warning: trigraph ... ignored

[Thorsten Kranzkowski]

Hi!
During my latest linux kernel compile I saw several of these warnings:

gcc -D__KERNEL__ -I/usr/src/linux-2.4.0-test1-ac18-work/include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -fno-strict-aliasing -pipe -mno-fp-regs -ffixed-8 -mcpu=ev4 -Wa,-mev6   -DEXPORT_SYMTAB -c md.c
In file included from /usr/src/linux-2.4.0-test1-ac18-work/include/linux/raid/md.h:35,
                 from md.c:32:
/usr/src/linux-2.4.0-test1-ac18-work/include/linux/delay.h:19:44: warning: trigraph ??/ ignored


The relevant part of delay.h (linenumbers added):

14 /*
15  * Using udelay() for intervals greater than a few milliseconds can
16  * risk overflow for high loops_per_sec (high bogomips) machines. The
17  * mdelay() provides a wrapper to prevent this.  For delays greater
18  * than MAX_UDELAY_MS milliseconds, the wrapper is used.  Architecture
19  * specific values can be defined in asm-???/delay.h as an override.
20  * The 2nd mdelay() definition ensures GCC will optimize away the 
21  * while loop for the common cases where n <= MAX_UDELAY_MS  --  Paul G.
22  */


I don't exactly know what trigraphs are, I assume some weird replacement
expression for unusual characters. But I don't think gcc should warn about 
them in _comments_ !

gcc version 2.96 20000530 (experimental)
linux 2.3.99-pre3 
glibc 2.1.3
Alpha AXPpci33 'Noname'


please CC me as I'm not on the list

Bye,
Thorsten
-- 
| Thorsten Kranzkowski        Internet: dl8bcu@gmx.net                        |
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