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

c89, cc, and c++
c89/cc/c++ environment variable, c89/cc/c++ does not affect the MVS
search order. The data set is listed here for information only, to assist in
identifying the correct data set to be added to the MVS program search
order.
The following data set is also used:
The data set ${prefix_CLIB_PREFIX}.SCCNOBJ contains object files
required to instrument the code for profile-driven feedback optimization.
The default value is CBC.
prefix_CMEMORY
A suggestion as to the use of compiler C/C++ Runtime Library memory
files. When set to 0, c89/cc/c++ will prefer to use the compiler
NOMEMORY option. When set to 1, c89/cc/c++ will prefer to use the
compiler MEMORY option. When set to 1, and if the compiler MEMORY
option can be used, c89/cc/c++ need not allocate data sets for the
corresponding work files. In this case it is the responsibility of the user to
not override the compiler options (using the -W option) with the
NOMEMORY option or any other compiler option which implies the
NOMEMORY option.
The default value is 1.
prefix_CMSGS (14)
The Language Environment national language name used by the compiler
program. A null value will cause the default Language Environment
NATLANG run-time name to be used, and a non-null value must be a valid
Language Environment NATLANG run-time option name (Language
Environment run-time options are described in z/OS Language Environment
Programming Guide . The default value is "" (null).
prefix_CNAME (14)
The name of the compiler program called by c89/cc/c++. It must be a
member of a data set in the search order used for MVS programs. The
default value is CCNDRVR. If c89/cc/c++ is being used with
prefix_CVERSION set to a release prior to z/OS V1R2, the default value
will be CBCDRVR.
prefix_CSUFFIX (15)
The suffix by which c89/cc/c++ recognizes a C source file. The default
value is c.
prefix_CSUFFIX_HOST (15)
The suffix by which c89/cc/c++ recognizes a C source data set. The default
value is C.
prefix_CSYSLIB (4, 16)
The system library data set concatenation to be used to resolve #include
directives during compilation.
86 z/OS V1R9.0 UNIX System Services Command Reference
Normally #include directives are resolved using all the information specified
including the directory name. When c89/cc/c++ can determine that the
directory information can be used, such as when the include (header) files
provided by Language Environment are installed in the default location (in
accordance with prefix_INCDIRS), then the default concatenation is
"" (null).
When c89/cc/c++ cannot determine that the directory information can be
used, then the default concatenation is: