[compiler-rt] [compiler-rt] Add COMPILER_RT_GPU_THIN_LTO to build with -flto=thin (PR #226916)

[Joseph Huber via llvm-commits]

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@@ -397,7 +399,11 @@ if(COMPILER_RT_GPU_BUILD)
   append_list_if(UBSAN_COMMON_SUPPORTED_ARCH -ffreestanding SANITIZER_COMMON_CFLAGS)
   append_list_if(COMPILER_RT_HAS_NOGPULIB_FLAG -nogpulib SANITIZER_COMMON_CFLAGS)
   append_list_if(COMPILER_RT_HAS_NOSTDLIBINC_FLAG -nostdlibinc SANITIZER_COMMON_CFLAGS)
-  append_list_if(COMPILER_RT_HAS_FLTO_FLAG -flto SANITIZER_COMMON_CFLAGS)
+  if(COMPILER_RT_GPU_THIN_LTO)
+    append_list_if(COMPILER_RT_HAS_FLTO_THIN_FLAG -flto=thin SANITIZER_COMMON_CFLAGS)
+  else()
+    append_list_if(COMPILER_RT_HAS_FLTO_FLAG -flto SANITIZER_COMMON_CFLAGS)
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jhuber6 wrote:

Does this also cover the builtins? The compiler-rt build is weird.

https://github.com/llvm/llvm-project/pull/226916