dpkg-buildflags

Section: dpkg suite (1)
Updated: 2010-07-29
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NAME

dpkg-buildflags - returns build flags to use during package build  

SYNOPSIS

dpkg-buildflags [option...] command  

DESCRIPTION

dpkg-buildflags is a tool to retrieve compilation flags to use during build of Debian packages. The default flags are defined by the vendor but they can be extended/overriden in several ways:
1.
system-wide with /etc/dpkg/buildflags.conf;
2.
for the current user with $XDG_CONFIG_HOME/dpkg/buildflags.conf where $XDG_CONFIG_HOME defaults to $HOME/.config;
3.
temporarily with environment variables (see section ENVIRONMENT).

The configuration files can contain two types of directives:

SET flag value
Override the flag named flag to have the value value.
APPEND flag value
Extend the flag named flag with the options given in value. A space is prepended to the appended value if the flag's current value is non-empty.

The configuration files can contain comments on lines starting with a hash (#). Empty lines are also ignored.  

COMMANDS

--list
Print the list of flags supported by the current vendor (one per line). See the SUPPORTED FLAGS section for more information about them.
--export=format
Print to standard output shell (if format is sh) or make (if format is make) commands that can be used to export all the compilation flags in the environment. If the format value is not given, sh is assumed. Only compilation flags starting with an upper case character are included, others are assumed to not be suitable for the environment.
--get flag
Print the value of the flag on standard output. Exits with 0 if the flag is known otherwise exits with 1.
--origin flag
Print the origin of the value that is returned by --get. Exits with 0 if the flag is known otherwise exits with 1. The origin can be one of the following values:
vendor
the original flag set by the vendor is returned;
system
the flag is set/modified by a system-wide configuration;
user
the flag is set/modified by a user-specific configuration;
env
the flag is set/modified by an environment-specific configuration.
--help
Show the usage message and exit.
--version
Show the version and exit.
 

SUPPORTED FLAGS

CFLAGS
Options for the C compiler. The default value set by the vendor includes -g and the default optimization level (-O2 usually, or -O0 if the DEB_BUILD_OPTIONS environment variable defines noopt).
CPPFLAGS
Options for the C preprocessor. Default value: empty.
CXXFLAGS
Options for the C++ compiler. Same as CFLAGS.
FFLAGS
Options for the Fortran compiler. Same as CFLAGS.
LDFLAGS
Options passed to the compiler when linking executables or shared objects (if the linker is called directly, then -Wl and , have to be stripped from these options). Default value: empty.
 

FILES

/etc/dpkg/buildflags.conf
System wide configuration file.
$XDG_CONFIG_HOME/dpkg/buildflags.conf or $HOME/.config/dpkg/buildflags.conf
User configuration file.
 

ENVIRONMENT

DEB_flag_SET
This variable can be used to force the value returned for the given flag.
DEB_flag_APPEND
This variable can be used to append supplementary options to the value returned for the given flag.
 

AUTHOR

Copyright © 2010 Raphaël Hertzog

This is free software; see the GNU General Public Licence version 2 or later for copying conditions. There is NO WARRANTY.


 

Index

NAME
SYNOPSIS
DESCRIPTION
COMMANDS
SUPPORTED FLAGS
FILES
ENVIRONMENT
AUTHOR

This document was created by man2html, using the manual pages.
Time: 19:49:08 GMT, April 27, 2011