[cairo] how to build on 32 bit over a 64 bit system

[suzuki toshiya]

Dear Mr. Alfano,

Good to hear that, many thanks for your posting how you resolved your problem!

(BTW, this is the first time for the subscribers to they can guess your platform as RedHat/Fedora-derived system, by using "yum" command)

Regards,
mpsuzuki

On 2021/09/20 23:32, Francesco Alfano wrote:
> I have installed the following packages, in the 32-bit version, and now
> I can compile:
> 
> |# yum install libX11-devel.i686 # yum install libXext-devel.i686 # yum
> install libXrender-devel.i686 # yum install freetype-devel.i686 # yum
> install pixman-devel.i686 # yum install fontconfig-devel.i686 # yum
> install libpng-devel.i686 # yum install libpng12-devel.i686 # yum
> install libxcb-devel.i686 # yum install glib2-devel.i686 # yum install
> librsvg2-devel.i686 librsvg2.i686 # yum install gdk-pixbuf2-devel.i686 #
> yum install pango-devel.i686 # yum install gtk2-devel.i686 |
> 
> 
> 
> Il 20/09/21 14:19, Francesco Alfano ha scritto:
>> I have examined the config.log files both on a native 32-bit machine,
>> where the library compiles correctly, and on the 64-bit machine where
>> I am trying to compile the 32bit version.
>> In the native 32bit machine config.log reports this
>> setting:ac_cv_func_XRenderCreateLinearGradient = yes,
>> in the 64-bit machine ac_cv_func_XRenderCreateLinearGradient = no.
>>
>> Il 20/09/21 13:05, suzuki toshiya ha scritto:
>>> Dear Mr. Alfano,
>>>
>>> Who told you this method for cross building? According to the error
>>> message,
>>>
>>>> /usr/include/X11/extensions/Xrender.h:186:16: note: originally
>>>> defined here
>>>
>>> Looking at the pathname of this header file, the host header file
>>> (for 64 bit
>>> system) is included during the compilation, so the method you were
>>> told could
>>> be incorrect. Please show your error message to the person telling
>>> you do such,
>>> and ask the question what's wrong.
>>>
>>> In my understanding, today, getting a sufficiently powerful machine
>>> and run
>>> a VM which you can install a 32 bit Linux natively, it would be the
>>> easiest
>>> way to build 32 bit cairo on 64 bit machine with smallest headache.
>>> If you
>>> are going to build so big library for a VM, cross build would be
>>> unavoidable,
>>> but I think cairo is not so big. Or, extracting a precompiled
>>> binaries from
>>> the binary packages for 32 bit Linux would be still easier, I think.
>>>
>>> Regards,
>>> mpsuzuki
>>>
>>> On 2021/09/20 19:17, Francesco Alfano wrote:
>>>> I have to compile libcairo-1.14.2 in linux in 32 but format, on a 64
>>>> bit linux system.
>>>>
>>>> I have tried the following commands:
>>>> # ./autogen.sh --host = i386-pc-linux-gnu --build = i386-linux
>>>> CFLAGS = -m32
>>>> # ./configure --prefix = "/ usr / work / libcairo-1.14.2 / compiled
>>>> /" --host = i386-pc-linux-gnu --build = i386-linux CFLAGS = "- m32 -O"
>>>>
>>>> but, after I run make, the compilation returns me as an error:
>>>> In file included from cairo-xlib-private.h: 40: 0,
>>>>                    from cairo-xlib-display.c: 40:
>>>> cairo-xlib-xrender-private.h: 106: 16: error: redefinition of
>>>> 'struct _XLinearGradient'
>>>>    typedef struct _XLinearGradient {
>>>>                   ^
>>>> In file included from cairo-xlib-xrender.h: 45: 0,
>>>>                    from cairo-xlib-xrender-private.h: 53,
>>>>                    from cairo-xlib-private.h: 40,
>>>>                    from cairo-xlib-display.c: 40:
>>>> /usr/include/X11/extensions/Xrender.h:186:16: note: originally
>>>> defined here
>>>>    typedef struct _XLinearGradient {
>>>>                   ^
>>>> In file included from cairo-xlib-private.h: 40: 0,
>>>>                    from cairo-xlib-display.c: 40:
>>>> cairo-xlib-xrender-private.h: 109: 3: error: conflicting types for
>>>> 'XLinearGradient'
>>>>    } XLinearGradient;
>>>>
>>>> How can  build on 32 bit over a 64 bit system ?
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>
>