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On 12/29/2013 04:48 PM, Markos Chandras wrote: |
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> On 12/29/2013 09:48 PM, Michał Górny wrote: |
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>> Dnia 2013-12-29, o godz. 16:40:08 |
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>> Joshua Kinard <kumba@g.o> napisał(a): |
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>> |
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>>> On 12/28/2013 5:58 PM, Michał Górny wrote: |
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>>>> I've noticed today that mips uses the same CHOST value for all three |
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>>>> ABIs it supports: |
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>>>> |
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>>>> arch/mips/mips64/multilib/make.defaults:CHOST_o32="${CHOST}" |
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>>>> arch/mips/mips64/multilib/make.defaults:CHOST_n32=${CHOST} |
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>>>> arch/mips/mips64/multilib/make.defaults:CHOST_n64=${CHOST} |
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>>>> arch/mips/mipsel/mips64el/multilib/make.defaults:CHOST_o32="${CHOST}" |
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>>>> arch/mips/mipsel/mips64el/multilib/make.defaults:CHOST_n32="${CHOST}" |
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>>>> arch/mips/mipsel/mips64el/multilib/make.defaults:CHOST_n64="${CHOST}" |
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>>>> |
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>>>> [...] |
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>>> |
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>>> Matt can probably vouch for this better, but the only two ABIs affected by |
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>>> this are n32 and n64. mips[el]-unknown-linux-gnu implies a 32-bit |
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>>> big/little endian CHOST, which means the o32 ABI. |
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>>> mips64[el]-unknown-linux-gnu means either n32 or n64. So no change should |
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>>> be needed for o32-based installs. |
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>> |
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>> Just to be clear: |
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>> |
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>> profiles/arch/mips/mipsel/mips64el/multilib/make.defaults: |
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>> |
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>> CHOST="mips64el-unknown-linux-gnu" |
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>> |
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>> [...] |
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>> |
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>> CFLAGS_o32="-mabi=32" |
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>> CHOST_o32="${CHOST}" |
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>> |
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>> CFLAGS_n32="-mabi=n32" |
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>> CHOST_n32="${CHOST}" |
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>> |
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>> CFLAGS_n64="-mabi=64" |
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>> CHOST_n64="${CHOST}" |
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>> |
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>> So in this case, o32 actually uses mips64el-unknown-linux-gnu, unless |
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>> I'm missing something. |
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>> |
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> |
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> Yes all 3 ABIs use the same tuple. |
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> |
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|
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I think people are missing Mike's point from earlier, which is that |
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tuples label toolchains and a toolchain can support multiple abis. So |
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for example, what would one do on a system which simultaneously has o32, |
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n32 and n64? -gnuabi32n32n64 looks pretty crazy. |
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|
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-- |
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Anthony G. Basile, Ph. D. |
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Chair of Information Technology |
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D'Youville College |
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Buffalo, NY 14201 |
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(716) 829-8197 |
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