z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

The following are extensions to the POSIX standard:
v The -v, -V, -0, -1, -2 and -3 options
v DLL support
v IPA optimization support
v The behavior of the -o option in combination with the -c option and a single
source file.
Note: -Ox (where x is 0, 1, 2, or 3) is equivalent to -x because -x overrides -O.
This happens to match the standard compliant syntax of optimization level x
(-Ox), but Ox is not treated as a single entity. It may appear redundant to
use -Ox but it is recommended because it improves portability. In order to
avoid creating non-portable legacy, the xlc utility does not support -x
extension syntax. For example, the following are equivalent but the first
syntax is recommended:
c89 -O2 hello.c
c89 -2 hello.c
Features have been added to z/OS releases, which have made it easier to port
applications from other platforms to z/OS and improve performance. For
compatibility reasons, these portability and performance enhancements could not be
made the default. If you are porting an application from another platform to z/OS,
you may want to start by specifying the following options:
c89 -o HelloWorld -2 -Wc,NOANSIALIAS -Wc,XPLINK\
-Wl,XPLINK -Wc,’FLOAT(IEEE)’ -Wc,’GONUM’ HelloWorld.c
Note: The example string is one line (had to be splite). A space exists between
-Wc,XPLINK and -Wl,XPLINK.
Related information
ar, dbx, file, lex, makedepend, nm, strings, strip, yacc
c99 — Compile, link-edit and assemble C source code and create an
executable file on z/OS
See xlc.
Note: When working in the shell, to view man page information about c99, type:
man xlc.
cal — Display a calendar for a month or year
Format
Description
cal [month ] [year]
cal displays a calendar on standard output (stdout).
c89, cc, and c++
v With no arguments, cal displays a calendar for the current month of the current
year.
v If one argument is given and it is numeric, cal interprets it as a year (for
example, 1991); if a single argument is not numeric, cal interprets it as the name
of a month, possibly abbreviated (for example, apr).
Chapter 2. Shell command descriptions 105