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Copy file name to clipboardExpand all lines: README.md
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There are a number of additional options that may be passed to
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configure. See './configure --help' for more details.
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#### Set default ISA spec version
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`--with-isa-spec=` can specify the default version of the RISC-V Unprivileged
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(formerly User-Level) ISA specification.
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Possible options are: `2.2`, `20190608` and `20191213`.
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The default version is `2.2`.
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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).
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#### Build with customized multi-lib configure.
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`--with-multilib-generator=` can specify what multilibs to build. The argument
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