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From: "Mark Paulus" <commpg AT yahoo DOT com>
To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Date: Thu, 20 Sep 2001 14:13:27 -0600
Reply-To: "Mark Paulus" <commpg AT yahoo DOT com>
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Subject: Re: [ANN] dllhelpers-0.2.8 available

I have a question about the examples.  In the Makefile
(for c_and_c++, and c++ at least), there is a reference in
building the objs to the variable DLL_CFLAGS.  However, 
this does not look like it ever gets set, nor does it appear to 
have a value during make execution.  

My question is, is this merely a holdover from some previous
versions that got dropped, but the comments never got
removed, or does this variable need to have a value, 
and if so, under what conditions?

Thanks.



On Wed, 19 Sep 2001 18:22:41 -0400, Charles Wilson wrote:

>I've updated the dllhelpers package at cygutils
>
>http://www.neuro.gatech.edu/users/cwilson/cygutils/V1.1/dll-stuff/
>
>The new version no longer uses the '--enable-auto-image-base' function 
>of the linker; it seems to cause problems under cygwin.  Instead, 
>DLL-builders should either
>
>   a) don't specifiy any image base -- just let the linker use its 
>default of 0x10000000.  Thus, all DLLs will have the same image base, 
>and the windows runtime linker will relocate them when an application 
>loads them.  However, they won't then conflict with the cygwin1.dll 
>(which is absolutely required).  Also, runtime relocation is relatively 
>inexpensive on windows.
>
>   b) explicitly specify an image base for every DLL you build (be 
>careful!).  -Wl,--image-base=0xXXXXXXXX.
>
>this is explained in the updated documentation within the dllhelpers 
>package.
>
>Also, I've added a "c_and_c++" example, with two DLL's -- one C-based 
>and one C++based -- which are both used by a single C++ client application.
>
>--Chuck
>
>
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