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To:	"cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject:	newlib 1.12.0 compiled under different cygwin versions
Date:	Tue, 14 Dec 2004 07:19:49 +1100
From:	"Craig Edwards" <craig AT haenterprises DOT com DOT au>
Organization:	H.A. Enterprises Pty Ltd
MIME-Version:	1.0
Message-ID:	<opsiyqrbs81jf2l8@edwardsc.au.ibm.com>
User-Agent:	Opera M2/7.54 (Win32, build 3865)

When mallocr.c gets compiled using the current cygwin devel base (gcc  
3.3.3), the following symbols are undefined (presumably linked in from a  
Win32 DLL):

          U __imp__LocalAlloc AT 8
          U __imp__LocalFree AT 4
          U __imp__VirtualAlloc AT 16
          U __imp__VirtualFree AT 12
          U __imp__VirtualQuery AT 12

However, in a slightly older cygwin (using gcc 3.3.1), the undefined  
symbols are:

          U _LocalAlloc AT 8
          U _LocalFree AT 4
          U _VirtualAlloc AT 16
          U _VirtualFree AT 12
          U _VirtualQuery AT 12

Now, these functions are declared in winbase.h (included indirectly by  
mallocr.c) as follows:

          #ifndef WINBASEAPI
          #ifdef __INSIDE_CYGWIN__
          #define WINBASEAPI
          #else
          #define WINBASEAPI DECLSPEC_IMPORT
          #endif

          WINBASEAPI PVOID WINAPI VirtualAlloc(PVOID,DWORD,DWORD,DWORD);
          ...

I can see that currently it thinks these functions are to be imported from  
a DLL, but why did it used to behave differently?  The reason I care is  
that my XBOX port of newlib provides its own implementation of those  
functions that get *statically* linked in to libc.a (which used to work  
just fine until I upgraded to a later version of cygwin).  Does anyone  
have any theories?

Many thanks.

--
Craig Edwards
 

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