Yes, this works for a simple program I have. Now I modified
the helloworld to use glog as follows:
package main
import (
"fmt"
"github.com/golang/glog"
)
func main() {
fmt.Println("Hello world....")
glog.Info("Hello world...")
}
But now I get another error from libglog.a:
amandeep@s113ldom1:~/workspace$ go build -gccgoflags=-m64 helloworld.go
# command-line-arguments
ld: warning: file
/opt/go_pkgs/pkg/gccgo_solaris_sparc/github.com/golang/libglog.a(_go_.o):
wrong ELF class: ELFCLASS32
Undefined first referenced
symbol in file
github_com_golang_glog..import $WORK/b001/_pkg_.a(_go_.o)
github_com_golang_glog.Info $WORK/b001/_pkg_.a(_go_.o)
ld: fatal: symbol referencing errors
collect2: error: ld returned 1 exit status
So, I thought recompiling glog with 64 bit option would help. None of the
following helped:
sudo GOPATH=/opt/go_pkgs/ CGO_LDFLAGS='-m64' go install
sudo GOPATH=/opt/go_pkgs/ go install -gccgoflags '-m64'
sudo GOPATH=/opt/go_pkgs/ go install -gccgoflags='-m64'
All of these generate the following:
amandeep@s113ldom1:/opt/go_pkgs/src/github.com/golang/glog$ file
/opt/go_pkgs/pkg/gccgo_solaris_sparc/github.com/golang/libglog.a
/opt/go_pkgs/pkg/gccgo_solaris_sparc/github.com/golang/libglog.a:
current ar archive, 32-bit symbol table
Regards,
Aman
On Thursday, September 27, 2018 at 3:01:12 PM UTC-7, Ian Lance Taylor wrote:
>
> On Thu, Sep 27, 2018 at 2:57 PM, Amandeep Gautam
> <amandee...@gmail.com <javascript:>> wrote:
> > Hi,
> > I am trying to compile a 64bit executable using gccgo on Solaris
> 11/10.
> > Following is what I have tried:
> >
> > CGO_LDFLAGS='-m64' go build hello_world.go
> > GOARCH=sparc64 CGO_LDFLAGS='-m64' go build hello_world.go
> >
> > Below is the output of the first command:
> >
> > amandeep@s113ldom1:~/workspace$ CGO_LDFLAGS='-m64' go build pqrs.go
> > # command-line-arguments
> > ld: warning: file $WORK/b001/_pkg_.a(_go_.o): wrong ELF class:
> ELFCLASS32
> > Undefined first referenced
> > symbol in file
> > main.main
> > /usr/gnu/lib/gcc/sparc-sun-solaris2.11/8.2.1/../../../sparcv9/libgo.so
> > __go_init_main
> > /usr/gnu/lib/gcc/sparc-sun-solaris2.11/8.2.1/../../../sparcv9/libgo.so
> > ld: fatal: symbol referencing errors
> > collect2: error: ld returned 1 exit status
> >
> > However, I am able to generate 64 bit executable for c++ helloworld
> using
> > just gcc, so I am hoping it boils down to passing the right set of
> flags.
> > For example:
> >
> > amandeep@s113ldom1:~/workspace$ /usr/gnu/bin/gcc -m64 helloworld.c
> > amandeep@s113ldom1:~/workspace$ file ./a.out
> > ./a.out: ELF 64-bit MSB executable SPARCV9 Version 1, dynamically
> > linked, not stripped, no debugging information available
> > amandeep@s113ldom1:~/workspace$ file /usr/gnu/bin/gcc
> > /usr/gnu/bin/gcc: ELF 32-bit MSB executable SPARC32PLUS Version 1,
> V8+
> > Required, dynamically linked, not stripped
> >
> > How would you compile a 64 bit executable for Solaris using gccgo?
>
> CGO_LDFLAGS only affects your program if it actually uses cgo.
>
> Does it work to do
> go build -gccgoflags=-m64
> ?
>
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