[Bug c/78304] [7 Regression] -Wformat doesn't warn anymore for inttypes.h format string argument type mismatches

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78304

--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Author: dmalcolm
Date: Fri Jan 13 19:27:43 2017
New Revision: 244453

URL: https://gcc.gnu.org/viewcvs?rev=244453&root=gcc&view=rev
Log:
Don't suppress bogus usage of macros from system headers in -Wformat (PR
c/78304)

gcc/ChangeLog:
        PR c/78304
        * substring-locations.c (format_warning_va): Strengthen case 1 so
        that both endpoints of the substring must be within the format
        range for just the substring to be printed.

gcc/testsuite/ChangeLog:
        PR c/78304
        * gcc.dg/format/diagnostic-ranges.c (test_macro): Undef INT_FMT.
        (test_macro_2): New test.
        (test_macro_3): New test.
        (test_macro_4): New test.
        (test_non_contiguous_strings): Convert line number to line offset.
        * gcc.dg/format/pr78304-2.c: New test case.
        * gcc.dg/format/pr78304.c: New test case.


Added:
    trunk/gcc/testsuite/gcc.dg/format/pr78304-2.c
    trunk/gcc/testsuite/gcc.dg/format/pr78304.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/substring-locations.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/format/diagnostic-ranges.c