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From Ivan Zhakov <i...@visualsvn.com>
Subject Re: 1.6 apr/apr-util scope/timetable?
Date Wed, 28 Dec 2016 10:36:24 GMT
On 27 December 2016 at 22:08, William A Rowe Jr <wrowe@rowe-clan.net> wrote:
> On Sat, Dec 24, 2016 at 1:23 AM, Ivan Zhakov <ivan@visualsvn.com> wrote:
>>
>>
>> Regarding my current problem: I'm getting the following when I attempt
>> to build expat:
>> [[[
>> runtestspp.obj : error LNK2019: unresolved external symbol
>> _align_limit_to_full_utf8_characters referenced in function "void
>> __cdecl test_utf8_auto_align(void)" (?test_utf8_auto_align@@YAXXZ)
>> [D:\Ivan\SVN\expat-cmake\runtestspp.vcxproj]
>> ]]]
>
>
> That's a problem, yes. It looks like a possible expat build issue. Seems
> to apply to the expat test suite. You can toggle building tests in expat
> and obtain the necessary libs separately.
>
> I have no such issues; building expat 2.2.0 my working expat is;
>
> cmake -G "NMake Makefiles" -D CMAKE_INSTALL_PREFIX=..\thirdparty \
> -D BUILD_SHARED_LIBS=ON -D CMAKE_BUILD_TYPE=RelWithDebInfo \
> -D CMAKE_COLOR_MAKEFILE=OFF .
> nmake all install
>
I'm using Visual Studio generator. May be this explains the difference.

> I apply one patch to cmake to compile and link RelWithDebInfo correctly
> to emit .pdb's (It hadn't behaved as documented). This all is working
> under both Studio 2010 and 2015.
>
> FWIW - libxml2 is both a supported substitute for expat in apr-2, as well
> as a requirement for mod_proxy_html, which is why I'm leaning toward
> ignoring expat in the future and having both rely exclusively on libxml2.
>
Did you measure libxml2 vs expat performance? Btw Subversion depends
on libexpat directly because APR doesn't provide SAX XML parser
interface.

>> > Agreed. But three years down the road, after the expert who hand-crafted
>> > a
>> > custom .mak solution has moved on to better things and we're on Visual
>> > Studio vNext, I'm guessing you'll find the same thing will happen there
>> > too
>> > -- unless you have a plan in mind to avoid it?
>> >
>> Well, Visual Studio vNext is going to support CMake builds out of the
>> box and it sounds very promising. But I cannot get it work for APR yet
>> :(
>
> Do you have a similar apr example, or is it simply that you got jammed
> in expat and couldn't move forwards?
>
I've just jammed in expat and didn't move forward.

> I also have this which illustrates windows builds;
>
> https://wiki.apache.org/httpd/WindowsTrunkCompilation
>
> Hope that proves interesting/useful.
Thanks for the link. Btw SourceForge now provides URL for unattended
package download. For example the following command downloads libexpat
2.2.0:
$ curl -L -o expat-2.2.0.tar.bz2
https://downloads.sourceforge.net/project/expat/expat/2.2.0/expat-2.2.0.tar.bz2


-- 
Ivan Zhakov

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