[Bug preprocessor/27777] Bad diagnostic emission when #error contains a trigraph

[tromey at gcc dot gnu dot org]

------- Comment #4 from tromey at gcc dot gnu dot org  2007-02-14 19:50 -------
The patch I wrote does work.  But now I think deferring error
messages is not the best approach, since it imposes a cost on
all error message output.  Instead we could arrange for
#error (and #warning) to build up a message in a buffer which is
then printed after processing the line.  That way the cost would
only apply to the #error path.

Also I noticed a call to cpp_output_line in gcc/c-ppoutput.c.
This needs to be checked to see if it suffers from the same bug.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27777