build: patch qt libpng to fix powerpc build #19959
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This is an alternative to bitcoin#19751 that fixes the build without requiring splitting out libpng. This patch can be dropped once we are building qt 5.12.0 or later.
hebasto
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Sep 16, 2020
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ACK f07fb5a, the patch is the same as https://codereview.qt-project.org/gitweb?p=qt/qtbase.git;a=blobdiff;f=src/3rdparty/libpng/libpng.pro;h=a2f56669b47e09629b7a88a0964091404d6a9b06;hp=577b61d833f7842f3f0d6b1c94a3b3920006695c;hb=dc2aead842f4cdf74f9259d3606c53c8bdae2c6b;hpb=ceeecbae510af6e2d1ebbf865761e4761d404033
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f07fb5a build: patch qt libpng to fix powerpc build (fanquake) Pull request description: This is an alternative to bitcoin#19751 that fixes the build without requiring splitting out libpng. This patch can be dropped once we are building qt 5.12.0 or later. One of the [concerns posted in bitcoin#19751](bitcoin#19751 (comment)) was: > the one bundled with Qt is at best a slower "bare minimum". However for our usage, I don't think the performance of libpng is a concern. If it is, I'd like to see some numbers/justification as to why we should be worried about it. This patch should be enough to unblock PowerPC binaries (combined with other changes) for 0.21.0, and for 0.22.0, when we switch to qt 5.15.x in depends, we should be able to drop it. Related upstream issue: https://bugreports.qt.io/browse/QTBUG-66388. ACKs for top commit: laanwj: ACK f07fb5a theuni: ACK f07fb5a. hebasto: ACK f07fb5a, the patch is the same as https://codereview.qt-project.org/gitweb?p=qt/qtbase.git;a=blobdiff;f=src/3rdparty/libpng/libpng.pro;h=a2f56669b47e09629b7a88a0964091404d6a9b06;hp=577b61d833f7842f3f0d6b1c94a3b3920006695c;hb=dc2aead842f4cdf74f9259d3606c53c8bdae2c6b;hpb=ceeecbae510af6e2d1ebbf865761e4761d404033 Tree-SHA512: 865b843f5049eca80215774274fb7ae0dacccc3dd7f4a2eec93a73057115dcea85e715f919f96441424f9dd902dd97f0a238d96d4074babcee66b30577104009
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This is an alternative to #19751 that fixes the build without requiring
splitting out libpng. This patch can be dropped once we are building qt
5.12.0 or later.
One of the concerns posted in #19751 was:
However for our usage, I don't think the performance of libpng is a concern. If it is, I'd like to see some numbers/justification as to why we should be worried about it.
This patch should be enough to unblock PowerPC binaries (combined with other changes) for 0.21.0, and for 0.22.0, when we switch to qt 5.15.x in depends, we should be able to drop it.
Related upstream issue: https://bugreports.qt.io/browse/QTBUG-66388.