llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT--> @llvm/pr-subscribers-libunwind Author: None (llvmbot) <details> <summary>Changes</summary> resolves llvm/llvm-project#<!-- -->81084 --- Full diff: https://github.com/llvm/llvm-project/pull/81085.diff 1 Files Affected: - (modified) libunwind/CMakeLists.txt (+19) ``````````diff diff --git a/libunwind/CMakeLists.txt b/libunwind/CMakeLists.txt index bb1b052f61d875..806d5a783ec39c 100644 --- a/libunwind/CMakeLists.txt +++ b/libunwind/CMakeLists.txt @@ -21,6 +21,7 @@ set(LIBUNWIND_LIBCXX_PATH "${CMAKE_CURRENT_LIST_DIR}/../libcxx" CACHE PATH "Specify path to libc++ source.") include(GNUInstallDirs) +include(CheckSymbolExists) #=============================================================================== # Setup CMake Options @@ -96,6 +97,20 @@ endif() option(LIBUNWIND_HIDE_SYMBOLS "Do not export any symbols from the static library." ${LIBUNWIND_DEFAULT_HIDE_SYMBOLS}) +# If toolchain is FPXX, we switch to FP64 to save the full FPRs. See: +# https://web.archive.org/web/20180828210612/https://dmz-portal.mips.com/wiki/MIPS_O32_ABI_-_FR0_and_FR1_Interlinking +check_symbol_exists(__mips_hard_float "" __MIPSHF) +check_symbol_exists(_ABIO32 "" __MIPS_O32) +if (__MIPSHF AND __MIPS_O32) + file(WRITE ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/mips_is_fpxx.c + "#if __mips_fpr != 0\n" + "# error\n" + "#endif\n") + try_compile(MIPS_FPABI_FPXX ${CMAKE_BINARY_DIR} + ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/mips_is_fpxx.c + CMAKE_FLAGS -DCMAKE_C_LINK_EXECUTABLE='echo') +endif() + #=============================================================================== # Configure System #=============================================================================== @@ -179,6 +194,10 @@ if (WIN32) add_compile_flags_if_supported(-Wno-dll-attribute-on-redeclaration) endif() +if (MIPS_FPABI_FPXX) + add_compile_flags(-mfp64) +endif() + # Get feature flags. # Exceptions # Catches C++ exceptions only and tells the compiler to assume that extern C `````````` </details> https://github.com/llvm/llvm-project/pull/81085 _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
