new runtime pseudo-reloc in cygwin 1.3.18

[Charles Wilson]

Alexander Gottwald wrote:
> Alan Hourihane wrote:
> 
> 
>>I'm about to commit a patch to the XFree86 CVS that uses the new relocation
>>code in cygwin 1.3.18. This allows us to create the last few libraries
>>as shared code.
> 
> 
> How will this affect people with cygwin <1.3.18?

It won't affect them (adversely).  All that matters is that the 
developer's system has cygwin >= 1.3.18 (and "developer" also means 
anyone who is attempting to *compile* an X-based program, not just those 
who are compiling XFree86 itself).

E.g. pure "users" who don't compile anything, will be fine.  They can 
run the new binaries.

--enable-pseudo-reloc tells the linker "don't worry about multi-word 
data imports; the runtime will fix them up".  And, the "runtime" is 
actually a snippet of *static* code that gets linked into the dll/exe -- 
this static code is included in libcygwin1.a.  Since it's static (e.g. 
not in cygwin1.dll), every compiled program/dll that needs it will have 
its very own copy; it doesn't matter if the user has an old version of 
cygwin1.dll.

--Chuck