build, qt: Fix Windows cross-compiling with Qt 5.15 #24131
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Correct. But PR #22093 branch was not rebased on top of #23489: bitcoin/depends/packages/qt.mk Line 2 in 2fda0c7 I apologize for that.
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This change allows to drop the `update-alternatives` step if the `g++-mingw-w64-x86-64` package has been installed.
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Rebased 9ab1eca -> 9796dca (pr24131.01 -> pr24131.02) due to the conflict with #24212. |
| @@ -163,6 +163,7 @@ $(package)_config_opts_mingw32 += -no-dbus | |||
| $(package)_config_opts_mingw32 += -no-freetype | |||
| $(package)_config_opts_mingw32 += -xplatform win32-g++ | |||
| $(package)_config_opts_mingw32 += "QMAKE_CFLAGS = '$($(package)_cflags) $($(package)_cppflags)'" | |||
| $(package)_config_opts_mingw32 += "QMAKE_CXX = '$($(package)_cxx)'" | |||
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I confirm this single line fixes the Qt build issue with Mingw for me. The rest of the PR is not required for the fix, but still worth merging in.
However, when I inspect Makefile.Release files created by qmake I see the following:
CC = @echo compiling $< && x86_64-w64-mingw32-gcc
CXX = @echo compiling $< && x86_64-w64-mingw32-g++-posix
I feel we should do the same for CC so this won't explode in the future. What do you think?
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Yes, I've noticed this as well when was working on this PR.
I'm not aware of difference between x86_64-w64-mingw32-gcc-posix and x86_64-w64-mingw32-gcc-win32.
Anyway, on the master branch we actually use the latter. So it was not my intention to change the status quo in this PR.
9796dca doc: Install only "-posix" MinGW compiler when possible (Hennadii Stepanov) 0bbae23 ci: Drop no longer needed `update-alternatives` (Hennadii Stepanov) 01d1845 build, qt: Specify QMAKE_CXX explicitly (Hennadii Stepanov) Pull request description: While changes introduced in bitcoin#22093 worked fine with Qt 5.12, after bumping Qt up to 5.15 the cross-compiling of `qt` package for Windows fails with `error: ‘mutex’ in namespace ‘std’ does not name a type`. The first commit fixes this bug. The second commit cleans up a related CI script. The third commit improves related docs (see bitcoin#22093 (comment)). ACKs for top commit: prusnak: ACK 9796dca Tree-SHA512: 0dc46c5dfab85bd6d2901052cd630e86f9b4e09c08ef87136b44ddecb1783cdf3cd0a6e67b95ac7a78da24cd7adedc88745f61f9a8d9993fbff26d33bf88d874
While changes introduced in #22093 worked fine with Qt 5.12, after bumping Qt up to 5.15 the cross-compiling of
qtpackage for Windows fails witherror: ‘mutex’ in namespace ‘std’ does not name a type.The first commit fixes this bug.
The second commit cleans up a related CI script.
The third commit improves related docs (see #22093 (comment)).