Using the latest download of Emacs master branch (tonight November 2, 2015 at about 10:15 p.m. PST) and fringe2.diff, I was not able to complete the building process. I only tried one time, but think the same result would probably happen if I tried again.
font.c: In function 'font_fill_lglyph_metrics':
font.c:4356: warning: comparison is always true due to limited range of data type
font.c:4356: warning: comparison is always true due to limited range of data type
font.c:4356: warning: comparison is always true due to limited range of data type
font.c:4356: warning: comparison is always true due to limited range of data type
font.c: In function 'Ffont_variation_glyphs':
font.c:4473: warning: comparison is always true due to limited range of data type
font.c:4473: warning: comparison is always true due to limited range of data type
font.c:4473: warning: comparison is always true due to limited range of data type
font.c:4473: warning: comparison is always true due to limited range of data type
font.c: In function 'Finternal_char_font':
font.c:4576: warning: comparison is always true due to limited range of data type
font.c:4576: warning: comparison is always true due to limited range of data type
font.c:4576: warning: comparison is always true due to limited range of data type
font.c:4576: warning: comparison is always true due to limited range of data type
font.c: In function 'Ffont_get_glyphs':
font.c:4909: warning: comparison is always true due to limited range of data type
font.c:4909: warning: comparison is always true due to limited range of data type
font.c:4909: warning: comparison is always true due to limited range of data type
font.c:4909: warning: comparison is always true due to limited range of data type
CC print.o
CC lread.o
CC syntax.o
CC unexmacosx.o
CC bytecode.o
CC process.o
process.c: In function 'record_deleted_pid':
process.c:818: warning: comparison is always true due to limited range of data type
process.c:818: warning: comparison is always true due to limited range of data type
process.c: In function 'Fprocess_id':
process.c:938: warning: comparison is always true due to limited range of data type
process.c:938: warning: comparison is always true due to limited range of data type
CC gnutls.o
CC callproc.o
CC region-cache.o
CC sound.o
CC atimer.o
CC doprnt.o
CC intervals.o
CC textprop.o
CC composite.o
composite.c: In function 'fill_gstring_body':
composite.c:843: warning: comparison is always true due to limited range of data type
composite.c:843: warning: comparison is always true due to limited range of data type
composite.c:843: warning: comparison is always true due to limited range of data type
composite.c:843: warning: comparison is always true due to limited range of data type
composite.c:843: warning: comparison is always true due to limited range of data type
composite.c:843: warning: comparison is always true due to limited range of data type
CC xml.o
CC profiler.o
CC decompress.o
CC fontset.o
CC fringe.o
CC image.o
CC nsterm.o
nsterm.m: In function 'ns_draw_fringe_bitmap':
nsterm.m:2507: error: 'len' undeclared (first use in this function)
nsterm.m:2507: error: (Each undeclared identifier is reported only once
nsterm.m:2507: error: for each function it appears in.)
make[1]: *** [nsterm.o] Error 1
make: *** [src] Error 2
~/Desktop/emacs $