standard OS defines

does anyone know where i can find a list of standardized OS defines? i've come across the list below, but i haven't found an authoritative resource convince me these are standard/correct. even if they are i'm sure what i've found is a just a subset of a larger list--but i don't know where to look.

__CYGWIN__
__NetBSD__
__OpenBSD__
__linux__
__sun__

also, is there a tool that like getconf that i can use to pipe these defines into gcc at compile time?

thanks in advance,
bryan
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Quoted 11 lines · On Wednesday 22 August 2007 14:35:21 Bryan Christ wrote:

does anyone know where i can find a list of standardized OS defines? i've come across the list below, but i haven't found an authoritative resource convince me these are standard/correct. even if they are i'm sure what i've found is a just a subset of a larger list--but i don't know where to look.

__CYGWIN__
__NetBSD__
__OpenBSD__
__linux__
__sun__

Take a look at:
info cpp "System-specific Predefined Macros"

A good list is here:
http://predef.sourceforge.net/preos.html

Quoted 2 lines

also, is there a tool that like getconf that i can use to pipe these defines into gcc at compile time?

You can define macros on the command line by passing the -D flag to gcc.

Quoted 3 lines

thanks in advance,
bryan
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Thanks!  This list is exactly what I was looking for.  Too bad there's not a tool for piping to gcc--I was trying to avoid -D.

Bryan

Quoted 4 lines · On Wednesday 22 August 2007 15:28:17 Bryan Christ wrote:

Thanks! This list is exactly what I was looking for. Too bad there's not a tool for piping to gcc--I was trying to avoid -D.

Bryan

This is about as ugly as it gets, but here it is anyway:

echo -e "#ifndef __SOMETHING__\n#define __SOMETHING__\n#endif" | cat - infile.c | gcc -x c -o outfile.c -

Quoted 4 lines · On Wednesday 22 August 2007 15:28:17 Bryan Christ wrote:

Thanks!  This list is exactly what I was looking for.  Too bad there's not a tool for piping to gcc--I was trying to avoid -D.

Bryan

This is about as ugly as it gets, but here it is anyway:

echo -e "#ifndef __SOMETHING__\n#define __SOMETHING__\n#endif" | cat - infile.c | gcc -x c -o outfile.c -
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