Fix DTB not being built for SYSTEM on macOS-arm64

The DTB dependency was inside the 'ifeq CC_IS_EMCC' block, which meant
it was only added when building with emcc. However, mk/system.mk uses
'deps_emcc' for device object files regardless of the compiler.

The fix moves the DTB dependency setup outside the CC_IS_EMCC block
so it is always added when SYSTEM=1 and ELF_LOADER=0, regardless of
the compiler being used.

Author: jserv

mk/wasm.mk

@@ -65,21 +65,6 @@ $(OUT)/elf_list.js: artifact tools/gen-elf-list-js.py
 # used to download all dependencies of elf executable and bundle into single wasm
 deps_emcc += artifact $(OUT)/elf_list.js $(DOOM_DATA) $(QUAKE_DATA) $(TIMIDITY_DATA)
 
-# For SYSTEM mode, emscripten needs the DTB file to embed
-# DTB is only built when SYSTEM=1 and ELF_LOADER=0
-ifeq ($(call has, SYSTEM), 1)
-ifeq ($(call has, ELF_LOADER), 0)
-# Add DTB as dependency for compilation stages
-deps_emcc += $(BUILD_DTB) $(BUILD_DTB2C)
-
-# For linking stage: ensure DTB exists before emcc embeds it
-# Make BIN directly depend on DTB files as regular prerequisites
-# This will cause them to be built, but they'll also be passed to the linker
-# We need to filter them out in the linker command
-$(BIN): $(BUILD_DTB) $(BUILD_DTB2C)
-endif
-endif
-
 # check browser version if supports TCO
 CHROME_MAJOR :=
 CHROME_MAJOR_VERSION_CHECK_CMD :=
@@ -181,3 +166,21 @@ start-web: $(start_web_deps)
 .PHONY: check-demo-dir-exist start-web
 
 endif
+
+# For SYSTEM mode, DTB needs to be built regardless of whether we're using emcc
+# DTB is only built when SYSTEM=1 and ELF_LOADER=0
+ifeq ($(call has, SYSTEM), 1)
+ifeq ($(call has, ELF_LOADER), 0)
+# Add DTB as dependency for compilation stages
+# This is used by mk/system.mk for device object files
+deps_emcc += $(BUILD_DTB) $(BUILD_DTB2C)
+
+# For emcc builds: ensure DTB exists before emcc embeds it
+# Make BIN directly depend on DTB files as regular prerequisites
+# This will cause them to be built, but they'll also be passed to the linker
+# We need to filter them out in the linker command
+ifeq ("$(CC_IS_EMCC)", "1")
+$(BIN): $(BUILD_DTB) $(BUILD_DTB2C)
+endif
+endif
+endif