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[sanitizer] Re-enable -fno-function-sections for powerpc64le

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Summary:
For a reason that hasn't been investigated for lack of powerpc knowledge and
hardware, -fno-function-sections is required for the Sanitizers to work
properly on powerpc64le. Without, the function-sections-are-bad test fails on
that architecture (and that architecture only).

This patch re-enables the flag in the powerpc64le cflags.

I have to admit I am not entirely sure if my way is the proper way to do this,
so if anyone has a better way, I'll be happy to oblige.

Reviewers: kcc, eugenis

Reviewed By: eugenis

Subscribers: nemanjai, mgorny, llvm-commits

Differential Revision: https://reviews.llvm.org/D29285

llvm-svn: 293558
This commit is contained in:
Kostya Kortchinsky 2017-01-30 22:31:49 +00:00
parent 6217fa44b8
commit 2282ede5a8
1 changed files with 8 additions and 0 deletions
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8
compiler-rt/CMakeLists.txt
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@ -144,6 +144,14 @@ append_list_if(COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG -fvisibility=hidden SANIT
append_list_if(COMPILER_RT_HAS_FVISIBILITY_INLINES_HIDDEN_FLAG -fvisibility-inlines-hidden SANITIZER_COMMON_CFLAGS)
append_list_if(COMPILER_RT_HAS_FNO_LTO_FLAG -fno-lto SANITIZER_COMMON_CFLAGS)
# The following is a workaround for powerpc64le. This is the only architecture
# that requires -fno-function-sections to work properly. If lacking, the ASan
# Linux test function-sections-are-bad.cc fails with the following error:
# 'undefined symbol: __sanitizer_unaligned_load32'.
if(DEFINED TARGET_powerpc64le_CFLAGS)
append_list_if(COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG -fno-function-sections TARGET_powerpc64le_CFLAGS)
endif()
if(MSVC)
# Replace the /M[DT][d] flags with /MT, and strip any definitions of _DEBUG,
# which cause definition mismatches at link time.