[Bug c/84195] newlines in deprecated diagnostics

[nickc at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84195

--- Comment #7 from Nick Clifton <nickc at gcc dot gnu.org> ---
Author: nickc
Date: Mon Jun 18 10:39:01 2018
New Revision: 261697

URL: https://gcc.gnu.org/viewcvs?rev=261697&root=gcc&view=rev
Log:
Ensure that control characters in user supplied error and warning messages are
escaped.

        PR 84195
        * tree.c (escaped_string): New class.  Converts an unescaped
        string into its escaped equivalent.
        (warn_deprecated_use): Use the new class to convert the
        deprecation message, if present.
        (test_escaped_strings): New self test.
        (test_c_tests): Add test_escaped_strings.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree.c