[Bug c/52952] Wformat location info is bad (wrong column number)

[steven at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52952

--- Comment #2 from Steven Bosscher <steven at gcc dot gnu.org> 2012-05-17 21:19:28 UTC ---
To fix this properly, the input location should be tracked for the format
string. The location of the format string as argument to printf is available in 
c-family/c-format.c:check_format_info() but there is no location information
for the characters within the string. The location for every character in the
format string should be recorded to pin-point the right line/column (think e.g.
for a broken long line).