adjust c++std11 flags

Author: MikeDMorgan

src/Makevars

@@ -1,6 +1,8 @@
 #PKG_CXXFLAGS = $(CXX11STD) -Wall -pedantic
-CXX11STD = CXX11
-PKG_CXXFLAGS = $(CFLAGS) $(CXX11STD) $(SHLIB_OPENMP_CXXFLAGS)
+#CXX11STD = CXX11
+## remove c++std11?
+#PKG_CXXFLAGS = $(CFLAGS) $(CXX11STD) $(SHLIB_OPENMP_CXXFLAGS)
+PKG_CXXFLAGS = $(CFLAGS) $(SHLIB_OPENMP_CXXFLAGS) -std=c++11
 PKG_LIBS = $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS) $(SHLIB_OPENMP_CXXFLAGS)
 ALL_CXXFLAGS = $(R_XTRA_CXXFLAGS) $(PKG_CXXFLAGS) $(CXXPICFLAGS) $(SHLIB_CXXFLAGS) $(CXXFLAGS)
 #PKG_CPPFLAGS = -I../inst/include -I./OsqpEigen/include -I./osqp/include/public -I./osqp/include/private