[cmake] Explicitly disable download step

Fixes the following on cmake version 3.24.2:
'tools/clang/runtime/compiler-rt-stamps/compiler-rt-source_dirinfo.txt',
needed by 'tools/clang/runtime/compiler-rt-stamps/compiler-rt-download',
missing and no known rule to make it

Maybe related to https://cmake.org/cmake/help/latest/release/3.24.html#modules

diff --git a/clang/CMakeLists.txt b/clang/CMakeLists.txt
index 1fff005..6a72204 100644 (file)
--- a/clang/CMakeLists.txt
+++ b/clang/CMakeLists.txt
@@ -804,6 +804,7 @@ if (CLANG_ENABLE_BOOTSTRAP)
                                    --config ${build_configuration}
                                    ${build_tool_args}
     INSTALL_COMMAND ""
+    DOWNLOAD_COMMAND ""
     STEP_TARGETS configure build
     USES_TERMINAL_CONFIGURE 1
     USES_TERMINAL_BUILD 1
@@ -915,6 +916,7 @@ if (CLANG_BOLT_INSTRUMENT AND NOT LLVM_BUILD_INSTRUMENTED)
                                    --config ${build_configuration}
                                    --target ${CLANG_BOLT_INSTRUMENT_TARGETS}
     INSTALL_COMMAND ""
+    DOWNLOAD_COMMAND ""
     STEP_TARGETS configure build
     USES_TERMINAL_CONFIGURE 1
     USES_TERMINAL_BUILD 1

diff --git a/compiler-rt/cmake/Modules/AddCompilerRT.cmake b/compiler-rt/cmake/Modules/AddCompilerRT.cmake
index 2771a40..13bbcf2 100644 (file)
--- a/compiler-rt/cmake/Modules/AddCompilerRT.cmake
+++ b/compiler-rt/cmake/Modules/AddCompilerRT.cmake
@@ -698,6 +698,7 @@ macro(add_custom_libcxx name prefix)
                -DLIBCXX_ENABLE_STATIC_ABI_LIBRARY=ON
                ${LIBCXX_CMAKE_ARGS}
     INSTALL_COMMAND ""
+    DOWNLOAD_COMMAND ""
     STEP_TARGETS configure build
     BUILD_ALWAYS 1
     USES_TERMINAL_CONFIGURE 1