Improve support for hand-written asm source files in PIO

Closes: espressif/arduino-esp32#6817
Co-Authored-By: Ivan Kravets <[email protected]>

Author: me-no-dev

CMakeLists.txt

@@ -11,7 +11,7 @@ idf_build_get_property(elf EXECUTABLE GENERATOR_EXPRESSION)
 
 add_custom_command(
 	OUTPUT "idf_libs" 
-	COMMAND ${CMAKE_SOURCE_DIR}/tools/copy-libs.sh ${IDF_TARGET} "${CONFIG_ESPTOOLPY_OCT_FLASH}" "${CONFIG_SPIRAM_MODE_OCT}"
+	COMMAND ${CMAKE_SOURCE_DIR}/tools/copy-libs.sh ${IDF_TARGET} "${CONFIG_ESPTOOLPY_OCT_FLASH}" "${CONFIG_SPIRAM_MODE_OCT}" "${CONFIG_IDF_TARGET_ARCH_XTENSA}"
 	DEPENDS ${elf} 
 	WORKING_DIRECTORY ${CMAKE_SOURCE_DIR} 
 	VERBATIM

tools/copy-libs.sh

@@ -2,6 +2,7 @@
 # config
 
 IDF_TARGET=$1
+IS_XTENSA=$4
 OCT_FLASH=
 OCT_PSRAM=
 if [ "$2" = "y" ]; then
@@ -281,6 +282,15 @@ cat pio_start.txt > "$AR_PLATFORMIO_PY"
 rm pio_end.txt 1pio_start.txt pio_start.txt
 
 echo "    ASFLAGS=[" >> "$AR_PLATFORMIO_PY"
+if [ "$IS_XTENSA" = "y" ]; then
+	echo "        \"-mlongcalls\"" >> "$AR_PLATFORMIO_PY"
+else
+	echo "        \"-march=rv32imc\"" >> "$AR_PLATFORMIO_PY"
+fi
+echo "    ]," >> "$AR_PLATFORMIO_PY"
+echo "" >> "$AR_PLATFORMIO_PY"
+
+echo "    ASPPFLAGS=[" >> "$AR_PLATFORMIO_PY"
 set -- $PIO_AS_FLAGS
 for item; do
 	echo "        \"$item\"," >> "$AR_PLATFORMIO_PY"