GNU bug report logs - #72587
Getting compilation error

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Package: gzip; Reported by: Daniel Ruf <ruf.shagentur@HIDDEN>; Done: Paul Eggert <eggert@HIDDEN>; Maintainer for gzip is bug-gzip@HIDDEN.
bug closed, send any further explanations to 72587 <at> debbugs.gnu.org and Daniel Ruf <ruf.shagentur@HIDDEN> Request was from Paul Eggert <eggert@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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From: Daniel Ruf <ruf.shagentur@HIDDEN>
Date: Mon, 12 Aug 2024 11:27:26 +0200
Message-ID: <CA+_CZ9XCzYf5t3r5CKt6bAJhXO4eo_1xGPHT6yxDdunE7rJj2g@HIDDEN>
Subject: Re: bug#72587: Getting compilation error
To: Paul Eggert <eggert@HIDDEN>
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--0000000000008e2d8f061f791abf
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Thanks, that was helpful. In the meantime I solved it with
-Wno-bad-function-cast even if I often read, that the warning should not be
ignored.

Paul Eggert <eggert@HIDDEN> schrieb am Mo., 12. Aug. 2024, 10:23:

> On 2024-08-11 17:55, Daniel Ruf via GNU gzip discussion and bug reports.
> wrote:
> > dup2.c:80:11: error: cast from function call of type 'intptr_t' {aka
> 'long
> > long int'} to non-matching type 'void *' [-Werror=bad-function-cast]
> > 80 | if ((HANDLE) _get_osfhandle (fd) == INVALID_HANDLE_VALUE)
> > | ^
> > cc1: all warnings being treated as errors
> > make[3]: *** [Makefile:2576: libgzip_a-dup2.o] Error 1
> > make[3]: Leaving directory
> > '/home/runner/work/gzip-windows-build/gzip-windows-build/gzip/lib'
> >
> > What are the correct steps to cross-compile for Windows on Ubuntu 20 LTS?
>
> Don't use -Wbad-function-cast or anything that implies it; or don't use
> -Werror.
>
> I guess you're building from Git rather than from a release? In that
> case more expertise is needed. Try configuring with
> --disable-gcc-warnings, or building with 'WERROR_CFLAGS=', or something
> like that.
>

--0000000000008e2d8f061f791abf
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<p dir=3D"ltr">Thanks, that was helpful. In the meantime I solved it with -=
Wno-bad-function-cast even if I often read, that the warning should not be =
ignored.</p>
<br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">Paul E=
ggert &lt;<a href=3D"mailto:eggert@HIDDEN">eggert@HIDDEN</a>&gt; =
schrieb am Mo., 12. Aug. 2024, 10:23:<br></div><blockquote class=3D"gmail_q=
uote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1e=
x">On 2024-08-11 17:55, Daniel Ruf via GNU gzip discussion and bug reports.=
 <br>
wrote:<br>
&gt; dup2.c:80:11: error: cast from function call of type &#39;intptr_t&#39=
; {aka &#39;long<br>
&gt; long int&#39;} to non-matching type &#39;void *&#39; [-Werror=3Dbad-fu=
nction-cast]<br>
&gt; 80 | if ((HANDLE) _get_osfhandle (fd) =3D=3D INVALID_HANDLE_VALUE)<br>
&gt; | ^<br>
&gt; cc1: all warnings being treated as errors<br>
&gt; make[3]: *** [Makefile:2576: libgzip_a-dup2.o] Error 1<br>
&gt; make[3]: Leaving directory<br>
&gt; &#39;/home/runner/work/gzip-windows-build/gzip-windows-build/gzip/lib&=
#39;<br>
&gt; <br>
&gt; What are the correct steps to cross-compile for Windows on Ubuntu 20 L=
TS?<br>
<br>
Don&#39;t use -Wbad-function-cast or anything that implies it; or don&#39;t=
 use <br>
-Werror.<br>
<br>
I guess you&#39;re building from Git rather than from a release? In that <b=
r>
case more expertise is needed. Try configuring with <br>
--disable-gcc-warnings, or building with &#39;WERROR_CFLAGS=3D&#39;, or som=
ething <br>
like that.<br>
</blockquote></div>

--0000000000008e2d8f061f791abf--
Information forwarded to bug-gzip@HIDDEN:
bug#72587; Package gzip. Full text available.

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Subject: Re: bug#72587: Getting compilation error
To: Daniel Ruf <ruf.shagentur@HIDDEN>, 72587 <at> debbugs.gnu.org
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On 2024-08-11 17:55, Daniel Ruf via GNU gzip discussion and bug reports. 
wrote:
> dup2.c:80:11: error: cast from function call of type 'intptr_t' {aka 'long
> long int'} to non-matching type 'void *' [-Werror=bad-function-cast]
> 80 | if ((HANDLE) _get_osfhandle (fd) == INVALID_HANDLE_VALUE)
> | ^
> cc1: all warnings being treated as errors
> make[3]: *** [Makefile:2576: libgzip_a-dup2.o] Error 1
> make[3]: Leaving directory
> '/home/runner/work/gzip-windows-build/gzip-windows-build/gzip/lib'
> 
> What are the correct steps to cross-compile for Windows on Ubuntu 20 LTS?

Don't use -Wbad-function-cast or anything that implies it; or don't use 
-Werror.

I guess you're building from Git rather than from a release? In that 
case more expertise is needed. Try configuring with 
--disable-gcc-warnings, or building with 'WERROR_CFLAGS=', or something 
like that.
Information forwarded to bug-gzip@HIDDEN:
bug#72587; Package gzip. Full text available.

Message received at submit <at> debbugs.gnu.org:


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--00000000000042be6d061f71f295
Content-Type: text/plain; charset="UTF-8"

I'm trying to cross-compile on Ubuntu for Windows hosts using ./configure
--quiet --host=x86_64-w64-mingw32

But my build fails:

dup2.c: In function 'ms_windows_dup2':
dup2.c:80:11: error: cast from function call of type 'intptr_t' {aka 'long
long int'} to non-matching type 'void *' [-Werror=bad-function-cast]
80 | if ((HANDLE) _get_osfhandle (fd) == INVALID_HANDLE_VALUE)
| ^
cc1: all warnings being treated as errors
make[3]: *** [Makefile:2576: libgzip_a-dup2.o] Error 1
make[3]: Leaving directory
'/home/runner/work/gzip-windows-build/gzip-windows-build/gzip/lib'

What are the correct steps to cross-compile for Windows on Ubuntu 20 LTS?

--00000000000042be6d061f71f295
Content-Type: text/html; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable

<div dir=3D"auto"><div dir=3D"auto"><div>I&#39;m trying to cross-compile on=
 Ubuntu for Windows hosts using ./configure --quiet --host=3Dx86_64-w64-min=
gw32</div><div dir=3D"auto"><br></div><div dir=3D"auto">But my build fails:=
</div><div dir=3D"auto"><br></div><div dir=3D"auto">dup2.c: In function &#3=
9;ms_windows_dup2&#39;:

  </div>
</div><div dir=3D"auto">
  <div>
    </div></div><div dir=3D"auto"><div>
    dup2.c:80:11: error: cast from function call of type &#39;intptr_t&#39;=
 {aka &#39;long long int&#39;} to non-matching type &#39;void *&#39; [-Werr=
or=3Dbad-function-cast]

  </div>
</div><div dir=3D"auto">
  <div>
    </div></div><div dir=3D"auto"><div>
       80 |       if ((HANDLE) _get_osfhandle (fd) =3D=3D INVALID_HANDLE_VA=
LUE)

  </div>
</div><div dir=3D"auto">
  <div>
    </div></div><div dir=3D"auto"><div>
          |           ^

  </div>
</div><div dir=3D"auto">
  <div>
    </div></div><div dir=3D"auto"><div>
    cc1: all warnings being treated as errors

  </div>
</div><div dir=3D"auto">
  <div>
    </div></div><div dir=3D"auto"><div>
    make[3]: *** [Makefile:2576: libgzip_a-dup2.o] Error 1

  </div>
</div><div dir=3D"auto">
  <div>
    </div></div>
    make[3]: Leaving directory &#39;/home/runner/work/gzip-windows-build/gz=
ip-windows-build/gzip/lib&#39;<div dir=3D"auto"><br></div><div dir=3D"auto"=
>What are the correct steps to cross-compile for Windows on Ubuntu 20 LTS?<=
/div></div>

--00000000000042be6d061f71f295--
Acknowledgement sent to Daniel Ruf <ruf.shagentur@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-gzip@HIDDEN. Full text available.
Report forwarded to bug-gzip@HIDDEN:
bug#72587; Package gzip. Full text available.
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