Provide state/error handling for linear algebra

src/CMakeLists.txt

@@ -23,7 +23,9 @@ set(fppFiles
     stdlib_linalg_diag.fypp
     stdlib_linalg_outer_product.fypp
     stdlib_linalg_kronecker.fypp
+    stdlib_linalg_constants.fypp
     stdlib_linalg_cross_product.fypp
+    stdlib_linalg_state.fypp 
     stdlib_optval.fypp
     stdlib_selection.fypp
     stdlib_sorting.fypp

src/stdlib_linalg_constants.fypp

@@ -0,0 +1,18 @@
+#:include "common.fypp"
+module stdlib_linalg_constants
+     use stdlib_kinds, only: sp, dp, qp, int32, int64, lk
+     use, intrinsic :: ieee_arithmetic, only: ieee_is_nan 
+!$   use omp_lib
+     implicit none(type,external)
+     public
+
+
+     ! Integer size support for ILP64 builds should be done here
+     integer, parameter :: ilp = int32
+     private            :: int32, int64
+
+
+
+
+
+end module stdlib_linalg_constants