[PATCH v2 0/5] mbuf: enable to be compiled with MSVC

[Andre Muezerie <andremue@linux.microsoft.com>]

When compiling with MSVC the error below shows up due to function
versioning:

../lib/net/rte_net_crc.c(418): error C2061: syntax error:
    identifier '__attribute__'

MSVC allows alias function names to be exported, but the mechanism is
different than the one used by gcc. It was considered to enhance the logic
in the existing version.map files but that file is also passed to other
tools on Linux, making this challenging. A simpler approach is to have an
optional version.map file to be used only when Microsoft's linker is to be
used. This optional map file is only necessary for libraries that have
versioned code.

v2:
- updated versioning macros so that the latest mbuf/net code can compile
  with MSVC. V1 did not have these changes because by the time that series
  was sent out the versioning problem had not surfaced yet.
- for testing purposes, dpdk-test was build with msvc and crc_autotest
  was run successfully. This test is known to call the versioned function
  which raised the issue.

Andre Muezerie (5):
  doc: update guide on versioning macros
  buildtools: update map_to_win.py to use optional map file
  eal: update versioning macros
  net: update use of versioning macros
  mbuf: enable to be compiled with MSVC

 buildtools/map_to_win.py                   | 16 ++++++++++++++-
 doc/guides/contributing/abi_versioning.rst |  6 ++++++
 lib/eal/include/rte_function_versioning.h  | 19 ++++++++++++++++++
 lib/mbuf/meson.build                       |  6 ------
 lib/net/rte_net_crc.c                      |  2 ++
 lib/net/version_ms_linker.map              | 23 ++++++++++++++++++++++
 6 files changed, 65 insertions(+), 7 deletions(-)
 create mode 100644 lib/net/version_ms_linker.map

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2.48.1.vfs.0.0