libvpx on 10.5 and earlier

[Riccardo Mottola]

Hi Ryan,

On 2017-12-11 22:15:23 +0100 Ryan Schmidt <ryandesign at macports.org> 
wrote:

> 
> According to
> 
> https://github.com/macports/macports-ports/commit/5c48aa5a22139aedc616ff5ee173f9ca021580e0
> 
> support for Mac OS X 10.5 and earlier was removed in libvpx 1.5.0, so 
> you 
> would need to build an earlier version than that.
> 
> https://trac.macports.org/wiki/howto/InstallingOlderPort


I can attempt that, however, also to debug the integrated libvpx of 
TTF/Firefox, I downloaded 1.5 and also latest 1.6.1

I am able to build "off tree" by using the macports clang compiler 
latest libvpx 1.6.1

CC=clang-mp-3.4 CXX=clang++-mp-3.4 ./configure

Builds happily. I tired the testsuite which did take hefty 7h 30' to 
run and downloaded several gigabytes


[==========] 501 tests from 60 test cases ran. (26941271 ms total)
[  PASSED  ] 495 tests.
[  FAILED  ] 6 tests, listed below:
[  FAILED  ] VP8MultiThreaded/TestVectorTest.MD5Match/111, where 
GetParam() = (0x3ab4dc, (0, 2, 0x35a479 pointing to 
"vp80-04-partitions-1405.ivf"))
[  FAILED  ] VP8MultiThreaded/TestVectorTest.MD5Match/161, where 
GetParam() = (0x3ab4dc, (0, 3, 0x35a313 pointing to 
"vp80-03-segmentation-1414.ivf"))
[  FAILED  ] VP8MultiThreaded/TestVectorTest.MD5Match/201, where 
GetParam() = (0x3ab4dc, (0, 4, 0x35a0bf pointing to 
"vp80-00-comprehensive-016.ivf"))
[  FAILED  ] VP8MultiThreaded/TestVectorTest.MD5Match/221, where 
GetParam() = (0x3ab4dc, (0, 4, 0x35a2d7 pointing to 
"vp80-03-segmentation-1410.ivf"))
[  FAILED  ] VP8MultiThreaded/TestVectorTest.MD5Match/281, where 
GetParam() = (0x3ab4dc, (0, 5, 0x35a29b pointing to 
"vp80-03-segmentation-1408.ivf"))
[  FAILED  ] VP8MultiThreaded/TestVectorTest.MD5Match/421, where 
GetParam() = (0x3ab4dc, (0, 7, 0x35a479 pointing to 
"vp80-04-partitions-1405.ivf"))


Maybe this is acceptable? I don't know how it fares on 10.6 and up, 
this is a 32bit build.
What compiler is the port using? Maybe PPC would fail, but intel 
builds.

I also tried compiling even 1.5 with gcc 4.8 and gcc 6, but it fails 
the same way the integrated libvpx of TTF fail.
I looked int othe code and it fails with assembler issues, the 
original coder noted that it is for gcc 4.7 and clang 3.4 up, so it 
should work!
Apparenltly the issue is that our MP cc uses an "old" linker that 
doesn't support those instrucions, there are several posts around. Are 
we?



Riccardo