[compiler-rt] r225049 - Avoid building compiler-rt with LTO.

[David Blaikie]

Seems to be breaking my build?

[54/816] Building C object
projects/compiler-rt/lib/tsan/CMakeFiles/clang_rt.tsan-x86_64.dir/rtl/tsan_rtl_amd64.S.o
FAILED: /usr/local/google/home/blaikie/install/bin/clang  -D_DEBUG
-D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS
-D__STDC_LIMIT_MACROS -fcolor-diagnostics -fPIC -Wall -W
-Wno-unused-parameter -Wwrite-strings -Wmissing-field-initializers
-pedantic -Wno-long-long -Wcovered-switch-default -Werror
-fcolor-diagnostics -ffunction-sections -fdata-sections -Wall -Werror -g
-Iprojects/compiler-rt/lib/tsan
-I/usr/local/google/home/blaikie/dev/llvm/src/projects/compiler-rt/lib/tsan
-Iinclude -I/usr/local/google/home/blaikie/dev/llvm/src/include
-I/usr/local/google/home/blaikie/dev/llvm/src/projects/compiler-rt/lib/tsan/..
   -gsplit-dwarf  -m64 -fPIC -fno-builtin -fno-exceptions
-fomit-frame-pointer -funwind-tables -fno-stack-protector
-fvisibility=hidden -fno-function-sections -fno-lto -O3 -gline-tables-only
-Wno-gnu -Wno-variadic-macros -Wno-c99-extensions -Wno-non-virtual-dtor
-fPIE -fno-rtti -Wframe-larger-than=512 -Wglobal-constructors -MMD -MT
projects/compiler-rt/lib/tsan/CMakeFiles/clang_rt.tsan-x86_64.dir/rtl/tsan_rtl_amd64.S.o
-MF
projects/compiler-rt/lib/tsan/CMakeFiles/clang_rt.tsan-x86_64.dir/rtl/tsan_rtl_amd64.S.o.d
-o
projects/compiler-rt/lib/tsan/CMakeFiles/clang_rt.tsan-x86_64.dir/rtl/tsan_rtl_amd64.S.o
  -c
/usr/local/google/home/blaikie/dev/llvm/src/projects/compiler-rt/lib/tsan/rtl/tsan_rtl_amd64.S
clang-3.4: error: argument unused during compilation: '-fno-lto'

On Wed, Dec 31, 2014 at 10:20 AM, Rafael Espindola <
rafael.espindola at gmail.com> wrote:

> Author: rafael
> Date: Wed Dec 31 12:20:52 2014
> New Revision: 225049
>
> URL: http://llvm.org/viewvc/llvm-project?rev=225049&view=rev
> Log:
> Avoid building compiler-rt with LTO.
>
> During a LTO we still need to build a compiler_rt with regular object files
> in the .a.
>
> Modified:
>     compiler-rt/trunk/CMakeLists.txt
>     compiler-rt/trunk/cmake/config-ix.cmake
>
> Modified: compiler-rt/trunk/CMakeLists.txt
> URL:
> http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/CMakeLists.txt?rev=225049&r1=225048&r2=225049&view=diff
>
> ==============================================================================
> --- compiler-rt/trunk/CMakeLists.txt (original)
> +++ compiler-rt/trunk/CMakeLists.txt Wed Dec 31 12:20:52 2014
> @@ -231,6 +231,7 @@ append_list_if(COMPILER_RT_HAS_FUNWIND_T
>  append_list_if(COMPILER_RT_HAS_FNO_STACK_PROTECTOR_FLAG
> -fno-stack-protector SANITIZER_COMMON_CFLAGS)
>  append_list_if(COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG
> -fvisibility=hidden SANITIZER_COMMON_CFLAGS)
>  append_list_if(COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG
> -fno-function-sections SANITIZER_COMMON_CFLAGS)
> +append_list_if(COMPILER_RT_HAS_FNO_LTO_FLAG -fno-lto
> SANITIZER_COMMON_CFLAGS)
>
>  if(MSVC)
>    # Replace the /MD[d] flags with /MT.
>
> Modified: compiler-rt/trunk/cmake/config-ix.cmake
> URL:
> http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/cmake/config-ix.cmake?rev=225049&r1=225048&r2=225049&view=diff
>
> ==============================================================================
> --- compiler-rt/trunk/cmake/config-ix.cmake (original)
> +++ compiler-rt/trunk/cmake/config-ix.cmake Wed Dec 31 12:20:52 2014
> @@ -16,6 +16,7 @@ check_cxx_compiler_flag(-ffreestanding
>  check_cxx_compiler_flag("-Werror -fno-function-sections"
> COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG)
>  check_cxx_compiler_flag(-std=c++11
>  COMPILER_RT_HAS_STD_CXX11_FLAG)
>  check_cxx_compiler_flag(-ftls-model=initial-exec
> COMPILER_RT_HAS_FTLS_MODEL_INITIAL_EXEC)
> +check_cxx_compiler_flag(-fno-lto             COMPILER_RT_HAS_FNO_LTO_FLAG)
>
>  check_cxx_compiler_flag(/GR COMPILER_RT_HAS_GR_FLAG)
>  check_cxx_compiler_flag(/GS COMPILER_RT_HAS_GS_FLAG)
>
>
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