added detect_arch function and ARCH global variable

config.sh

@@ -19,6 +19,7 @@ function load_config {
     fi
 
     OS=$(detect_os)
+    ARCH=$(detect_arch)
     myprint_quiet $quiet "${GREEN}detected OS: $OS"
 
     # getting version of cbuild installation

detect_os.sh

@@ -3,9 +3,9 @@
 include "cbuild/myprint.sh"
 
 function detect_os {
-    local uname_rezult="$(uname -o)"
-    # myprint "uname rezult: '$uname_rezult'"
-    case "$uname_rezult" in
+    local uname_result="$(uname -o)"
+    # myprint "uname result: '$uname_result'"
+    case "$uname_result" in
         Msys | Cygwin | MS/Windows)
             safeprint WINDOWS
             ;;
@@ -19,7 +19,28 @@ function detect_os {
             safeprint MACOS
             ;;
         *)
-            error "unknown operating system: $uname_rezult"
+            error "unknown operating system: $uname_result"
+            ;;
+    esac
+}
+
+function detect_arch {
+    local uname_result="$(uname -m)"
+    case "$uname_result" in
+        arm | arm32 | armhf | aarch32)
+            safeprint arm32
+            ;;
+        arm64 | aarch64 | aarch64_be | armv8b | armv8l)
+            safeprint arm64
+            ;;
+        x86 | i386 | i486 | i686)
+            safeprint x86
+            ;;
+        x64 | x86_64 | amd64)
+            safeprint x64
+            ;;
+        *)
+            error "unknown CPU architecture: $uname_result"
             ;;
     esac
 }