[LLVMdev] Building Compiler-RT on Windows

[Daniel Dilts]

Has anyone built Compiler-RT on Windows?  I am attempting to compile it for ARM, but I get errors from CMake.  It appears to be trying to pass VC++ flags to Clang.  I am using a version of Clang built from trunk.

PS D:\llvm\arm_test\compiler-rt-build> cmake -G Ninja -DCMAKE_C_COMPILER=clang.exe -DCMAKE_CXX_COMPILER=clang++.exe -DCM
AKE_RC_COMPILER=rc.exe -DCMAKE_CXX_FLAGS="" -DCMAKE_C_FLAGS="" ..\compiler-rt
-- The C compiler identification is Clang 3.7.0
clang.exe: error: no such file or directory: '/nologo'
clang.exe: error: no such file or directory: '/showIncludes'
-- The CXX compiler identification is Clang 3.7.0
clang.exe: error: no such file or directory: '/nologo'
clang.exe: error: no such file or directory: '/showIncludes'
-- Check for working C compiler using: Ninja
-- Check for working C compiler using: Ninja -- broken
CMake Error at C:/Program Files (x86)/CMake/share/cmake-3.1/Modules/CMakeTestCCompiler.cmake:61 (message):
  The C compiler "d:/llvm/build/Release/bin/clang.exe" is not able to compile
  a simple test program.

  It fails with the following output:

   Change Dir: D:/llvm/arm_test/compiler-rt-build/CMakeFiles/CMakeTmp

  Run Build Command:"d:/llvm/ninja/ninja.exe" "cmTryCompileExec2171879632"

  [1/2] Building C object
  CMakeFiles\cmTryCompileExec2171879632.dir\testCCompiler.c.obj

  FAILED: d:\llvm\build\Release\bin\clang.exe /nologo /D_DEBUG /MDd /Zi /Ob0
  /Od /RTC1 /showIncludes
  /FoCMakeFiles\cmTryCompileExec2171879632.dir\testCCompiler.c.obj
  /FdCMakeFiles\cmTryCompileExec2171879632.dir\ -c testCCompiler.c

  clang.exe: error: no such file or directory: '/nologo'

  clang.exe: error: no such file or directory: '/D_DEBUG'

  clang.exe: error: no such file or directory: '/MDd'

  clang.exe: error: no such file or directory: '/Zi'

  clang.exe: error: no such file or directory: '/Ob0'

  clang.exe: error: no such file or directory: '/Od'

  clang.exe: error: no such file or directory: '/RTC1'

  clang.exe: error: no such file or directory: '/showIncludes'

  clang.exe: error: no such file or directory:
  '/FoCMakeFiles\cmTryCompileExec2171879632.dir\testCCompiler.c.obj'

  clang.exe: error: no such file or directory:
  '/FdCMakeFiles\cmTryCompileExec2171879632.dir\'

  ninja: build stopped: subcommand failed.

  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:12 (project)

-- Configuring incomplete, errors occurred!
See also "D:/llvm/arm_test/compiler-rt-build/CMakeFiles/CMakeOutput.log".
See also "D:/llvm/arm_test/compiler-rt-build/CMakeFiles/CMakeError.log".

[Alexey Samsonov]

It looks like your command fails early in CMake TryCompile tests. Does (your version of) CMake supports using Clang on Windows at all?

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--

Alexey Samsonov
vono...@gmail.com

[Daniel Dilts]

I am using CMake 3.1.2.

[Timur Iskhodzhanov]

[+Saleem]

[Daniel Dilts]

While looking closer at the CMake build system, it appears that you cannot use CMake to cross compile Compiler-RT on Windows.  In lib\builtins\CMakeLists.txt it has a "if (NOT WIN32)" that should make it so that it doesn't use the target specific file lists if compiling on Windows.

[Saleem Abdulrasool]

On Fri, Feb 20, 2015 at 12:54 PM, Timur Iskhodzhanov <timu...@google.com> wrote:

[+Saleem]

On Fri Feb 20 2015 at 10:31:04 PM Daniel Dilts <dilt...@gmail.com> wrote:

I am using CMake 3.1.2.

On Fri, Feb 20, 2015 at 10:00 AM, Alexey Samsonov <vono...@gmail.com> wrote:

It looks like your command fails early in CMake TryCompile tests. Does (your version of) CMake supports using Clang on Windows at all?

On Fri, Feb 20, 2015 at 7:02 AM, Daniel Dilts <dilt...@gmail.com> wrote:

Has anyone built Compiler-RT on Windows?  I am attempting to compile it for ARM, but I get errors from CMake.  It appears to be trying to pass VC++ flags to Clang.  I am using a version of Clang built from trunk.

This is unclear to me.  Are you trying to build it for Windows ARM?  Or some other ARM environment?

--

Saleem Abdulrasool
compnerd (at) compnerd (dot) org

[Daniel Dilts]

I am attempting to build for bare-metal ARM.

[Saleem Abdulrasool]

On Thu, Feb 26, 2015 at 9:39 AM, Daniel Dilts <dilt...@gmail.com> wrote:

I am attempting to build for bare-metal ARM.

I found that cross-compiling compiler-rt was best achieved by either using the Make based build, or by writing your own CMakeList.txt outside of the included build system.  Note that you will need a sys root if you are trying to build the sanitizers or the profiler.