Fixing incorrect keymap build when switching between multiple keymap.jsons (#12632)

build_json.mk

@@ -1,22 +1,22 @@
 # Look for a json keymap file
 ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_5)/keymap.json)","")
-    KEYMAP_C := $(KEYBOARD_OUTPUT)/src/keymap.c
+    KEYMAP_C := $(KEYMAP_OUTPUT)/keymap.c
     KEYMAP_JSON := $(MAIN_KEYMAP_PATH_5)/keymap.json
     KEYMAP_PATH := $(MAIN_KEYMAP_PATH_5)
 else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_4)/keymap.json)","")
-    KEYMAP_C := $(KEYBOARD_OUTPUT)/src/keymap.c
+    KEYMAP_C := $(KEYMAP_OUTPUT)/keymap.c
     KEYMAP_JSON := $(MAIN_KEYMAP_PATH_4)/keymap.json
     KEYMAP_PATH := $(MAIN_KEYMAP_PATH_4)
 else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_3)/keymap.json)","")
-    KEYMAP_C := $(KEYBOARD_OUTPUT)/src/keymap.c
+    KEYMAP_C := $(KEYMAP_OUTPUT)/keymap.c
     KEYMAP_JSON := $(MAIN_KEYMAP_PATH_3)/keymap.json
     KEYMAP_PATH := $(MAIN_KEYMAP_PATH_3)
 else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_2)/keymap.json)","")
-    KEYMAP_C := $(KEYBOARD_OUTPUT)/src/keymap.c
+    KEYMAP_C := $(KEYMAP_OUTPUT)/keymap.c
     KEYMAP_JSON := $(MAIN_KEYMAP_PATH_2)/keymap.json
     KEYMAP_PATH := $(MAIN_KEYMAP_PATH_2)
 else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_1)/keymap.json)","")
-    KEYMAP_C := $(KEYBOARD_OUTPUT)/src/keymap.c
+    KEYMAP_C := $(KEYMAP_OUTPUT)/keymap.c
     KEYMAP_JSON := $(MAIN_KEYMAP_PATH_1)/keymap.json
     KEYMAP_PATH := $(MAIN_KEYMAP_PATH_1)
 endif
@@ -27,5 +27,5 @@ ifneq ("$(wildcard $(KEYMAP_PATH))", "")
 endif
 
 # Generate the keymap.c
-$(KEYBOARD_OUTPUT)/src/keymap.c: $(KEYMAP_JSON)
+$(KEYMAP_C): $(KEYMAP_JSON)
 	$(QMK_BIN) json2c --quiet --output $(KEYMAP_C) $(KEYMAP_JSON)

build_keyboard.mk

@@ -103,6 +103,15 @@ MAIN_KEYMAP_PATH_5 := $(KEYBOARD_PATH_5)/keymaps/$(KEYMAP)
 INFO_RULES_MK = $(shell $(QMK_BIN) generate-rules-mk --quiet --escape --keyboard $(KEYBOARD) --output $(KEYBOARD_OUTPUT)/src/rules.mk)
 include $(INFO_RULES_MK)
 
+ifneq ($(FORCE_LAYOUT),)
+    TARGET := $(TARGET)_$(FORCE_LAYOUT)
+endif
+
+# Object files and generated keymap directory
+#     To put object files in current directory, use a dot (.), do NOT make
+#     this an empty or blank macro!
+KEYMAP_OUTPUT := $(BUILD_DIR)/obj_$(TARGET)
+
 # Check for keymap.json first, so we can regenerate keymap.c
 include build_json.mk
 
@@ -145,10 +154,6 @@ ifeq ($(strip $(CONVERT_TO_PROTON_C)), yes)
     include platforms/chibios/QMK_PROTON_C/convert_to_proton_c.mk
 endif
 
-ifneq ($(FORCE_LAYOUT),)
-    TARGET := $(TARGET)_$(FORCE_LAYOUT)
-endif
-
 include quantum/mcu_selection.mk
 
 # Find all the C source files to be compiled in subfolders.
@@ -327,11 +332,6 @@ endif
 # Disable features that a keyboard doesn't support
 -include disable_features.mk
 
-# Object files directory
-#     To put object files in current directory, use a dot (.), do NOT make
-#     this an empty or blank macro!
-KEYMAP_OUTPUT := $(BUILD_DIR)/obj_$(TARGET)
-
 ifneq ("$(wildcard $(KEYMAP_PATH)/config.h)","")
     CONFIG_H += $(KEYMAP_PATH)/config.h
 endif