[dpdk-dev] [PATCH] eal/windows: fix build warnings in MinGW

[Dmitry Kozlyuk]

Hi Tal,

2021-04-19 18:06 (UTC+0000), Tal Shnaiderman:
> I also noticed warnings in clang on my setup that are related to rte_os_shim.h:
> 
> [185/314] Compiling C object drivers/a715181@@tmp_rte_common_mlx5 at sta/common_mlx5_mlx5_common_mp.c.obj.
> In file included from ../drivers/common/mlx5/mlx5_common_mp.c:13:
> In file included from ..\drivers\common/mlx5/mlx5_common_utils.h:8:
> In file included from ..\drivers\common/mlx5/mlx5_common.h:17:
> ..\lib/librte_eal/windows/include\rte_os_shim.h:22:51: warning: token pasting of ',' and __VA_ARGS__ is a GNU extension [-Wgnu-zero-variadic-macro-arguments]
> #define open(path, flags, ...) _open(path, flags, ##__VA_ARGS__)
>                                                   ^
> However don't see it in CI, I'm using clang version 9.0.1

This warning only appears with --buildtype=debug, that's why I missed it.
I don't see a good way to fix it except #define open _open,
RTE_FMT_xxx approach is not applicable here.