[RFC 10/10] eal: deprecate weak symbols

[David Marchand <david.marchand@redhat.com>]

Mark __rte_weak as deprecated.
It will avoid having to support such feature with other linkers,
plus this was never really needed.

Signed-off-by: David Marchand <david.marchand@redhat.com>
---
 doc/guides/rel_notes/release_25_03.rst | 2 ++
 lib/eal/include/rte_common.h           | 6 +++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/doc/guides/rel_notes/release_25_03.rst b/doc/guides/rel_notes/release_25_03.rst
index 269ab6f68a..e9a9abbb13 100644
--- a/doc/guides/rel_notes/release_25_03.rst
+++ b/doc/guides/rel_notes/release_25_03.rst
@@ -125,6 +125,8 @@ API Changes
 * eal: The ``__rte_packed`` macro for packing data is replaced with
   ``__rte_packed_begin`` / ``__rte_packed_end``.
 
+* eal: The ``__rte_weak`` macro is deprecated and will be removed in a future release.
+
 * build: The Intel networking drivers:
   cpfl, e1000, fm10k, i40e, iavf, ice, idpf, igc, ipn3ke and ixgbe,
   have been moved from ``drivers/net`` to a new ``drivers/net/intel`` directory.
diff --git a/lib/eal/include/rte_common.h b/lib/eal/include/rte_common.h
index 7a252c1997..2e0ee9dc7e 100644
--- a/lib/eal/include/rte_common.h
+++ b/lib/eal/include/rte_common.h
@@ -181,7 +181,11 @@ typedef uint16_t unaligned_uint16_t;
 /**
  * Mark a function or variable to a weak reference.
  */
-#define __rte_weak __attribute__((__weak__))
+#ifdef RTE_TOOLCHAIN_MSVC
+#define __rte_weak RTE_DEPRECATED(__rte_weak)
+#else
+#define __rte_weak RTE_DEPRECATED(__rte_weak) __attribute__((__weak__))
+#endif
 
 /**
  * Mark a function to be pure.
-- 
2.48.1