diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index 91ed1a566d..8adf3f485e 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -4340,13 +4340,18 @@ component_build_aes_aesce_armcc () {
 }
 
 support_build_sha_armce() {
-    # clang >= 4 is required to build with SHA extensions
-    clang_ver="$(clang --version|grep version|sed -E 's#.*version ([0-9]+).*#\1#')"
+    if ( $(which clang > /dev/null) ); then
+        # clang >= 4 is required to build with SHA extensions
+        clang_ver="$(clang --version|grep version|sed -E 's#.*version ([0-9]+).*#\1#')"
 
-    # we need asm/hwcap.h available for runtime detection
-    echo '#include <asm/hwcap.h>' | clang -E - >/dev/null 2>&1 && have_hwcap=1 || have_hwcap=0
+        # we need asm/hwcap.h available for runtime detection
+        echo '#include <asm/hwcap.h>' | clang -E - >/dev/null 2>&1 && have_hwcap=1 || have_hwcap=0
 
-    [[ "${clang_ver}" -ge 4 && "${have_hwcap}" -eq 1 ]]
+        [[ "${clang_ver}" -ge 4 && "${have_hwcap}" -eq 1 ]]
+    else
+        # clang not available
+        false
+    fi
 }
 
 component_build_sha_armce () {