[Gtk2hs-commit] Improve the new GObject reference-count update.

[Axel S. <A....@ke...>]

Wed May  3 11:41:01 PDT 2006  Axel Simon <A....@ke...>
  * Improve the new GObject reference-count update.
  
  I've added new macros to test for the appropriate GLIB verions. This seems
  to be the first time that we compile things differently due to different
  GLIB versions. I also removed an incorrect comment from GObject:
  The semantic of makeGObject and constructGObject stays the same as before.
  
  There's a glitch when building Structs.hsc: cpp complaints that the
  GLIB version definitions are duplicated. This is true, but it elludes
  me why this doesn't happen for the GTK and PANGO macros, too.
  

    hunk ./configure.ac 419
    +dnl Also allow us to conditionally compile bindings to Glib APIs.
    +GLIB_VERSION=`$PKG_CONFIG glib-2.0 --modversion`
    +GLIB_MAJOR_VERSION=`echo $GLIB_VERSION | $CUT -d. -f1`
    +GLIB_MINOR_VERSION=`echo $GLIB_VERSION | $CUT -d. -f2`
    +GLIB_MICRO_VERSION=`echo $GLIB_VERSION | $CUT -d. -f3`
    +AC_DEFINE_UNQUOTED(GLIB_MAJOR_VERSION, ($GLIB_MAJOR_VERSION), [Glib major version number])
    +AC_DEFINE_UNQUOTED(GLIB_MINOR_VERSION, ($GLIB_MINOR_VERSION), [Glib minor version number])
    +AC_DEFINE_UNQUOTED(GLIB_MICRO_VERSION, ($GLIB_MICRO_VERSION), [Glib minor patch level])
    +AH_BOTTOM([
    +/* Allow code to be compiled differently for different versions of Glib */
    +#define GLIB_CHECK_VERSION(major,minor,micro)    \
    +    (GLIB_MAJOR_VERSION > (major) || \
    +     (GLIB_MAJOR_VERSION == (major) && GLIB_MINOR_VERSION > (minor)) || \
    +     (GLIB_MAJOR_VERSION == (major) && GLIB_MINOR_VERSION == (minor) && \
    +      GLIB_MICRO_VERSION >= (micro)))
    +])
    +
    hunk ./glib/System/Glib/GObject.chs.pp 90
    -#if GTK_CHECK_VERSION(2,10,0)
    +#if GLIB_CHECK_VERSION(2,10,0)
    hunk ./glib/System/Glib/GObject.chs.pp 148
    ---
    --- * Note that from Glib 2.10 onwards, 'makeNewGObject' and
    ---   'constructNewGObject' are semantically synonyms. In these new Glib
    ---   implementations, each newly created 'GObject' has a reference count
    ---   of zero (and a floating reference to keep it alive until it is
    ---   referenced). However, for older Glib releases, the distinction
    ---   is crucial.