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Subject: RHEL 7 gcc 4.8.5 cannot ignore -Wdiscarded-qualifiers
Date: Fri, 7 Oct 2022 18:39:01 +0200
Message-ID: <98CBD80474FA8B44BF855DF32C47DC35D873B2@smartserver.smartshare.dk>
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Thread-Topic: RHEL 7 gcc 4.8.5 cannot ignore -Wdiscarded-qualifiers
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From: =?iso-8859-1?Q?Morten_Br=F8rup?= <mb@smartsharesystems.com>
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Anyone from Red Hat care to suggest a fix for the problem below, related =
to the ancient GCC (version 4.8.5) on RHEL 7?

I get this warning:
error: unknown option after '#pragma GCC diagnostic' kind =
[-Werror=3Dpragmas]

for source code containing:
#pragma GCC diagnostic ignored "-Wdiscarded-qualifiers"


Here's the link to the failing CI test: =
https://lab.dpdk.org/results/dashboard/patchsets/23818/#env-36

Here's the source code triggering the error:

/**
 * @internal
 * Workaround for _mm_stream_load_si128() missing const in the =
parameter.
 */
__rte_internal
static __rte_always_inline
__m128i _mm_stream_load_si128_const(const __m128i * const mem_addr)
{
#if defined(RTE_TOOLCHAIN_GCC)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wdiscarded-qualifiers"
#endif
	return _mm_stream_load_si128(mem_addr);
#if defined(RTE_TOOLCHAIN_GCC)
#pragma GCC diagnostic pop
#endif
}