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Full Discussion: Integer size with different compile
Top Forums Programming Integer size with different compile Post 303000978 by jim mcnamara on Monday 24th of July 2017 02:29:49 PM
Old 07-24-2017
cd to /usr/include

Two header files - limits.h and stdint.h have everything the compiler can know about integer sizes in bits, usually WORD_BITS and CHAR_BITS are used to define the rest of the macros.

You may have some compiler options to control long int size, I do not know.

Start with that. BTW you should have tried to read these and some other header files just to get an idea about what settings your compiler can and does employ.

There should be/is a man page for each of the important header files like math.h
 

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LEARN ABOUT OPENSOLARIS

cc

cc(1B)						     SunOS/BSD Compatibility Package Commands						    cc(1B)

NAME

       cc - C compiler

SYNOPSIS

       /usr/ucb/cc [options]

DESCRIPTION

       /usr/ucb/cc  is the interface to the BSD Compatibility Package C compiler. It is a script that looks for the link /usr/ccs/bin/ucbcc to the
       C compiler. The /usr/ccs/bin/ucbcc link is available only with the SPROcc package, whose default location is /opt/SUNWspro. The /usr/ucb/cc
       interface  is  identical  to  /usr/ccs/bin/ucbcc, except that BSD headers are used and BSD  libraries are linked before base libraries. The
       /opt/SUNWspro/man/man1/acc.1 man page is available only with the SPROcc package.

OPTIONS

       The /usr/ucb/cc interface accepts the same options as /usr/ccs/bin/ucbcc, 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 directo-
		    ries  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/ucbcc. This option is passed to /usr/ccs/bin/ld and
		    /usr/lib. 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 compilation or link edit.

       >0    An error occurred.

FILES

       /usr/ccs/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)

NOTES

       The -Y P, dir option may have unexpected results and should not be used.

SunOS 5.11							    24 Feb 1998 							    cc(1B)
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