Hi,

Trying to build a 64-bit dynamic libxml2-2.7.7 and, during the make stage, I 
keep getting hammered by:

############################################
*** Warning: linker path does not have real file for library -lz.
*** I have the capability to make that library automatically link in when
*** you link to this library.  But I can only do this if you have a
*** shared version of the library, which you do not appear to have
*** because I did check the linker path looking for a file starting
*** with libz and none of the candidates passed a file format test
*** using a file magic. Last file checked: /usr/local_dyn/lib/libz.dll.a

*** Warning: linker path does not have real file for library -lws2_32.
*** I have the capability to make that library automatically link in when
*** you link to this library.  But I can only do this if you have a
*** shared version of the library, which you do not appear to have
*** because I did check the linker path looking for a file starting
*** with libws2_32 and none of the candidates passed a file format test
*** using a file magic. Last file checked: /c/Windows/system32/libws2_32.dll
*** The inter-library dependencies that have been dropped here will be
*** automatically added whenever a program is linked with this library
*** or is declared to -dlopen it.

*** Since this library must not contain undefined symbols,
*** because either the platform does not support them or
*** it was explicitly requested with -no-undefined,
*** libtool will only create a static version of it.
libtool: link: ar cru ...........
############################################

I can build a 32-bit dynamic libxml2-2.7.7 library - same source, same 
shell, just different compiler.
As the 32-bit build needs to find a 32-bit libz, and the 64-bit build needs 
to find a 64-bit libz, the configure args (namely LDFLAGS and CPPFLAGS) are 
a little different, and if I use the cross-compiler then I have to provide 
args for CC etc.

/usr/local_dyn/lib/libz.dll.a (referred to in the above excerpt from the 
'make' process) is, of course, the 64-bit import lib for the 64-bit zlib 
dll.

As regards the system library (ws2_32) I'm sure that I once got around a 
similar problem with gdi32.dll by creating a copy of it called libgdi32.dll 
.... but I can't get the same "fix" to work re ws2_32.dll.

Just to re-iterate - if the compiler is 32-bit (be it from mingw.org or from 
the mingw64 team) there's no problem, but if the compiler is 64-bit (be it 
one of sezero's builds or the cross-compiler) then there's seemingly no way 
I can build a dynamic libxml2 library in the msys shell.

Does anyone here have a clear understanding of what this arcane procedure is 
doing, and of how to get it to realize that the dynamic libs are all there ?

I did look at instead using the win32/Makefile.mingw that ships with the 
libxml2 sources, but it contains (in part):

####################################
# There should never be a need to modify anything below this line.
# ----------------------------------------------------------------

AUTOCONF = .\config.mingw
include $(AUTOCONF)
####################################

and, of course, config.mingw doesn't even exist afaict. (Maybe I should 
explore this avenue further instead of trying to get configure to do the job 
properly.)

Cheers,
Rob 


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