Compiling glulxe c1c3a3140 with remglk-026, I had to comment out the definition of GIDISPATCH_AUTORESTORE_REGISTRY from gi_dispa.h to avoid the following linker error:
glkop.c:215: undefined reference to `gidispatch_set_autorestore_registry'
I'm not sure how remglk is supposed to link with iosglk. Is gi_dispa.h:74 supposed to be an #ifdef?