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From:	Peter Klotz <Peter DOT Klotz AT ith-icoserve DOT com>
To:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Date:	Fri, 26 Jul 2013 11:56:06 +0200
Subject:	Problem with ldd in cygwin 1.7.22
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The output of ldd (32Bit) in cygwin 1.7.22 is not as expected if a single dependency cannot be found.

Correct output (all dependencies present):

$ ldd Qt5Core.dll
        ntdll.dll => /cygdrive/c/Windows/SysWOW64/ntdll.dll (0x778b0000)
        kernel32.dll => /cygdrive/c/Windows/syswow64/kernel32.dll (0x76eb0000)
        KERNELBASE.dll => /cygdrive/c/Windows/syswow64/KERNELBASE.dll (0x76be0000)
        USER32.dll => /cygdrive/c/Windows/syswow64/USER32.dll (0x75110000)
        GDI32.dll => /cygdrive/c/Windows/syswow64/GDI32.dll (0x75330000)
        LPK.dll => /cygdrive/c/Windows/syswow64/LPK.dll (0x75100000)
        USP10.dll => /cygdrive/c/Windows/syswow64/USP10.dll (0x753c0000)
        msvcrt.dll => /cygdrive/c/Windows/syswow64/msvcrt.dll (0x76ca0000)
        ADVAPI32.dll => /cygdrive/c/Windows/syswow64/ADVAPI32.dll (0x76900000)
        sechost.dll => /cygdrive/c/Windows/SysWOW64/sechost.dll (0x75490000)
        RPCRT4.dll => /cygdrive/c/Windows/syswow64/RPCRT4.dll (0x76520000)
        SspiCli.dll => /cygdrive/c/Windows/syswow64/SspiCli.dll (0x74f90000)
        CRYPTBASE.dll => /cygdrive/c/Windows/syswow64/CRYPTBASE.dll (0x74f80000)
        ole32.dll => /cygdrive/c/Windows/syswow64/ole32.dll (0x76d50000)
        WS2_32.dll => /cygdrive/c/Windows/syswow64/WS2_32.dll (0x76100000)
        NSI.dll => /cygdrive/c/Windows/syswow64/NSI.dll (0x76c90000)
        icuin51.dll => /home/user/Qt-5.1.0/x86/icuin51.dll (0x49e80000)
        icuuc51.dll => /home/user/Qt-5.1.0/x86/icuuc51.dll (0x4a0f0000)
        icudt51.dll => /home/user/Qt-5.1.0/x86/icudt51.dll (0x7b0000)
        MSVCR100.dll => /cygdrive/c/Windows/system32/MSVCR100.dll (0x74200000)
        MSVCP100.dll => /cygdrive/c/Windows/system32/MSVCP100.dll (0x742c0000)
        IMM32.DLL => /cygdrive/c/Windows/system32/IMM32.DLL (0x750a0000)
        MSCTF.dll => /cygdrive/c/Windows/syswow64/MSCTF.dll (0x76830000)

Questionable output (a single dependency, icuin51.dll, is missing):

$ ldd Qt5Core.dll
        ntdll.dll => /cygdrive/c/Windows/SysWOW64/ntdll.dll (0x778b0000)
        kernel32.dll => /cygdrive/c/Windows/syswow64/kernel32.dll (0x76eb0000)
        KERNELBASE.dll => /cygdrive/c/Windows/syswow64/KERNELBASE.dll (0x76be0000)
        ??? => ??? (0x66d10000)
        ??? => ??? (0x75110000)
        ??? => ??? (0x75330000)
        ??? => ??? (0x75100000)
        ??? => ??? (0x753c0000)
        ??? => ??? (0x76ca0000)
        ??? => ??? (0x76900000)
        ??? => ??? (0x75490000)
        ??? => ??? (0x76520000)
        ??? => ??? (0x74f90000)
        ??? => ??? (0x74f80000)
        ??? => ??? (0x76d50000)
        ??? => ??? (0x76100000)
        ??? => ??? (0x76c90000)

My intention was to find out the dependencies of Qt5Core.dll in order to satisfy them. This seems not possible in Windows.

The Linux version of ldd in this case prints a line like the following:

icuin51.so => not found

It would be great if the Windows version of ldd could behave the same (or at least similar).

Regards, Peter.
        

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