With the following two patches, I was able to build emacs:

in puresize.h

-#define BASE_PURESIZE (1102000 + SYSTEM_PURESIZE_EXTRA +
SITELOAD_PURESIZE_EXTRA)
+#define BASE_PURESIZE (1235000 + SYSTEM_PURESIZE_EXTRA +
SITELOAD_PURESIZE_EXTRA)

in alloc.c

-#define NSTATICS 1280
+#define NSTATICS 2032

However, I can't type anything into the buffer in the resulting emacs.

I configured it with:

./configure --with-x-toolkit=gtk --enable-font-backend  --with-xft

Duncan.