAR_LOG_FMT_UINT32_HEX
  • CELLULAR_LOG_FMT_UINT32
  • CELLULAR_LOG_FMT_UINT16
  • CELLULAR_LOG_FMT_UINT8
  • CELLULAR_LOG_FMT_INT32
  • CELLULAR_LOG_FMT_INT16
  • CELLULAR_LOG_FMT_INT8
  • CELLULAR_LOG_FMT_PTR
  • CELLULAR_LOG_FMT_STR
  • CELLULAR_LOG_FMT_SIZE
  • CELLULAR_LOG_FMT_CHAR

User with GNU ARM compiler can define the following in celllular_config.h

#define CELLULAR_LOG_FMT_SIZE "u"
#define CELLULAR_LOG_FMT_UINT32 "lu"
#define CELLULAR_LOG_FMT_INT32 "ld"

Or using PRIx macros if inttypes.h is preferred

#include <inttypes.h>

#define CELLULAR_LOG_FMT_SIZE PRIu16
#define CELLULAR_LOG_FMT_UINT32 PRIu32
#define CELLULAR_LOG_FMT_INT32 PRIi32

Test Steps

Reference this branch https://github.com/chinglee-iot/FreeRTOS-Cellular-Interface/tree/add-compiler-warning-check
GCC
Build with the following command.

cmake -S test -B build -DCMAKE_C_COMPILER_WORKS=1
cd build
make compilation_test

GNU arm
Add the following config in test/unit-test/configs/compilation-test/cellular_config.h

#define CELLULAR_LOG_FMT_SIZE "u"
#define CELLULAR_LOG_FMT_UINT32 "lu"
#define CELLULAR_LOG_FMT_INT32 "ld"

Build with the following command.

CC=arm-none-eabi-gcc cmake -B build -S test -DCMAKE_C_COMPILER_WORKS=1
cd build
make compilation_test

Checklist:

• I have tested my changes. No regression in existing tests.
• I have modified and/or added unit-tests to cover the code changes in this Pull Request.

Related Issue

#151
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