https://bugs.kde.org/show_bug.cgi?id=428807
Bug ID: 428807
Summary: Duplicate symbol linker error under clang/macOS
Product: frameworks-kio
Version: 5.75.0
Platform: Compiled Sources
OS: macOS
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: kio-bugs-n...@kde.org
Reporter: m...@dawidwrobel.com
CC: kdelibs-b...@kde.org
Target Milestone: ---
Created attachment 133120
--> https://bugs.kde.org/attachment.cgi?id=133120&action=edit
vcpkg build output
SUMMARY
I am having trouble getting kio to compile under macOS. I am working on vcpkg
portfile for it and it fails with 'duplicate symbol' error. While I know it
compiles fine under craft, AFIK it doesn't use most recent macOS
version/SDK/Xcode. It may also be that vcpkg has toolchain configured to be
less lenient towards common errors.
Specifically the error reported is:
duplicate symbol 'operator>>(QDBusArgument const&, QSslCertificate&)' in:
src/kssld/CMakeFiles/kssld.dir/kssld.cpp.o
lib/libKF5KIOCore.a(ksslcertificatemanager.cpp.o)
duplicate symbol 'operator<<(QDBusArgument&, QSslCertificate const&)' in:
src/kssld/CMakeFiles/kssld.dir/kssld.cpp.o
lib/libKF5KIOCore.a(ksslcertificatemanager.cpp.o)
duplicate symbol 'operator>>(QDBusArgument const&, KSslCertificateRule&)' in:
src/kssld/CMakeFiles/kssld.dir/kssld.cpp.o
lib/libKF5KIOCore.a(ksslcertificatemanager.cpp.o)
duplicate symbol 'operator<<(QDBusArgument&, KSslCertificateRule const&)' in:
src/kssld/CMakeFiles/kssld.dir/kssld.cpp.o
lib/libKF5KIOCore.a(ksslcertificatemanager.cpp.o)
duplicate symbol 'operator>>(QDBusArgument const&, QSslError::SslError&)' in:
src/kssld/CMakeFiles/kssld.dir/kssld.cpp.o
lib/libKF5KIOCore.a(ksslcertificatemanager.cpp.o)
duplicate symbol 'operator<<(QDBusArgument&, QSslError::SslError const&)' in:
src/kssld/CMakeFiles/kssld.dir/kssld.cpp.o
lib/libKF5KIOCore.a(ksslcertificatemanager.cpp.o)
ld: 6 duplicate symbols for architecture x86_64
I did some investigation and here's what follows:
- the operators above are declared *and defined* in kssld_dbusmetatypes.h
- the header is in turn included by kssld_interface.h and kssld_adaptor.h,
which are respectively included by the ksslcertificatemanager.cpp and
kissed.cpp, which the linker is complaining about.
My rusty C++ tells me that the linker complains because the body of the
operators is implemented in the kssld_dbusmetatypes header file. Despite my
rather limited knowledge of Qt and its metatype macros, I tried to separate the
implementation from the header, but failed miserably.
Note that 5.73 had an identical issue.
STEPS TO REPRODUCE
1. You can try to build the vcpkg package using
https://github.com/microsoft/vcpkg/pull/13469
SOFTWARE/OS VERSIONS
macOS: 10.15.7 (19H2)
KDE Frameworks Version: 5.75
Qt Version: 5.15
Apple clang version 11.0.3 (clang-1103.0.32.62)
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