On 05/26/2011 03:14 PM, malc wrote:
On Thu, 26 May 2011, Stefan Berger wrote:
With the below patch I can build either ppc (-m32) or ppc64 (-m64) versions of
Qemu (on a ppc64 host) when passing these compiler flags via 'configure ...
--extra-cflags="-m32"'.
Signed-off-by: Stefan Berger<stef...@linux.vnet.ibm.com>
---
configure | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
Index: qemu-git/configure
===================================================================
--- qemu-git.orig/configure
+++ qemu-git/configure
@@ -807,7 +807,14 @@ case "$cpu" in
arm*)
host_guest_base="yes"
;;
- ppc*)
+ ppc)
+ QEMU_CFLAGS="-m32 $QEMU_CFLAGS"
+ LDFLAGS="-m32 $LDFLAGS"
+ host_guest_base="yes"
+ ;;
+ ppc64)
+ QEMU_CFLAGS="-m64 $QEMU_CFLAGS"
+ LDFLAGS="-m64 $LDFLAGS"
host_guest_base="yes"
;;
mips*)
This isn't right, if one has particular toolchain and wants to build
something that defaults to a different bitlength he should be able to
do that, this patch attempts to outsmart the defaults and furthermore
prevents one from overriding the settings.
P.S. host-pcc... pcc?
P.P.S. On the ppc64 machine i have, gcc defaults to 32bit and for a
good reason - 64bit code is quite a bit slower when running
typical workloads (64bit guest not being one of them though)
Is it possible to change my ppc64 gcc compiler to produce 32bit binaries
by default -- how? I'd like to test this case because for me not passing
any parameters via --extra-cflags defaults to the ppc64 case above -
obviously it will produce 64 bit binaries by default. -m32 then ends up
in the ppc) case, -m64 again in the ppc64) case.
Stefan
