On Mon, Apr 4, 2022 at 5:16 PM arthurwil...@gmail.com
<arthurwilliammor...@gmail.com> wrote:
>
>
>
> On Monday, April 4, 2022 at 7:00:49 PM UTC-5 arthurwil...@gmail.com wrote:
>>
>> On Monday, April 4, 2022 at 6:14:30 PM UTC-5 Ian Lance Taylor wrote:
>>>
>>> On Mon, Apr 4, 2022 at 3:49 PM arthurwil...@gmail.com
>>> <arthurwil...@gmail.com> wrote:
>>> >
>>> >
>>> >
>>> > On Sunday, April 3, 2022 at 10:35:04 PM UTC-5 Ian Lance Taylor wrote:
>>> >>
>>> >> On Sun, Apr 3, 2022 at 6:21 PM arthurwil...@gmail.com
>>> >> <arthurwil...@gmail.com> wrote:
>>> >> >
>>> >> > I'm trying to build an unoptimized version of the standard library for
>>> >> > debugging.
>>> >>
>>> >> You can just use
>>> >>
>>> >> go build -gcflags=all="-N -l"
>>> >>
>>> >
>>> > That gives this error:
>>> > /Volumes/git/goroot/src (master)$ go build -gcflags=all="-N -l"
>>> > no Go files in /Volumes/git/goroot/src
>>>
>>> You have to run this wherever you are building your actual Go program.
>>>
>>> What I mean is, if you want to "go build x.go" and you want to build
>>> that with a standard library built for maximal debugging, then rn "go
>>> build -gcflags=all="-N -l" x.go". Any flags specified by
>>> -gcflags=all="FLAGS" will be used to build the standard library as
>>> well. You don't need to build the standard library separately.
>>>
>>> Ian
>>
>>
>> Thanks Ian. I cleaned the cache and mod cache and passed -x to see all the
>> commands run and noticed go build is not propagating the -N -l flags to the
>> compiler for a lot of the files.
>>
>> Also noticed some extra compiler flags (-std, -+) that are not listed in the
>> compile command documentation
>>
>> What do these -std and -+ compiler flags do?
>>
>> Why are some compilation commands missing -N -l?
>>
>>
>
> I found some clues:
>
> CompilingRuntime bool "flag:\"+\" help:\"compiling runtime\""
>
> and:
>
> if Flag.CompilingRuntime && Flag.N != 0 {
> log.Fatal("cannot disable optimizations while compiling runtime")
> }
Yeah.
The -std flag is passed when compiling packages in the standard
library. Certain undocumented compiler pragmas are only permitted for
standard library code.
Ian
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