Technically, 32 bit is no longer officially supported, so you might have more luck building 2.80 release instead of master. While I don’t expect any deliberate changes, the lack of 32bit testing of changes could allow a change to break 32bit builds. It may also be an arm (PI?) specific adjustment is needed.
The makesdna/makesrna part of blender is very picky when it comes to aligning struct members, this is to allow both 32 and 64 bit builds to read the same data, which keeps blend files readable on every system.
Compilers align struct members based on data size, which varies per target cpu, what that means is a short followed by a long could get two bytes of padding between them on a 64bit system but not a 32bit. To build blender we need to manually add padding to always match all possible compiler alignments. Also see blenders expected alignment sizes listed at the end of this post.
Your errors show failure in bGPDstroke as well as Scene. The fix is to find the struct members that are out of alignment and add padding.