Subject: Re: MACHINE_ARCH vs. OBJ_ARCH
To: Jonathan Stone <jonathan@DSG.Stanford.EDU>
From: Todd Vierling <tv@pobox.com>
List: tech-toolchain
Date: 07/26/1998 18:23:32
On Sun, 26 Jul 1998, Jonathan Stone wrote:
: >I will be using ${MACHINE_ARCH:C/^mipse[bl]$/mips/} as per Jason's
: >suggestion. It even retains compatibility with old make binaries.
:
: Ok but do you mean everywhere we test against mips, or only the
: subdir walk??
The subdir walk. Tests for mips (for capability to build/use a program,
for example, which is the most prominent case) will change:
(${MACHINE_ARCH} == "mips")
to:
(${MACHINE_ARCH:Mmips*} != "")
This wildcard method can expand to other platforms, too. (sparc64, possibly
in the future.)
: >: and makeflist,
: >
: >No need to hack this - it's a hack to begin with, and can just use more than
: >one file. If /you/ want just one file for "ad.mips", there
: Yes, I do want, because in my head it will always be one arch:->.
Then I'll keep it in mind, and probably do it last.
: >ONLY_FOR_ARCHS=mips*
: >ONLY_FOR_ARCHS=mipsel*
:
: No, that's got global semantics for the whole file.
Yes, it is. Read the pkg docs - you are NOT to use an .if construct to
restrict architectures in a pkg.
: and we need to do that in all makefiles, pkg or otherwise, everywhere
: ${MACHINE_ARCH} is compared to "mips". And similarly for sparc64.
The places MACHINE_ARCH should be compared is /minimal/. The fact that more
than one MACHINE_ARCH uses the same asm code directories in the NetBSD tree
is a special case, and a regex or glob match is fine.
: I think it's clearly better engineering than scattering ed patterns
: for 3 arches -- mips le/e, 64/ 32; sparc 64/32, powerpc 64/32 one day
: -- all throughout the tree. And I still havent heard any reason _not_
: to do it that way. Curious.
"Tradition."
if [ "`uname -m`" = ... ]
--
-- Todd Vierling (Personal tv@pobox.com; Bus. todd_vierling@xn.xerox.com)