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From: "Luca Barbato" <lu_zero@gentoo.org>
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Message-ID: <1720212549.2baeb8c8987f9214080ce2a8c94c0e93ee7af217.lu_zero@gentoo>
Subject: [gentoo-commits] repo/gentoo:master commit in: eclass/
X-VCS-Repository: repo/gentoo
X-VCS-Files: eclass/flag-o-matic.eclass
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X-VCS-Committer-Name: Luca Barbato
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Date: Fri,  5 Jul 2024 20:50:13 +0000 (UTC)
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commit:     2baeb8c8987f9214080ce2a8c94c0e93ee7af217
Author:     Luca Barbato <lu_zero <AT> gentoo <DOT> org>
AuthorDate: Fri Jul  5 09:31:57 2024 +0000
Commit:     Luca Barbato <lu_zero <AT> gentoo <DOT> org>
CommitDate: Fri Jul  5 20:49:09 2024 +0000
URL:        https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=2baeb8c8

flag-o-matic.eclass: allow -mstrict-align and -mvector-strict-align

It is needed to make sure vector unaligned load/store aren't inserted
when the riscv cpu does not allow them.

See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115789

Signed-off-by: Luca Barbato <lu_zero <AT> gentoo.org>

 eclass/flag-o-matic.eclass | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/eclass/flag-o-matic.eclass b/eclass/flag-o-matic.eclass
index ecac452aa0ef..c6b1ad80e12e 100644
--- a/eclass/flag-o-matic.eclass
+++ b/eclass/flag-o-matic.eclass
@@ -129,6 +129,10 @@ _setup-allowed-flags() {
 		# needed for arm64 (and in particular SCS)
 		-ffixed-x18
 
+		# needed for riscv (to prevent unaligned vector access)
+		# See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115789
+		-mstrict-align -mvector-strict-align
+
 		# gcc 4.5
 		-mno-fma4 -mno-movbe -mno-xop -mno-lwp
 		# gcc 4.6