---- rocksdb-rocksdb-4.13.5/Makefile.orig 2016-12-26 19:15:47.176657758 +0100
-+++ rocksdb-rocksdb-4.13.5/Makefile 2016-12-26 19:30:42.149980874 +0100
-@@ -137,7 +137,7 @@
+--- rocksdb-rocksdb-5.2.1/Makefile.orig 2017-04-28 19:57:40.787056551 +0200
++++ rocksdb-rocksdb-5.2.1/Makefile 2017-04-28 19:58:43.773722499 +0200
+@@ -140,7 +140,7 @@
AM_LINK = $(AM_V_CCLD)$(CXX) $^ $(EXEC_LDFLAGS) -o $@ $(LDFLAGS) $(COVERAGEFLAGS)
# detect what platform we're building on
--dummy := $(shell (export ROCKSDB_ROOT="$(CURDIR)"; "$(CURDIR)/build_tools/build_detect_platform" "$(CURDIR)/make_config.mk"))
-+dummy := $(shell (export ROCKSDB_ROOT="$(CURDIR)" CFLAGS="$(CFLAGS)"; "$(CURDIR)/build_tools/build_detect_platform" "$(CURDIR)/make_config.mk"))
+-dummy := $(shell (export ROCKSDB_ROOT="$(CURDIR)"; export PORTABLE="$(PORTABLE)"; "$(CURDIR)/build_tools/build_detect_platform" "$(CURDIR)/make_config.mk"))
++dummy := $(shell (export ROCKSDB_ROOT="$(CURDIR)" CFLAGS="$(CFLAGS)"; export PORTABLE="$(PORTABLE)"; "$(CURDIR)/build_tools/build_detect_platform" "$(CURDIR)/make_config.mk"))
# this file is generated by the previous line to set build flags and sources
include make_config.mk
CLEAN_FILES += make_config.mk