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__ARMCC_VERSION: https://smtp.keil.com/support/man/docs/armcc/armcc_chr1359124980173.htm __IAR_SYSTEMS_ICC__: <Not Found> __GNUC__: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-packed-type-attribute __ADSPBLACKFIN__: <Not Found> _MSC_VER: https://learn.microsoft.com/en-us/cpp/preprocessor/pack?view=msvc-170 __TI_COMPILER_VERSION__: https://software-dl.ti.com/codegen/docs/tiarmclang/rel1_3_0_LTS/migration_guide/migrating_c_and_cpp_source/pragmas_and_attributes.html __TASKING__: https://resources.tasking.com/sites/default/files/2021-02/TASKING_Alignment%20Requirements%20Restrictions_WEB.pdf Usage: ```c rt_packed(struct object1 { int dword; char byte; }); typedef struct object1 object1; rt_packed(struct object2 { int dword; char byte; }); ``` Signed-off-by: GuEe-GUI <2991707448@qq.com>