QEMU configure script goes into an infinite error printing loop
when in read only directory due to 'build' dir never being created.

Checking if 'mkdir dir' succeeds prevents this error.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/321
Signed-off-by: Dinah Baum <dinahbaum...@gmail.com>
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
---
 configure | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index cf6db3d551..1ef3e7f77d 100755
--- a/configure
+++ b/configure
@@ -31,7 +31,12 @@ then
         fi
     fi
 
-    mkdir build
+    if ! mkdir build || ! touch $MARKER
+    then
+        echo "ERROR: Could not create ./build directory. Check the permissions 
on"
+        echo "your source directory, or try doing an out-of-tree build."
+        exit 1
+    fi
     touch $MARKER
 
     cat > GNUmakefile <<'EOF'
-- 
2.30.2


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