Mouse wrote in
<202210152055.qaa24...@stone.rodents-montreal.org>:
|> Traditionally to avoid problems with repeated inclusion of a header
|> file, you put #include guards around it, say in sys/dev/foo.h:
|> [...]
|
|> With newer compilers this can be replaced by a single line in the
|> header file:
|
|> #pragma once
|
|Some newer compilers, perhaps. Unless and until it is standardized,
tcc yes, pcc not.
...
|> It's nonstandard, but using #pragma once is maybe a bit less
|> error-prone -- don't have to have to pollute the namespace with
Wow. I have never seen such an error.
(In fact _i_ use multiple inclusions consciously in a number of
places, and have always done so. This would not change, of
course.)
If it would have been a different poster i would have thought it
is April 1st, actually. #pragma once. Hey. It is a good thing.
I think it would have been cool to have it twenty years ago, most
of you would surely agree more so a decade or two earlier even.
Somehow they must have missed to implement it in the 70s.
(I personally struggle with
#?0|kent:pcc.git$ xz -l /usr/ports/built/tcc#20220817-1.pkg.tar.xz
Strms Blocks Compressed Uncompressed Ratio Check Filename
1 1 239.1 KiB 1149.5 KiB 0.208 CRC64
/usr/ports/built/tcc#20220817-1.pkg.tar.xz
#?0|kent:pcc.git$ xz -l /usr/ports/built/gcc#12.2.0-1.pkg.tar.xz
Strms Blocks Compressed Uncompressed Ratio Check Filename
1 1 47.6 MiB 204.9 MiB 0.232 CRC64
/usr/ports/built/gcc#12.2.0-1.pkg.tar.xz
#?0|kent:pcc.git$ xz -l /usr/ports/built/clang#15.0.2-1.pkg.tar.xz
Strms Blocks Compressed Uncompressed Ratio Check Filename
1 1 90.8 MiB 945.9 MiB 0.096 CRC64
/usr/ports/built/clang#15.0.2-1.pkg.tar.xz
#?0|kent:pcc.git$
but likely i am addressing the wrong people.)
A nice Sunday everybody.
--steffen
|
|Der Kragenbaer, The moon bear,
|der holt sich munter he cheerfully and one by one
|einen nach dem anderen runter wa.ks himself off
|(By Robert Gernhardt)
