build: Use command -v in preference to which

Signed-off-by: Andrew Cooper <[email protected]>

Author: andyhhp

Makefile

@@ -50,8 +50,8 @@ INSTALL_DIR     := $(INSTALL) -d -p
 INSTALL_PROGRAM := $(INSTALL) -p
 
 # Best effort attempt to find a python interpreter, defaulting to Python 3 if
-# available.  Fall back to just `python` if `which` is nowhere to be found.
-PYTHON_INTERPRETER := $(word 1,$(shell which python3 python python2 2>/dev/null) python)
+# available.  Fall back to just `python`.
+PYTHON_INTERPRETER := $(word 1,$(shell command -v python3 || command -v python || command -v python2) python)
 PYTHON             ?= $(PYTHON_INTERPRETER)
 
 export CC LD CPP INSTALL INSTALL_DATA INSTALL_DIR INSTALL_PROGRAM OBJCOPY PYTHON