On Wed, 31 Oct 2018 at 16:32, Peter Dimov via Boost wrote:

This shouldn't be necessary with -fuse-ld=lld... but you need to give the option in the actual command rather than as a compile flag:

using clang-win : : "C:\\Program Files\\LLVM\\bin\\clang-cl.exe" "-fuse-ld=lld" : ... ;

It should then autodetect the above "lld-link.exe /lib" as the archiver.

Or, you could set <archiver> manually:

using clang-win : : : <archiver>"\"C:\\Program Files\\LLVM\\bin\\lld-link.exe\" /lib" ... ;

Thank you, I am going to try [all of] that. That bjam-syntax is pretty mind-boggling. It sounds like the whole thing is already cracked [which is great!]. Thanks, Peter, thanks again! degski -- *“If something cannot go on forever, it will stop" - Herbert Stein*

On Thu, 1 Nov 2018 at 12:27, degski wrote:

On Wed, 31 Oct 2018 at 16:32, Peter Dimov via Boost wrote:

...

using clang-win : : "C:\\Program Files\\LLVM\\bin\\clang-cl.exe" "-fuse-ld=lld" : ... ;

I have:

import option ; using clang-win : : "C:\\Program Files\\LLVM\\bin\\clang-cl.exe" "-fuse-ld=lld" : ... ;

output:

C:/boost/tools/build/src/tools\clang-win.jam:74: in clang-win.init *** argument error * rule path.native ( path ) * called with: ( C:\Program Files\LLVM\bin\clang-cl.exe -fuse-ld=lld ) * extra argument -fuse-ld=lld

So, this syntax does not seem to be accepted by b2.

As it is, for me, easier to write some C++-code than to try and figure out bjam-code, I wrote a wrapper https://github.com/degski/clang-cl around clang-cl.exe [yes, it's not pretty, but on the other hand, gives me full control, I can parse the arguments and decide whatever] to solve the above problem. For now I can see 1 regression, I'm going to look into that. degski -- *“If something cannot go on forever, it will stop" - Herbert Stein*

On Mon, 5 Nov 2018 at 18:46, Peter Dimov via Boost wrote:

I was going to look into this but got sidetracked, sorry.

No worries. Try the current develop.

I did, and I've use this project-config: import option ; using clang-win : : "C:\\Program Files\\LLVM\\bin\\clang-cl.exe" -fuse-ld=lld : <compatibility>vc14 <compileflags>-fmsc-version=1915 <compileflags>-fms-compatibility <compileflags>-fno-delayed-template-parsing <compileflags>-flto=thin <cxxflags>"/std:c++17" <cxxflags>"/Zc:forScope" <cxxflags>"/arch:AVX2" <cxxflags>"/Zc:wchar_t" <cxxflags>"/EHsc" <cxxflags>"/Zc:inline" <cxxflags>"/Gd" <cxxflags>"/diagnostics:classic" <cxxflags>-Wno-unknown-argument <cxxflags>-Wno-unknown-pragmas <cxxflags>-Wno-macro-redefined <cxxflags>-Wno-unused-variable <cxxflags>-Wno-mismatched-tags <cxxflags>-Wno-deprecated-declarations <cxxflags>-D_UNICODE <cxxflags>-DUNICODE <cxxflags>-DBOOST_USE_WINDOWS_H <cxxflags>-DBOOST_NO_ANSI_APIS <cxxflags>-DBOOST_USE_WINAPI_VERSION=0x1000 <cxxflags>-DBOOST_USE_WINDOWS_H=1 <cxxflags>-DNOMINMAX <cxxflags>-DWIN32_LEAN_AND_MEAN <cxxflags>-D_CRT_SECURE_NO_WARNINGS ; Note that -fuse-ld=lld in the above is not quoted, but it comes out like [as an example]: "C:\Program Files\LLVM\bin\clang-cl.exe" "-fuse-ld=lld" -m64 @"c:\boost-build\boost\bin.v2\libs\log\config\atomic-int32\clng-win-8.0.0\dbg\adrs-mdl-64\pch-off\atomic_int32.obj.rsp" So, -fuse-ld=lld is quoted in the command. It appears [looks like] clang-cl.exe gobbles the quotes, though, i.e. it seems to work. There are some options that are passed, that are linux, like template_depth, which is set to 255 [while the default is 1024]. These are ignored, and in the case of template_depth, that seems better. Then I notice this: clang-win.link c:\boost-build\boost\bin.v2\libs\stacktrace\build\clng-win-8.0.0\dbg\adrs-mdl-64\WinDbg_exe.exe "C:\Program Files\LLVM\bin\clang-cl.exe" "-fuse-ld=lld" -m64 /link /incremental:no /DEBUG /subsystem:console /out:"c:\boost-build\boost\bin.v2\libs\stacktrace\build\clng-win-8.0.0\dbg\adrs-mdl-64\WinDbg_exe.exe" @"c:\boost-build\boost\bin.v2\libs\stacktrace\build\clng-win-8.0.0\dbg\adrs-mdl-64\WinDbg_exe.exe.rsp" if %ERRORLEVEL% NEQ 0 EXIT %ERRORLEVEL% lld-link: error: undefined symbol: __imp_CoInitializeEx So it looks like ole32.lib is not linked in, or that lld-link cannot link it [for whatever reason]. There's probably more small stuff, but in general, it looks pretty good. I also tried to link to one of the thus compiled static libs (boost_random), that works. It would be cool and helpful if the output [of the build-process] be reduced. I'm on an SSD, my guess is that the bottle-neck in the build process is the console output [most of the time]. I'm also looking at an 100'000 line log file, mostly "copy x to y" or "mklink x", it's hard to spot problems. Thanks, Peter, we're getting oh so close. degski -- *“If something cannot go on forever, it will stop" - Herbert Stein*

On 11/6/2018 6:29 AM, degski via Boost wrote:

On Tue, 6 Nov 2018 at 14:17, degski wrote:

...

I did, and I've use this project-config:

import option ; using clang-win : : "C:\\Program Files\\LLVM\\bin\\clang-cl.exe" -fuse-ld=lld : <compatibility>vc14 <compileflags>-fmsc-version=1915 <compileflags>-fms-compatibility <compileflags>-fno-delayed-template-parsing <compileflags>-flto=thin <cxxflags>"/std:c++17"

Somebody asked about this, I believe Robert, so yes, compiles fine, even with C++17 [serialization and wserialization].

I do not recall if I ask. However, I have to escape the colon character with a backslash. I discover that by accident a few builds ago with b2, building all Boost with the cl.exe, approximately Visual Studio 15.6.4. Have you observed any messages stating how an unknown option is ignored? I purposely redirect all b2 output to a text file with the redirect operator. The tail end of the b2 invocation is similar to:

buildVSx64Fri5_6.log 2>&1

I highly recommend using the "2>&1". All error and normal messages will be in the one text file. Reviewing the file should isolate results faster. --Robert

<cxxflags>"/Zc:forScope"

...

<cxxflags>"/arch:AVX2" <cxxflags>"/Zc:wchar_t" <cxxflags>"/EHsc"

By default, /EHs is used and passed in it seems [so the above duplicates this option, differently]. /EHs is not the default [/EHsc is] and in the IDE, it [/EHs] is marked "Yes with Extern C functions". I don't know what exactly this entails, but "Yes with Extern C functions" does not exactly strike me as the thing I want [but who knows, maybe I do].

<cxxflags>"/Zc:inline"

...

<cxxflags>"/Gd" <cxxflags>"/diagnostics:classic" <cxxflags>-Wno-unknown-argument <cxxflags>-Wno-unknown-pragmas <cxxflags>-Wno-macro-redefined <cxxflags>-Wno-unused-variable <cxxflags>-Wno-mismatched-tags <cxxflags>-Wno-deprecated-declarations <cxxflags>-D_UNICODE <cxxflags>-DUNICODE <cxxflags>-DBOOST_USE_WINDOWS_H <cxxflags>-DBOOST_NO_ANSI_APIS <cxxflags>-DBOOST_USE_WINAPI_VERSION=0x1000 <cxxflags>-DBOOST_USE_WINDOWS_H=1 <cxxflags>-DNOMINMAX <cxxflags>-DWIN32_LEAN_AND_MEAN <cxxflags>-D_CRT_SECURE_NO_WARNINGS ;

degski

On Tue, 6 Nov 2018 at 14:17, degski wrote:

So, -fuse-ld=lld is quoted in the command. It appears [looks like] clang-cl.exe gobbles the quotes, though, i.e. it seems to work.

A simple test [slow brain I guess, alzheimers' kicking in] confirms the above: Y:\>clang-cl --version clang version 8.0.0 (trunk) Target: x86_64-pc-windows-msvc Thread model: posix InstalledDir: C:\Program Files\LLVM\bin Y:\>clang-cl "--version" clang version 8.0.0 (trunk) Target: x86_64-pc-windows-msvc Thread model: posix InstalledDir: C:\Program Files\LLVM\bin Y:\>clang-cl "--versio" clang-cl: warning: unknown argument ignored in clang-cl '--versio' (did you mean '--version'?) [-Wunknown-argument] clang-cl: error: no input files Y:\> degski -- *“If something cannot go on forever, it will stop" - Herbert Stein*

On Wed, 7 Nov 2018 at 16:01, Peter Dimov via Boost wrote:

The first level of quoting is b2 quoting:

using clang-win : : "C:\\Program Files\\LLVM\\clang-cl.exe" ;

Here the quotes and the backslashes are b2 quoting; the value itself ends up 'C:\Program Files\LLVM\clang-cl.exe' (without the single quotes of course.)

If you don't quote, as in

using clang-win : : C:/Program Files/LLVM/clang-cl.exe ;

b2 will split this on the space character and the value will be a list of `C:/Program` and `Files/LLVM/clang-cl.exe`.

With

using clang-win : : "C:\\Program Files\\LLVM\\clang-cl.exe" -fuse-ld=lld ;

the result is a list of `C:\Program Files\LLVM\clang-cl.exe` and `-fuse-ld=lld`.

The second level of quoting, which clang-win.jam applies to the above list manually with

compiler = "\"$(compiler)\"" ;

is for the Windows command line. The result is a command line of the form

"C:\Program Files\LLVM\clang-cl.exe" "-fuse-ld=lld" <args>

It's not clang-cl.exe that strips the quotes here, it's cmd.exe. Without the quotes, it will give an error that `C:\Program` isn't found.

The quotes around `-fuse-ld=lld` are unnecessary in this case, as this argument has no spaces, but they don't hurt. They would be needed for something like (hypothetically) "-fsome-path=C:\Program Files\somepath".

Thanks for the clarification. degski -- *“If something cannot go on forever, it will stop" - Herbert Stein*