Problem: Can't generate proto file for Python 3.
Solution: Add PYTHON3_CFLAGS to LINT_CFLAGS.
# with "-E".
OSDEF_CFLAGS = $(PRE_DEFS) $(POST_DEFS)
-LINT_CFLAGS = -DLINT -I. $(PRE_DEFS) $(POST_DEFS) $(RUBY_CFLAGS) $(LUA_CFLAGS) $(PERL_CFLAGS) $(PYTHON_CFLAGS) -Dinline= -D__extension__= -Dalloca=alloca
+LINT_CFLAGS = -DLINT -I. $(PRE_DEFS) $(POST_DEFS) $(RUBY_CFLAGS) $(LUA_CFLAGS) $(PERL_CFLAGS) $(PYTHON_CFLAGS) $(PYTHON3_CFLAGS) -Dinline= -D__extension__= -Dalloca=alloca
LINT_EXTRA = -DUSE_SNIFF -DHANGUL_INPUT -D"__attribute__(x)="
static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 565,
/**/
564,
/**/