cpu_arch more robust

Author: scivision

+stdlib/+native/cpu_arch.m

@@ -1,17 +1,21 @@
-%% CPU_ARCH get the CPU architecture
+%% CPU_ARCH get the Operating System CPU architecture
+%
+% This function retrieves the CPU architecture of the current operating system.
+% The physical CPU architecture can be obscured and even determining it in high-level
+% languages like Python is not exactly trivial.
+% This method is as used by
+% <https://cmake.org/cmake/help/latest/variable/CMAKE_HOST_SYSTEM_PROCESSOR.html CMake>.
 %
 %%% Outputs
-% * a: Returns the CPU architecture as a string.
-% * b: backend used
-
-function [a, b] = cpu_arch(backend)
-arguments
-  backend (1,:) string = ["java", "dotnet", "native"]
-end
+% * a: the CPU architecture as a character vector:
 
-o = stdlib.Backend(mfilename(), backend);
-a = o.func();
+function a = cpu_arch()
 
-b = o.backend;
+if ispc()
+  a = getenv("PROCESSOR_ARCHITECTURE");
+else
+  [~, a] = system('uname -m');
+  a = strip(a);
+end
 
 end

+stdlib/cpu_arch.m

@@ -4,7 +4,6 @@
 
 
 properties (TestParameter)
-B_cpu_arch
 B_cpu_load
 B_ram_free
 B_ram_total
@@ -17,8 +16,7 @@
 end
 
 methods (TestParameterDefinition, Static)
-function [B_cpu_arch, B_cpu_load, B_ram_free, B_ram_total, B_is_admin, B_os_version, B_hostname, B_username, B_get_uid, B_get_process_priority] = setupBackends()
-B_cpu_arch = init_backend("cpu_arch");
+function [B_cpu_load, B_ram_free, B_ram_total, B_is_admin, B_os_version, B_hostname, B_username, B_get_uid, B_get_process_priority] = setupBackends()
 B_cpu_load = init_backend("cpu_load");
 B_ram_free = init_backend("ram_free");
 B_ram_total = init_backend("ram_total");
@@ -97,8 +95,8 @@ function test_username(tc, B_username)
 end
 
 
-function test_cpu_arch(tc, B_cpu_arch)
-arch = stdlib.cpu_arch(B_cpu_arch);
+function test_cpu_arch(tc)
+arch = stdlib.cpu_arch();
 tc.verifyClass(arch, 'char')
 tc.verifyGreaterThan(strlength(arch), 0, "CPU architecture should not be empty")
 end