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

c89, cc, and c++
Environment variables
You can use environment variables to specify necessary system and operational
information to c89/cc/c++. When a particular environment variable is not set,
c89/cc/c++ uses the default shown. For information about the JCL parameters used
in these environment variables, see z/OS MVS JCL User’s Guide.
Each environment variable has a prefix (shown in italics) that should be replaced by
one of the following, depending on the command name used:
v _CC
v _CXX
v _C89
This means that to specify cc environment variables, the name shown must be
prefixed with _CC (for example, _CC_ACCEPTABLE_RC). To specify c89
environment variables, the name shown must be prefixed with _C89 (for example,
_C89_ACCEPTABLE_RC). To specify c++/cxx environment variables, the name
shown must be prefixed with _CXX (for example, _CXX_ACCEPTABLE_RC).
Notes:
1. For most environment variables, you can use all three prefixes (_CC, _CXX,
_C89). In the list of environment variables that follows, you should assume that
all three prefixes can be used unless otherwise indicated.
2. c89/cc/c++ can accept parameters only in the syntax indicated here. A null
value indicates that c89/cc/c++ should omit the corresponding parameters
during dynamic allocation. Numbers in parentheses following the environment
variable name correspond to usage notes, which begin on Page 97, and
indicate specific usage information for the environment variable.
prefix_ACCEPTABLE_RC
The maximum allowed return code (result) of any step (compile, assemble,
IPA Link, prelink, or link-edit). If the result is between zero and this value
(inclusive), then it is treated internally by c89/cc/c++ exactly as if it were a
zero result, except that message FSUM3065 is also issued. The default
value is 4.
When used under c89/cc/c++, the prelinker by default returns at least a 4
when there are duplicate symbols or unresolved writable static symbols (but
not for other unresolved references). The link editor returns at least a 4
when there are duplicate symbols, and at least an 8 when there are
unresolved references and automatic library call was used.
prefix_ASUFFIX (15)
The suffix by which c89/cc/c++ recognizes an archive file. This environment
variable does not affect the treatment of archive libraries specified as -l
operands, which are always prefixed with lib and suffixed with .a. The
default value is a.
prefix_ASUFFIX_HOST (15)
The suffix by which c89/cc/c++ recognizes a library data set. This
environment variable does not affect the treatment of data set libraries
specified as -l operands, which are always used exactly as specified. The
default value is LIB.
prefix_CCMODE
Controls how c89/cc/c++ does parsing. The default behavior of c89/cc/c++
is to expect all options to precede all operands. Setting this variable allows
compatibility with historical implementations (other cc commands). When
set to 1, c89/cc/c++ operates as follows:
84 z/OS V1R9.0 UNIX System Services Command Reference