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On 12/29/2013 05:13 PM, Markos Chandras wrote: |
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> On 12/29/2013 09:52 PM, Anthony G. Basile wrote: |
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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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>>>>> Matt can probably vouch for this better, but the only two ABIs |
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>>>>> 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 |
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>>>>> should |
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>>>>> be needed for o32-based installs. |
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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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>>> Yes all 3 ABIs use the same tuple. |
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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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> There is only one default ABI, so the toolchain should be named after |
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> that. But that does not mean the toolchain can't build for different ABIs |
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> |
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No because that would confuse a toolchain which only supports n32 with |
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one that supports o32/n32/n64. Anyhow, Michał response is heading in |
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the right direction where we'd have to use multiple tuple on multilib |
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system support more than one lib. I'm still not sure where this will |
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land us with respect to gnuconfig and other tuple parsing tools that |
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bring in their own assumptions. |
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|
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-- |
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Anthony G. Basile, Ph.D. |
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Gentoo Linux Developer [Hardened] |
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E-Mail : blueness@g.o |
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GnuPG FP : 1FED FAD9 D82C 52A5 3BAB DC79 9384 FA6E F52D 4BBA |
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GnuPG ID : F52D4BBA |
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