Exported per_lcore__rte_errno function to compile ring for windows.

compilation error logs:
librte_ring_rte_ring.c.obj : error LNK2019: unresolved
external symbol per_lcore__rte_errno referenced in
function rte_ring_lookup

The cause was that per_lcore__rte_errno function wasn't included
in the export list.
To solve this per_lcore__rte_errno was added to the Windows export
list.

Signed-off-by: Fady Bader <f...@mellanox.com>
---
Depends-on: series-9374 ("Windows basic memory management")

v4: rebase on "Windows basic memory management" v5.

v3: Fix style issues.

v2: Fix style issues.
---
 lib/librte_eal/rte_eal_exports.def | 1 +
 lib/librte_eal/rte_eal_version.map | 1 +
 lib/meson.build                    | 6 +++++-
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/librte_eal/rte_eal_exports.def 
b/lib/librte_eal/rte_eal_exports.def
index 854b83bcd..cbb6b8cfe 100644
--- a/lib/librte_eal/rte_eal_exports.def
+++ b/lib/librte_eal/rte_eal_exports.def
@@ -1,5 +1,6 @@
 EXPORTS
        __rte_panic
+       per_lcore__rte_errno
        rte_calloc
        rte_calloc_socket
        rte_eal_get_configuration
diff --git a/lib/librte_eal/rte_eal_version.map 
b/lib/librte_eal/rte_eal_version.map
index dff51b13d..8937bdfea 100644
--- a/lib/librte_eal/rte_eal_version.map
+++ b/lib/librte_eal/rte_eal_version.map
@@ -392,4 +392,5 @@ EXPERIMENTAL {
        rte_mem_lock;
        rte_mem_map;
        rte_mem_unmap;
+       __emutls_v.per_lcore__rte_errno;
 };
diff --git a/lib/meson.build b/lib/meson.build
index d190d84ef..30ed9e05e 100644
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -36,7 +36,11 @@ libraries = [
        'flow_classify', 'bpf', 'graph', 'node']
 
 if is_windows
-       libraries = ['kvargs','eal'] # only supported libraries for windows
+       libraries = [
+               'kvargs',
+               'eal',
+               'ring'
+               ] # only supported libraries for windows
 endif
 
 default_cflags = machine_args
-- 
2.16.1.windows.4

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