That one is probably my bad, as I tend to write CX11 instead of CXX11 by
default
Index: bsd.port.arch.mk.5
===================================================================
RCS file: /build/data/openbsd/cvs/src/share/man/man5/bsd.port.arch.mk.5,v
diff -u -p -r1.15 bsd.port.arch.mk.5
--- bsd.port.arch.mk.5	24 Oct 2025 08:10:37 -0000	1.15
+++ bsd.port.arch.mk.5	22 Jun 2026 16:35:24 -0000
@@ -84,7 +84,7 @@ It will set up the following variables f
 .It Ev BE_ARCHS
 .It Ev CLANG_ARCHS
 .It Ev COMPILER_VERSION
-.It Ev CX11_ARCHS
+.It Ev CXX11_ARCHS
 .It Ev DEBUGINFO_ARCHS
 .It Ev GCC4_ARCHS
 .It Ev GCC49_ARCHS