r232287 - in /trunk/gcc: ChangeLog gcc.c

[hainque@gcc.gnu.org]

Author: hainque
Date: Tue Jan 12 17:53:14 2016
New Revision: 232287

URL: https://gcc.gnu.org/viewcvs?rev=232287&root=gcc&view=rev
Log:
Prevent "undef var" errors on gcc --help or --version with self-specs

        * gcc.c (spec_undefvar_allowed): New global.
        (process_command): Set to true when running for --version or --help,
        alone or together.
        (getenv_spec_function): When the variable is not defined, use the
        variable name as the variable value if we're allowed not to issue
        a fatal error.


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