src.conf: Add WITH_LLVM_LINK_STATIC_LIBRARIES build knob

In commit 2e47f35be5 libllvm, libclang and liblldb were converted into
private shared libraries. This allowed clang, lld, lldb, and other llvm
tools to be linked against these shared libraries, which makes them
smaller and avoids duplication.

However, this also comes at the cost of some performance, since the
dynamic libraries are quite large, and contain lots of long symbols
(mangled C++ identifiers).

Add a WITH_LLVM_LINK_STATIC_LIBRARIES build knob that can be used to go
back to the previous behavior: libllvm, libclang and liblldb are built
as internal static libraries, i.e. only available during buildworld, and
fully linked into the various executables such as clang, lld, etc.

PR:		287447
Reviewed by:	emaste
MFC after:	1 week
Differential Revision: https://reviews.freebsd.org/D50956

This commit is contained in:

Dimitry Andric

2025-06-18 12:06:25 +02:00

parent 5819f8b285

commit 8d5a11cd01

13 changed files with 61 additions and 17 deletions

									
										share/mk/src.opts.mk
									
		+1
		
												View File
												
				@@ -213,6 +213,7 @@ __DEFAULT_NO_OPTIONS = \

				    LOADER_VERBOSE \

				    LOADER_VERIEXEC_PASS_MANIFEST \

				    LLVM_FULL_DEBUGINFO \

				    LLVM_LINK_STATIC_LIBRARIES \

				    MALLOC_PRODUCTION \

				    OFED_EXTRA \

				    OPENLDAP \