This is the mail archive of the
cygwin-developers
mailing list for the Cygwin project.
Re: [64 bit] problem using Win32 API in native Cygwin64 library
- From: VÃclav Zeman <vhaisman at gmail dot com>
- To: cygwin-developers at cygwin dot com
- Date: Wed, 3 Apr 2013 13:25:30 +0200
- Subject: Re: [64 bit] problem using Win32 API in native Cygwin64 library
- References: <CAKw7uVgA__HaEWya9o93oV0u-YaYhRmSEUBbJOMgvifk5DLZZw at mail dot gmail dot com> <20130402111942 dot GC15384 at calimero dot vinschen dot de> <20130402153705 dot GE18060 at calimero dot vinschen dot de>
On 2 April 2013 17:37, Corinna Vinschen wrote:
> On Apr 2 13:19, Corinna Vinschen wrote:
>> Hi VÃclav,
>>
>> On Apr 2 12:25, VÃclav Zeman wrote:
>> > Hi.
>> >
>> > I have tried to compile the log4cplus library on Cygwin64. Compilation
>> > goes fine but linking ends with error.
>> > [...]
>> > src/.libs/liblog4cplus_la-cygwin-win32.o: In function `VarCmp':
>> > /usr/include/w32api/oleauto.h:487: undefined reference to `VarCmp'
>> > /usr/include/w32api/oleauto.h:487:(.text+0x34f): relocation truncated
>> > to fit: R_X86_64_PC32 against undefined symbol `VarCmp'
>> > src/.libs/liblog4cplus_la-cygwin-win32.o: In function `_InterlockedAdd':
>> > /usr/include/w32api/winnt.h:1452: undefined reference to
>> > `_InterlockedExchangeAdd'
>> > [...]
>>
>> Thanks for the report. That's apparently a bug in the Cygwin w32api
>> implementation of the mingw libs. On 64 bit, a lot of simple functions
>> of the w32api, or functions used under the hood of inline functions, are
>> implemented as compiler intrinsics in the Microsoft Visual compilers.
>>
>> These compiler intrinsics don't exist in gcc, therefore they are
>> implemented as library functions in Mingw-w64. Unfortunately they are
>> implemented in libmingwex.a right now, which is not included in the
>> Cygwin w32api.
>>
>> I'm going to fix that today, so that the intrinsics will be exported
>> by libkernel32.a instead. This allows Cygwin applications to access
>> them as well.
>>
>> Stay tuned.
>
> I just uploaded a new w32api package which should fix this issue.
> The intrinsics are now provide by libkernel32.a. Please give it
> a try.
It is much better but I am still getting one failure:
src/.libs/liblog4cplus_la-cygwin-win32.o: In function `VarCmp':
/usr/include/w32api/oleauto.h:487: undefined reference to `VarCmp'
/usr/include/w32api/oleauto.h:487:(.text+0x34f): relocation truncated
to fit: R_X86_64_PC32 against undefined symbol `VarCmp'
collect2: error: ld returned 1 exit status
Makefile:1110: recipe for target `liblog4cplus.la' failed
--
VZ