Re: [llvm-dev] 3 stage ninja bootstrap on darwin?

Hi all
I just ran into the same issue Jack described below.
I did a 2-stage build of LLVM/Clang/Compiler-rt on the current
      release_50 branch.
Versions:
OSX 10.12.6, Xcode 8.0, CMake 1.8.2, Ninja 1.7.2, Ccache 3.3.4
Log:
$ cmake -G Ninja -DCMAKE_CXX_COMPILER_LAUNCHER=ccache
 -DCMAKE_BUILD_TYPE=Release 

      -DLLVM_ENABLE_LTO=ON 
 -DLLVM_TARGETS_TO_BUILD=host 

      -DLLVM_CREATE_XCODE_TOOLCHAIN=ON 
 -DLLVM_INCLUDE_TESTS=ON 

      -DLLVM_INCLUDE_EXAMPLES=OFF 

      -DLLVM_INCLUDE_DOCS=OFF 

      -DLLVM_ENABLE_PROJECTS="clang;compiler-rt;lldb" 
 -DCLANG_ENABLE_BOOTSTRAP=ON ../llvm
-- The C compiler identification is AppleClang 8.0.0.8000038
-- The CXX compiler identification is AppleClang 8.0.0.8000038
...
-- Build files have been written to:
      /media/Dev/llvm50/build-ninja-clang-release
$ ninja stage2
...
-- Performing Test LLVM_NO_OLD_LIBSTDCXX
-- Performing Test LLVM_NO_OLD_LIBSTDCXX - Failed
CMake Error at cmake/modules/CheckCompilerVersion.cmake:38
      (message):
 Host Clang must be able to find libstdc++4.8 or newer!
Call Stack (most recent call first):
 cmake/config-ix.cmake:14 (include)
 CMakeLists.txt:584 (include)
Hack to force LLVM_ENABLE_LIBCXX=ON:

diff --git a/cmake/modules/CheckCompilerVersion.cmake
      b/cmake/modules/CheckCompilerVersion.cmake
index 2e8f5445781..38ec06c7631 100644
--- a/cmake/modules/CheckCompilerVersion.cmake
+++ b/cmake/modules/CheckCompilerVersion.cmake
@@ -1,6 +1,7 @@
 # Check if the host compiler is new enough. LLVM requires at
      least GCC 4.8,
 # MSVC 2015 (Update 3), or Clang 3.1.
 
+set(LLVM_ENABLE_LIBCXX ON)
 include(CheckCXXSourceCompiles)
 
 if(NOT DEFINED LLVM_COMPILER_CHECKED)


      Maybe it just got messed up. However, I never explicitly pass 

      -DLLVM_ENABLE_LIBCXX=ON and it never caused problems in
      single-stage builds, 

      as on OSX the setting defaults to ON. Shouldn't that be the same
      for 2-stage 

      out of the box? Maybe stage 1 passes an invalid setting to the 
stage
        2

      
configuration that overrides the otherwise correct
      default?


    


    
Cheers


    
Stefan

      

    
  Is anyone using the 3 stage bootstrap
        described under 3-Stage


      
Non-Determinism at 
http://llvm.org/docs/AdvancedBuilds.html
?
        I am


      
trying to build against the MacPorts current python2.7,
        ninja and make


      
releases, a build of current trunk for llvm, compiler-rt,
        cfe and


      
clang-tools-extra using...
% cmake -DLLVM_LINK_LLVM_DYLIB:BOOL=ON


      
-DCOMPILER_RT_ENABLE_IOS:BOOL=
OFF
        -DLLVM_LIT_ARGS:STRING=-v


      
-DPYTHON_EXECUTABLE:FILEPATH=/
opt/local/bin/python2.7


      
-DLLVM_ENABLE_ASSERTIONS:BOOL=
OFF
        -DCMAKE_OSX_SYSROOT:STRING=/


      
-DCMAKE_OSX_DEPLOYMENT_TARGET:
STRING=


      
-DLLVM_TARGETS_TO_BUILD="X86;
PowerPC;ARM"


      
-DCMAKE_INSTALL_PREFIX:PATH=/
Users/howarth/dist


      
-DCMAKE_BUILD_TYPE:STRING=
Release
        -DLLVM_ENABLE_LIBCXX:BOOL=ON -G


      
Ninja -C /Users/howarth/3stage/cfe-5.0.
0.src/cmake/caches/3-stage.
cmake


      
../llvm-5.0.0.src


      
% ninja stage3
on x86_64-apple-darwin16 using the Xcode 8.3 Beta 5 devtools
        as the


      
system compiler. The build is tripping up on the error...
-- Performing Test LLVM_NO_OLD_LIBSTDCXX


      
-- Performing Test LLVM_NO_OLD_LIBSTDCXX - Failed


      
CMake Error at cmake/modules/
CheckCompilerVersion.cmake:38
        (message):


      
  Host Clang must be able to find libstdc++4.8 or newer!


      
Call Stack (most recent call first):


      
  cmake/config-ix.cmake:14 (include)


      
  CMakeLists.txt:559 (include)
where is seems that -DLLVM_ENABLE_LIBCXX:BOOL=ON isn't getting
        passed


      
down to from stage1 to the stage2 configuration step. Any
        ideas on how


      
to work around this for a build against the system
        livc+++ under


      
Sierra?


      
         Jack
-- 
https://weliveindetail.github.io/blog/
https://cryptup.org/pub/stefan....@gmail.com

Re: [llvm-dev] 3 stage ninja bootstrap on darwin?

Stefan Gränitz via llvm-dev

Chris Bieneman via llvm-dev

Csaba Raduly via llvm-dev

Don Hinton via llvm-dev