Trying to do jhbuild buildone glib today (git master), I get:

  CC     gatomic.lo
deprecated/gthread-deprecated.c: In function 'g_static_private_set':
deprecated/gthread-deprecated.c:1387:36: error: expected expression before 'guint'
deprecated/gthread-deprecated.c: In function 'g_static_private_free':
deprecated/gthread-deprecated.c:1444:44: error: expected expression before 'guint'
make[4]: *** [gthread-deprecated.lo] Error 1
make[4]: *** Waiting for unfinished jobs....
gasyncqueue.c: In function 'g_async_queue_pop_intern_unlocked':
gasyncqueue.c:418:11: warning: 'g_cond_timed_wait' is deprecated (declared at deprecated/gthread.h:279) [-Wdeprecated-declarations]
make[4]: Leaving directory `/home/andres121/checkout/gnome/glib/glib'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/home/andres121/checkout/gnome/glib/glib'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/andres121/checkout/gnome/glib/glib'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/andres121/checkout/gnome/glib'
make: *** [all] Error 2
*** Error during phase build of glib: ########## Error running make -j 4 *** [1/1]