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From: "Lavrentiev, Anton (NIH/NLM/NCBI) [C] via cygwin" <cygwin AT cygwin DOT com>
Reply-To: "Lavrentiev, Anton (NIH/NLM/NCBI) [C]" <lavr AT ncbi DOT nlm DOT nih DOT gov>
To: "'cygwin AT cygwin DOT com'" <cygwin AT cygwin DOT com>
Subject: Re: Question about the ldd output
Date: Mon, 8 Jul 2019 18:00:07 +0000
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Well, I don't think there's anything special that Cygwin does to load executables, because these are essentially Windows processes, so they are loaded by Windows, first and foremost.

But it gets even weirder.  Below are two _consecutive!_ runs of ldd on the very same executable.  Why the output differs so drastically (including the unknown dlls all of a sudden)?

1.
        ntdll.dll => /cygdrive/c/WINDOWS/SYSTEM32/ntdll.dll (0x7ffc339d0000)
        KERNEL32.DLL => /cygdrive/c/WINDOWS/System32/KERNEL32.DLL (0x7ffc31a00000)
        KERNELBASE.dll => /cygdrive/c/WINDOWS/System32/KERNELBASE.dll (0x7ffc30090000)
        cygbz2-1.dll => /usr/bin/cygbz2-1.dll (0x3f6a40000)
        cygcom_err-2.dll => /usr/bin/cygcom_err-2.dll (0x3ef750000)
        cyggssapi_krb5-2.dll => /usr/bin/cyggssapi_krb5-2.dll (0x3eceb0000)
        cygiconv-2.dll => /usr/bin/cygiconv-2.dll (0x3ec980000)
        cygpcre-1.dll => /usr/bin/cygpcre-1.dll (0x3eb1a0000)
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3ee3a0000)
        cygstdc++-6.dll => /usr/bin/cygstdc++-6.dll (0x3ea280000)
        cygz.dll => /cygdrive/u/2.4.0/release/Cygwin-64/bin/cygz.dll (0x3aba30000)
        cygk5crypto-3.dll => /usr/bin/cygk5crypto-3.dll (0x3ec300000)
        cygwin1.dll => /cygdrive/u/2.4.0/release/Cygwin-64/bin/cygwin1.dll (0x180040000)
        ??? => ??? (0xe80000)
        ??? => ??? (0x1440000)
        ??? => ??? (0xe80000)
        cygkrb5-3.dll => /usr/bin/cygkrb5-3.dll (0x3ec170000)
        cygkrb5support-0.dll => /usr/bin/cygkrb5support-0.dll (0x3ec150000)
        cygintl-8.dll => /usr/bin/cygintl-8.dll (0x3ec8d0000)

2.
        ntdll.dll => /cygdrive/c/WINDOWS/SYSTEM32/ntdll.dll (0x7ffc339d0000)
        KERNEL32.DLL => /cygdrive/c/WINDOWS/System32/KERNEL32.DLL (0x7ffc31a00000)
        KERNELBASE.dll => /cygdrive/c/WINDOWS/System32/KERNELBASE.dll (0x7ffc30090000)
        cygbz2-1.dll => /usr/bin/cygbz2-1.dll (0x3f6a40000)
        cygcom_err-2.dll => /usr/bin/cygcom_err-2.dll (0x3ef750000)
        cyggssapi_krb5-2.dll => /usr/bin/cyggssapi_krb5-2.dll (0x3eceb0000)
        cygiconv-2.dll => /usr/bin/cygiconv-2.dll (0x3ec980000)
        cygpcre-1.dll => /usr/bin/cygpcre-1.dll (0x3eb1a0000)
        cygwin1.dll => /cygdrive/u/2.4.0/release/Cygwin-64/bin/cygwin1.dll (0x180040000)
        cyggcc_s-seh-1.dll => /usr/bin/cyggcc_s-seh-1.dll (0x3ee3a0000)
        cygstdc++-6.dll => /usr/bin/cygstdc++-6.dll (0x3ea280000)
        cygk5crypto-3.dll => /usr/bin/cygk5crypto-3.dll (0x3ec300000)
        cygkrb5-3.dll => /usr/bin/cygkrb5-3.dll (0x3ec170000)
        cygz.dll => /cygdrive/u/2.4.0/release/Cygwin-64/bin/cygz.dll (0x3aba30000)
        cygkrb5support-0.dll => /usr/bin/cygkrb5support-0.dll (0x3ec150000)
        cygintl-8.dll => /usr/bin/cygintl-8.dll (0x3ec8d0000)
	

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