ImageMagick 6.4.0.6-2 does not work out-of-the-box on a fresh Cygwin install: Possible package dependency issue?

[William Blunn <bill+cygwin at blunn dot org>]

ImageMagick 6.4.0.6-2 does not work out-of-the-box on a fresh Cygwin 
install.

We are missing "cyggomp-1.dll", "cygltdl-7.dll", and "cygtiff-5.dll". 
(See session log below.)

From the way that selecting one package in setup.exe sometimes seems to 
select other packages, I assumed that Cygwin had package dependency 
resolution.

But if that is the case, surely ImageMagick (or one of its dependents) 
should depend on the packages necessary to bring in the above missing DLLs.

Bill

-----8<-----
bill@bill-pc ~
$ convert
/usr/bin/convert.exe: error while loading shared libraries: ?: cannot 
open shared object file: No such file or directory

bill@bill-pc ~
$ cygcheck convert
Found: C:\cygwin\bin\convert.exe
Found: C:\cygwin\bin\convert.exe
Found: C:\Windows\system32\convert.exe
Found: C:\cygwin\bin\convert.exe
Found: C:\cygwin\bin\convert.exe
C:\cygwin\bin\convert.exe
 C:\cygwin\bin\cygwin1.dll
   C:\Windows\system32\ADVAPI32.DLL
     C:\Windows\system32\ntdll.dll
     C:\Windows\system32\KERNEL32.dll
     C:\Windows\system32\RPCRT4.dll
 C:\cygwin\bin\cyggcc_s-1.dll
 C:\cygwin\bin\cygMagickCore-1.dll
   C:\cygwin\bin\cygX11-6.dll
     C:\cygwin\bin\cygxcb-1.dll
       C:\cygwin\bin\cygXau-6.dll
       C:\cygwin\bin\cygXdmcp-6.dll
   C:\cygwin\bin\cygXext-6.dll
   C:\cygwin\bin\cygbz2-1.dll
   C:\cygwin\bin\cygfontconfig-1.dll
     C:\cygwin\bin\cygexpat-1.dll
     C:\cygwin\bin\cygfreetype-6.dll
       C:\cygwin\bin\cygz.dll
     C:\cygwin\bin\cygiconv-2.dll
   C:\Windows\system32\GDI32.dll
     C:\Windows\system32\USER32.dll
 C:\cygwin\bin\cygMagickWand-1.dll
cygcheck: track_down: could not find cyggomp-1.dll

cygcheck: track_down: could not find cygltdl-7.dll

cygcheck: track_down: could not find cygtiff-5.dll
----->8-----


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