CMake: Remove references of APP_TARGET

This needs to be removed as there should not be a
name requirement for application CMake variable name.
Furthermore, in certain uses cases it prevents
successful builds for some Mbed targets. For instance
when building Greentea test applications for Mbed
targets that require post build operations as they do
not define APP_TARGET.

targets/TARGET_Cypress/scripts/PSOC6.py

@@ -17,6 +17,7 @@
 #
 
 import argparse
+import pathlib
 import logging
 import os
 import sys
@@ -59,6 +60,12 @@ class AddSignatureError(Exception):
     adding signature to Secure Boot image
     """
 
+
+class ArtefactsError(Exception):
+    """An exception to indicate that the artefact(s) needed for processing 
+    ave not been found."""
+
+
 # Base class for all configuration exceptions
 class ConfigException(Exception):
     """Config system only exception. Makes it easier to distinguish config
@@ -306,13 +313,29 @@ def complete(message_func, elf0, hexf0, hexf1=None):
 
 def merge_action(args):
     """Entry point for the "merge" CLI command."""
+    try:
+        elf_file = list(pathlib.Path(args.artefacts_location).glob("*.elf"))[0]
+        m4hex_file = list(pathlib.Path(args.artefacts_location).glob("*.hex"))[0]
+    except IndexError:
+        raise ArtefactsError(
+            f"Could not find elf and/or hex file in {args.artefacts_location}"
+        )
+
     complete_func(
-        print, args.elf, args.m4hex, args.m0hex
+        print, elf_file, m4hex_file, args.m0hex
     )
 
 
 def sign_action(args):
     """Entry point for the "sign" CLI command."""
+    try:
+        elf_file = list(pathlib.Path(args.artefacts_location).glob("*.elf"))[0]
+        m4hex_file = list(pathlib.Path(args.artefacts_location).glob("*.hex"))[0]
+    except IndexError:
+        raise ArtefactsError(
+            f"Could not find elf and/or hex file in {args.artefacts_location}"
+        )
+
     sign_hex(
         args.build_dir,
         args.m0hex_filename,
@@ -322,8 +345,8 @@ def sign_action(args):
         args.boot_scheme,
         args.cm0_img_id,
         args.cm4_img_id,
-        args.elf,
+        elf_file,
-        args.m4hex,
+        m4hex_file,
         args.m0hex
     )
 
@@ -340,10 +363,7 @@ def parse_args():
         "merge", help="Merge Cortex-M4 and Cortex-M0 HEX files."
     )
     merge_subcommand.add_argument(
-        "--elf", required=True, help="the application ELF file."
+        "--artefacts-location", required=True, help="the path to the application artefacts."
-    )
-    merge_subcommand.add_argument(
-        "--m4hex", required=True, help="the path to the Cortex-M4 HEX to merge."
     )
     merge_subcommand.add_argument(
         "--m0hex", help="the path to the Cortex-M0 HEX to merge."
@@ -375,10 +395,7 @@ def parse_args():
         "--cm4-img-id", help="the Cortex-M4 image ID."
     )
     sign_subcommand.add_argument(
-        "--elf", required=True, help="the application ELF file."
+        "--artefacts-location", required=True, help="the path to the application artefacts."
-    )
-    sign_subcommand.add_argument(
-        "--m4hex", required=True, help="the path to the Cortex-M4 HEX to merge."
     )
     sign_subcommand.add_argument(
         "--m0hex", help="the path to the Cortex-M0 HEX to merge."

targets/TARGET_Cypress/scripts/mbed_set_post_build_cypress.cmake

@@ -22,16 +22,14 @@ function(mbed_post_build_psoc6_merge_hex mbed_target_name)
         set(post_build_command
             COMMAND ${Python3_EXECUTABLE} ${MBED_PATH}/targets/TARGET_Cypress/scripts/PSOC6.py
                 merge
-                --elf $<TARGET_FILE:${APP_TARGET}>
+                --artefacts-location ${CMAKE_BINARY_DIR}
-                --m4hex ${CMAKE_BINARY_DIR}/${APP_TARGET}.hex
                 --m0hex ${cortex_m0_hex}
         )
     else()
         set(post_build_command
             COMMAND ${Python3_EXECUTABLE} ${MBED_PATH}/targets/TARGET_Cypress/scripts/PSOC6.py
                 merge
-                --elf $<TARGET_FILE:${APP_TARGET}>
+                --artefacts-location ${CMAKE_BINARY_DIR}
-                --m4hex ${CMAKE_BINARY_DIR}/${APP_TARGET}.hex
         )
     endif()
 
@@ -63,8 +61,7 @@ function(mbed_post_build_psoc6_sign_image
             --boot-scheme ${boot_scheme}
             --cm0-img-id ${cm0_img_id}
             --cm4-img-id ${cm4_img_id}
-            --elf $<TARGET_FILE:${APP_TARGET}>
+            --artefacts-location ${CMAKE_BINARY_DIR}
-            --m4hex ${CMAKE_BINARY_DIR}/${APP_TARGET}.hex
             --m0hex ${cortex_m0_hex}
     )
 

targets/TARGET_NXP/scripts/LPC.py

@@ -24,11 +24,17 @@ causes the checksum of the first 8 table entries to be 0. The boot loader code c
 the first 8 locations in sector 0 of the flash. If the result is 0, then execution control is
 transferred to the user code.
 """
+import pathlib
 import os
 import sys
 from struct import unpack, pack
 
 
+class ArtefactsError(Exception):
+    """An exception to indicate that the artefact(s) needed for processing 
+    ave not been found."""
+
+
 def patch(bin_path):
     with open(bin_path, 'r+b') as bin:
         # Read entries 0 through 6 (Little Endian 32bits words)
@@ -47,6 +53,14 @@ def is_patched(bin_path):
 
 
 if __name__ == "__main__":
-    binary = sys.argv[1]
+    artefacts_location = sys.argv[1]
+
+    try:
+        binary = list(pathlib.Path(artefacts_location).glob("*.bin"))[0]
+    except IndexError:
+        raise ArtefactsError(
+            f"Could not find binary file in {artefacts_location}"
+        )
+
     print("LPC Patch: %s" % os.path.split(binary)[1])
     patch(binary)

targets/TARGET_NXP/scripts/mbed_set_post_build_nxp.cmake

@@ -11,7 +11,7 @@ function(mbed_post_build_lpc_patch_vtable mbed_target_name)
 
     set(post_build_command
         COMMAND ${Python3_EXECUTABLE} ${MBED_PATH}/targets/TARGET_NXP/scripts/LPC.py
-        ${CMAKE_BINARY_DIR}/${APP_TARGET}.bin
+        ${CMAKE_BINARY_DIR}
     )
 
     mbed_set_post_build_operation()