The first block is to install aliases such as arm-linux-androideabi-gcc->gcc
as symlinks instead of hard links.

diff -u -r ../gcc-4.9.3/gcc/Makefile.in ./gcc/Makefile.in
--- ../gcc-4.9.3/gcc/Makefile.in	2014-10-16 09:50:42.000000000 -0400
+++ ./gcc/Makefile.in	2015-08-16 18:12:44.446098799 -0400
@@ -260,7 +260,7 @@
 INSTALL = @INSTALL@
 # Some systems may be missing symbolic links, regular links, or both.
 # Allow configure to check this and use "ln -s", "ln", or "cp" as appropriate.
-LN=@LN@
+LN=@LN_S@
 LN_S=@LN_S@
 # These permit overriding just for certain files.
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
@@ -2430,27 +2430,29 @@
 
 gengtype-lex.o build/gengtype-lex.o : gengtype-lex.c gengtype.h $(SYSTEM_H)
 gengtype-lex.o: $(CONFIG_H) $(BCONFIG_H)
-CFLAGS-gengtype-lex.o += -DGENERATOR_FILE
+CFLAGS-build/gengtype-lex.o += -DGENERATOR_FILE
 build/gengtype-lex.o: $(BCONFIG_H)
 
 gengtype-parse.o build/gengtype-parse.o : gengtype-parse.c gengtype.h \
   $(SYSTEM_H)
 gengtype-parse.o: $(CONFIG_H)
-CFLAGS-gengtype-parse.o += -DGENERATOR_FILE
+CFLAGS-build/gengtype-parse.o += -DGENERATOR_FILE
 build/gengtype-parse.o: $(BCONFIG_H)
 
 gengtype-state.o build/gengtype-state.o: gengtype-state.c $(SYSTEM_H) \
   gengtype.h errors.h double-int.h version.h $(HASHTAB_H) $(OBSTACK_H) \
   $(XREGEX_H)
 gengtype-state.o: $(CONFIG_H)
-CFLAGS-gengtype-state.o += -DGENERATOR_FILE
+CFLAGS-gengtype-state.o += -DGENERATOR_FILE2
+CFLAGS-build/gengtype-state.o += -DGENERATOR_FILE
 build/gengtype-state.o: $(BCONFIG_H)
 
 gengtype.o build/gengtype.o : gengtype.c $(SYSTEM_H) gengtype.h 	\
   rtl.def insn-notes.def errors.h double-int.h version.h $(HASHTAB_H) \
   $(OBSTACK_H) $(XREGEX_H)
 gengtype.o: $(CONFIG_H)
-CFLAGS-gengtype.o += -DGENERATOR_FILE
+CFLAGS-gengtype.o += -DGENERATOR_FILE2
+CFLAGS-build/gengtype.o += -DGENERATOR_FILE
 build/gengtype.o: $(BCONFIG_H)
 
 build/genmddeps.o: genmddeps.c $(BCONFIG_H) $(SYSTEM_H) coretypes.h	\
@@ -2515,7 +2517,7 @@
 # any system header is included.
 gengtype-lex.c : gengtype-lex.l
 	-$(FLEX) $(FLEXFLAGS) -o$@ $< && { \
-	  echo '#include "bconfig.h"' > $@.tmp; \
+	  echo '' > $@.tmp; \
 	  cat $@ >> $@.tmp; \
 	  mv $@.tmp $@; \
 	}