12-23-2008
Can C determine which OS it's being compiled on?
Hello all! I've searched the archives, google, documentation and I can't seem to find any answer regarding my question.
Our code has to be lint free and due to the following lint warning ---> logical expression always true: op "||"
<--- we are forced to #include <note.h > (which appears to be Solaris specific) in order to use "NOTE(CONSTCOND) /*CONSTCOND*/" within the code to suppress the above warning. Any ideas on whether or not standard C can determine an OS? Ideally, I'd like C to determine what OS and from there include the header or not based on OS . . . if SunOS, then include note.h, else do not. I know this is far-fetched but had to ask. TIA!
Steven
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LEARN ABOUT OPENDARWIN
lint
lint(1B) SunOS/BSD Compatibility Package Commands lint(1B)
NAME
lint - C program verifier
SYNOPSIS
/usr/ucb/lint [options]
DESCRIPTION
/usr/ucb/lint is the interface to the BSD Compatibility Package C program verifier. It is a script that looks for the link
/usr/ccs/bin/ucblint to the C program verifier. /usr/ccs/bin/ucblint is available only with the SPROcc package, whose default location is
/opt/SUNWspro. /usr/ucb/lint is identical to /usr/ccs/bin/ucblint, except that BSD headers are used and BSD libraries are linked before
base libraries. The /opt/SUNWspro/man/man1/lint.1 man page is available only with the SPROcc package.
OPTIONS
/usr/ucb/lint accepts the same options as /usr/ccs/bin/ucblint, with the following exceptions:
-Idir Search dir for included files whose names do not begin with a slash (/) prior to searching the usual directories. The
directories for multiple -I options are searched in the order specified. The preprocessor first searches for #include files
in the directory containing sourcefile, and then in directories named with -I options (if any), then /usr/ucbinclude, and
finally, in /usr/include.
-Ldir Add dir to the list of directories searched for libraries by /usr/ccs/bin/ucblint. This option is passed to
/usr/ccs/bin/ld. Directories specified with this option are searched before /usr/ucblib and /usr/lib.
-Y P, dir Change the default directory used for finding libraries.
EXIT STATUS
The following exit values are returned:
0 Successful completion.
>0 An error occurred.
FILES
/usr/lint/bin/ld link editor
/usr/lib/libc C library
/usr/ucbinclude BSD Compatibility directory for header files
/usr/ucblib BSD Compatibility directory for libraries
/usr/ucblib/libucb BSD Compatibility C library
/usr/lib/libsocket library containing socket routines
/usr/lib/libnsl library containing network functions
/usr/lib/libelf library containing routines to process ELF object files
/usr/lib/libaio library containing asynchronous I/O routines
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWscpu |
+-----------------------------+-----------------------------+
SEE ALSO
ld(1), a.out(4), attributes(5)
SunOS 5.10 1 Feb 1995 lint(1B)