similar to: [LLVMdev] LLVM 3.6: problems building on Windows using MSVC 2013

Hi Nico, Reid, and Anton, I missed the discussion when I implemented dllexport/dllimport for our local tree. I essentially implemented your approach#1. I was trying to avoid the various external_linkage + some_attribute approaches because it seems that external_linkage would imply the external linkage without the dllimport/dllexport semantics, and there may be existing compiler codes that rely on

Hello, while improving and extending support for dllexport/import I have noticed that the current way these are implemented is problematic and I would like some input on how to proceed. Currently dllexport/dllimport is treated as linkage type. This conflicts with inlined functions because there is no linkage for the combination of both. On first though, combining both doesn't make sense, but

The following patch changes export.h so that the dllimport/dllexport attributes work with mingw/mingw-w64 and others: - changes _declspec keyword to __declspec: the former may not be defined by some toolchains. - changes the _MSC_VER condition to universally _WIN32: MSVC, as well as GCC supports this. Attached patch: declspec.diff Regards. -- O.S. -------------- next part --------------

> > So… my question is: why?! More importantly: what do I need to do to be > > able to export/import a class such as clang::driver::Compilation? > > It looks like MSVC is trying to synthesize and export the copy assignment > operator and copy constructur. This is interesting, as I thought it wouldn't do > that if the class turns out not to be non-copyable. > >

On 23.04.2013 19:10, Gao, Yunzhong wrote: > I missed the discussion when I implemented dllexport/dllimport for our local tree. I > essentially implemented your approach#1. I was trying to avoid the various > external_linkage + some_attribute approaches because it seems that external_linkage > would imply the external linkage without the dllimport/dllexport semantics, and there > may

No, I am currently using MSVC 2013 Update 3. Why? Is there something I should (have) know(n)? Alan From: Zachary Turner [mailto:zturner at google.com] Sent: 10 March 2015 17:40 To: Alan Garny; llvmdev Subject: Re: [LLVMdev] LLVM 3.6: problems building on Windows using MSVC 2013 To be certain, are you using MSVC 2013 Update 4? On Tue, Mar 10, 2015 at 9:18 AM Alan Garny <agarny

Actually, adding a LLVM_EXPORT macro would be positive for other environments, because you can then build LLVM as a shared library with -fvisibility=hidden and use LLVM_EXPORT to only make public symbols visible. There are several advantages to this, as noted here: http://gcc.gnu.org/wiki/Visibility From: Reid Kleckner Sent: Wednesday, May 08, 2013 6:21 PM To: Peng Cheng Cc: LLVMdev at

On 01/23/17 01:01 AM, Erik de Castro Lopo wrote: > Dave Yeo wrote: > >> >GCC supports __declspec(dllexport) though it still needs a def file, >> >with no exports. Libtool doesn't currently and as flac uses libtool... > So you're happy with this patch? > > http://lists.xiph.org/pipermail/flac-dev/2017-January/006170.html > No. Lots of errors such

> I am trying to use llvm-gcc to link shared libraries on windows/mingw32. > When I try to link libraries that contain functions declared with >  __declspec(dllexport) someFunction(); > > I get the link error: > >  Cannot export _someFunction: symbol not found dllexport declspec should be put on the function definition, in this example there is nothing to export - dllexport

Hi all, I am trying to use llvm-gcc to link shared libraries on windows/mingw32. When I try to link libraries that contain functions declared with __declspec(dllexport) someFunction(); I get the link error: Cannot export _someFunction: symbol not found Removing the declspec directive solves the problem, but this is not a very feasible solution for me. Using 'regular' gcc does not

On 01/22/17 02:00 PM, Ozkan Sezer wrote: > Question: Does emx support __declspec(dllexport) so I can adjust > these changes? Because the emx build of the dll seems to have > exported_everything_ :( GCC supports __declspec(dllexport) though it still needs a def file, with no exports. Libtool doesn't currently and as flac uses libtool... Dave

Óscar Fuentes <ofv at wanadoo.es> writes: > Michael Spencer <bigcheesegs at gmail.com> writes: > > The problem is that MSVC++ requires sprinkling > > __declspec(dllexport/dllimport) all over the code, and we really don't > > want to deal with maintaining that, as most developers have little to > > no experience with Windows DLLs. > > BTW, you

On Fri, Apr 6, 2012 at 6:15 PM, Alan Garny <agarny at hellix.com> wrote: > Hi, > > From what I have seen on this mailing list and elsewhere, it would seem that > it isn’t possible to build LLVM as a shared library using Visual C++. Still, > I would imagine that quite a few people are or would be interested in it, > so… is there any plan to support this any time soon? This,

On Wed, May 8, 2013 at 8:55 PM, Morten Ofstad <morten at hue.no> wrote: > Actually, adding a LLVM_EXPORT macro would be positive for other > environments, because you can then build LLVM > as a shared library with -fvisibility=hidden and use LLVM_EXPORT to only > make public symbols visible. There are several > advantages to this, as noted here: > I agree, this would be

Owen Anderson <resistor at mac.com> writes: > On May 13, 2008, at 6:38 PM, Óscar Fuentes wrote: >> Last time I checked, building LLVM on Windows (MinGW or MSVC) did not >> produce dlls. >> >> Has this changed? >> >> I was succesful converting the libraries produced by MinGW to dlls, >> though. > > It's a little bit immaterial whether

Hi Nico, Thank you for your feedback. I'll try to answer your questions below. > What problems do you expect with another approach? I have a local > prototype that removes dllimport/export as linkage and uses function > attributes and an extension to globals. I decorate dllexported functions with > the Used attribute and it seems to work fine. This allows such functions to >

If building a static library, marking symbols as dllexport causes them to be exported from the final executable. For example, run objdump -x opus_demo.exe on a --disabled-shared build and look for the export table; there should not be one in a normal Win32 .exe file, but when linking static libopus, the exe exports all of the opus_* public functions. Use the libtool-defined DLL_EXPORT flag to

Hi, I've been doing some experimenting to get a "big" DLL version of Clang working. This involves changes to LLVM as well as Clang, and might apply to doing a "big" DLL version of LLVM too (if that makes sense), so I'm posting this to both cfe-dev and llvmdev. Basically, I want to find out if this mechanism is acceptable, or what alternative I should pursue. I have a

Óscar Fuentes <ofv at wanadoo.es> wrote: > The following message is a courtesy copy of an article > that has been posted to gmane.comp.compilers.llvm.devel as well. > > nobled <nobled at dreamwidth.org> writes: > >> The LLVM 2.7 release notes say you can use ./configure --enable-shared >> to build LLVM as a shared library (libLLVM2.7.so), and the LLVM tools

On 5/24/14, lvqcl <lvqcl.mail at gmail.com> wrote: > Ozkan Sezer <sezeroz at gmail.com> ?????(?) ? ????? ?????? Sat, 24 May 2014 > 10:16:15 +0400: > >> - changes the _MSC_VER condition to universally _WIN32: MSVC, as well >> as GCC supports this. > > MSYS/MinGW 4.8.3, 4.9.0 can't compile code from git after this patch: > > format.c:47:22: error: