ccconfig(1p)
NAME
ccconfig - Get Convert::Binary::C configuration for a compiler
SYNOPSIS
ccconfig options [-- compiler-options]
options:
-c
--cc compiler compiler executable to test
default: auto-determined
-o
--output-file file output filename
default: output to stdout
-f
--output-format format output format
default: dumper
--basename name basename of the temporary test files
default: _t_e_s_t
-I
--inc-path path manually set compiler include path
--preprocess rule compiler rule for preprocessing
--compile-obj rule compiler rule for compiling objects
--compile-exe rule compiler rule for compiling executables
--c-ext ext extension of C source files
--pp-ext ext extension of preprocessor output files
--obj-ext ext extension of object files
--exe-ext ext extension of executable files
--nodelete don't delete temporary files
--norun don't try to run executables
--quiet don't display anything
--nostatus don't display status indicator
--version print version number
--debug debug mode
Placeholders allowed in compiler rules:
%c C source file
%o object file
%e executable file
%i preprocessor output file
| result is written to stdout (only at end of rule)
DESCRIPTION
"ccconfig" will try to determine a usable configuration for Convert::Binary::C from testing a compiler executable. It is not necessary that the binaries generated by the compiler can be executed, so "ccconfig" can also be used for cross-compilers. This tool is still experimental, and you should neither rely on its output without checking, nor expect it to work in your environment.
OPTIONS
"--cc" compiler
This option allows you to explicitly specify a compiler executable.
This is especially useful if you don't want to use your system
compiler. If this options is not given, "ccconfig" tries to guess a
compiler.
"--output-file" file
Write Convert::Binary::C configuration to the specified file. The
default is to write the configuration to "stdout".
"--output-format" format
Specify the output format of the Convert::Binary::C configuration. The
following formats are currently supported:
dumper Output a %config hash using Data::Dumper
require Output in a format suitable for require
The default is "dumper".
"--basename" name
Allows you to change the base name of the temporary test files. This
is used along with the various "-ext" options to build the filenames of
C source files, preprocessor output files, object files and
executables.
"--inc-path" path
This option allows you to manually set the include path of the
compiler. This is useful if "ccconfig" cannot determine the include
path automatically, most probably because it cannot parse the
preprocessor output. This option can be specified more than once.
"--preprocess" rule
Using this option, you can specify a rule that "ccconfig" uses to run
the compiler to get preprocessor output. Most compilers write the
preprocessor output to standard output when given the "-E" option, i.e.
cc -E foo.c
will preprocess foo.c to standard output. The corresponding rule for
"ccconfig" would be:
ccconfig --preprocess='-E %c |'
The <%c> will be replaced with the C source filename, and the pipe
symbol signals that the result will be written to standard output.
The following placeholders can be used in "ccconfig" rules:
%c C source file
%o object file
%e executable file
%i preprocessor output file
Usually, "ccconfig" tries to figure out the correct rules on its own.
"--compile-obj" rule
Like "--preprocess", this option allows you to define a rule for how to
compile an object file. For most compilers, this rule will be something
like
ccconfig --compile-obj='-c -o %o %c'
"--compile-exe" rule
Like "--preprocess", this option allows you to define a rule for how to
compile an executable file. For most compilers, this rule will be
something like
ccconfig --compile-exe='-o %e %c'
Note that it is sufficient to specify either "--compile-obj" or
"--compile-exe". So if your compiler can only create object files,
that's just fine.
"--c-ext"
This option is used along with "--basename" to build the name of a C
source file. This is usually set to ".c".
"--pp-ext"
This option is used along with "--basename" to build the name of a
preprocessor output file.
"--obj-ext"
This option is used along with "--basename" to build the name of an
object file.
"--exe-ext"
This option is used along with "--basename" to build the name of an
executable file.
"--nodelete"
Don't attempt to delete temporary files that have been created by the
compiler. Normally, "ccconfig" will look for all files with the same
basename as the temporary test file and delete them.
"--norun"
You can specify this option if the executables generated by your
compiler cannot be run on your machine, i.e. if you have a cross-
compiler. However, "ccconfig" will automatically find out that it
cannot run the executables.
When this option is set, a different set of algorithms is used to
determine a couple of configuration settings. These algorithms are all
based upon placing a special signature in the object file. They are
less reliable that the standard algorithms, so you shouldn't use them
unless you have to.
"--quiet"
Don't display anything except for the final configuration.
"--nostatus"
Hide the status indicator. Recommended if you want to redirect the
script output to a file:
ccconfig --nostatus >config.pl 2>ccconfig.log
"--version"
Writes the program name, version and path to standard output.
"--debug"
Generate tons of debug output. Don't use unless you know what you're
doing.
EXAMPLES
Normally, a simple
ccconfig
without arguments is enough if you want the configuration for your
system compiler. While "ccconfig" is running, it will write lots of
status information to "stderr". When it's done, it will usually dump a
Perl hash table to "stdout" which can be directly used as a
configuration for Convert::Binary::C.
If you want the configuration for a different compiler, or "ccconfig"
cannot determine your system compiler automatically, use
ccconfig -c gcc32
if your compiler's name is "gcc32".
If you want to pass additional options to the compiler, you can do so
after a double-dash on the command line:
ccconfig -- -g -DDEBUGGING
or
ccconfig -c gcc32 -- -ansi -fshort-enums
If you'd like to interface with the Perl core, you may find a suitable
configuration using something like:
ccconfig --cc=`perl -MConfig -e 'print $Config{cc}'` \
-- `perl -MConfig -e 'print $Config{ccflags}'`
COPYRIGHT
Copyright (c) 2002-2015 Marcus Holland-Moritz. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
SEE ALSO
See Convert::Binary::C.
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