[Bug c/92720] cc1 accepts #include /dev/stdin inline

[dclarke at blastwave dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92720

--- Comment #8 from Dennis Clarke <dclarke at blastwave dot org> ---
(In reply to joseph@codesourcery.com from comment #6)
.
.
.
> In turn, that section "Include Operation" has more details.  It doesn't 
> mention includes with an absolute path, but I think that's because the 
> general concept of resolving a path relative to a directory, and how that 
> handles absolute paths, is one for the underlying operating system, not 
> for any particular application running on that operating system.

I hope someone agrees that this seems like black magic : 

esther$ 
esther$ uname -a 
Linux esther 5.3.0-2-686 #1 SMP Debian 5.3.9-3 (2019-11-19) i686 GNU/Linux

esther$ cat /proc/version 
Linux version 5.3.0-2-686 (debian-kernel@lists.debian.org) (gcc version 9.2.1
20191109 (Debian 9.2.1-19)) #1 SMP Debian 5.3.9-3 (2019-11-19)

esther$ gcc --version 
gcc (Debian 9.2.1-19) 9.2.1 20191109
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


esther$ ( /usr/bin/printf "\042"; dd if=/dev/urandom bs=16 count=1 2>/dev/null
| od -Ax -t x1 -v | tr -d '\012' | cut -c8-54 | tr -d '\012';/usr/bin/printf
"\042\n" ) | gcc -std=iso9899:1999 -pedantic -pedantic-errors -Wpedantic
-fno-builtin -O0 -D_XOPEN_SOURCE=600 -o /tmp/wtf /tmp/wtf.c 
esther$ /tmp/wtf 
1e e8 6e 82 6a a4 0b 66 0f d5 48 33 2a 86 21 6b
esther$ 

Which makes one wonder what would happen if I were to merely include
/dev/urandom directly. 

Dennis