core: use GLIB_VERSION_MAX_ALLOWED=2.28

We want to build/run even on relatively old OSes, so that we can
be used to bootstrap and maintain newer builds.

diff --git a/Makefile.am b/Makefile.am
index 9d31e098c352d1f9e04e12856d8fc80859952fba..fba107fd21d59f4909897b5159370ae04037ae09 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -16,7 +16,8 @@
 # Boston, MA 02111-1307, USA.
 
 ACLOCAL_AMFLAGS = -I m4 ${ACLOCAL_FLAGS}
-AM_CPPFLAGS = -DDATADIR='"$(datadir)"' -DLIBEXECDIR='"$(libexecdir)"'
+AM_CPPFLAGS = -DDATADIR='"$(datadir)"' -DLIBEXECDIR='"$(libexecdir)"' \
+       -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_28 -DGLIB_VERSION_MAX_ALLOWED=GLIB_VERSION_2_28
 AM_CFLAGS = $(WARN_CFLAGS)
 
 NULL =