mk: build examples list before each doxygen run

The file examples.dox was not re-generated when a file
is added or removed from examples/.
It is now removed on clean operation.
The ordering of operations (clean before generation) is also
better defined.

Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>

diff --git a/mk/rte.sdkdoc.mk b/mk/rte.sdkdoc.mk
index 39c67a9..fb8f915 100644 (file)
--- a/mk/rte.sdkdoc.mk
+++ b/mk/rte.sdkdoc.mk
@@ -68,7 +68,7 @@ all: api-html guides-html guides-pdf
 clean: api-html-clean guides-html-clean guides-pdf-clean guides-man-clean
 
 .PHONY: api-html
-api-html: api-html-clean $(API_EXAMPLES)
+api-html: $(API_EXAMPLES)
        @echo 'doxygen for API...'
        $(Q)mkdir -p $(RTE_OUTPUT)/doc/html
        $(Q)(cat $(RTE_SDK)/doc/api/doxy-api.conf     && \
@@ -85,11 +85,12 @@ api-html: api-html-clean $(API_EXAMPLES)
 
 .PHONY: api-html-clean
 api-html-clean:
+       $(Q)rm -f $(API_EXAMPLES)
        $(Q)rm -f $(RTE_OUTPUT)/doc/html/api/*
        $(Q)rmdir -p --ignore-fail-on-non-empty $(RTE_OUTPUT)/doc/html/api 2>&- || true
 
-$(API_EXAMPLES):
-       $(Q)mkdir -p $(RTE_OUTPUT)/doc/html
+$(API_EXAMPLES): api-html-clean
+       $(Q)mkdir -p $(@D)
        @printf '/**\n' > $(API_EXAMPLES)
        @printf '@page examples DPDK Example Programs\n\n' >> $(API_EXAMPLES)
        @find examples -type f -name '*.c' -printf '@example %p\n' >> $(API_EXAMPLES)