java/openjdk{19,20,21}: fix build with lld 17
Building java/openjdk{19,20,21} with lld 17 results in the following link errors:
ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZ21WB_HandshakeWalkStackE16TraceSelfClosure' failed: symbol not defined ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZ24WB_HandshakeReadMonitorsE19ReadMonitorsClosure' failed: symbol not defined ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZ26WB_AsyncHandshakeWalkStackE16TraceSelfClosure' failed: symbol not defined ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZL20reinitialize_itablesvE18ReinitTableClosure' failed: symbol not defined ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN12JvmtiEnvBase27check_for_periodic_clean_upEvE28ThreadInsideIterationClosure' failed: symbol not defined ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN15G1RemSetSummary6updateEvE11CollectData' failed: symbol not defined ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN16SATBMarkQueueSet22set_active_all_threadsEbbE22SetThreadActiveClosure' failed: symbol not defined ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN16SATBMarkQueueSet23abandon_partial_markingEvE25AbandonThreadQueueClosure' failed: symbol not defined ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN18G1ConcurrentRefine30get_and_reset_refinement_statsEvE12CollectStats' failed: symbol not defined ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN19G1DirtyCardQueueSet12abandon_logsEvE23AbandonThreadLogClosure' failed: symbol not defined ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN19G1DirtyCardQueueSet16concatenate_logsEvE27ConcatenateThreadLogClosure' failed: symbol not defined ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN19G1DirtyCardQueueSet30get_and_reset_refinement_statsEvE12CollectStats' failed: symbol not defined ld: error: version script assignment of 'SUNWprivate_1.1' to symbol '_ZTVZN7Threads25change_thread_claim_tokenEvE11ResetClaims' failed: symbol not defined
This is because lld 17 defaults to errors when undefined symbols are
referenced in linker version scripts. The problem is due to the Makefile
JvmMapfile.gmk, which generates a linker version script. It uses "nm
--defined-only" to dump symbols in object files, but this also includes
local (hidden) symbols. Add "--extern-only" to make it only dump global
symbols.
PR: 276425
Approved by: otis (mentor), dim
MFH: 2024Q1
Differential Revision: https://reviews.freebsd.org/D43620