Something else must've changed on your system; most probably the
development packages for glib and configure haven't been properly
re-run in between. Meither GEGL nor GIMP manages to pick up glib
properly, GEGL fails to pick up the headers while the GIMP build fails
finding glib/gobject related sym
I have finding problems to compile the last git master.
Thanks
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GIMP
Error make of 'gimp' with last update
make[4]: Leaving directory `/home/jag/devel/gimp-2.9/app/gui'
Making all in .
make[4]: Entering directory `/home/jag/devel/gimp-2.9/app'
CC version.o
CC gimp_console_2.9-ve