fix(makefile): build before submodules but not trigger rebuild

Author: Daniele Briggi

Makefile

@@ -165,17 +165,17 @@ test: $(TARGET)
 	$(SQLITE3) ":memory:" -cmd ".bail on" ".load ./dist/ai" "SELECT ai_version();"
 
 # Build submodules (only after successful compilation)
-build/llama.cpp.stamp: compile
+build/llama.cpp.stamp: | compile
 	cmake -B $(BUILD_LLAMA) $(LLAMA_OPTIONS) $(LLAMA_DIR)
 	cmake --build $(BUILD_LLAMA) --config Release -- -j$(CPUS)
 	touch $@
 
-build/whisper.cpp.stamp: compile
+build/whisper.cpp.stamp: | compile
 	cmake -B $(BUILD_WHISPER) $(WHISPER_OPTIONS) $(WHISPER_DIR)
 	cmake --build $(BUILD_WHISPER) --config Release -- -j$(CPUS)
 	touch $@
 
-build/miniaudio.stamp: compile
+build/miniaudio.stamp: | compile
 	cmake -B $(BUILD_MINIAUDIO) -DMINIAUDIO_BUILD_EXAMPLES=OFF -DMINIAUDIO_BUILD_TESTS=OFF $(MINIAUDIO_DIR)
 	cmake --build $(BUILD_MINIAUDIO) --config Release -- -j$(CPUS)
 	touch $@