[gimp/wip/Jehan/meson-windows-official: 13/14] configure, meson: the build tool depends on very old glib.

[Jehan <jehanp src gnome org>]

commit 7a22a6b03aa325269e6e65d234be6acc98f1bcd6
Author: Jehan <jehan girinstud io>
Date:   Fri Apr 1 15:41:17 2022 +0200

    configure, meson: the build tool depends on very old glib.
    
    For the build tool, we really don't need a recent GLib. Checking the few
    function docs, GLib 2.2 is fine, which (looking at git logs) means any
    version after 2002. At this point, it's nearly unneeded to add a minimum
    required version, but let's be thorough.
    
    Anyway really no need to block a build if we have an old build GLib,
    which is completely enough, as long we have the recent host GLib.

 configure.ac | 11 +++++++----
 meson.build  |  3 ++-
 2 files changed, 9 insertions(+), 5 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f17b290ed1..a8820b5c14 100644
--- a/configure.ac
+++ b/configure.ac
@@ -98,6 +98,9 @@ m4_define([wmf_required_version], [0.2.8])
 # version of gettext with more version numbers, please update the tests.
 m4_define([xgettext_required_version], [0.19])
 
+# required versions for build-time only tools
+m4_define([native_glib_required_version], [2.2.0])
+
 AC_INIT([GIMP], [gimp_version],
         [https://gitlab.gnome.org/GNOME/gimp/issues/new],
         [gimp])
@@ -2571,7 +2574,7 @@ if test "x$enable_vector_icons" != "xno"; then
        test -f "$gdk_pixbuf_moduledir/libpixbufloader-svg.so"; then
       # We must not use $PKG_CONFIG nor PKG_CHECK_* macros because we need
       # to make sure we use the native pkg-config (in case we cross-compile).
-      if pkg-config --atleast-version=glib_required_version glib-2.0 &&
+      if pkg-config --atleast-version=native_glib_required_version glib-2.0 &&
          pkg-config gio-2.0; then
         NATIVE_GLIB_LIBS=`pkg-config --libs gio-2.0 glib-2.0`
         NATIVE_GLIB_CFLAGS=`pkg-config --cflags gio-2.0 glib-2.0`
@@ -2585,7 +2588,7 @@ WARNING: You enabled vector icons on Win32. Make sure to run:
        so that GdkPixbuf knows where to find the SVG loader."
         fi
       else
-        enable_vector_icons="no (missing native glib-2.0 > glib_required_version or gio-2.0)"
+        enable_vector_icons="no (missing native glib-2.0 > native_glib_required_version or gio-2.0)"
       fi
     else
       enable_vector_icons="no (librsvg GdkPixbuf loader missing)"
@@ -2615,7 +2618,7 @@ WARNING: vector icons are disabled. Be aware that librsvg is still
   fi
 fi
 
-if pkg-config --atleast-version=glib_required_version glib-2.0 &&
+if pkg-config --atleast-version=native_glib_required_version glib-2.0 &&
    pkg-config gio-2.0; then
   NATIVE_GLIB_LIBS=`pkg-config --libs gio-2.0 glib-2.0 gmodule-2.0`
   NATIVE_GLIB_CFLAGS=`pkg-config --cflags gio-2.0 glib-2.0 gmodule-2.0`
@@ -2628,7 +2631,7 @@ if pkg-config --atleast-version=glib_required_version glib-2.0 &&
     add_deps_error([native librsvg-2.0], [Could not find librsvg for the build system.])
   fi
 else
-  add_deps_error([native glib], [Could not find GLib for the build system.])
+  add_deps_error([native glib], [Could not find native GLib for the build system.])
 fi
 
 AC_SUBST(NATIVE_GLIB_LIBS)
diff --git a/meson.build b/meson.build
index cfa9e368bd..54d1175019 100644
--- a/meson.build
+++ b/meson.build
@@ -1064,7 +1064,8 @@ else
   warnings += vec_warning
 endif
 
-native_glib = dependency('glib-2.0',    version: '>='+glib_minver, native: true)
+native_glib_minver = '2.2.0'
+native_glib = dependency('glib-2.0',    version: '>='+native_glib_minver, native: true)
 native_rsvg = dependency('librsvg-2.0', version: '>='+rsvg_minver, native: true)
 
 # Running tests headless