[Bug c/59717] better warning when using functions without including appropriate header files

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59717

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Oct  7 17:49:46 2014
New Revision: 215979

URL: https://gcc.gnu.org/viewcvs?rev=215979&root=gcc&view=rev
Log:
    PR c/59717
    * c-decl.c (header_for_builtin_fn): New function.
    (implicitly_declare): Suggest which header to include.

    * gcc.dg/pr59717.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr59717.c
Modified:
    trunk/gcc/c/ChangeLog
    trunk/gcc/c/c-decl.c
    trunk/gcc/testsuite/ChangeLog