Compiler build paths and related environment variables are ignored for native builds

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-10-21.14:21:13.761>
labels = ['3.8', 'build', '3.7', '3.9']
title = 'Compiler build paths and related environment variables are ignored for native builds'
updated_at = <Date 2019-10-21.14:35:20.179>
user = 'https://bugs.python.org/AlexGrund'

bugs.python.org fields:

activity = <Date 2019-10-21.14:35:20.179>
actor = 'vstinner'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Build']
creation = <Date 2019-10-21.14:21:13.761>
creator = 'Alex Grund'
dependencies = []
files = []
hgrepos = []
issue_num = 38549
keywords = []
message_count = 3.0
messages = ['355073', '355075', '355076']
nosy_count = 2.0
nosy_names = ['vstinner', 'Alex Grund']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'compile error'
url = 'https://bugs.python.org/issue38549'
versions = ['Python 2.7', 'Python 3.5', 'Python 3.6', 'Python 3.7', 'Python 3.8', 'Python 3.9']