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X-HELO:	EMP-EXED101.leidos.com
Subject:	Re: ldd differences
References:	<56E6DA81 DOT 3050100 AT leidos DOT com> <87lh5lufh4 DOT fsf AT Rainer DOT invalid> <56E702EC DOT 5060807 AT leidos DOT com> <87h9g8vptm DOT fsf AT Rainer DOT invalid> <56E715EE DOT 4030006 AT leidos DOT com>
To:	<cygwin AT cygwin DOT com>
From:	Roger Wells <roger DOT k DOT wells AT leidos DOT com>
Message-ID:	<56E71DF2.1060905@leidos.com>
Date:	Mon, 14 Mar 2016 16:24:18 -0400
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On 03/14/2016 03:50 PM, Roger Wells wrote:
> On 03/14/2016 03:09 PM, Achim Gratz wrote:
>> Roger Wells writes:
>>>> Try cygcheck rather than ldd.
>>>>
>>> Thanks for responding.
>>>
>>> Here's what happens:
>>>
>>> $ cygcheck ./z12.exe
>>> C:\cygwin64\home\roger\src\z12\z12.exe
>>>
>>> or
>>>
>>> $ cygcheck --verbose ./z12.exe
>>> C:\cygwin64\home\roger\src\z12\z12.exe (not x86_64 dll)
>>
>> Then it doesn't seem to be a Cygwin binary.  Is that the product of some
>> cross-compilation, perhaps?
>>
> 
> It was built with MinGW GCC 4.9.3 (32 bit)
> However, recall that the older 32 bit cygwin ldd had no problem with it.
> We have been using MinGW in a Cygwin environment for over two decades
> with out surprises.  I wonder if the fact that the executable is 32-bit
> is the culprit and the 64 bit Cygwin tools are expecting 64 bit items to
> work on?  I expect that ldd etc are attempting to do what the OS does
> when it loads the executable wrt identifying what resources (i.e. dll's)
> are required.  It shouldn't matter what tool built it and both 32 bit
> and 64 bit items are going to be around for a while and both need to be
> handled correctly.  I'll probably install 32 bit Cygwin and test the
> hypothesis.  I'll let you know.
> 
> 
> cheers,
> roger
> 
Here is what happens with cygcheck from a new 32 bit Cygwin install:

$ c:/cygwin/bin/cygcheck ./z12.exe
C:\cygwin64\home\roger\src\z12\z12.exe
  C:\WINDOWS\system32\KERNEL32.dll
    C:\WINDOWS\system32\ntdll.dll
    C:\WINDOWS\system32\KERNELBASE.dll
      C:\WINDOWS\system32\api-ms-win-eventing-provider-l1-1-0.dll
    C:\Program Files\TortoiseSVN\bin\api-ms-win-core-handle-l1-1-0.dll
    C:\WINDOWS\system32\api-ms-win-core-synch-l1-2-0.dll
    C:\WINDOWS\system32\api-ms-win-core-timezone-l1-1-0.dll
    C:\Program Files\TortoiseSVN\bin\api-ms-win-core-string-l1-1-0.dll
    C:\Program Files\TortoiseSVN\bin\api-ms-win-core-util-l1-1-0.dll
    C:\Program Files\TortoiseSVN\bin\api-ms-win-core-profile-l1-1-0.dll
    C:\WINDOWS\system32\api-ms-win-core-xstate-l2-1-0.dll
    C:\Program Files\TortoiseSVN\bin\api-ms-win-core-console-l1-1-0.dll
  C:\WINDOWS\system32\msvcrt.dll
  C:\cygwin64\home\roger\lib\libnmea0183.dll
    C:\MinGW\bin\libgcc_s_dw2-1.dll
    C:\MinGW\bin\libstdc++-6.dll
  C:\cygwin64\home\roger\lib\libsensors.dll
    C:\cygwin64\home\roger\lib\libutility.dll
      C:\WINDOWS\system32\ADVAPI32.DLL
        C:\WINDOWS\system32\SECHOST.dll
          C:\WINDOWS\system32\RPCRT4.dll
            C:\WINDOWS\system32\SspiCli.dll
              C:\WINDOWS\system32\CRYPTBASE.dll
                C:\WINDOWS\system32\bcryptPrimitives.dll
      C:\WINDOWS\system32\USER32.dll
        C:\WINDOWS\system32\GDI32.dll
      C:\WINDOWS\system32\WINMM.DLL
        C:\WINDOWS\system32\WINMMBASE.dll
      C:\WINDOWS\system32\WSOCK32.DLL
        C:\WINDOWS\system32\WS2_32.dll
  C:\cygwin64\home\roger\lib\libfilters.dll

Much more useful.

cheers again,
roger

>>
>> Regards,
>> Achim.
>>
> 
> 


-- 
Roger Wells, P.E.
leidos
221 Third St
Newport, RI 02840
401-847-4210 (voice)
401-849-1585 (fax)
roger DOT k DOT wells AT leidos DOT com

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