From patchwork Fri Jan 19 16:42:59 2018
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Subject: [12/12] Fix configure for s390 qemu on alpine
X-Patchwork-Submitter: Christian Borntraeger <borntraeger@de.ibm.com>
X-Patchwork-Id: 863654
Message-Id: <1516380179-12737-1-git-send-email-borntraeger@de.ibm.com>
To: qemu-s390x@nongnu.org, qemu-devel@nongnu.org,
 Peter Maydell <peter.maydell@linaro.org>,
 Paolo Bonzini <pbonzini@redhat.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>,
 Alice Frosi <alice@linux.vnet.ibm.com>,
 Alice Frosi <alice@linux.vnet.ibm.comx>
Date: Fri, 19 Jan 2018 17:42:59 +0100
From: Christian Borntraeger <borntraeger@de.ibm.com>
List-Id: <qemu-devel.nongnu.org>

From: Alice Frosi <alice@linux.vnet.ibm.comx>

In alpine docker image the qemu-system-s390x build is broken and
it throws this error:
qemu-system-s390x: Initialization of device s390-ipl failed: could not
load bootloader 's390-ccw.img'

The grep command of busybox uses regex. This fails on binary data
(e.g. stops on every \0), so it does not identify the string 
BiGeNdIaN in the test case big/little. Therefore, it assumes 
that the architecture is little endian.

This fix solves the grep problem by printing the content of
TMPO with strings

Signed-off-by: Alice Frosi <alice@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
[some changes to patch description, add -a option to strings]
---
 configure | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index 6d8c996..383b14e 100755
--- a/configure
+++ b/configure
@@ -1906,9 +1906,9 @@ int main(int argc, char *argv[]) {
 EOF
 
 if compile_object ; then
-    if grep -q BiGeNdIaN $TMPO ; then
+    if strings -a $TMPO | grep -q BiGeNdIaN ; then
         bigendian="yes"
-    elif grep -q LiTtLeEnDiAn $TMPO ; then
+    elif strings -a $TMPO | grep -q LiTtLeEnDiAn ; then
         bigendian="no"
     else
         echo big/little test failed
