Re: [go-nuts] How does gccgo compile with my own package imported?

[ajee . cai]

Hi Ian, 

OK I got it now. I have to separately compile the imported packages as .o 
if I use gccgo and then link them to the final executable. Resolving the 
dependency of the packages may be troublesome so go tool is good if we have 
choice.

Thanks. 

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Re: [go-nuts] How does gccgo compile with my own package imported?

[Ian Lance Taylor]

On Fri, Jul 7, 2017 at 1:10 AM,   wrote:
>
> So, is it strange that gccgo can't compile if the main.go imports some
> non-standard library package?
> Is it meaning with gccgo, we have to write a single go file to contain
> everything, or just import only the standard library package?
> I used to try -I to indicate the package path also it doesn't help, can I
> conclude that gccgo doesn't fit for any complex go software development?

No, I don't see why you would reach that conclusion.

As I said before, the `gccgo` program acts like the `gcc` program.
When you run `gcc` on a C program that depends on some non-standard
library package, it will not go off and build that other non-standard
library.  `gccgo` is exactly the same.

As I said before, you should instead use the `go` program to build
your program.  The `go` program will build all required libraries.

Ian

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Re: [go-nuts] How does gccgo compile with my own package imported?

[ajee . cai]

Hi Ian,

Thanks for your reply. Although I am a seasoned c programmer I am a go 
beginner. 

So, is it strange that gccgo can't compile if the main.go imports some 
non-standard library package? 
Is it meaning with gccgo, we have to write a single go file to contain 
everything, or just import only the standard library package? 
I used to try -I to indicate the package path also it doesn't help, can I 
conclude that gccgo doesn't fit for any complex go software development? 

What I am doing is try to build some open source go code into openWrt, with 
some unofficial patch I can build toolchain with gccgo support (hope some 
day go support officially into OpenWrt), but it only produces gccgo, there 
is no go tool. There is gcc-5.3.0/libgo/go/cmd/go in the toolchain, where I 
run "gccgo -o go `ls *.go | grep -v _test.go | grep -v bootstrap | grep -v 
doc`" gives many errors. 

Thanks



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Re: [go-nuts] How does gccgo compile with my own package imported?

[Ian Lance Taylor]

On Thu, Jul 6, 2017 at 2:10 AM, ajee  wrote:
>
> Before I post here I did a lot of search by Google, there are several (but
> not many) similar topics but all of them don't have valid answer or apply to
> me.
>
> I have a simple code tree like this:
>
> ├── main.go
> └── transform
> ├── css.go
> ├── html.go
> ├── html_test.go
> └── http.go
>
> The main.go starts like this:
>
> package main
>
> import (
> "crypto/tls"
> "encoding/json"
> "io"
> "io/ioutil"
> "log"
> "net/http"
> "strings"
> "text/template"
> "./transform"
> )
> 
>
> Since my target is a mips router I have only gccgo available, I compile it
> with the gccgo of toolchain at the source directory:
> *gccgo  main.go
>
>
> Then it complains as :
>
> main.go:12:13: error: import file './transform' not found
>
> If I compile it under Ubuntu with go, it works. How to work through it with
> gccgo?

You will want to use `go build` just as you do with the gc toolchain.
The gccgo programs acts like GCC for other languages; it does not act
like the go tool.  When you install gccgo, you will get a copy of the
go tool that will invoke the gccgo program as needed.  Or you can use
the go tool from the gc toolchain and run `go build -compiler=gccgo`.

Ian

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[go-nuts] How does gccgo compile with my own package imported?

[ajee]

Hi,

Before I post here I did a lot of search by Google, there are several (but 
not many) similar topics but all of them don't have valid answer or apply 
to me.

I have a simple code tree like this: 

├── main.go
└── transform
├── css.go
├── html.go
├── html_test.go
└── http.go

The main.go starts like this: 

package main

import (
"crypto/tls"
"encoding/json"
"io"
"io/ioutil"
"log"
"net/http"
"strings"
"text/template"
"./transform"
)


Since my target is a mips router I have only gccgo available, I compile it 
with the gccgo of toolchain at the source directory:
*gccgo  main.go  


Then it complains as :

*main.go:12:13: error: import file './transform' not found*

If I compile it under Ubuntu with go, it works. How to work through it with 
gccgo? 

Thanks 

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