Is the a amount of padding in C struct well defined in standards or compiler and/or target architecture dependent. I could not find an answer in the standards.
Is the a amount of padding in C struct well defined in standards or
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Is the a amount of padding in C struct well defined in standards or compiler and/or target architecture dependent. I could not find an answer in the standards.
It is implementation-defined. From section 6.7.2.1 of the C99 standard:
The compiler will typically choose an arrangement that suits the underlying hardware (aligning things to be easy to read from memory, etc.).