* Detect and show general error (e.g. commandline error with clang)

git-svn-id: https://svn.code.sf.net/p/codeblocks/code/trunk@9568 2a5c6006-c6dd-42ca-98ab-0921f2732cef
* Fix deprecated commandline-options for clang; add needed linker options; check for colliding options; modified patch of Rahul Sundaram (Fedora maintainer)

git-svn-id: https://svn.code.sf.net/p/codeblocks/code/trunk@9569 2a5c6006-c6dd-42ca-98ab-0921f2732cef