fix #23817; Use __builtin_saddl_overflow variants for arm-none-eabi-gcc. #23835
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narimiran
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…cc. (#23835) Provides a fix for #23817. With target `arm-none-eabi`, GCC defines `int32_t` to `long int`. Nim uses `__builtin_sadd_overflow` for 32-bit targets, but this emits warnings on GCC releases 13 and under, while generating an error on GCC 14. More info regarding this [here](https://gcc.gnu.org/gcc-14/porting_to.html#c) and [here](https://gcc.gnu.org/pipermail/gcc-cvs/2023-December/394351.html). The proposed PR attempts to address this issue for these targets by defining the `nimAddInt`, `nimSubInt`, and `nimMulInt` macros to use the appropriate compiler intrinsics for this platform. As for as we know, the LLVM toolchain for bare metal Arm does not define `int32_t` as `long int` and has no need for this patch. Thus, we only define the above macros for GCC targeting `arm-non-eabi`. (cherry picked from commit c5b206d)
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Provides a fix for #23817.
With target
arm-none-eabi, GCC definesint32_ttolong int. Nim uses__builtin_sadd_overflowfor 32-bit targets, but this emits warnings on GCC releases 13 and under, while generating an error on GCC 14. More info regarding this here and here.The proposed PR attempts to address this issue for these targets by defining the
nimAddInt,nimSubInt, andnimMulIntmacros to use the appropriate compiler intrinsics for this platform.As for as we know, the LLVM toolchain for bare metal Arm does not define
int32_taslong intand has no need for this patch. Thus, we only define the above macros for GCC targetingarm-non-eabi.