1From 95a5c97122b7c5bdeba61f2e890bae9a961dd4bf Mon Sep 17 00:00:00 2001
2From: Khem Raj <raj.khem@gmail.com>
3Date: Wed, 8 Dec 2021 10:01:22 -0800
4Subject: [PATCH] Disable LTO on clang/riscv
5
6With clang in OE LTO does not work as it does not seem to carry right
7target info and mixes ABIs
8
9| Hard-float 'd' ABI can't be used for a target that doesn't support the D instruction set extension (ignoring target-abi)
10| /mnt/b/yoe/master/build/tmp/work/riscv32-yoe-linux/tbb/1_2021.4.0-r0/recipe-sysroot-native/usr/bin/riscv32-yoe-linux/riscv32-yoe-linux-ld: /tmp/lto-llvm-3fb1bf.o: can't link soft-float modules with double-float modules
11| /mnt/b/yoe/master/build/tmp/work/riscv32-yoe-linux/tbb/1_2021.4.0-r0/recipe-sysroot-native/usr/bin/riscv32-yoe-linux/riscv32-yoe-linux-ld: failed to merge target specific data of file /tmp/lto-llvm-3fb1bf.o
12
13Upstream-Status: Inappropriate [ OE-Specific ]
14Signed-off-by: Khem Raj <raj.khem@gmail.com>
15---
16 cmake/compilers/Clang.cmake | 2 +-
17 1 file changed, 1 insertion(+), 1 deletion(-)
18
19--- a/cmake/compilers/Clang.cmake
20+++ b/cmake/compilers/Clang.cmake
21@@ -60,7 +60,7 @@ endif()
22
23 # Enabling LTO on Android causes the NDK bug.
24 # NDK throws the warning: "argument unused during compilation: '-Wa,--noexecstack'"
25-if (NOT ANDROID_PLATFORM AND BUILD_SHARED_LIBS)
26+if (NOT ANDROID_PLATFORM AND BUILD_SHARED_LIBS AND NOT CMAKE_SYSTEM_PROCESSOR MATCHES "(riscv32|riscv64|arm)")
27     set(TBB_IPO_COMPILE_FLAGS $<$<NOT:$<CONFIG:Debug>>:-flto>)
28     set(TBB_IPO_LINK_FLAGS $<$<NOT:$<CONFIG:Debug>>:-flto>)
29 endif()
30