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C89(1) BSD General Commands Manual C89(1)
NAME
c89 -- standard C language compiler
SYNOPSIS
c89 [-cEgs] [-D name[=value]] ... [-I directory ...] [-L directory ...] [-o outfile] [-O optlevel]
[-U name ...] operand ...
DESCRIPTION
This is the name of the C language compiler as required by the IEEE Std 1003.1-2001 (``POSIX.1'') stan-dard. standard.
dard.
The c89 compiler accepts the following options:
-c Suppress the link-edit phase of the compilation, and do not remove any object files that are
produced.
-D name[=value]
Define name as if by a C-language #define directive. If no ``=value'' is given, a value of 1
will be used. Note that in order to request a translation as specified by IEEE Std 1003.1-2001
(``POSIX.1''), you need to define _POSIX_C_SOURCE=200112L either in the source or using this
option. The -D option has lower precedence than the -U option. That is, if name is used in
both a -U and a -D option, name will be undefined regardless of the order of the options. The
-D option may be specified more than once.
-E Copy C-language source files to the standard output, expanding all preprocessor directives; no
compilation will be performed.
-g Produce symbolic information in the object or executable files.
-I directory
Change the algorithm for searching for headers whose names are not absolute pathnames to look
in the directory named by the directory pathname before looking in the usual places. Thus,
headers whose names are enclosed in double-quotes ("") will be searched for first in the direc-tory directory
tory of the file with the #include line, then in directories named in -I options, and last in
the usual places. For headers whose names are enclosed in angle brackets (<>), the header will
be searched for only in directories named in -I options and then in the usual places. Directo-ries Directories
ries named in -I options shall be searched in the order specified. The -I option may be speci-fied specified
fied more than once.
-L directory
Change the algorithm of searching for the libraries named in the -l objects to look in the
directory named by the directory pathname before looking in the usual places. Directories
named in -L options will be searched in the order specified. The -L option may be specified
more than once.
-o outfile
Use the pathname outfile, instead of the default a.out, for the executable file produced.
-O optlevel
If optlevel is zero, disable all optimizations. Otherwise, enable optimizations at the speci-fied specified
fied level.
-s Produce object and/or executable files from which symbolic and other information not required
for proper execution has been removed (stripped).
-U name
Remove any initial definition of name. The -U option may be specified more than once.
An operand is either in the form of a pathname or the form -l library. At least one operand of the
pathname form needs to be specified. Supported operands are of the form:
file.c A C-language source file to be compiled and optionally linked. The operand must be
of this form if the -c option is used.
file.a A library of object files, as produced by ar(1), passed directly to the link editor.
file.o An object file produced by c89 -c, and passed directly to the link editor.
-l library Search the library named liblibrary.a. A library will be searched when its name is
encountered, so the placement of a -l operand is significant.
SEE ALSO
ar(1), c89(1), cc(1)
STANDARDS
The c89 utility interface conforms to IEEE Std 1003.1-2001 (``POSIX.1''). Since it is a wrapper around
GCC, it is limited to the C89 features that GCC actually implements.
BSD October 7, 2002 BSD
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