Fix PORTABLE usage

We don't use CMake, but Makefiles.

Signed-off-by: David Abdurachmanov <david.abdurachmanov@gmail.com>

rocksdb.spec

@@ -1,6 +1,6 @@
 Name:       rocksdb
 Version:    5.7.3
-Release:    3%{?dist}
+Release:    3.0.riscv64%{?dist}
 Summary:    A Persistent Key-Value Store for Flash and RAM Storage
 
 License:    BSD
@@ -40,10 +40,10 @@ rm build_tools/gnu_parallel
 %build
 export CFLAGS="%{optflags}"
 export EXTRA_CXXFLAGS=" -std=c++11 %{optflags}"
-make %{?_smp_mflags} shared_lib
+PORTABLE=1 make %{?_smp_mflags} shared_lib PORTABLE=ON
 
 %install
-make install-shared \
+PORTABLE=1 make install-shared \
          INSTALL_PREFIX=%{buildroot}\
          LIB_INSTALL_DIR=%{_libdir}\
          INCLUDE_INSTALL_DIR=%{_includedir}
@@ -64,6 +64,9 @@ make install-shared \
 %{_includedir}/*
 
 %changelog
+* Fri Jun 22 2018 David Abdurachmanov <david.abdurachmanov@gmail.com> - 5.7.3-3.0.riscv64
+- Set PORTABLE=ON to avoid -march=native
+
 * Wed Mar 07 2018 Adam Williamson <awilliam@redhat.com> - 5.7.3-3
 - Rebuild to fix GCC 8 mis-compilation
   See https://da.gd/YJVwk ("GCC 8 ABI change on x86_64")