Il 18/05/20 01:32, Hongyi Zhao ha scritto:
# The following step failed for Ubuntu 20.04: $ make -j4 ../../include/QtCore/../../src/corelib/tools/qpair.h:62:20: note: because ‘QPair<int, int>’ has user-provided ‘QPair<T1, T2>& QPair<T1, T2>::operator=(const QPair<T1, T2>&) [with T1 = int; T2 = int]’ 62 | QPair<T1, T2> &operator=(const QPair<T1, T2> &other) | ^~~~~~~~ make[1]: *** [Makefile:18175: .obj/release-shared/qsslsocket_openssl.o] Error 1 make[1]: Leaving directory '/home/werner/Downloads/qt-everywhere-opensource-src-4.8.7/src/network' make: *** [Makefile:278: sub-network-make_default-ordered] Error 2
This is missing the actual error messages, please run make -j1 and paste everything. From the text, it looks like a deprecation warning for a custom declared operator=, but that should be just a warning and not an error. If some -Werror is in place, find the way to remove it.
The actual error seems to be related to OpenSSL, which you should just disable via the respective configure switch (Qt 4 does not support OpenSSL 1.1).
HTH, -- Giuseppe D'Angelo | giuseppe.dang...@kdab.com | Senior Software Engineer KDAB (France) S.A.S., a KDAB Group company Tel. France +33 (0)4 90 84 08 53, http://www.kdab.com KDAB - The Qt, C++ and OpenGL Experts
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