The oldest llvm linked to the build is 21. I think this check can go.
Index: clang.port.mk
===================================================================
RCS file: /cvs/ports/lang/clang/clang.port.mk,v
diff -u -p -r1.46 clang.port.mk
--- clang.port.mk 2 Jun 2026 12:43:25 -0000 1.46
+++ clang.port.mk 23 Jun 2026 15:22:10 -0000
@@ -11,10 +11,6 @@ MODCLANG_BUILDDEP ?= Yes
MODCLANG_RUNDEP ?= No
MODCLANG_CPPLIB ?= No
-.if ${MODCLANG_CPPLIB:L} == "yes" && ${MODCLANG_VERSION} < 19
-ERRORS += "Fatal: ${MODCLANG_LIB_DEPENDS} does not support ports libc++"
-.endif
-
.if ${MODCLANG_RUNDEP:L} == "yes"
RUN_DEPENDS+= ${MODCLANG_RUN_DEPENDS}
.endif
