D45233.1783975117.diff
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	diff --git a/lib/libcxxrt/Makefile b/lib/libcxxrt/Makefile
	--- a/lib/libcxxrt/Makefile
	+++ b/lib/libcxxrt/Makefile
	@@ -42,3 +42,13 @@
	.endif

	.include <bsd.lib.mk>
	+
	+# gcc13 doesn't support _Float16 on riscv, powerpc64, and x86 or __int128
	+# on i386. Disable checks for missing symbols to allow this to link.
	+#
	+# XXX: This is a hack that hides an ABI divergence between clang and gcc.
	+.if ${COMPILER_TYPE} == "gcc" && \
	+ (${MACHINE_ARCH} == "amd64" \|\| ${MACHINE_ARCH} == "i386" \|\| \
	+ ${MACHINE_ARCH:Mpowerpc64*} \|\| ${MACHINE_ARCH} == "riscv64")
	+LDFLAGS+= -Wl,--undefined-version
	+.endif