> Subject: Re: [dpdk-ci] [PATCH] eal/windows: fix build warnings in MinGW > > External email: Use caution opening links or attachments > > > 2021-04-19 15:29 (UTC-0400), Aaron Conole: > > Thomas Monjalon <tho...@monjalon.net> writes: > > > > > 19/04/2021 20:06, Tal Shnaiderman: > > >> > > 2021-04-18 19:04 (UTC+0000), Tal Shnaiderman: > > >> > > > > 18/04/2021 19:08, Tal Shnaiderman: > > >> > > > > > the strncasecmp marco defined in rte_os_shim.h is already > > >> > > > > > defined in MinGW-w64, as a result the compiler prints out > > >> > > > > > the warning below on function redefinition whenever > > >> > > > > > compiling a file including the > > >> > > header. > > >> > > > > > > > >> > > > > > ..\lib/librte_eal/windows/include/rte_os_shim.h:21: > > >> > > > > > warning: "strncasecmp" redefined #define strncasecmp(s1, > > >> > > > > > s2, > > >> > > > > > count) _strnicmp(s1, s2, count) > > >> > > > > > > >> > > > > Why the tests are passing? Are we allowing warnings in build > test? > > >> > > > > > >> > > > It's a good question, I see CI is passing without warnings, > > >> > > > Dmitry can you > > >> > > reproduce it? > > >> > > > > > >> > > > On my side the collision is with the following file: > > >> > > > > > >> > > > C:/mingw-w64/x86_64/mingw64/x86_64-w64- > > >> > > mingw32/include/string.h:119: > > >> > > > note: this is the location of the previous definition > > >> > > > #define strncasecmp _strnicmp > > >> > > > > > >> > > > I'm using: > > >> > > > -gcc (x86_64-win32-seh-rev0, Built by MinGW-W64 project) > > >> > > > 8.1.0 -meson > > >> > > > 0.53.2 > > >> > > > > >> > > I can't reproduce it using the same versions. > > >> > > Do you invoke meson with other options than "-Dexamples=..."? > > >> > > > >> > This is the meson line I'm using: > > >> > > > >> > meson "-Dexamples=helloworld" build --wipe > > >> > --default-library=static -- buildtype debug > > >> > > > >> > The problem however is that MinGW's string.h defines the macro in > > >> > line 119, for some reason my build includes it and the rest doesn't. > > >> > > >> Hi Dmitry, > > >> > > >> 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@sta/common_mlx5_mlx5_co > mmon_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 > > > > > > It seems we should improve our CI. > > > Please open suggestions in the CI bugzilla. > > > > Please do. > > > > Will this only be caught by mingw64 on windows? Will we get the same > > issues with a linux mingw install? I'm guessing yes, but don't know > > mingw very well. We may be able to install the mingw package under > > our github actions pipeline. > > Yes, Linux MinGW-w64 produces the same warning (about strncasecmp). > __VA_ARGS__ warning won't show up with GNU compiler, obviously. > It may with ICC, but I don't have it to check. > > I figured out it's not --default-library=static, but --buildtype=debug that > caues the arning to appear, my mistake in previous message.
Right, using --buildtype=release doesn't reproduce the error. BTW, how does release build passes if I excluded the definition from RTE_TOOLCHAIN_GCC?
