[cfe-dev] LLVM build, CMAKE Message, 3.8.0

[NAKAMURA Takumi via cfe-dev]

I can reproduce it with clang and compiler-rt with cmake-3.3.1.
To appease, we may just add CMP0051 in compiler-rt/CMakeLists.txt.

Zachary, is there any user of "CMP0051 OLD"?
I think it may be NEW.

p.s. It might be redundant to apply llvm_update_compile_flag() to link-only
target. Investigating.


On Mon, Sep 7, 2015 at 9:42 PM Keith Smith via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> I just got the latest sources from
> http://llvm.org/svn/llvm-project/xxxx/trunk
>
> [Shell script below]
>
> I then built LLVM using CMAKE and without OCAML.
>
> My version of cmake is 3.3.1. I did built it myself.
>
> I get the following. Thought the list should know.
>
> Keith smith
>
>  ./clangcmake.sh
> -- Target triple: x86_64-unknown-linux-gnu
> -- Native target architecture is X86
> -- Threads enabled.
> -- Doxygen disabled.
> -- Sphinx disabled.
> -- Go bindings disabled.
> -- OCaml bindings disabled, need ctypes >=0.4.
> -- Building with -fPIC
> -- Constructing LLVMBuild project information
> -- Targeting X86
> -- Compiler-RT supported architectures: x86_64
> -- Clang version: 3.8.0
> CMake Warning (dev) at cmake/modules/AddLLVM.cmake:5 (get_property):
>   Policy CMP0051 is not set: List TARGET_OBJECTS in SOURCES target
> property.
>   Run "cmake --help-policy CMP0051" for policy details.  Use the
> cmake_policy
>   command to set the policy and suppress this warning.
>
>   Target "clang-tblgen" contains $<TARGET_OBJECTS> generator expression in
>   its sources list.  This content was not previously part of the SOURCES
>   property when that property was read at configure time.  Code reading
> that
>   property needs to be adapted to ignore the generator expression using the
>   string(GENEX_STRIP) command.
> Call Stack (most recent call first):
>   cmake/modules/AddLLVM.cmake:600 (llvm_update_compile_flags)
>   cmake/modules/AddLLVM.cmake:680 (add_llvm_executable)
>   cmake/modules/TableGen.cmake:82 (add_llvm_utility)
>   tools/clang/utils/TableGen/CMakeLists.txt:3 (add_tablegen)
> This warning is for project developers.  Use -Wno-dev to suppress it.
>
> -- Configuring done
> -- Generating done
>
>
> ================================
> Shell script to get LLVM source
>
>
> #!/bin/sh
> # Shell script to get llvm and clang source
> #
> # See
> http://llvm.org/docs/GettingStarted.html#getting-started-quickly-a-summary
> #
> # This script is run from the parent directory where
> #   you want the 'llvm' tree to start.
>
> # Checkout LLVM
> # Change directory to where you want the llvm directory placed.
> svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm
>
> # Checkout Clang:
> cd llvm/tools
> svn co http://llvm.org/svn/llvm-project/cfe/trunk clang
> cd ../..
>
> # Checkout Compiler-RT:
> cd llvm/projects
> svn co http://llvm.org/svn/llvm-project/compiler-rt/trunk compiler-rt
> cd ../..
>
> # Checkout libcxx and libcxxabi [Optional]:
> cd llvm/projects
> svn co http://llvm.org/svn/llvm-project/libcxx/trunk libcxx
> svn co http://llvm.org/svn/llvm-project/libcxxabi/trunk libcxxabi
> cd ../..
>
> # Checkout extra Clang Tools [Optional]:
> #   This gets the source for scan-view and scan-build
> cd llvm/tools/clang/tools
> svn co http://llvm.org/svn/llvm-project/clang-tools-extra/trunk extra
> cd ../../../..
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