add empty RTE_EAL_PMD_PATH dir to librte_eal

If EAL is initialized and the path isn't existing at all (=no PMDs at
all are installed) the initialization fails with:
 EAL: /usr/lib/x86_64-linux-gnu/dpdk-pmds/: cannot open shared object
 file: No such file or directory
So since we support RTE_EAL_PMD_PATH now but can never guarantee that
there always will be a PMD it becomes a requirement of librte_eal to
have at least an empty path.
An empty path is fine and will not load anything, but avoid the
initializaiton error.

Change-Id: I2725169c67c190f8ed8b608fc5ae508ae66eab1c
Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>

diff --git a/debian/rules b/debian/rules
index e468492..ccd6140 100755 (executable)
--- a/debian/rules
+++ b/debian/rules
@@ -217,6 +217,9 @@ override_dh_auto_install-arch:
            echo "PMD: linking $${LIBF} into RTE_EAL_PMD_PATH at $${LIBD}/dpdk-pmds/"; \
            ln -s --relative --target-directory=$${LIBD}/dpdk-pmds/ $${LIBD}/$${LIBF}; \
          fi; \
+         if [ "$${LIBF#librte_eal}x" != "$${LIBF}x" ]; then \
+           mkdir -p $${LIBD}/dpdk-pmds; \
+         fi; \
        done
        # pkg-config
        mkdir -p debian/libdpdk-dev/$(LIBDIR)/pkgconfig