Small Makefile tweaks

lurch · lurch · commit e7acdcbb180f · 2023-02-04T12:25:21.000Z
- some versions of macOS don't come with the `realpath` command - if no error was raised whilst building a target, `make` blindly continues following subsequent rules (see https://stackoverflow.com/q/55424550), regardless of whether the requested dependency was actually created! So raise an error if `make docs` doesn't actually create the expected directory (which happens if `doxygen` isn't installed)
diff --git a/Makefile b/Makefile
@@ -57,8 +57,9 @@ clean_submodules:
 
 # Create the pico-sdk Doxygen HTML files
 $(DOXYGEN_HTML_DIR): | $(ALL_SUBMODULE_CMAKELISTS) $(DOXYGEN_PICO_SDK_BUILD_DIR)
-	cmake -S $(PICO_SDK_DIR) -B $(DOXYGEN_PICO_SDK_BUILD_DIR) -DPICO_EXAMPLES_PATH=`realpath $(PICO_EXAMPLES_DIR)`
+	cmake -S $(PICO_SDK_DIR) -B $(DOXYGEN_PICO_SDK_BUILD_DIR) -DPICO_EXAMPLES_PATH=../$(PICO_EXAMPLES_DIR)
 	$(MAKE) -C $(DOXYGEN_PICO_SDK_BUILD_DIR) docs
+	test -d "$@"
 
 build_doxygen_html: | $(DOXYGEN_HTML_DIR)
 
