[cfe-users] Adding linker flag `-save-temps` resolves the clang-8 error: "unable to make temporary file"

[Danijel DOMAZET via cfe-users]

Thanks Fang-rui.
I still haven't been able to fix the issue, I still use --save-temps, and
that makes linking very slow.
Why does this error go away when I set --save-temps, any idea??



On Thu, Aug 13, 2020 at 7:16 PM Fāng-ruì Sòng <maskray at google.com> wrote:

> On Thu, Aug 13, 2020 at 8:59 AM David Blaikie <dblaikie at gmail.com> wrote:
> >
> > On Thu, Aug 13, 2020 at 2:59 AM Danijel DOMAZET
> > <p-danijel.domazet at devialet.com> wrote:
> > >
> > > Thanks David.
> > > Why do you think this could be about current dir?
> > > Isn't it about TMP (or TEMP or TMPDIR) environment variables?
>
> Neither the driver option -save-temps nor the linker option
> --save-temps (driver option -Wl,--save-temps) respects
> TMP/TEMP/TMPDIR.
> The temporary files are saved relative to the current working
> directory, which can be changed via -working-directory=
>
> > Because I ran it locally, and observed that that's where the files
> > were written to.
> >
> > >
> > > Thanks,
> > > Danijel Domazet
> > >
> > >
> > > On Thu, Aug 13, 2020 at 12:11 AM David Blaikie <dblaikie at gmail.com>
> wrote:
> > >>
> > >> Looks like it writes the files to the current directory - do you have
> > >> permission to access the current directory?
> > >>
> > >> On Wed, Aug 12, 2020 at 6:28 AM Danijel DOMAZET via cfe-users
> > >> <cfe-users at lists.llvm.org> wrote:
> > >> >
> > >> > Hi clang users,
> > >> > I am using Windows10 + Cygwin + Eclipse +  LLVM toolchain to build
> a C/C++
> > >> > project.
> > >> >
> > >> > The files compile fine, but linking with `clang++` fails with
> multiple
> > >> > `error: unable to make temporary file: No such file or directory`.
> > >> >
> > >> >     clang++ -o test "source1.bc" "source2.bc" "source3.bc"
> > >> >     clang-8: error: unable to make temporary file: No such file or
> directory
> > >> >     clang-8: error: unable to make temporary file: No such file or
> directory
> > >> >     clang-8: error: unable to make temporary file: No such file or
> directory
> > >> >
> > >> > Linker generates one error per each object file.
> > >> >
> > >> > However, when I add the `-save-temps` option to linker, it works OK.
> > >> >
> > >> > I am launching Eclipse.exe from within Cygwin. I have tried to set
> TMP,
> > >> > TEMP to /temp, /temp/, /cygdrive/c/temp, etc, but nothing worked.
> > >> >
> > >> > What could be the problem?
> > >> >
> > >> > Thanks,
> > >> > Danijel Domazet
> > >> >
> > >> >
> > >> >
> > >> > - Confidential -
> > >> > _______________________________________________
> > >> > cfe-users mailing list
> > >> > cfe-users at lists.llvm.org
> > >> > https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
> > >
> > >
> > > - Confidential -
>
>
>
> --
> 宋方睿
>

-- 
- Confidential -
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