From 9cb9a97e44130e17e96f994c3e594aba69ea1ad5 Mon Sep 17 00:00:00 2001 From: Petr Hosek Date: Fri, 5 Jul 2024 22:56:15 -0700 Subject: [CMake] Use Clang to infer the target triple (#89425) When using Clang as a compiler, use Clang to normalize the triple that's used to construct path for runtime library build and install paths. This ensures that paths are consistent and avoids the issue where the build uses a different triple spelling. Differential Revision: https://reviews.llvm.org/D140925 --- runtimes/CMakeLists.txt | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'runtimes') diff --git a/runtimes/CMakeLists.txt b/runtimes/CMakeLists.txt index 24f485116959..830165c799c2 100644 --- a/runtimes/CMakeLists.txt +++ b/runtimes/CMakeLists.txt @@ -183,6 +183,25 @@ message(STATUS "LLVM default target triple: ${LLVM_DEFAULT_TARGET_TRIPLE}") set(LLVM_TARGET_TRIPLE "${LLVM_DEFAULT_TARGET_TRIPLE}") +if(CMAKE_C_COMPILER_ID MATCHES "Clang") + set(option_prefix "") + if (CMAKE_C_SIMULATE_ID MATCHES "MSVC") + set(option_prefix "/clang:") + endif() + set(print_target_triple ${CMAKE_C_COMPILER} ${option_prefix}--target=${LLVM_DEFAULT_TARGET_TRIPLE} ${option_prefix}-print-target-triple) + execute_process(COMMAND ${print_target_triple} + RESULT_VARIABLE result + OUTPUT_VARIABLE output + OUTPUT_STRIP_TRAILING_WHITESPACE) + if(result EQUAL 0) + set(LLVM_DEFAULT_TARGET_TRIPLE ${output}) + else() + string(REPLACE ";" " " print_target_triple "${print_target_triple}") + # TODO(#97876): Report an error. + message(WARNING "Failed to execute `${print_target_triple}` to normalize target triple.") + endif() +endif() + option(LLVM_INCLUDE_TESTS "Generate build targets for the runtimes unit tests." ON) option(LLVM_INCLUDE_DOCS "Generate build targets for the runtimes documentation." ON) option(LLVM_ENABLE_SPHINX "Use Sphinx to generate the runtimes documentation." OFF) -- cgit v1.2.3