Support clang without version suffix for coverage testing.

configure

@@ -199,6 +199,19 @@ case `$cc -v 2>&1` in
 esac
 
 if test "$clang" -eq 1; then
+  if test "$cc" = "clang"; then
+    if `llvm-cov --version > /dev/null`; then
+      GCOV="llvm-cov-${clangV}"
+      LLVM_GCOV_FLAG="gcov"
+    else
+      cover=0
+      LLVM_GCOV_FLAG=""
+      echo "Deactivating cover as no suitable gcov can be found"
+    fi
+    GCOV="llvm-cov"
+    LLVM_GCOV_FLAG="gcov"
+    echo "Using ${GCOV} for coverage"
+  else
     clangV=`echo "$cc" | sed -e 's/^.*-//'`
     if `llvm-cov-${clangV} --version > /dev/null`; then
       GCOV="llvm-cov-${clangV}"
@@ -210,6 +223,7 @@ if test "$clang" -eq 1; then
       echo "Deactivating cover as no suitable gcov can be found"
     fi
   fi
+fi
 
 show $cc -c $test.c
 if test "$gcc" -eq 1 && ($cc -c $test.c) >> configure.log 2>&1; then