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cmake: Check whether SME functions can be compiled

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This fixes builds with top-of-tree Clang for Windows; SME functions
require backing up/restoring things that Clang can't express in
Windows unwind information - see
https://github.com/llvm/llvm-project/issues/80009 for more
context (primarily about SVE).

Similar checks would also be needed for SVE and dotprod functions,
if building with older toolchains.

Change-Id: Iab3eeb0a125c3fac9814648288261a056bffc900
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/5729969
Reviewed-by: Justin Green <greenjustin@google.com>
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
This commit is contained in:
Martin Storsjö 2024-07-23 15:52:22 +03:00 committed by Frank Barchard
parent 8f039f639c
commit 36abe81e92
1 changed files with 24 additions and 5 deletions
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29
CMakeLists.txt
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@ -2,6 +2,8 @@
# Originally created for "roxlu build system" to compile libyuv on windows
# Run with -DTEST=ON to build unit tests
include(CheckCSourceCompiles)
PROJECT ( YUV C CXX ) # "C" is required even for C++ projects
CMAKE_MINIMUM_REQUIRED( VERSION 2.8.12 )
OPTION( UNIT_TEST "Built unit tests" OFF )
@ -111,11 +113,28 @@ if(NOT MSVC)
TARGET_COMPILE_OPTIONS(${ly_lib_name}_sve PRIVATE -march=armv9-a+sve2)
LIST(APPEND ly_lib_parts $<TARGET_OBJECTS:${ly_lib_name}_sve>)
# Enable AArch64 SME kernels.
ADD_LIBRARY(${ly_lib_name}_sme OBJECT
${ly_src_dir}/rotate_sme.cc)
TARGET_COMPILE_OPTIONS(${ly_lib_name}_sme PRIVATE -march=armv9-a+sme)
LIST(APPEND ly_lib_parts $<TARGET_OBJECTS:${ly_lib_name}_sme>)
set(OLD_CMAKE_REQURED_FLAGS ${CMAKE_REQUIRED_FLAGS})
set(OLD_CMAKE_TRY_COMPILE_TARGET_TYPE ${CMAKE_TRY_COMPILE_TARGET_TYPE})
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -march=armv9-a+sme")
set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
# Check whether the compiler can compile SME functions; this fails
# with Clang for Windows.
check_c_source_compiles("
__arm_locally_streaming void func(void) { }
int main(void) { return 0; }
" CAN_COMPILE_SME)
set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQURED_FLAGS})
set(CMAKE_TRY_COMPILE_TARGET_TYPE ${OLD_CMAKE_TRY_COMPILE_TARGET_TYPE})
if (CAN_COMPILE_SME)
# Enable AArch64 SME kernels.
ADD_LIBRARY(${ly_lib_name}_sme OBJECT
${ly_src_dir}/rotate_sme.cc)
TARGET_COMPILE_OPTIONS(${ly_lib_name}_sme PRIVATE -march=armv9-a+sme)
LIST(APPEND ly_lib_parts $<TARGET_OBJECTS:${ly_lib_name}_sme>)
else()
ADD_DEFINITIONS(-DLIBYUV_DISABLE_SME)
endif()
endif()
endif()