devel/llvm-devel: new snapshot, library depends

Don't link openmp with libffi.

Reformat long or multi-line OPTION_FOO variables.

PR:		273801
Co-authored-by:	Ivan Rozhuk <rozhuk.im@gmail.com>

devel/llvm-devel/Makefile

@@ -166,7 +166,9 @@ LLDB_USE=		GNOME=libxml2
 LLDB_VARS=		_USES_PYTHON=python
 MLIR_DESC=		Multi-Level Intermediate Representation
 OPENMP_DESC=		Install libomp, the LLVM OpenMP runtime library
-OPENMP_CMAKE_ON=	-DLIBOMPTARGET_BUILD_DEVICERTL_BCLIB=OFF
+OPENMP_CMAKE_ON=	-DLIBOMPTARGET_BUILD_DEVICERTL_BCLIB=OFF \
+			-DLIBOMPTARGET_DEP_LIBFFI_INCLUDE_DIR="" \
+			-DLIBOMPTARGET_DEP_LIBFFI_LIBRARIES=""
 OPENMP_PORTDOCS=	openmp
 POLLY_DESC=		Polyhedral loop and data-locality optimizer
 POLLY_PORTDOCS=	polly

devel/llvm-devel/Makefile.snapshot

@@ -4,6 +4,6 @@
 #
 LLVM_MAJOR=	18
 LLVM_RELEASE=	${LLVM_MAJOR}.0.0
-SNAPDATE=	20230829
+SNAPDATE=	20230921
 
-LLVM_PROJECT_COMMIT=		6a6f3c99a29cfb57ad2011f1601b249871053da6
+LLVM_PROJECT_COMMIT=		f5f7e2a336ce657c20859295bbf542f71cdf4d3e

devel/llvm-devel/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1693327477
-SHA256 (llvm-llvm-project-18.0.d20230829-6a6f3c99a29cfb57ad2011f1601b249871053da6_GH0.tar.gz) = 681a47d3d533734f687aa01c83567b1b85c570425a3a3f4ea061e853e6473811
-SIZE (llvm-llvm-project-18.0.d20230829-6a6f3c99a29cfb57ad2011f1601b249871053da6_GH0.tar.gz) = 196962724
+TIMESTAMP = 1695313258
+SHA256 (llvm-llvm-project-18.0.d20230921-f5f7e2a336ce657c20859295bbf542f71cdf4d3e_GH0.tar.gz) = ebbba31bc7575e60e8875763ebf3387c373b24c0eb89d969bbe7b15c68c03e65
+SIZE (llvm-llvm-project-18.0.d20230921-f5f7e2a336ce657c20859295bbf542f71cdf4d3e_GH0.tar.gz) = 197897029

devel/llvm-devel/files/patch-clang_lib_Headers_CMakeLists.txt

@@ -1,17 +1,31 @@
 --- clang/lib/Headers/CMakeLists.txt.orig
 +++ clang/lib/Headers/CMakeLists.txt
-@@ -6,19 +6,10 @@
+@@ -6,33 +6,9 @@
    float.h
    inttypes.h
    iso646.h
 -  limits.h
    module.modulemap
 -  stdalign.h
 -  stdarg.h
+-  __stdarg___gnuc_va_list.h
+-  __stdarg___va_copy.h
+-  __stdarg_va_arg.h
+-  __stdarg_va_copy.h
+-  __stdarg_va_list.h
 -  stdatomic.h
 -  stdbool.h
 -  stddef.h
-   __stddef_max_align_t.h
+-  __stddef_max_align_t.h
+-  __stddef_null.h
+-  __stddef_nullptr_t.h
+-  __stddef_offsetof.h
+-  __stddef_ptrdiff_t.h
+-  __stddef_rsize_t.h
+-  __stddef_size_t.h
+-  __stddef_unreachable.h
+-  __stddef_wchar_t.h
+-  __stddef_wint_t.h
 -  stdint.h
 -  stdnoreturn.h
    tgmath.h