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Date:      Wed, 20 Nov 2019 16:44:58 -0800
From:      John Baldwin <jhb@FreeBSD.org>
To:        "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
Cc:        Warner Losh <imp@bsdimp.com>, src-committers <src-committers@freebsd.org>, svn-src-all <svn-src-all@freebsd.org>, svn-src-head <svn-src-head@freebsd.org>
Subject:   Re: svn commit: r354900 - head/usr.sbin/jail
Message-ID:  <5d4541f5-fe6c-ecc7-c383-0dfd9596ec0f@FreeBSD.org>
In-Reply-To: <A9CE2EDE-BF95-41EA-9F21-868804E992A2@lists.zabbadoz.net>
References:  <201911201654.xAKGsMTv094014@repo.freebsd.org> <CANCZdfqVLZUqGiCDagwkULH7xegrZwehRsn8Ek-BJR=OVTpXGw@mail.gmail.com> <59bf120c-2f35-1a22-b6fa-a9c9bb8cfdf4@FreeBSD.org> <CANCZdfoG198Qqj90NS=NZ_%2BsMWoEPffGcJJmg25u4U97KgPfBQ@mail.gmail.com> <991bdc33-516d-6e6d-1880-44930441893d@FreeBSD.org> <A9CE2EDE-BF95-41EA-9F21-868804E992A2@lists.zabbadoz.net>

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On 11/20/19 3:42 PM, Bjoern A. Zeeb wrote:
> On 20 Nov 2019, at 23:32, John Baldwin wrote:
> 
> Hijacking a side-thread:
> 
> PreS: I think we have way too many of these options and should just 
> remove 3/4 of them again or someone build a proper matrix documenting 
> them all and in which case to use in the developers handbook ;-)
> 
>> This one also seems dubious, but in a different way:
>>
>> usr.bin/Makefile:
>>
>> # ARM64TODO gprof does not build
>> # RISCVTODO gprof does not build
>> .if ${MACHINE_ARCH} != "aarch64" && ${MACHINE_CPUARCH} != "riscv"
>> SUBDIR.${MK_TOOLCHAIN}+=        gprof
>> .endif
>>
>> Somewhat exacerbated by the whole aarch64 vs arm64 thing and probably
>> confusion on when to use CPUARCH vs ARCH.
> 
> This particular case could actually be removed as I thought I made that 
> at least compile when I was working on s390x:
> https://svnweb.freebsd.org/base?view=revision&revision=351329
> 
> 
> You can however find more of these elsewhere:
> 
> ../lib/libc/tests/sys/Makefile:.if ${MACHINE_CPUARCH} != "aarch64" && 
> ${MACHINE_CPUARCH} != "riscv"
> ../lib/libcompiler_rt/Makefile.inc:.if ${MACHINE_CPUARCH} == "aarch64" 
> || ${MACHINE_CPUARCH} == "riscv"
> ../stand/libsa/Makefile:.if ${MACHINE_CPUARCH} == "aarch64" || 
> ${MACHINE_CPUARCH} == "riscv"
> ../usr.bin/Makefile:.if ${MACHINE_ARCH} != "aarch64" && 
> ${MACHINE_CPUARCH} != "riscv"
> ../usr.bin/gprof/Makefile:.if ${MACHINE_ARCH} != "aarch64" && 
> ${MACHINE_ARCH} != "riscv" && \

The tests comparing MACHINE_CPUARCH against aarch64 are confusing indeed.
My understanding is that MACHINE_CPUARCH is arm64 for aarch64?  It's kind
of hard to guess since arch(7) goes to great length to try to describe
these variables but doesn't give a handy table of what they actually are
for the various architectures.

-- 
John Baldwin



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