Refactor runtests to allow to specify files on command line (#4609)

test/cfg/runtests.sh

@@ -406,9 +406,8 @@ function cppunit_fn {
     fi
 }
 
-for f in "${DIR}"*.{c,cpp}
-do
-    f=$(basename $f)
+function check_file {
+    f=$(basename $1)
     case $f in
         boost.cpp)
             boost_fn
@@ -506,9 +505,19 @@ do
           echo "Unhandled file $f"
           exit_if_strict
     esac
+}
+
+function check_files
+{
+for f in "$@"
+do
+    check_file $f
 done
+}
 
 # Check the syntax of the defines in the configuration files
+function check_defines_syntax
+{
     if ! xmlstarlet --version; then
         echo "xmlstarlet needed to extract defines, skipping defines check."
         exit_if_strict
@@ -523,5 +532,14 @@ else
             echo "$EXTRACTED_DEFINES" | gcc -fsyntax-only -xc -Werror -
         done
     fi
+}
+
+if [ $# -eq 0  ]
+then
+    check_files "${DIR}"*.{c,cpp}
+    check_defines_syntax
+else
+    check_files "$@"
+fi
 
 echo SUCCESS