From: Waldemar Brodkorb <wbx@openadk.org>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH] toolchain-wrapper: do not use deprecated -mfused-madd
Date: Fri, 11 Aug 2017 19:32:46 +0200 [thread overview]
Message-ID: <20170811173246.GL28021@waldemar-brodkorb.de> (raw)
In-Reply-To: <20170811080858.336ba4d3@windsurf>
Hi,
Thomas Petazzoni wrote,
> Hello,
>
> On Fri, 11 Aug 2017 07:28:48 +0200, Waldemar Brodkorb wrote:
> > GCC deprecated -mfused-madd, -ffp-contract=off should
> > be used for Xburst workaround.
> > uClibc compilations will fail, because a gcc warning
> > is emitted while checking for TLS support in the compiler.
>
> In which gcc version was -ffp-contract=off added ? Can we use that
> unconditionally, or is it only available in recent gcc versions ?
It was added in commit b9be572eda05cd23bbabd6409387d2c7ac782715.
Not sure how to find when it was added in a release.
4.6.4 seems to have it:
https://gcc.gnu.org/onlinedocs/gcc-4.6.4/gcc/Optimize-Options.html#index-ffp_002dcontract-691
I don't find it in earlier release docs.
best regards
Waldemar
next prev parent reply other threads:[~2017-08-11 17:32 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-11 5:28 [Buildroot] [PATCH] toolchain-wrapper: do not use deprecated -mfused-madd Waldemar Brodkorb
2017-08-11 6:08 ` Thomas Petazzoni
2017-08-11 9:53 ` Arnout Vandecappelle
2017-08-11 18:11 ` Waldemar Brodkorb
2017-08-11 20:54 ` Arnout Vandecappelle
2017-08-11 17:32 ` Waldemar Brodkorb [this message]
2017-08-11 21:00 ` Arnout Vandecappelle
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