diff --git a/LICENSE.md b/LICENSE.md
index 24c6b7e4cb998..1070bdb9ebadd 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -74,6 +74,7 @@ Julia builds the following libraries by default, but does not use them itself:
 Julia's build process uses the following external tools:
 
 - [PATCHELF](http://hydra.nixos.org/build/1524660/download/1/README)
+- [OBJCONV](http://www.agner.org/optimize/#objconv)
 
 
 Julia bundles the following external programs and libraries on some platforms:
diff --git a/deps/Makefile b/deps/Makefile
index 6f26dca633328..4e5b75f302ab4 100644
--- a/deps/Makefile
+++ b/deps/Makefile
@@ -19,7 +19,7 @@ CONFIGURE_COMMON += F77="$(FC)" CC="$(CC)" CXX="$(CXX)"
 MAKE_COMMON = DESTDIR="" prefix=$(build_prefix) bindir=$(build_bindir) libdir=$(build_libdir) libexecdir=$(build_libexecdir) datarootdir=$(build_datarootdir) includedir=$(build_includedir) sysconfdir=$(build_sysconfdir)
 
 #autoconf configure-driven scripts: llvm pcre arpack fftw unwind gmp mpfr patchelf uv
-#custom Makefile rules: openlibm Rmath dsfmt suitesparse-wrapper suitesparse lapack openblas mojibake
+#custom Makefile rules: openlibm Rmath dsfmt suitesparse-wrapper suitesparse lapack openblas mojibake objconv
 
 # prevent installing libs into usr/lib64 on opensuse
 unexport CONFIG_SITE
@@ -77,6 +77,11 @@ endif
 
 ifeq ($(USE_SYSTEM_BLAS), 0)
 STAGE1_DEPS += openblas
+ifeq ($(USE_BLAS64), 1)
+ifeq ($(OS), Darwin)
+STAGE1_DEPS += objconv
+endif
+endif
 endif
 
 ifeq ($(USE_SYSTEM_FFTW), 0)
@@ -140,7 +145,7 @@ install: $(addprefix install-, $(DEP_LIBS))
 cleanall: $(addprefix clean-, $(DEP_LIBS))
 distcleanall: $(addprefix distclean-, $(DEP_LIBS))
 	rm -rf $(build_prefix)
-getall: get-llvm get-uv get-pcre get-openlibm get-openspecfun get-dsfmt get-Rmath get-openblas get-lapack get-fftw get-suitesparse get-arpack get-unwind get-osxunwind get-gmp get-mpfr get-patchelf get-mojibake get-virtualenv
+getall: get-llvm get-uv get-pcre get-openlibm get-openspecfun get-dsfmt get-Rmath get-openblas get-lapack get-fftw get-suitesparse get-arpack get-unwind get-osxunwind get-gmp get-mpfr get-patchelf get-mojibake get-virtualenv get-objconv
 
 ## PATHS ##
 # sort is used to remove potential duplicates
@@ -830,8 +835,9 @@ endif
 # 64-bit BLAS interface
 ifeq ($(USE_BLAS64), 1)
 OPENBLAS_BUILD_OPTS += INTERFACE64=1 SYMBOLSUFFIX="64_"
-ifeq ($(OS),Darwin)
+ifeq ($(OS), Darwin)
 OPENBLAS_BUILD_OPTS += OBJCONV=$(JULIAHOME)/deps/objconv/objconv
+$(OPENBLAS_OBJ_SOURCE): $(OBJCONV_SOURCE)
 endif
 endif
 
@@ -1693,6 +1699,33 @@ compile-virtualenv: $(VIRTUALENV_SOURCE)
 check-virtualenv: compile-virtualenv
 install-virtualenv: $(VIRTUALENV_TARGET)
 
+## objconv ##
+
+OBJCONV_SOURCE = objconv/objconv
+OBJCONV_TARGET = $(build_bindir)/objconv
+
+objconv.zip:
+	$(JLDOWNLOAD) $@ http://www.agner.org/optimize/objconv.zip
+objconv/config.status: objconv.zip
+	unzip -d objconv $<
+	cd objconv && unzip source.zip
+	echo 1 > $@
+$(OBJCONV_SOURCE): objconv/config.status
+	cd objconv && $(CXX) -o objconv -O2 *.cpp
+$(OBJCONV_TARGET): $(OBJCONV_SOURCE) | $(build_bindir)
+	cp -f $< $@
+
+clean-objconv:
+	-rm -f $(OBJCONV_TARGET)
+distclean-objconv:
+	-rm -rf objconv.zip objconv
+
+get-objconv: objconv.zip
+configure-objconv: objconv/config.status
+compile-objconv: $(OBJCONV_SOURCE)
+check-objconv: compile-objconv
+install-objconv: $(OBJCONV_TARGET)
+
 ## phony targets ##
 
 .PHONY: default compile install cleanall distcleanall \