Gentoo Archives: gentoo-dev

From: Joshua Kinard <kumba@g.o>
To: gentoo-dev@l.g.o
Subject: [gentoo-dev] [PATCH] flag-o-matic.eclass: add some missing MIPS CPU errata options to ALLOWED_FLAGS
Date: Sat, 28 Mar 2020 19:17:19
Message-Id: ea75d355-20a6-e457-62ce-4d498ddc9263@gentoo.org
1 Noticed during a glibc build for MIPS-III ISA that the -mfix-r4000
2 and -mfix-r4400 gcc flags got stripped off. These are needed to work
3 around known CPU errata in R4000 and R4400 CPUs. In addition, also
4 add the -mfix-rm7000 option (and it's -mno form) to fix errata in the
5 PMC RM7000 CPU, and the -mr10k-cache-barrier to control the generation
6 of cache barriers to work around the side-effects of R10000's
7 speculative execution capabilities.
8
9 Signed-off-by: Joshua Kinard <kumba@g.o>
10 ---
11 eclass/flag-o-matic.eclass | 4 +++-
12 1 file changed, 3 insertions(+), 1 deletion(-)
13
14 diff --git a/eclass/flag-o-matic.eclass b/eclass/flag-o-matic.eclass
15 index e76eef293e..0c67ec9f7a 100644
16 --- a/eclass/flag-o-matic.eclass
17 +++ b/eclass/flag-o-matic.eclass
18 @@ -56,7 +56,9 @@ setup-allowed-flags() {
19 -mno-faster-structs -mfaster-structs -m32 -m64 -mx32 -mabi
20 -mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 -mcmodel
21 -mstack-bias -mno-stack-bias -msecure-plt '-m*-toc' -mfloat-abi
22 - -mfix-r10000 -mno-fix-r10000 -mthumb -marm
23 + -mfix-r4000 -mno-fix-r4000 -mfix-r4400 -mno-fix-r4400
24 + -mfix-rm7000 -mno-fix-rm7000 -mfix-r10000 -mno-fix-r10000
25 + -mr10k-cache-barrier -mthumb -marm
26
27 # gcc 4.5
28 -mno-fma4 -mno-movbe -mno-xop -mno-lwp

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