MacOS Build Error: Qt 5 and 6 Simultaneously Installed.

da2ce7 commented at 10:08 pm on August 28, 2022: none

This error seems to appear when brew install qt@5 is installed at the same time as: brew install qt. (ie, qt version 6):

0% brew list --version | grep qt
1
2qt 6.3.1_1
3qt@5 5.15.5_1

 0Making all in src
 1  CXX      qt/libbitcoinqt_a-bantablemodel.o
 2In file included from qt/bantablemodel.cpp:14:
 3In file included from /usr/local/Cellar/qt@5/5.15.5_1/lib/QtCore.framework/Headers/QLocale:1:
 4/usr/local/Cellar/qt@5/5.15.5_1/lib/QtCore.framework/Headers/qlocale.h:1028:25: error: unknown type name 'QStringRef'; did you mean 'CFStringRef'?
 5    short toShort(const QStringRef &s, bool *ok = nullptr) const;
 6                        ^~~~~~~~~~
 7                        CFStringRef
 8/usr/local/include/QtCore/qdebug.h:531:1: note: 'CFStringRef' declared here
 9Q_FORWARD_DECLARE_CF_TYPE(CFString);
10^
11/usr/local/include/QtCore/qglobal.h:802:77: note: expanded from macro 'Q_FORWARD_DECLARE_CF_TYPE'
12#  define Q_FORWARD_DECLARE_CF_TYPE(type) typedef const struct __ ## type * type ## Ref
13                                                                            ^
14<scratch space>:112:1: note: expanded from here
15CFStringRef
16^

0% git clean -ffxd
1% git rev-parse HEAD
2e191fac4f3c37820f0618f72f0a8e8b524531ab8
3% ./autogen.sh
4% ./configure
5% make

output: https://gist.github.com/da2ce7/c697259e204c961876ad7f7057e95b34

config.log: https://gist.github.com/da2ce7/ec7276de7d0284681cd73b0cdcb90f3b

brew list –version –formulae: https://gist.github.com/da2ce7/25d6473224a1d69a28cf24e44abb55b7

Originally posted by @da2ce7 in #21901 (comment)

hebasto commented at 10:30 pm on August 28, 2022: member

@da2ce7

This error seems to appear when brew install qt@5 is installed at the same time as: brew install qt.

This is unsupported configuration. See: https://github.com/bitcoin/bitcoin/blob/master/doc/build-osx.md#qt

Could be fixed after #25797.

hebasto closed this on Aug 28, 2022

da2ce7 referenced this in commit 94d1505dbe on Aug 29, 2022

luke-jr commented at 1:24 am on September 9, 2022: member

This should be reopened. Unrelated packages shouldn’t break things.

hebasto reopened this on Sep 9, 2022

hebasto added the label macOS on Sep 9, 2022

hebasto added the label Build system on Sep 9, 2022

fanquake commented at 10:25 am on September 9, 2022: member

There’s more to this than just qt5 and qt6 being installed via brew. I’ve tested building on a macOS (M1) system, with both installed, and there are no compilation problems.

hebasto commented at 6:45 pm on September 9, 2022: member

I was going to fix this issue, and already had a draft of the patch, but…

macOS Monterey 12.6 (21G115, Intel):

0% brew list --version | grep qt
1qt 6.3.1_3
2qt@5 5.15.5_2

~~Having the same result as @fanquake:~~

~~there are no compilation problems.~~

~~Definitely, I observed problems in the past, but not now.~~

~~So, @da2ce7 and other devs, who observe such an issue, please provide more details about your systems to let us to reproduce it. Also try to update brew’s packages.~~

EDIT: The build above was configured with --enable-suppress-external-warnings. Without this option I do observe the issue.

hebasto commented at 9:55 pm on September 9, 2022: member

A fix suggested in #26056 (comment).

fanquake closed this on Sep 14, 2022

fanquake referenced this in commit c67d6f5b5f on Sep 14, 2022

sidhujag referenced this in commit f9a8249fff on Sep 14, 2022

bitcoin locked this on Sep 14, 2023

MacOS Build Error: Qt 5 and 6 Simultaneously Installed. #25947