RFC: Issue about assumption of DOSish file-system for cygwin

[Dave Korn]

On 22/03/2011 11:00, Kai Tietz wrote:

> I noticed this issue while working on those directory-separator thing
> for DOSish file-systems, and somehow this looks odd to me. For some
> reason the filenames.h header assumes for cygwin DOSish file-system,
> but in fact cygwin uses POSIXish file-system. I assume this definition
> was caused by the times cygwin compiler had -mno-cygwin option, but
> well I think we should correct this by following patch.
> Dave, might it be that I am overlooking here something obvious, why
> cygwin should assume DOSish filesystem?

  Cygwin works in mixed mode, it can use both dos and posix paths; it'll even
preserve them into e.g. things like debug info:

> $ as C:/hello.s -o C:/hello2.o -g
> 
> $ ls C:/hello.s C:/hello2.o -la
> -rw-r--r-- 1 DKAdmin None  437 Mar 22 17:56 C:/hello.s
> -rw-r--r-- 1 DKAdmin None 1084 Mar 22 17:57 C:/hello2.o
> 
> $ nm C:/hello2.o
> 00000000 b .bss
> 00000000 d .data
> 00000000 r .rdata
> 00000000 N .stab
> 00000000 N .stabstr
> 00000000 t .text
>          U ___main
> 00000000 T _main
>          U _puts
> 
> $ objdump -g C:/hello2.o
> 
> C:/hello2.o:     file format pe-i386
> 
> C:/hello.s:
> /* file C:/hello.s line 10 addr 0x0 */
> /* file C:/hello.s line 11 addr 0x4 */
> /* file C:/hello.s line 12 addr 0x7 */
> /* file C:/hello.s line 13 addr 0xa */
> /* file C:/hello.s line 14 addr 0xb */
> /* file C:/hello.s line 15 addr 0xd */
> /* file C:/hello.s line 16 addr 0xe */
> /* file C:/hello.s line 17 addr 0x11 */
> /* file C:/hello.s line 18 addr 0x16 */
> /* file C:/hello.s line 19 addr 0x1d */
> /* file C:/hello.s line 20 addr 0x22 */
> /* file C:/hello.s line 21 addr 0x27 */
> /* file C:/hello.s line 22 addr 0x2a */
> /* file C:/hello.s line 23 addr 0x2b */
> /* file C:/hello.s line 24 addr 0x2c */
> /* file C:/hello.s line 25 addr 0x2f */
> 
> $ as /cygdrive/c/hello.s -o C:/hello3.o -g
> 
> $ objdump -g C:/hello3.o
> 
> C:/hello3.o:     file format pe-i386
> 
> /cygdrive/c/hello.s:
> /* file /cygdrive/c/hello.s line 10 addr 0x0 */
> /* file /cygdrive/c/hello.s line 11 addr 0x4 */
> /* file /cygdrive/c/hello.s line 12 addr 0x7 */
> /* file /cygdrive/c/hello.s line 13 addr 0xa */
> /* file /cygdrive/c/hello.s line 14 addr 0xb */
> /* file /cygdrive/c/hello.s line 15 addr 0xd */
> /* file /cygdrive/c/hello.s line 16 addr 0xe */
> /* file /cygdrive/c/hello.s line 17 addr 0x11 */
> /* file /cygdrive/c/hello.s line 18 addr 0x16 */
> /* file /cygdrive/c/hello.s line 19 addr 0x1d */
> /* file /cygdrive/c/hello.s line 20 addr 0x22 */
> /* file /cygdrive/c/hello.s line 21 addr 0x27 */
> /* file /cygdrive/c/hello.s line 22 addr 0x2a */
> /* file /cygdrive/c/hello.s line 23 addr 0x2b */
> /* file /cygdrive/c/hello.s line 24 addr 0x2c */
> /* file /cygdrive/c/hello.s line 25 addr 0x2f */
> 
> $

    cheers,
      DaveK