[libxml-devel] Release and Windows Gem

[Charlie Savage]

> So this works for you to compile on Windows? I guess I'm a confused
> b/c you are using Config::CONFIG here. Isn't that what extconf.rb
> uses? But you said that's was why extconf.rb didn't work.

Sorry, that might have been a bit confusing.  I only pick out a few 
parts from it:

  ["archdir", "/lib/ruby/1.8/i386-mswin32"],
  ["bindir", "/bin"],
  ["libdir", "/lib"],
  ["LIBRUBY_SO", "msvcrt-ruby18.dll"],

But look at the rest, which are taken from my 1.8.4 version of Ruby 
installed with the one-click installer.  The values are for building 
with VC++.  Notice that for gcc:

* The compiler (CPP) is wrong
* The CFLAGS are wrong
* The linker command is wrong
* The linker flags (DLDFLAGS)

Thus you can't use extconf.rb. And this is the big downfall of 
extconf.rb - it assumes that you use the same compiler to build 
extensions as you use to build Ruby itself.  On Windows at least that is 
not necessarily so...

Charlie

  ["CC", "cl -nologo"]
  ["CFLAGS", "-MD -Zi -O2b2xg- -G6"],
  ["COMMON_HEADERS", "windows.h winsock.h"],
  ["COMMON_LIBS", "m"],
  ["COMPILE_C", "cl -nologo -MD -Zi -O2b2xg- -G6  -c -Tc$(<:\\=/)"],
  ["COMPILE_CXX", "$(CXX)   -c -Tp$(<:\\=/)"],
  ["CPP", "cl"],
  ["CPPFLAGS", ""],
  ["CPPOUTFILE", "-P"],
  ["DLDFLAGS",
   "-link -incremental:no -debug -opt:ref -opt:icf -dll $(LIBPATH) 
-def:$(DEFFILE) -implib:$(*F:.so=)-i386-mswin32.lib 
-pdb:$(*F:.so=)-i386-mswin32.pdb"],
  ["LDSHARED", "cl -nologo -LD"],
  ["LIBOBJS", " acosh.obj crypt.obj erf.obj win32.obj"],
  ["LIBPATHFLAG", " -libpath:\"%s\""],
  ["LINK_SO",
   "cl -nologo -LD -Fe$(@) $(OBJS) oldnames.lib user32.lib advapi32.lib 
wsock32.lib  $(LOCAL_LIBS) -link -incremental:no -debug -opt:ref 
-opt:icf -dll $(LIBPATH) -def:$(DEFFILE) 
-implib:$(*F:.so=)-i386-mswin32.lib -pdb:$(*F:.so=)-i386-mswin32.pdb"],
  ["TRY_LINK",
   "cl -nologo -Feconftest $(INCFLAGS) -I$(hdrdir)  -MD -Zi -O2b2xg- -G6 
$(src) $(LOCAL_LIBS) oldnames.lib user32.lib advapi32.lib wsock32.lib 
-link  $(LIBPATH) -stack:0x2000000"],
  ["XCFLAGS",
   "-DRUBY_EXPORT -I. -IC:/develop/win/ruby/stable 
-IC:/develop/win/ruby/stable/missing"],
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