: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: yohei at jp dot ibm.com
Target Milestone: ---
When I applied arithmetic shift (>>) to a 16-element signed char vector
variable, I observed behavior of logical right sh
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96399
--- Comment #1 from Yohei Ueda ---
Output of gcc -v:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/local/libexec/gcc/s390x-linux-gnu/10.2.0/lto-wrapper
Target: s390x-linux-gnu
Configured with: /usr/src/gcc/configure --build=s390
Assignee: ian at airs dot com
Reporter: yohei at jp dot ibm.com
CC: cmang at google dot com
When the DNS resolver with CGO fails for statically linked binaries, it should
fall back to the pure-go DNS resolver, if I understand correctly.
This fallback mechanism does work at
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63731
--- Comment #1 from Yohei Ueda ---
Created attachment 33966
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33966&action=edit
Fix the DNS lookup problem for statically linked binaries
I created a patch file that fixes this problem.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63731
--- Comment #2 from Yohei Ueda ---
I tested this issue with the latest GC trunk again, and noticed that GC always
compiles programs that contains DNS lookups with dynamic linking even if
-static is specified.
$ go version
go version devel +ae495
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63731
--- Comment #4 from Yohei Ueda ---
Thank you for the correction.
I need to use the following instructions to enable netgo with GC.
$ go version
go version devel +ae495517bd72 Fri Nov 14 11:43:01 2014 +1100 linux/amd64
$ go build -ldflags '-link
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63731
--- Comment #8 from Yohei Ueda ---
If we can distinguish between the "not found" errors due to invalid host names
and no nss, we can fall back to netgo only when nss is not available.
I noticed that errno is set to 0 for invalid hostnames, and i
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63731
--- Comment #10 from Yohei Ueda ---
https://code.google.com/p/go/source/browse/src/net/lookup_unix.go#63
func lookupIP(host string) (addrs []IP, err error) {
addrs, err, ok := cgoLookupIP(host)
if !ok {
addrs, err
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63731
--- Comment #12 from Yohei Ueda ---
"pure-Go goLookupIP" means that goLookupIP is written in Go as usual.
https://code.google.com/p/go/source/browse/src/net/dnsclient_unix.go#364
cgoLookupIP uses getaddrinfo via CGO unless the netgo tag is set.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63731
--- Comment #14 from Yohei Ueda ---
I am not the original author, so my description may be inaccurate.
> why isn't this "fallback" code always built for GO and available
> to run instead of waiting until it hits this situation and then
> built
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63731
--- Comment #20 from Yohei Ueda ---
I noticed a Docker issue saying GC 1.4 does not rebuild the standard library
with -a.
https://github.com/docker/docker/issues/9449
I think the problem is now not limited to GCCGO.
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