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Subject: [Bug c/47781] warnings from custom printf format specifiers
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D47781

--- Comment #2 from Mark Glines <mark-gcc at glines dot org> 2011-02-17 11:=
58:22 UTC ---
Created attachment 23380
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=3D23380
47781.c

Here's a rather silly test case that demonstrates the problem with a simple
"bool" type.

$ gcc -O2 -Wall -o 47781 47781.c
47781.c: In function =E2=80=98main=E2=80=99:
47781.c:12: warning: unknown conversion type character =E2=80=98b=E2=80=99 =
in format
47781.c:12: warning: unknown conversion type character =E2=80=98b=E2=80=99 =
in format
47781.c:12: warning: too many arguments for format
$ ./47781
true bool: TRUE  false bool: FALSE
$


(That's on x86-64 linux with gcc 4.4.4-14ubuntu5 and libc6 2.12.1-0ubuntu10=
.2.)