I am trying to install grpc on AIX. I get a few warnings towards the end. 
What do they mean? What will be the implications?

Foloowing is the gcc version:
go version go1.9 gccgo (GCC) 8.0.0 20171205 (experimental) aix/ppc

Below is the installation log:

bash-4.4# go get -u -v google.golang.org/grpc
Fetching https://google.golang.org/grpc?go-get=1
Parsing meta tags from https://google.golang.org/grpc?go-get=1 (status code 
200)
get "google.golang.org/grpc": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc?go-get=1
google.golang.org/grpc (download)
created GOPATH=/go; see 'go help gopath'
Fetching https://golang.org/x/net/context?go-get=1
Parsing meta tags from https://golang.org/x/net/context?go-get=1 (status 
code 200)
get "golang.org/x/net/context": found meta tag 
get.metaImport{Prefix:"golang.org/x/net", VCS:"git", 
RepoRoot:"https://go.googlesource.com/net"} at 
https://golang.org/x/net/context?go-get=1
get "golang.org/x/net/context": verifying non-authoritative meta tag
Fetching https://golang.org/x/net?go-get=1
Parsing meta tags from https://golang.org/x/net?go-get=1 (status code 200)
golang.org/x/net (download)
Fetching https://golang.org/x/net/http2?go-get=1
Parsing meta tags from https://golang.org/x/net/http2?go-get=1 (status code 
200)
get "golang.org/x/net/http2": found meta tag 
get.metaImport{Prefix:"golang.org/x/net", VCS:"git", 
RepoRoot:"https://go.googlesource.com/net"} at 
https://golang.org/x/net/http2?go-get=1
get "golang.org/x/net/http2": verifying non-authoritative meta tag
Fetching https://golang.org/x/net/http2/hpack?go-get=1
Parsing meta tags from https://golang.org/x/net/http2/hpack?go-get=1 
(status code 200)
get "golang.org/x/net/http2/hpack": found meta tag 
get.metaImport{Prefix:"golang.org/x/net", VCS:"git", 
RepoRoot:"https://go.googlesource.com/net"} at 
https://golang.org/x/net/http2/hpack?go-get=1
get "golang.org/x/net/http2/hpack": verifying non-authoritative meta tag
Fetching https://golang.org/x/net/idna?go-get=1
Parsing meta tags from https://golang.org/x/net/idna?go-get=1 (status code 
200)
get "golang.org/x/net/idna": found meta tag 
get.metaImport{Prefix:"golang.org/x/net", VCS:"git", 
RepoRoot:"https://go.googlesource.com/net"} at 
https://golang.org/x/net/idna?go-get=1
get "golang.org/x/net/idna": verifying non-authoritative meta tag
Fetching https://golang.org/x/text/secure/bidirule?go-get=1
Parsing meta tags from https://golang.org/x/text/secure/bidirule?go-get=1 
(status code 200)
get "golang.org/x/text/secure/bidirule": found meta tag 
get.metaImport{Prefix:"golang.org/x/text", VCS:"git", 
RepoRoot:"https://go.googlesource.com/text"} at 
https://golang.org/x/text/secure/bidirule?go-get=1
get "golang.org/x/text/secure/bidirule": verifying non-authoritative meta 
tag
Fetching https://golang.org/x/text?go-get=1
Parsing meta tags from https://golang.org/x/text?go-get=1 (status code 200)
golang.org/x/text (download)
Fetching https://golang.org/x/text/transform?go-get=1
Parsing meta tags from https://golang.org/x/text/transform?go-get=1 (status 
code 200)
get "golang.org/x/text/transform": found meta tag 
get.metaImport{Prefix:"golang.org/x/text", VCS:"git", 
RepoRoot:"https://go.googlesource.com/text"} at 
https://golang.org/x/text/transform?go-get=1
get "golang.org/x/text/transform": verifying non-authoritative meta tag
Fetching https://golang.org/x/text/unicode/bidi?go-get=1
Parsing meta tags from https://golang.org/x/text/unicode/bidi?go-get=1 
(status code 200)
get "golang.org/x/text/unicode/bidi": found meta tag 
get.metaImport{Prefix:"golang.org/x/text", VCS:"git", 
RepoRoot:"https://go.googlesource.com/text"} at 
https://golang.org/x/text/unicode/bidi?go-get=1
get "golang.org/x/text/unicode/bidi": verifying non-authoritative meta tag
Fetching https://golang.org/x/text/unicode/norm?go-get=1
Parsing meta tags from https://golang.org/x/text/unicode/norm?go-get=1 
(status code 200)
get "golang.org/x/text/unicode/norm": found meta tag 
get.metaImport{Prefix:"golang.org/x/text", VCS:"git", 
RepoRoot:"https://go.googlesource.com/text"} at 
https://golang.org/x/text/unicode/norm?go-get=1
get "golang.org/x/text/unicode/norm": verifying non-authoritative meta tag
Fetching https://golang.org/x/net/lex/httplex?go-get=1
Parsing meta tags from https://golang.org/x/net/lex/httplex?go-get=1 
(status code 200)
get "golang.org/x/net/lex/httplex": found meta tag 
get.metaImport{Prefix:"golang.org/x/net", VCS:"git", 
RepoRoot:"https://go.googlesource.com/net"} at 
https://golang.org/x/net/lex/httplex?go-get=1
get "golang.org/x/net/lex/httplex": verifying non-authoritative meta tag
Fetching https://golang.org/x/net/trace?go-get=1
Parsing meta tags from https://golang.org/x/net/trace?go-get=1 (status code 
200)
get "golang.org/x/net/trace": found meta tag 
get.metaImport{Prefix:"golang.org/x/net", VCS:"git", 
RepoRoot:"https://go.googlesource.com/net"} at 
https://golang.org/x/net/trace?go-get=1
get "golang.org/x/net/trace": verifying non-authoritative meta tag
Fetching https://golang.org/x/net/internal/timeseries?go-get=1
Parsing meta tags from 
https://golang.org/x/net/internal/timeseries?go-get=1 (status code 200)
get "golang.org/x/net/internal/timeseries": found meta tag 
get.metaImport{Prefix:"golang.org/x/net", VCS:"git", 
RepoRoot:"https://go.googlesource.com/net"} at 
https://golang.org/x/net/internal/timeseries?go-get=1
get "golang.org/x/net/internal/timeseries": verifying non-authoritative 
meta tag
Fetching https://google.golang.org/grpc/balancer?go-get=1
Parsing meta tags from https://google.golang.org/grpc/balancer?go-get=1 
(status code 200)
get "google.golang.org/grpc/balancer": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/balancer?go-get=1
get "google.golang.org/grpc/balancer": verifying non-authoritative meta tag
Fetching https://google.golang.org/grpc?go-get=1
Parsing meta tags from https://google.golang.org/grpc?go-get=1 (status code 
200)
Fetching https://google.golang.org/grpc/connectivity?go-get=1
Parsing meta tags from https://google.golang.org/grpc/connectivity?go-get=1 
(status code 200)
get "google.golang.org/grpc/connectivity": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/connectivity?go-get=1
get "google.golang.org/grpc/connectivity": verifying non-authoritative meta 
tag
Fetching https://google.golang.org/grpc/grpclog?go-get=1
Parsing meta tags from https://google.golang.org/grpc/grpclog?go-get=1 
(status code 200)
get "google.golang.org/grpc/grpclog": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/grpclog?go-get=1
get "google.golang.org/grpc/grpclog": verifying non-authoritative meta tag
Fetching https://google.golang.org/grpc/credentials?go-get=1
Parsing meta tags from https://google.golang.org/grpc/credentials?go-get=1 
(status code 200)
get "google.golang.org/grpc/credentials": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/credentials?go-get=1
get "google.golang.org/grpc/credentials": verifying non-authoritative meta 
tag
Fetching https://google.golang.org/grpc/resolver?go-get=1
Parsing meta tags from https://google.golang.org/grpc/resolver?go-get=1 
(status code 200)
get "google.golang.org/grpc/resolver": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/resolver?go-get=1
get "google.golang.org/grpc/resolver": verifying non-authoritative meta tag
Fetching https://google.golang.org/grpc/balancer/roundrobin?go-get=1
Parsing meta tags from 
https://google.golang.org/grpc/balancer/roundrobin?go-get=1 (status code 
200)
get "google.golang.org/grpc/balancer/roundrobin": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/balancer/roundrobin?go-get=1
get "google.golang.org/grpc/balancer/roundrobin": verifying 
non-authoritative meta tag
Fetching https://google.golang.org/grpc/balancer/base?go-get=1
Parsing meta tags from 
https://google.golang.org/grpc/balancer/base?go-get=1 (status code 200)
get "google.golang.org/grpc/balancer/base": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/balancer/base?go-get=1
get "google.golang.org/grpc/balancer/base": verifying non-authoritative 
meta tag
Fetching https://google.golang.org/grpc/codes?go-get=1
Parsing meta tags from https://google.golang.org/grpc/codes?go-get=1 
(status code 200)
get "google.golang.org/grpc/codes": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/codes?go-get=1
get "google.golang.org/grpc/codes": verifying non-authoritative meta tag
Fetching https://google.golang.org/grpc/encoding?go-get=1
Parsing meta tags from https://google.golang.org/grpc/encoding?go-get=1 
(status code 200)
get "google.golang.org/grpc/encoding": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/encoding?go-get=1
get "google.golang.org/grpc/encoding": verifying non-authoritative meta tag
Fetching https://google.golang.org/grpc/encoding/proto?go-get=1
Parsing meta tags from 
https://google.golang.org/grpc/encoding/proto?go-get=1 (status code 200)
get "google.golang.org/grpc/encoding/proto": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/encoding/proto?go-get=1
get "google.golang.org/grpc/encoding/proto": verifying non-authoritative 
meta tag
github.com/golang/protobuf (download)
Fetching https://google.golang.org/grpc/grpclb/grpc_lb_v1/messages?go-get=1
Parsing meta tags from 
https://google.golang.org/grpc/grpclb/grpc_lb_v1/messages?go-get=1 (status 
code 200)
get "google.golang.org/grpc/grpclb/grpc_lb_v1/messages": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/grpclb/grpc_lb_v1/messages?go-get=1
get "google.golang.org/grpc/grpclb/grpc_lb_v1/messages": verifying 
non-authoritative meta tag
Fetching https://google.golang.org/grpc/internal?go-get=1
Parsing meta tags from https://google.golang.org/grpc/internal?go-get=1 
(status code 200)
get "google.golang.org/grpc/internal": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/internal?go-get=1
get "google.golang.org/grpc/internal": verifying non-authoritative meta tag
Fetching https://google.golang.org/grpc/keepalive?go-get=1
Parsing meta tags from https://google.golang.org/grpc/keepalive?go-get=1 
(status code 200)
get "google.golang.org/grpc/keepalive": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/keepalive?go-get=1
get "google.golang.org/grpc/keepalive": verifying non-authoritative meta tag
Fetching https://google.golang.org/grpc/metadata?go-get=1
Parsing meta tags from https://google.golang.org/grpc/metadata?go-get=1 
(status code 200)
get "google.golang.org/grpc/metadata": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/metadata?go-get=1
get "google.golang.org/grpc/metadata": verifying non-authoritative meta tag
Fetching https://google.golang.org/grpc/naming?go-get=1
Parsing meta tags from https://google.golang.org/grpc/naming?go-get=1 
(status code 200)
get "google.golang.org/grpc/naming": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/naming?go-get=1
get "google.golang.org/grpc/naming": verifying non-authoritative meta tag
Fetching https://google.golang.org/grpc/peer?go-get=1
Parsing meta tags from https://google.golang.org/grpc/peer?go-get=1 (status 
code 200)
get "google.golang.org/grpc/peer": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/peer?go-get=1
get "google.golang.org/grpc/peer": verifying non-authoritative meta tag
Fetching https://google.golang.org/grpc/resolver/dns?go-get=1
Parsing meta tags from https://google.golang.org/grpc/resolver/dns?go-get=1 
(status code 200)
get "google.golang.org/grpc/resolver/dns": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/resolver/dns?go-get=1
get "google.golang.org/grpc/resolver/dns": verifying non-authoritative meta 
tag
Fetching https://google.golang.org/grpc/resolver/passthrough?go-get=1
Parsing meta tags from 
https://google.golang.org/grpc/resolver/passthrough?go-get=1 (status code 
200)
get "google.golang.org/grpc/resolver/passthrough": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/resolver/passthrough?go-get=1
get "google.golang.org/grpc/resolver/passthrough": verifying 
non-authoritative meta tag
Fetching https://google.golang.org/grpc/stats?go-get=1
Parsing meta tags from https://google.golang.org/grpc/stats?go-get=1 
(status code 200)
get "google.golang.org/grpc/stats": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/stats?go-get=1
get "google.golang.org/grpc/stats": verifying non-authoritative meta tag
Fetching https://google.golang.org/grpc/status?go-get=1
Parsing meta tags from https://google.golang.org/grpc/status?go-get=1 
(status code 200)
get "google.golang.org/grpc/status": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/status?go-get=1
get "google.golang.org/grpc/status": verifying non-authoritative meta tag
Fetching https://google.golang.org/genproto/googleapis/rpc/status?go-get=1
Parsing meta tags from 
https://google.golang.org/genproto/googleapis/rpc/status?go-get=1 (status 
code 200)
get "google.golang.org/genproto/googleapis/rpc/status": found meta tag 
get.metaImport{Prefix:"google.golang.org/genproto", VCS:"git", 
RepoRoot:"https://github.com/google/go-genproto"} at 
https://google.golang.org/genproto/googleapis/rpc/status?go-get=1
get "google.golang.org/genproto/googleapis/rpc/status": verifying 
non-authoritative meta tag
Fetching https://google.golang.org/genproto?go-get=1
Parsing meta tags from https://google.golang.org/genproto?go-get=1 (status 
code 200)
google.golang.org/genproto (download)
Fetching https://google.golang.org/grpc/tap?go-get=1
Parsing meta tags from https://google.golang.org/grpc/tap?go-get=1 (status 
code 200)
get "google.golang.org/grpc/tap": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/tap?go-get=1
get "google.golang.org/grpc/tap": verifying non-authoritative meta tag
Fetching https://google.golang.org/grpc/transport?go-get=1
Parsing meta tags from https://google.golang.org/grpc/transport?go-get=1 
(status code 200)
get "google.golang.org/grpc/transport": found meta tag 
get.metaImport{Prefix:"google.golang.org/grpc", VCS:"git", 
RepoRoot:"https://github.com/grpc/grpc-go"} at 
https://google.golang.org/grpc/transport?go-get=1
get "google.golang.org/grpc/transport": verifying non-authoritative meta tag
golang.org/x/net/context
golang.org/x/net/http2/hpack
golang.org/x/text/transform
golang.org/x/text/unicode/bidi
golang.org/x/net/internal/timeseries
google.golang.org/grpc/grpclog
google.golang.org/grpc/resolver
google.golang.org/grpc/codes
google.golang.org/grpc/encoding
github.com/golang/protobuf/proto
google.golang.org/grpc/internal
google.golang.org/grpc/keepalive
# google.golang.org/grpc/codes
ar: 0707-101 D is not a valid flag.
# golang.org/x/net/context
ar: 0707-101 D is not a valid flag.
# google.golang.org/grpc/resolver
ar: 0707-101 D is not a valid flag.
# google.golang.org/grpc/encoding
ar: 0707-101 D is not a valid flag.
google.golang.org/grpc/credentials
google.golang.org/grpc/metadata
# google.golang.org/grpc/keepalive
ar: 0707-101 D is not a valid flag.
google.golang.org/grpc/stats
google.golang.org/grpc/tap
# google.golang.org/grpc/internal
ar: 0707-101 D is not a valid flag.
# google.golang.org/grpc/grpclog
ar: 0707-101 D is not a valid flag.
# google.golang.org/grpc/tap
ar: 0707-101 D is not a valid flag.
google.golang.org/grpc/resolver/passthrough
# google.golang.org/grpc/metadata
ar: 0707-101 D is not a valid flag.
google.golang.org/grpc/naming
google.golang.org/grpc/resolver/dns
google.golang.org/grpc/connectivity
# google.golang.org/grpc/credentials
ar: 0707-101 D is not a valid flag.
# google.golang.org/grpc/connectivity
ar: 0707-101 D is not a valid flag.
# google.golang.org/grpc/resolver/passthrough
ar: 0707-101 D is not a valid flag.
# google.golang.org/grpc/stats
ar: 0707-101 D is not a valid flag.
# golang.org/x/text/transform
ar: 0707-101 D is not a valid flag.
# golang.org/x/net/internal/timeseries
ar: 0707-101 D is not a valid flag.
google.golang.org/grpc/peer
google.golang.org/grpc/balancer
# google.golang.org/grpc/naming
ar: 0707-101 D is not a valid flag.
golang.org/x/text/unicode/norm
# golang.org/x/net/http2/hpack
ar: 0707-101 D is not a valid flag.
golang.org/x/net/trace
# google.golang.org/grpc/resolver/dns
ar: 0707-101 D is not a valid flag.
# google.golang.org/grpc/balancer
ar: 0707-101 D is not a valid flag.
# google.golang.org/grpc/peer
ar: 0707-101 D is not a valid flag.
google.golang.org/grpc/balancer/base
# google.golang.org/grpc/balancer/base
ar: 0707-101 D is not a valid flag.
# golang.org/x/text/unicode/bidi
ar: 0707-101 D is not a valid flag.
google.golang.org/grpc/balancer/roundrobin
golang.org/x/text/secure/bidirule
# google.golang.org/grpc/balancer/roundrobin
ar: 0707-101 D is not a valid flag.
# golang.org/x/text/secure/bidirule
ar: 0707-101 D is not a valid flag.
# golang.org/x/net/trace
ar: 0707-101 D is not a valid flag.
# golang.org/x/text/unicode/norm
ar: 0707-101 D is not a valid flag.
golang.org/x/net/idna
# golang.org/x/net/idna
ar: 0707-101 D is not a valid flag.
golang.org/x/net/lex/httplex
# golang.org/x/net/lex/httplex
ar: 0707-101 D is not a valid flag.
golang.org/x/net/http2
# github.com/golang/protobuf/proto
ar: 0707-101 D is not a valid flag.
google.golang.org/grpc/encoding/proto
google.golang.org/grpc/grpclb/grpc_lb_v1/messages
github.com/golang/protobuf/ptypes/duration
github.com/golang/protobuf/ptypes/any
github.com/golang/protobuf/ptypes/timestamp
# github.com/golang/protobuf/ptypes/any
ar: 0707-101 D is not a valid flag.
# github.com/golang/protobuf/ptypes/duration
ar: 0707-101 D is not a valid flag.
# github.com/golang/protobuf/ptypes/timestamp
ar: 0707-101 D is not a valid flag.
google.golang.org/genproto/googleapis/rpc/status
github.com/golang/protobuf/ptypes
# google.golang.org/genproto/googleapis/rpc/status
ar: 0707-101 D is not a valid flag.
# google.golang.org/grpc/encoding/proto
ar: 0707-101 D is not a valid flag.
# google.golang.org/grpc/grpclb/grpc_lb_v1/messages
ar: 0707-101 D is not a valid flag.
# github.com/golang/protobuf/ptypes
ar: 0707-101 D is not a valid flag.
google.golang.org/grpc/status
# google.golang.org/grpc/status
ar: 0707-101 D is not a valid flag.
# golang.org/x/net/http2
ar: 0707-101 D is not a valid flag.
google.golang.org/grpc/transport
# google.golang.org/grpc/transport
ar: 0707-101 D is not a valid flag.
google.golang.org/grpc
# google.golang.org/grpc
ar: 0707-101 D is not a valid flag.

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