[PATCH v3] configure: Add 'mkdir build' check

[Dinah Baum]

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 <dinahbaum123@gmail.com>
---
Changes since v2:
Updated error message
Reverted changes to 'help' command

 configure | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index 00415f0b48..784f9d18a5 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
+            your source directory, or try doing an out-of-tree build."
+        exit 1
+    fi
     touch $MARKER
 
     cat > GNUmakefile <<'EOF'
-- 
2.30.2