[PATCH v2] abicompat: Add prompt message for abnormal operation

[tangmeng]

When using abicompat, if the user configures the
lib2 path while using the xxx option, the configuration
of lib2 is not actually processed in the command
execution process, and there is no prompt message.
It will cause lib2 to be considered to have been processed,
so a warning is added here to prompt the user.

            * tools/abicompat.cc (main): Add warning tips for some actions
            (main): Remove extra spaces in the comment code

Signed-off-by: tangmeng <tangmeng@uniontech.com>
---
 tools/abicompat.cc | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/abicompat.cc b/tools/abicompat.cc
index 60cd794f..989915f3 100644
--- a/tools/abicompat.cc
+++ b/tools/abicompat.cc
@@ -390,7 +390,7 @@ perform_compat_check_in_normal_mode(options& opts,
   return status;
 }
 
-/// An description of a change of the type of a function.  It contains
+/// An description of a change of the type of a function. It contains
 /// the declaration of the function we are interested in, as well as
 /// the differences found in the type of that function.
 struct fn_change
@@ -638,6 +638,13 @@ main(int argc, char* argv[])
       return 0;
     }
 
+  if (opts.weak_mode && !opts.lib2_path.empty())
+    {
+      emit_prefix(argv[0], cout)
+        << "WARNING: The \'--weak-mode\' option is used. The "
+	<< opts.lib2_path << " will be ignored automatically\n";
+    }
+
   ABG_ASSERT(!opts.app_path.empty());
   if (!abigail::tools_utils::check_file(opts.app_path, cerr, opts.prog_name))
     return abigail::tools_utils::ABIDIFF_ERROR;
-- 
2.20.1