feat: port gcc to MontaukOS

programs/GNUmakefile

@@ -424,10 +424,18 @@ ifneq ($(wildcard ../toolchain/native-gcc/sdk/bin/gcc),)
 	mkdir -p $(BINDIR)/tmp
 	printf 'scratch space for compiler intermediates\n' > $(BINDIR)/tmp/readme.txt
 else
-	@echo "devkit: toolchain/native-gcc/ not built; skipping native GCC"
+	@echo "======================================================================"
+	@echo "devkit: WARNING: toolchain/native-gcc/ not built."
+	@echo "  The image will ship WITHOUT the native GCC (g++, cc1plus, ...)."
+	@echo "  Run 'make sdk' from the repo root to build the full Montauk SDK."
+	@echo "======================================================================"
 endif
 else
-	@echo "devkit: toolchain/native/ not built; skipping native dev tools"
+	@echo "======================================================================"
+	@echo "devkit: WARNING: toolchain/native/ not built."
+	@echo "  The image will ship WITHOUT the Montauk SDK (0:/sdk dev tools)."
+	@echo "  Run 'make sdk' from the repo root to build it (one-time, long)."
+	@echo "======================================================================"
 endif
 
 clean: