Change Details

This is part 2 of adopting C17, therefore migrating to `gnu17` from `gnu99`. This depends on D43237 **Why?** There are many reasons, but some prominent reasons are - Facilitating the adoption of C23/C2x. This is likely to be finalized in 2024, and `clang` has already [[ https://clang.llvm.org/c_status.html | implemented ]] most of C2x features. Migrating from C17 to C2x will be easier than migrating from C99 to C2x. - C11 has adopted GCC specific features as a part of standard, such as _Alignas. However, _Alignof cannot be used in an expression according to standard C23 - Allowing programs to use C11 features without specifying `CSTD= c17` or similar. **This revision does** - Change default C standard version for `buildkernel` to `gnu17` - Replace `_Alignof` with `__alignof__` to avoid `error: '_Alignof' applied to an expression is a GNU extension` I copied `include/assert.h` to zstd freebsd include folder instead of copying and pasting it to `zstd_kfreebsd.h".

This is part 2 of adopting C17, therefore migrating to `gnu17` from `gnu99`. This depends on D43237 **Why?** There are many reasons, but some prominent reasons are - Facilitating the adoption of C23/C2x. This is likely to be finalized in 2024, and `clang` has already [[ https://clang.llvm.org/c_status.html | implemented ]] most of C2x features. Migrating from C17 to C2x will be easier than migrating from C99 to C2x. - C11 has adopted GCC specific features as a part of standard, such as _Alignas. However, _Alignof cannot be used in an expression according to standard C23 - Allowing programs to use C11 features without specifying `CSTD= c17` or similar. **This revision does** - Change default C standard version for `buildkernel` to `gnu17` - Replace `_Alignof` with `__alignof__` to avoid `error: '_Alignof' applied to an expression is a GNU extension`

This is part 2 of adopting C17, therefore migrating to `gnu17` from `gnu99`. This depends on D43237 **Why?** There are many reasons, but some prominent reasons are - Facilitating the adoption of C23/C2x. This is likely to be finalized in 2024, and `clang` has already [[ https://clang.llvm.org/c_status.html | implemented ]] most of C2x features. Migrating from C17 to C2x will be easier than migrating from C99 to C2x. - C11 has adopted GCC specific features as a part of standard, such as _Alignas. However, _Alignof cannot be used in an expression according to standard C23 - Allowing programs to use C11 features without specifying `CSTD= c17` or similar. **This revision does** - Change default C standard version for `buildkernel` to `gnu17` - Replace `_Alignof` with `__alignof__` to avoid `error: '_Alignof' applied to an expression is a GNU extension` I copied `include/assert.h` to zstd freebsd include folder instead of copying and pasting it to `zstd_kfreebsd.h".