[Qemu-devel] [PATCH for-2.0 V3] tests/acpi-test: do not run iasl on big endian machines

[Marcel Apfelbaum <marcel.a@redhat.com>]

There is an issue with iasl on big endian machines: It
cannot disassemble acpi tables taken from little endian
machines, so we cannot check the expected tables.

Do not run iasl on those machines until this
problem is solved by the acpica community.

Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
---
V2 -> V3:
 Addressed Michael S. Tsirkin's review:
 - tests don't need to re-run detection, use configure
   to figure out if it is an LE machine.

V1 -> V2:
 Addressed an offline tip for a much cleaner
 macro line, thanks!

 configure | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index aae617e..2c0a3b2 100755
--- a/configure
+++ b/configure
@@ -4656,7 +4656,10 @@ else
 fi
 echo "PYTHON=$python" >> $config_host_mak
 echo "CC=$cc" >> $config_host_mak
-if $iasl -h > /dev/null 2>&1; then
+# All known versions of iasl on BE machines are broken.
+# TODO: add detection code once a non-broken version makes an appearance.
+if ($iasl -h > /dev/null 2>&1) &&
+   (lscpu | grep "Byte Order" | grep --quiet "Little Endian" ); then
   echo "IASL=$iasl" >> $config_host_mak
 fi
 echo "CC_I386=$cc_i386" >> $config_host_mak
-- 
1.8.3.1