From: Tyler Retzlaff <roretzla@linux.microsoft.com>
To: bugzilla@dpdk.org
Cc: dev@dpdk.org
Subject: Re: [DPDK/core Bug 1425] enable_stdatomic=true breaks C++ on GCC 11 and earlier
Date: Mon, 29 Apr 2024 16:14:58 -0700 [thread overview]
Message-ID: <20240429231458.GB17852@linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net> (raw)
In-Reply-To: <bug-1425-3@http.bugs.dpdk.org/>
On Mon, Apr 29, 2024 at 06:21:13AM +0000, bugzilla@dpdk.org wrote:
> https://bugs.dpdk.org/show_bug.cgi?id=1425
>
> Bug ID: 1425
> Summary: enable_stdatomic=true breaks C++ on GCC 11 and
> earlier
> Product: DPDK
> Version: 23.11
> Hardware: All
> OS: Linux
> Status: UNCONFIRMED
> Severity: normal
> Priority: Normal
> Component: core
> Assignee: dev@dpdk.org
> Reporter: mattias.ronnblom@ericsson.com
> Target Milestone: ---
>
> On GCC 11 and earlier, configuring enable_stdatomic=true prevents the use of
> all DPDK header files that directly or indirectly include <rte_stdatomic.h>
> from a C++ translation unit (e.g., app).
>
> <rte_stdatomic.h> includes <stdatomic.h>, which in turn is not necessarily
> C++-compatible.
This is known but to add some information.
C++ and enable_stdatomic=true for llvm and gcc are not currently
supported. the combination will remain unsupported for C++ compilers
that do not support -std=c++23 which is the first C++ standard that
requires interoperability with C11 stdatomic.h
When enable_stdatomic=true there are bugs/incorrect usages of atomic
qualifier in casts that (even when using C++23) cause compilation
failure. These are a fixable but are low priority without -std=c++23.
Finally, the legacy atomics remain unconverted to stdatomic. This will
cause enable_stdatomic=true not to build when using llvm (but not gcc)
because llvm strictly enforces qualification when using atomic generics.
>
> --
> You are receiving this mail because:
> You are the assignee for the bug.
next prev parent reply other threads:[~2024-04-29 23:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-29 6:21 [DPDK/core Bug 1425] enable_stdatomic=true breaks C++ on GCC 11 and earlier bugzilla
2024-04-29 23:14 ` Tyler Retzlaff [this message]
2024-04-30 20:06 ` Mattias Rönnblom
2024-04-30 20:37 ` Tyler Retzlaff
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