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Re: GCC changes for Fedora + riscv64
- From: Jeff Law <law at redhat dot com>
- To: Andreas Schwab <schwab at suse dot de>, Kito Cheng <kito dot cheng at gmail dot com>
- Cc: Stef O'Rear <sorear2 at gmail dot com>, Jim Wilson <jimw at sifive dot com>, "Richard W.M. Jones" <rjones at redhat dot com>, GCC <gcc at gcc dot gnu dot org>, David Abdurachmanov <david dot abdurachmanov at gmail dot com>
- Date: Tue, 10 Apr 2018 07:42:18 -0600
- Subject: Re: GCC changes for Fedora + riscv64
- Autocrypt: addr=law at redhat dot com; prefer-encrypt=mutual; keydata= xsBNBFkbIO8BCACVIqDhDVh9ur8C+zNV1J/cXfwvVDAUcphDEFl4jyHqZORK4Pd3Db8oWqLm Q8lOCr/VOS7lrCtdpVMQkLGOGA16oJ8g7hzhnojpjY09UjsoUiG7oKacuxj8skfp6SIx93Zl +iNYPRa4S+za6nY8qiVjyUuiyX04ZPZMrKp2c2sGi+HnBKUZXGhrz/Jdzdox3tjajWZnObyy nhEN6hn9L3KawTtGPE/R6A/1RhHTD9FQmIWIeucpaY5c6GNKXTFpj2VYx57LY5hve1R5vhrJ IZcgwZAiOtmik5lVi96glY5h6bugRwpexjhwORTLPBCkwiYotSxX99mWd6EHL576i5CNABEB AAHNGUplZmYgTGF3IDxsYXdAcmVkaGF0LmNvbT7CwI4EEwEIADgWIQR+niGjtnP5P/8PpRq8 fP682pgzWwUCWRsg7wIbAwULCQgHAgYVCAkKCwIEFgIDAQIeAQIXgAAKCRC8fP682pgzW5QG B/9VATJmx5235RB+8jiDYGXQf3vd9gBfPy/l1tsaK400eFAevDzfGvKmeCKe+uGnlrH3vyT8 rg9zqH+s5a1Y+lDXPOpJAFmmzbOLU4FW4ucbawmtYvBL65PqpQneCTYnC802/OAcxjm/Onem HlgeK6WicNsBTPwYN/0araDFUejyYBIFi9CNqqflwk5Z3brKbQ9bAYIkysVLC/c3njKPmM0c WPFHG91ubLbWCHwTIK0+mAL714eTD74dXzOjO2ZDBPLGlFN/kO3+YjaO6UOD2O8acvAMCivT kWLr7JwRgLIQDN2DkhQDd3LTPqQE/yOcMcXBTO+fxm8KG0iKQBqWMyGJzsBNBFkbIO8BCACy qbOsv7XegSeea8XORt5zMaBVWKoSyhmmcCmlxZFS2cuYOBt79MO13lZE2DlO3Lv5IKikj/D4 ketGVO4+h5psEMH5Yz5P8bx0TmgwbK1GxPZrzeXozUFJDvvCDbIlT0v0pwUXuK3hg8Ieo2h5 uTed/cn1OjySXW5BqLxN0cyr5hL+J6dcsHvKLT/N3nTgCQhoJXK2MrEMhAGgF3jKpMn3CoS4 i/ZbNI2MQR6LWHwdZ95f0fI8NzHSfVzeLtzCKQec7nr9fgd6Ylk1ZpGWQUPlQmKjzYgeCeTK NO04cwt20WIrQWeWiZFPA0U86NDBdSBrYp4kG3dfIXE+wSSvE7qPABEBAAHCwHYEGAEIACAW IQR+niGjtnP5P/8PpRq8fP682pgzWwUCWRsg7wIbDAAKCRC8fP682pgzW3REB/9cT7iKRPg/ OK9bpLlllIEDM90IaKC79DQrv+fRudOR78cdV4XUwPSFnyHUsP3VJ4lDy5FhiKCwGie0BK53 EsxgMrLy1L8hboFdTE4Vi0xzCheMaMVp4hATDU29k1cuxu1VPpCa8E3mYeHjNV7ip0HN5L4D rfs8lRPJE/oM1vGs9DgQFZrCPPNRNGKC97BH+DHccesEJr7tSsQrkPkt0z/FTKr5wIM02vSx OJjgmcVbGB7dc2j/Sx8loXmuKnuKtM35668kUG8jeJvSQk3o/VHpD27bhl0rR68R2jN6G6kQ egMVb6dPu1Ius8rBE5rFw88J4JEb5q4hMNClWWUFHIdP
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- References: <20180331182740.GS2787@redhat.com> <331efc3b-511a-92d0-39d3-2174ab591296@redhat.com> <2c5b79fe-0930-26a9-e4cb-0143dd920cd2@sifive.com> <eb1c79ad-23d9-caca-1522-52f8e48320d3@redhat.com> <CADJ6UvP8NA9K4ij6OD6N0vaZSx3pPzHkTYhKp=4tnBQHn4nd4Q@mail.gmail.com> <24bff494-695e-bae9-e9f9-486046794793@redhat.com> <CA+yXCZAANOMUxp31MAWM3u3PF0UzR7SON6-zE3sJm8SrMp1Mow@mail.gmail.com> <mvm7epf7axc.fsf@suse.de>
On 04/10/2018 01:55 AM, Andreas Schwab wrote:
> On Apr 10 2018, Kito Cheng <kito.cheng@gmail.com> wrote:
>
>> You can use -r option (e.g. ./qemu-riscv64 -r 4.15) or set QEMU_UNAME
>> environment variable to change the uname for qemu.
>
> But be aware that the emulated environment still assumes that all system
> calls implemented by 4.15 are available, and qemu linux-user generally
> just passes them through to the host kernel. If the host kernel is too
> old to provide a particular system call the emulation may malfunction.
Well understood. For my needs it likely is a non-issue.
jeff