All three ports lldb complain about symbol size mismatching:
lldb:/usr/lib/libreadline.so.6.0: /usr/lib/libedit.so.7.0 : WARNING: symbol(emacs_meta_keymap) size mismatch, relink your program
lldb:/usr/lib/libreadline.so.6.0: /usr/lib/libedit.so.7.0 : WARNING: symbol(emacs_standard_keymap) size mismatch, relink your program
lldb:/usr/lib/libreadline.so.6.0: /usr/lib/libedit.so.7.0 : WARNING: symbol(emacs_ctlx_keymap) size mismatch, relink your program

sthen@ and others on icb diagnosed this was due to python using
base libreadline.so and llvm/lldb using base libedit.so which have
a conflicting symbol size for KEYMAP_ENTRY_ARRAY. Fix by switchig
llvm & lldb to use libreadline.so. 

okay?

Index: Makefile.inc
===================================================================
RCS file: /cvs/ports/devel/llvm/Makefile.inc,v
diff -u -p -u -r1.29 Makefile.inc
--- Makefile.inc	23 Feb 2026 14:17:52 -0000	1.29
+++ Makefile.inc	9 Mar 2026 22:46:22 -0000
@@ -55,6 +55,8 @@ LIBCPP_PACKAGE=		-libcxx
 # is set to __E${LLVM_MAJOR} to avoid conflicts with base libc++
 CONFIGURE_ARGS +=	\
 	-DLLVM_ENABLE_RUNTIMES="libcxx;libcxxabi;libunwind" \
+	-DLLVM_ENABLE_LIBEDIT=OFF \
+	-DLLDB_ENABLE_LIBEDIT=OFF \
 	-DLIBCXX_ABI_NAMESPACE="__E${LLVM_MAJOR}" \
 	-DLIBCXX_ENABLE_STATIC=OFF \
 	-DLIBCXX_INSTALL_LIBRARY_DIR="lib" \
Index: 19/Makefile
===================================================================
RCS file: /cvs/ports/devel/llvm/19/Makefile,v
diff -u -p -u -r1.23 Makefile
--- 19/Makefile	23 Feb 2026 18:57:00 -0000	1.23
+++ 19/Makefile	9 Mar 2026 22:46:22 -0000
@@ -2,9 +2,9 @@ LLVM_MAJOR =	19
 LLVM_VERSION =	${LLVM_MAJOR}.1.7
 LLVM_PKGSPEC =	<20
 
-REVISION-main =		14
+REVISION-main =		15
 REVISION-libcxx =	1
-REVISION-lldb =		2
+REVISION-lldb =		3
 REVISION-python =	2
 
 SHARED_LIBS +=	LLVM		0.0 \
Index: 20/Makefile
===================================================================
RCS file: /cvs/ports/devel/llvm/20/Makefile,v
diff -u -p -u -r1.14 Makefile
--- 20/Makefile	23 Feb 2026 18:57:00 -0000	1.14
+++ 20/Makefile	9 Mar 2026 22:46:22 -0000
@@ -5,9 +5,9 @@ LLVM_MAJOR =	20
 LLVM_VERSION =	${LLVM_MAJOR}.1.8
 LLVM_PKGSPEC =	>=20,<21
 
-REVISION-main =		5
+REVISION-main =		6
 REVISION-libcxx =	0
-REVISION-lldb =		0
+REVISION-lldb =		1
 REVISION-python =	1
 
 SHARED_LIBS +=	LLVM		0.0 \
Index: 21/Makefile
===================================================================
RCS file: /cvs/ports/devel/llvm/21/Makefile,v
diff -u -p -u -r1.17 Makefile
--- 21/Makefile	23 Feb 2026 18:57:00 -0000	1.17
+++ 21/Makefile	9 Mar 2026 22:46:22 -0000
@@ -5,8 +5,8 @@ LLVM_MAJOR =	21
 LLVM_VERSION =	${LLVM_MAJOR}.1.8
 LLVM_PKGSPEC =	>=21,<22
 
-REVISION-main =		2
-REVISION-lldb =		1
+REVISION-main =		3
+REVISION-lldb =		2
 REVISION-libcxx =	1
 REVISION-python =	2