Obey FETCHCONTENT_FULLY_DISCONNECTED

[bwarden]

If FETCHCONTENT_FULLY_DISCONNECTED is set, nothing should be trying to use FetchContent anywhere:

llvm/llvm/lib/SYCLNativeCPUUtils/CMakeLists.txt

Lines 35 to 73 in 08a74f9

	if(NATIVECPU_USE_OCK)
	if(NATIVECPU_OCK_USE_FETCHCONTENT)
	set(OCK_GIT_INTERNAL_REPO "https://github.com/uxlfoundation/oneapi-construction-kit.git")
	# commit 652f9943b0bfcf61123a0f82b2bdd499738c5391
	# Merge: c24c971bcb e0f02ae739
	# Author: Colin Davidson <colin.davidson@codeplay.com>
	# Date: Fri Feb 28 15:59:50 2025 +0000
	#
	# Merge pull request #677 from coldav/colin/build_installed_llvm
	#
	# Change llvm over to a choice of install or cache, default PRs to install
	set(OCK_GIT_INTERNAL_TAG 652f9943b0bfcf61123a0f82b2bdd499738c5391)
	# Overwrite OCK_GIT_INTERNAL_REPO/OCK_GIT_INTERNAL_TAG if the corresponding options are set
	if(OCK_GIT_REPO)
	set(OCK_GIT_INTERNAL_REPO "${OCK_GIT_REPO}")
	endif()
	if(OCK_GIT_TAG)
	set(OCK_GIT_INTERNAL_TAG "${OCK_GIT_TAG}")
	endif()
	include(FetchContent)
	FetchContent_Declare(oneapi-ck
	GIT_REPOSITORY "${OCK_GIT_INTERNAL_REPO}"
	GIT_TAG "${OCK_GIT_INTERNAL_TAG}"
	)
	FetchContent_GetProperties(oneapi-ck)
	if(NOT oneapi-ck_POPULATED)
	message(STATUS "Cloning oneAPI Construction Kit from ${OCK_GIT_INTERNAL_REPO}, tag ${OCK_GIT_INTERNAL_TAG}")
	FetchContent_Populate(oneapi-ck)
	message(STATUS "oneAPI Construction Kit cloned in ${oneapi-ck_SOURCE_DIR}")
	set(OCK_SOURCE_DIR_INTERNAL ${oneapi-ck_SOURCE_DIR}/compiler_passes)
	set(OCK_BINARY_DIR_INTERNAL ${oneapi-ck_BINARY_DIR})
	endif()
	elseif(OCK_SOURCE_DIR)
	set(OCK_SOURCE_DIR_INTERNAL "${OCK_SOURCE_DIR}/compiler_passes")
	set(OCK_BINARY_DIR_INTERNAL "${CMAKE_CURRENT_BINARY_DIR}/oneapi-construction-kit")
	else()
	message(FATAL_ERROR "NATIVECPU_OCK_USE_FETCHCONTENT is Off and OCK_SOURCE_DIR not set")
	endif()