configure: Don't assume that QMAKE_CXX will be found at the start of line

Change 86636e0c4ab introduced "isEmpty(QMAKE_CXX): QMAKE_CXX = g++"
instead of "QMAKE_CXX = g++", which failed when configure was looking
for QMAKE_CXX at the beginning of the line. We now allow either the
beginning of the line or a space before QMAKE_CXX.

1 files changed, 1 insertions, 1 deletions

diff --git a/configure b/configure
index bf81e26..f6f5cfb 100755
--- a/configure
+++ b/configure
@@ -3162,7 +3162,7 @@ else
     CFG_FRAMEWORK=no
 fi
 
-QMAKE_CONF_COMPILER=`getQMakeConf "$XQMAKESPEC" | grep "^QMAKE_CXX[^_A-Z0-9]" | sed "s,.* *= *\(.*\)$,\1," | tail -1`
+QMAKE_CONF_COMPILER=`getQMakeConf "$XQMAKESPEC" | grep "\(^\|\s\)QMAKE_CXX[^_A-Z0-9]" | sed "s,.* *= *\(.*\)$,\1," | tail -1`
 TEST_COMPILER="$CXX"
 
 [ -z "$TEST_COMPILER" ] && TEST_COMPILER=$QMAKE_CONF_COMPILER