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toolchain: gcc: backport inline subword atomic support for riscv

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RISC-V has no support for subword atomic operations; code currently
generates libatomic library calls.

This patch changes the default behavior to fast inline subword atomic
calls that do not require libatomic.

Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>
This commit is contained in:
Tianling Shen
2023-06-10 19:08:04 +08:00
committed by Hauke Mehrtens
parent 3baa45fbd8
commit 7b4a966de8
9 changed files with 6174 additions and 3 deletions
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toolchain/gcc/patches-12.x/910-mbsd_multi.patch
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@@ -114,7 +114,7 @@ Date: Tue Jul 31 00:52:27 2007 +0000
; On SVR4 targets, it also controls whether or not to emit a
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -9596,6 +9596,17 @@ This option is only supported for C and
@@ -9597,6 +9597,17 @@ This option is only supported for C and
@option{-Wall} and by @option{-Wpedantic}, which can be disabled with
@option{-Wno-pointer-sign}.