diff -Nru ocaml-4.01.0/debian/changelog ocaml-4.01.0/debian/changelog
--- ocaml-4.01.0/debian/changelog	2014-10-30 09:07:57.000000000 +0000
+++ ocaml-4.01.0/debian/changelog	2015-01-24 10:30:20.000000000 +0000
@@ -1,3 +1,12 @@
+ocaml (4.01.0-5+rpi1) jessie-staging; urgency=low
+
+  * Add logic in debian/rules to detect raspbian and give the upstream 
+    configure script the correct instructions.
+  * Fix upstream build scripts to pass "model" when building .p.o files
+    from assembler files.
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Sat, 24 Jan 2015 10:29:46 +0000
+
 ocaml (4.01.0-5) unstable; urgency=medium
 
   [ Ralf Treinen ]
diff -Nru ocaml-4.01.0/debian/patches/pass-model-p.o.patch ocaml-4.01.0/debian/patches/pass-model-p.o.patch
--- ocaml-4.01.0/debian/patches/pass-model-p.o.patch	1970-01-01 00:00:00.000000000 +0000
+++ ocaml-4.01.0/debian/patches/pass-model-p.o.patch	2015-01-24 10:30:20.000000000 +0000
@@ -0,0 +1,30 @@
+Description: Pass "model" when building .p.o files from assembler files.
+ The upstream build system passed -DMODEL_$(MODEL) when building .o files but
+ not when building .p.o files. When building for raspbian (with the correct
+ v6 configuration) this resulted in arm.p.o coming out with v7 code.
+Author: Peter Michael Green <plugwash@raspbian.org>
+
+---
+The information above should follow the Patch Tagging Guidelines, please
+checkout http://dep.debian.net/deps/dep3/ to learn about the format. Here
+are templates for supplementary fields that you might want to add:
+
+Origin: <vendor|upstream|other>, <url of original patch>
+Bug: <url in upstream bugtracker>
+Bug-Debian: http://bugs.debian.org/<bugnumber>
+Bug-Ubuntu: https://launchpad.net/bugs/<bugnumber>
+Forwarded: <no|not-needed|url proving that it has been forwarded>
+Reviewed-By: <name and email of someone who approved the patch>
+Last-Update: <YYYY-MM-DD>
+
+--- ocaml-4.01.0.orig/asmrun/Makefile
++++ ocaml-4.01.0/asmrun/Makefile
+@@ -180,7 +180,7 @@ clean::
+           exit 2; }
+ 
+ .S.p.o:
+-	$(ASPP) -DSYS_$(SYSTEM) $(ASPPPROFFLAGS) -o $*.p.o $*.S
++	$(ASPP) -DSYS_$(SYSTEM) -DMODEL_$(MODEL) $(ASPPPROFFLAGS) -o $*.p.o $*.S
+ 
+ .c.d.o:
+ 	ln -s -f $*.c $*.d.c
diff -Nru ocaml-4.01.0/debian/patches/series ocaml-4.01.0/debian/patches/series
--- ocaml-4.01.0/debian/patches/series	2014-10-30 08:25:19.000000000 +0000
+++ ocaml-4.01.0/debian/patches/series	2015-01-24 10:30:20.000000000 +0000
@@ -15,3 +15,4 @@
 0015-Fix-native-backtraces-on-arm.patch
 0016-Make-ocamlopt-g-more-resistant-to-ill-formed-locatio.patch
 0017-Fix-lost-locations-in-out-of-bounds-exceptions.patch
+pass-model-p.o.patch
diff -Nru ocaml-4.01.0/debian/rules ocaml-4.01.0/debian/rules
--- ocaml-4.01.0/debian/rules	2014-10-30 08:25:19.000000000 +0000
+++ ocaml-4.01.0/debian/rules	2015-01-24 10:30:20.000000000 +0000
@@ -59,8 +59,19 @@
 export OCAML_OPT_ARCH
 export OCAML_STDLIB_DIR
 
-CONFIGURE_OPTS := \
-  --host $(DEB_BUILD_GNU_TYPE)\
+ifeq ($(DEB_BUILD_ARCH),armhf)
+  IS_RASPBIAN := $(shell dpkg-vendor --derives-from Raspbian && echo yes || echo no)
+else
+  IS_RASPBIAN := no
+endif
+
+ifeq ($(IS_RASPBIAN),yes)
+  CONFIGURE_OPTS := --host armv6-unknown-linux-gnueabihf
+else
+  CONFIGURE_OPTS := --host $(DEB_BUILD_GNU_TYPE)
+endif 
+
+CONFIGURE_OPTS += \
   --with-pthread -prefix $(DEB_TEST_BUILD_PREFIX)/usr \
   -libdir $(DEB_TEST_BUILD_PREFIX)$(OCAML_STDLIB_DIR) \
   -x11lib "$(shell pkg-config --variable=libdir x11)" \