+########################################
+#GCC-7
+gcc-7-root: $GCC7_ROOT/bin
+gcc-7-cxx: g++-7
+gcc-7-cc: gcc-7
+gcc-7-boost: $BOOST_ROOT
+gcc-7-cxxflags: -march=native
+gcc-7-exe-ldflags: -Wl,-rpath=$GCC7_ROOT/lib64
+gcc-7-extlib: rt
+gcc-7-64-boost-lib: stage64-gcc7/lib
+gcc-7-64-asan-boost-lib: stage64-gcc7-asan/lib
+gcc-7-64-tsan-boost-lib: stage64-gcc7-tsan/lib
+gcc-7-gtest: $GTEST_ROOT
+gcc-7-64-gtest-lib: $GTEST_ROOT/lib-gcc7/libgtest.a
+