To adapt user network enviroment, buildtools should first try to use
the user configured envs like SSL_CERT_FILE/CURL_CA_BUNDLE/..., if these
envs is not set, then use the auto-detected ca file and ca path, and
finally use the CA certificates in buildtools.
nativesdk-openssl set OPENSSLDIR as "/not/builtin", need set SSL_CERT_FILE/SSL_CERT_DIR to work
nativesdk-curl don't set default ca file, need
SSL_CERT_FILE/SSL_CERT_DIR or CURL_CA_BUNDLE/CURL_CA_PATH to work
nativesdk-git actually use libcurl, and GIT_SSL_CAPATH/GIT_SSL_CAINFO
also works
nativesdk-python3-requests will use cacert.pem under python module certifi by
default, need to set REQUESTS_CA_BUNDLE
(From OE-Core rev: 0653b96bac6d0800dc5154557706a323418808be)
Signed-off-by: Changqing Li <changqing.li@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
18206fc2db