diff --git a/.gitignore b/.gitignore
index 03e7918..dc68ff9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-SOURCES/mstflint-4.0.1-1.42.g0d3b372.tar.gz
+SOURCES/mstflint-4.3.0-1.49.g9b9af70.tar.gz
diff --git a/.mstflint.metadata b/.mstflint.metadata
index 1db72fc..99a009c 100644
--- a/.mstflint.metadata
+++ b/.mstflint.metadata
@@ -1 +1 @@
-944fd1694aa02b2d6944859301a0aaecbd4d43aa SOURCES/mstflint-4.0.1-1.42.g0d3b372.tar.gz
+855bec1f6d33277857bf2c19eccdc20cbc8e08db SOURCES/mstflint-4.3.0-1.49.g9b9af70.tar.gz
diff --git a/SPECS/mstflint.spec b/SPECS/mstflint.spec
index 3274b39..3955974 100644
--- a/SPECS/mstflint.spec
+++ b/SPECS/mstflint.spec
@@ -1,12 +1,11 @@
 Name:		mstflint
 Summary:	Mellanox firmware burning tool
-Version:	4.0.1
-Release:	1%{?dist}
+Version:	4.3.0
+Release:	1.49.g9b9af70.1%{?dist}
 License:	GPLv2+ or BSD
 Group:		Applications/System
-Source:		https://www.openfabrics.org/downloads/%{name}/%{name}-%{version}-1.42.g0d3b372.tar.gz
+Source:		https://www.openfabrics.org/downloads/%{name}/%{name}-%{version}-1.49.g9b9af70.tar.gz
 Url:		http://www.openfabrics.org
-BuildRoot:	%{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires:	libstdc++-devel, zlib-devel, libibmad-devel
 Obsoletes:	openib-mstflint <= 1.4 openib-tvflash <= 0.9.2 tvflash <= 0.9.0
 ExcludeArch:	s390 s390x
@@ -17,28 +16,32 @@ It also provides access to the relevant source code.
 
 %prep
 %setup -q
+find . -type f -iname '*.[ch]' -exec chmod a-x '{}' ';'
+find . -type f -iname '*.cpp' -exec chmod a-x '{}' ';'
 
 %build
-%configure CFLAGS="$CFLAGS -fno-strict-aliasing"
-make
+export CFLAGS="$RPM_OPT_FLAGS"
+export CXXFLAGS="$RPM_OPT_FLAGS -std=gnu++98 -Wno-c++11-compat"
+%configure
+%make_build
 
 %install
-rm -rf %{buildroot}
 make DESTDIR=%{buildroot} install
 # Remove the devel files that we don't ship
 rm -fr %{buildroot}%{_includedir}
 rm -fr %{buildroot}%{_datadir}
 rm -fr %{buildroot}%{_libdir}/*.a
 
-%clean
-rm -rf %{buildroot}
-
 %files
-%defattr(-, root, root)
 %doc README
 %_bindir/*
 
 %changelog
+* Wed Apr 20 2016 Honggang Li <honli@redhat.com> - 4.3.0-1.49.g9b9af70.1
+- Rebase to latest upstream version 4.3.0-1.49.g9b9af70.
+- Spec file cleanup.
+- Related: bz1277500
+
 * Mon Jun 22 2015 Michal Schmidt <mschmidt@redhat.com> - 4.0.1-1
 - Update to latest upstream release.
 - Related: bz1164542