NAME

     pkgconf — a system for configuring build dependency information

SYNOPSIS

     pkgconf [options] [list of modules]

DESCRIPTION

     pkgconf is a program which helps to configure compiler and linker flags for development
     frameworks. This allows build systems to detect other dependencies and use them with the
     system toolchain.

GENERAL OPTIONS

     --version
             Display the supported pkg-config version and exit.

     --atleast-pkgconfig-version=VERSION
             Exit with error if we do not support the requested pkg-config version.

     --errors-to-stdout
             Print all errors on the main output stream instead of the error output stream.

     --silence-errors
             Do not display any errors at all.

     --list-all
             Walk all directories listed in the PKG_CONFIG_PATH environmental variable and
             display information on packages which have registered information there.

     --simulate
             Simulates resolving a dependency graph based on the requested modules on the command
             line. Dumps a series of trees denoting pkgconf's resolver state.

     --no-cache
             Skip caching packages when they are loaded into the internal resolver.  This may
             result in an alternate dependency graph being computed.

     --ignore-conflicts
             Ignore ‘Conflicts’ rules in modules.

     --env-only
             Learn about pkgconf's configuration strictly from environmental variables.

     --maximum-traverse-depth=DEPTH
             Impose a limit on the allowed depth in the dependency graph.  For example, a depth
             of 2 will restrict the resolver from acting on child dependencies of modules added
             to the resolver's solution.

     --static
             Compute a deeper dependency graph and use compiler/linker flags intended for static
             linking.

MODULE-SPECIFIC OPTIONS

     --atleast-version=VERSION
             Exit with error if a module's version is less than the specified version.

     --exact-version=VERSION
             Exit with error if a module's version is not exactly the specified version.

     --max-version=VERSION
             Exit with error if a module's version is greater than the specified version.

     --exists
             Exit with a non-zero result if the dependency resolver was able to find all of the
             requested modules.

     --uninstalled
             Exit with a non-zero result if the dependency resolver uses an ‘uninstalled’ module
             as part of it's solution.

     --no-uninstalled
             Forbids the dependency resolver from considering 'uninstalled' modules as part of a
             solution.

QUERY-SPECIFIC OPTIONS

     --cflags, --cflags-only-I, --cflags-only-other
             Display either all CFLAGS, only -I CFLAGS or only CFLAGS that are not -I.

     --libs, --libs-only-L, --libs-only-l, --libs-only-other
             Display either all linker flags, only -L linker flags, only -l linker flags or only
             linker flags that are not -L or -l.

     --keep-system-cflags, --keep-system-libs
             Keep CFLAGS or linker flag fragments that would be filtered due to being included by
             default in the compiler.

     --define-variable=VARNAME=VALUE
             Define VARNAME as VALUE.  Variables are used in query output, and some modules'
             results may change based on the presence of a variable definition.

     --print-variables
             Print all seen variables for a module to the output channel.

     --variable=VARNAME
             Print the value of VARNAME.

     --print-requires, --print-requires-private
             Print the modules included in either the Requires field or the Requires.private
             field.

     --digraph
             Dump the dependency resolver's solution as a graphviz ‘dot’ file. This can be used
             with graphviz to visualize module interdependencies.

ENVIRONMENT

     PKG_CONFIG_PATH
             List of directories where ‘.pc’ files are looked up.

     PKG_CONFIG_SYSROOT_DIR
             ‘sysroot’ directory, will be prepended to every path defined in PKG_CONFIG_PATH.
             Useful for cross compilation.

EXAMPLES

     Displaying the CFLAGS of a package:
           $ pkgconf --cflags foo
           -fPIC -I/usr/include/foo