git: 3e5360df3584 - main - qt-dist.mk: suppress linker version script errors with lld >= 17

The branch main has been updated by dim:

URL: https://cgit.FreeBSD.org/ports/commit/?id=3e5360df35848a1ad8c5edae83a0a9cdfd6bb775

commit 3e5360df35848a1ad8c5edae83a0a9cdfd6bb775
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2023-09-21 08:40:09 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2023-10-06 17:48:52 +0000

    qt-dist.mk: suppress linker version script errors with lld >= 17
    
    Qt uses generated linker version scripts which always have a
    qt_version_tag symbol, but that symbol is only defined in the main Qt
    shared library. For other Qt components, this leads to lld >= 17
    erroring out due to the symbol being undefined. Suppress these errors
    from qt-dist.mk, so we don't have to patch each individual port.
    
    This affects at least:
    * devel/qt5-dbus
    * net/qt5-network
    * databases/qt5-sql
    
    which were the first ones to fall over with a clang+lld 17 poudriere
    bulk run.
    
    For reference, the error you would see looks like:
    
      ...
      c++ -Wl,--as-needed -fstack-protector-strong -Wl,--no-undefined -Wl,--version-script,QtDBus.version -pthread -Wl,-rpath,/usr/local/lib/qt5 -shared -Wl,-Bsymbolic-functions -Wl,-soname,libQt5DBus.so.5 -o libQt5DBus.so.5.15.8 .obj/qdbusconnection.o  .obj/qdbusconnectioninterface.o  .obj/qdbuserror.o  .obj/qdbusintegrator.o  .obj/qdbusmessage.o  .obj/qdbusserver.o  .obj/qdbusabstractinterface.o  .obj/qdbusinterface.o  .obj/qdbusxmlparser.o  .obj/qdbusutil.o  .obj/qdbusintrospection.o  .obj/qdbusabstractadaptor.o  .obj/qdbusinternalfilters.o  .obj/qdbusmetaobject.o  .obj/qdbusxmlgenerator.o  .obj/qdbusmisc.o  .obj/qdbusargument.o  .obj/qdbusreply.o  .obj/qdbusmetatype.o  .obj/qdbusextratypes.o  .obj/qdbuscontext.o  .obj/qdbuspendingcall.o  .obj/qdbuspendingreply.o  .obj/qdbus_symbols.o  .obj/qdbusservicewatcher.o  .obj/qdbusunixfiledescriptor.o  .obj/qdbusvirtualobject.o  .obj/moc_qdbusconnectioninterface.o  .obj/moc_qdbuserror.o  .obj/moc_qdbusconnection.o  .obj/moc_qdbusabstracta
 daptor.o  .obj/moc_qdbusvirtualobject.o  .obj/moc_qdbusconnection_p.o  .obj/moc_qdbusconnectionmanager_p.o  .obj/moc_qdbuspendingcall_p.o  -L/wrkdirs/usr/ports/devel/qt5-dbus/work/kde-qtbase-5.15.8p157/lib /usr/local/lib/qt5/libQt5Core.so -L/usr/local/lib -ldbus-1
      ld: error: version script assignment of 'Qt_5.15' to symbol 'qt_version_tag' failed: symbol not defined
      c++: error: linker command failed with exit code 1 (use -v to see invocation)
    
    PR:             273992
    Approved by:    maintainer timeout (2 weeks)
    MFH:            2023Q4
---
 Mk/Uses/qt-dist.mk | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Mk/Uses/qt-dist.mk b/Mk/Uses/qt-dist.mk
index 40ae305bdbb1..868eed099a6b 100644
--- a/Mk/Uses/qt-dist.mk
+++ b/Mk/Uses/qt-dist.mk
@@ -181,6 +181,12 @@ EXTRACT_AFTER_ARGS?=	${DISTNAME:S,$,/examples,:S,^,--exclude ,} \
 			--no-same-owner --no-same-permissions
 .  endif # ! ${_QT_VER:M5}
 
+# Qt uses generated linker version scripts which always have a qt_version_tag
+# symbol, but that symbol is only defined in the main Qt shared library. For
+# other Qt components, this leads to lld >= 17 erroring out due to the symbol
+# being undefined. Supress these errors.
+LDFLAGS+=		-Wl,--undefined-version
+
 # Build setup for Qt6
 .  if ${_QT_VER:M6}
 CMAKE_ARGS+=		-DCMAKE_INSTALL_PREFIX=${PREFIX} \