Re: [Crash-utility] [PATCH 0/5] let make flexible for multiple host
----- Original Message -----
Hi Dave,
This patch set will make configure or build flexible for host environment,
in particular dealing with cross compiler.
Please consider about this proposal.
patch#1:
By declaring tables about target and host relationships,
cleanup corresponding code and the new build combination will be
adapted briefly.
Remaining patches:
Try to relieve cross compiler burden by using explicit host_cross option.
I'm using cross compiler environ host=x86 for target=ppc,
and might attempt target=<another arch> in the near future.
I stocked private patches to accomplish cross compiling
but I'd like to discard them permanently with your agreement.
Thanks,
Toshi
I am presuming that you have successfully built a PPC binary on an
x86 or x86_64 host, and then you have copied the binary to a PPC host
that doesn't have a resident compiler? But then again, looking at your
patch as is, it looks like you can only allow "target=PPC" on a PPC64 host,
which is already supported?:
static struct host_table {
... [ cut ] ...
}, ppc[] = {
{
.host = PPC64,
.cflags = "-m32 -D_FILE_OFFSET_BITS=64 -fPIC",
.gdb_conf_flags = "--target=ppc-elf-linux CFLAGS=-m32",
}
};
In any case, I would prefer that you specifically address your
particular PPC-on-X86 build issue, because I'm not sure what
other combinations would be particularly useful.
I'm not particularly interested in speculative changes. The only
future architecture support I can see on the horizon is 64-bit ARM,
and that is a few a few years away. And we are lucky that x86 and
ARM have the same endianness and data-type sizes, so we can continue
(hopefully) to build x86_64 binaries to analyze 64-bit ARM vmcores
on x86_64 hosts.
Also, note that your patch fails because it collides with Rabin's queued
fix for building SIAL for target=ARM and target=PPC builds:
[Crash-utility] [PATCH] build sial with TARGET_CFLAGS
https://www.redhat.com/archives/crash-utility/2012-March/msg00113.html
Dave
Toshikazu Nakayama (5):
configure: retake the way of host compiler detection
Makefile: wrap cc, gcc and ar with common make valiables
make: add host_cross option
build_data: handle CC valiable
configure: handle cross compile with target=ppc host_cross=x86
Makefile | 144 +++++++++--------
configure.c | 441
++++++++++++++++++++++-----------------------------
extensions/Makefile | 10 +-
extensions/sial.mk | 6 +-
extensions/snap.mk | 6 +-
5 files changed, 289 insertions(+), 318 deletions(-)
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