I have not run this through a build yet but I believe this is what is necessary.

I was wondering why a projects compiler checks were failing for SVE but the
commit message gave me a clue and sure enough our local build bits were
missing installing the header once we jumped past the 14 release. Copying
the header from the port resolved the issue.


Index: gnu/usr.bin/clang/include/clang/intrin/Makefile
===================================================================
RCS file: /cvs/src/gnu/usr.bin/clang/include/clang/intrin/Makefile,v
retrieving revision 1.27
diff -u -p -u -p -r1.27 Makefile
--- gnu/usr.bin/clang/include/clang/intrin/Makefile	17 Dec 2024 13:22:38 -0000	1.27
+++ gnu/usr.bin/clang/include/clang/intrin/Makefile	9 Mar 2025 21:43:32 -0000
@@ -29,6 +29,9 @@ GEN+=		arm_bf16.h
 GEN+=		arm_mve.h
 GEN+=		arm_cde.h
 HEADERS+=	arm_acle.h arm_cmse.h ${GEN}
+.if ${MACHINE_ARCH} == "aarch64"
+HEADERS+=	arm_neon_sve_bridge.h
+.endif
 .elif ${MACHINE_ARCH} == "amd64" || ${MACHINE_ARCH} == "i386"
 HEADERS+=	__wmmintrin_aes.h \
 		__wmmintrin_pclmul.h \
Index: distrib/sets/lists/comp/clang.arm64
===================================================================
RCS file: /cvs/src/distrib/sets/lists/comp/clang.arm64,v
retrieving revision 1.43
diff -u -p -u -p -r1.43 clang.arm64
--- distrib/sets/lists/comp/clang.arm64	27 Jan 2024 00:12:34 -0000	1.43
+++ distrib/sets/lists/comp/clang.arm64	9 Mar 2025 21:43:32 -0000
@@ -2881,6 +2881,7 @@
 ./usr/lib/clang/16/include/arm_fp16.h
 ./usr/lib/clang/16/include/arm_mve.h
 ./usr/lib/clang/16/include/arm_neon.h
+./usr/lib/clang/16/include/arm_neon_sve_bridge.h
 ./usr/lib/clang/16/include/arm_sve.h
 ./usr/lib/clang/16/include/intrin.h
 ./usr/lib/clang/16/include/module.modulemap