[Interest] iOS libpng conflicts with another lib

[Konstantin Tokarev]

07.02.2018, 16:25, "maitai" <maitai at virtual-winds.org>:
> Yes I know, but if I use jpeg2000 i will have another conflict for sure
> since I do use jpeg2000 lib (and jasper) to decode gribs in my app.

Apple's decoder should not conflict with jasper. However, I would not
recommend to use jasper for anything, it's obsolete and very incomplete
implementation (IIRC it support no extensions from part 2)

 I
> agree Webp is another possibility, since it is also supported by gdal, I
> might gice it a try, thanks.
>
> Le 07-02-2018 13:56, Konstantin Tokarev a écrit :
>>  07.02.2018, 15:46, "maitai" <maitai at virtual-winds.org>:
>>>  Thanks Konstantin for the good advices, I'll keep that in mind if
>>>  finally I decide to give it a try. For the time being I managed to
>>>  cheat
>>>  by using a tif instead of a png, just for iOS.
>>
>>  That's not the best format. Try jpeg2k or webp instead (plugins "webp"
>>  and "macjp2" in qtimageformats module)
>>
>>>  Thanks again
>>>  Philippe.
>>>
>>>  Le 07-02-2018 13:12, Konstantin Tokarev a écrit :
>>>>   07.02.2018, 09:44, "maitai" <maitai at virtual-winds.org>:
>>>>>   Thanks you for your replies
>>>>>
>>>>>   I will decide to compile qt on iOS when I will be retired and
>>>>>  nothing
>>>>>   else to do, too much a pain with lipo and all ;)
>>>>
>>>>   lipo is not hard to use at all, however there should be no need to
>>>>  use
>>>>   it when building Qt.
>>>>
>>>>   Fo example, configure line [1] initiates build for 4 architectures
>>>>   (-arch armv7 -arch arm64 -arch i386 -arch x86_64)
>>>>
>>>>   See build log [2] for example (this is build configuration used for
>>>>   official
>>>>   iOS packages).
>>>>
>>>>   All you need to change is to add -I and -L options to configure to
>>>>   specify
>>>>   location of libpng headers and library. Make sure that configure
>>>>   summary
>>>>   states "Using system libpng .... yes".
>>>>
>>>>   [1] configure -xplatform macx-ios-clang -no-sql-mysql -no-sql-psql
>>>>   -plugin-sql-sqlite -opensource -confirm-license -nomake tests
>>>>  -verbose
>>>>   -prefix /Users/qt/work/install -debug-and-release -static -no-icu
>>>>   -nomake examples
>>>>
>>>>   [2]
>>>>   https://testresults.qt.io/coin/api/results/qt/qtbase/1860a91eeb370b10677cb1813752739361011015/MacOSMacOS_10_12x86_64IOSIOS_ANYmultiClangqtci-macos-10.12-x86_64-8-9dffb3DebugAndRelease_DisableTests_Static/2a48a3b7dcb9652b1532a3ad14de7580b5b9b1ee/build_1517672826/log.txt.gz
>>>
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-- 
Regards,
Konstantin