Re: [Mingw-cross-env-list] 64-bit

[William]

On 06/18/2012 07:28 PM, Lothar May wrote:
> Hi,
>
> 2012/6/15 William<address@hidden>:
> > yes,
> > actually there is already something, it is just that it is not pushed to the
> > main branch, I really don't know why.
> > I advise you to follow instructions from:
> > http://mxe.cc/
> >
> > Instead of dowloading this branch :
> > git clone https://github.com/mxe/mxe.git
> >
> > you can use this branch, which is an upgrade of mxe for really having multi
> > targets available :
> > https://github.com/tonytheodore/mxe.git
> > You will have to change the target, in the file settings.mk (this file
> > appears if you run quickly make and then Ctrl c straight))
> > I don't have my pc here, but in this file put the following line :
> > TARGET = x86_64-w64-mingw32
> > (instead of i686-pc-mingw32 which is for 32bits). For the rest, follow
> > instructions from http://mxe.cc
> >
> > If something goes wrong, which is very likely, submit your problems to this
> > mailing list or to the bug report in github. It is also very likely that it
> > could be solved easily.
> I tried to do exactly that, but encountered some strange behaviour.
> Even though I set the target in the settings.mk file, it seems to
> build all three targets i686-static, i686-dynamic and x86_64. I tried
> to build qt, but it fails for target i686-dynamic.
>
> [...]
> /opt/mingw-w64/usr/i686-dynamic-mingw32/lib/libmng.a(libmng_jpeg.o):libmng_jpeg.c:(.text+0x1fa2):
> undefined reference to `jpeg_destroy_decompress'
> collect2: error: ld returned 1 exit status
>
> make[6]: *** [../../../../plugins/imageformats/qmng4.dll] Error 1
> make[6]: Leaving directory
> `/opt/mingw-w64/tmp-qt-i686-dynamic-mingw32/qt-everywhere-opensource-src-4.8.1/src/plugins/imageformats/mng'
> make[5]: *** [release] Error 2
> [...]
>
> It seems that some libjpeg dependency is missing there.
>
> However, is there any way to *only* build for x86_64 target?
>
> Best regards,
> Lothar

Lothar,
if you look into 'Makefile', which is THE file that invokes everything, 
you will see that it is not "TARGET" that you need to define, as I told 
you before, but "TARGETS". So the line to write into settings.mk (that 
overloads variables from the Makefile) is :
"TARGETS := x86_64-static-mingw32"

This error appeared while building in dynamic mode 
(x86_64-dynamic-mingw32), which is much experimental than the static 
mode.If this is no problem for you, you should first try 
"x86_64-static-mingw32", which is much more likely to succeed.

By the way I am unfortunately personnaly not able to solve this specific 
error... To solve this precise error, either wait for an answer on this 
mailing list, or suscribe to github and file a bug report.

Regards,
William