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authorKito Cheng <kito.cheng@sifive.com>2022-04-11 23:02:59 +0800
committerKito Cheng <kito.cheng@sifive.com>2022-04-11 23:07:36 +0800
commit44fedc5e1a8f202248fc0f2b39c84226d8f3d1e6 (patch)
treece1070502841bb53cd8f6712fdd785fece1fb9c7 /README.md
parentcc1075c916491ac5bd6cae419f6ca371a268b10d (diff)
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Add --with-isa-spec option to configure
Set the default version to 2.2 for now, and once we bump to GCC 12 we will bump that to 20191213.
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@@ -126,6 +126,17 @@ devtoolset-7 works.
There are a number of additional options that may be passed to
configure. See './configure --help' for more details.
+#### Set default ISA spec version
+
+`--with-isa-spec=` can specify the default version of the RISC-V Unprivileged
+(formerly User-Level) ISA specification.
+
+Possible options are: `2.2`, `20190608` and `20191213`.
+
+The default version is `2.2`.
+
+More details about this option you can refer this post [RISC-V GNU toolchain bumping default ISA spec to 20191213](https://groups.google.com/a/groups.riscv.org/g/sw-dev/c/aE1ZeHHCYf4).
+
#### Build with customized multi-lib configure.
`--with-multilib-generator=` can specify what multilibs to build. The argument