makesetup Doesn't Handle Defines with Equal Sign

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-08-13.11:00:09.893>
labels = ['build', '3.8']
title = "makesetup Doesn't Handle Defines with Equal Sign"
updated_at = <Date 2019-10-29.21:40:45.566>
user = 'https://github.com/wbond'

bugs.python.org fields:

activity = <Date 2019-10-29.21:40:45.566>
actor = 'AstraLuma'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2019-08-13.11:00:09.893>
creator = 'wbond'
dependencies = []
files = []
hgrepos = []
issue_num = 37839
keywords = []
message_count = 3.0
messages = ['349543', '354852', '355682']
nosy_count = 3.0
nosy_names = ['AstraLuma', 'wbond', 'John Muth']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'compile error'
url = 'https://bugs.python.org/issue37839'
versions = ['Python 3.8']