`--parallel` improvements (#13800)

* improve make parallel jobs support

* document the --parallel option

* disable the output-sync for interactive targets

1 files changed, 5 insertions, 5 deletions

diff --git a/platforms/chibios/flash.mk b/platforms/chibios/flash.mk
index 46aff6e4b..c0b32c2f2 100644
--- a/platforms/chibios/flash.mk
+++ b/platforms/chibios/flash.mk
@@ -73,15 +73,15 @@ teensy: $(BUILD_DIR)/$(TARGET).hex cpfirmware sizeafter
 
 flash: $(BUILD_DIR)/$(TARGET).bin cpfirmware sizeafter
 ifneq ($(strip $(PROGRAM_CMD)),)
-        $(PROGRAM_CMD)
+        $(UNSYNC_OUTPUT_CMD) && $(PROGRAM_CMD)
 else ifeq ($(strip $(BOOTLOADER)),kiibohd)
-        $(call EXEC_DFU_UTIL)
+        $(UNSYNC_OUTPUT_CMD) && $(call EXEC_DFU_UTIL)
 else ifeq ($(strip $(MCU_FAMILY)),KINETIS)
-        $(call EXEC_TEENSY)
+        $(UNSYNC_OUTPUT_CMD) && $(call EXEC_TEENSY)
 else ifeq ($(strip $(MCU_FAMILY)),MIMXRT1062)
-        $(call EXEC_TEENSY)
+        $(UNSYNC_OUTPUT_CMD) && $(call EXEC_TEENSY)
 else ifeq ($(strip $(MCU_FAMILY)),STM32)
-        $(call EXEC_DFU_UTIL)
+        $(UNSYNC_OUTPUT_CMD) && $(call EXEC_DFU_UTIL)
 else
         $(PRINT_OK); $(SILENT) || printf "$(MSG_FLASH_BOOTLOADER)"
 endif