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PKGCONF(1) General Commands Manual PKGCONF(1)

pkgconf
a system for configuring build dependency information

pkgconf [options] [list of modules]

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

Display the supported pkg-config version and exit.
=VERSION
Exit with error if we do not support the requested pkg-config version.
Print all errors on the main output stream instead of the error output stream.
Do not display any errors at all.
Walk all directories listed in the PKG_CONFIG_PATH environmental variable and display information on packages which have registered information there.
Simulates resolving a dependency graph based on the requested modules on the command line. Dumps a series of trees denoting pkgconf's resolver state.
Skip caching packages when they are loaded into the internal resolver. This may result in an alternate dependency graph being computed.
Ignore ‘Conflicts’ rules in modules.
Learn about pkgconf's configuration strictly from environmental variables.
=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.
Compute a deeper dependency graph and use compiler/linker flags intended for static linking.
Treats the computed dependency graph as if it were pure. This is mainly intended for use with the --static flag.
Ignore ‘Provides’ rules in modules when resolving dependencies.
=PATH
Adds a new module search path to pkgconf's dependency resolver. Paths added in this way are given preference before other paths.
Attempts to determine the prefix variable to use for CFLAGS and LIBS entry relocations. This is mainly useful for platforms where framework SDKs are relocatable, such as Windows.
Disables the ‘define-prefix’ feature.
=VARIABLE
Sets the ‘prefix’ variable used by the ‘define-prefix’ feature.
=PATH
Relocates a path using the pkgconf_path_relocate API. This is mainly used by the testsuite to provide a guaranteed interface to the system's path relocation backend.
Disables the path relocation feature.

=VERSION
Exit with error if a module's version is less than the specified version.
=VERSION
Exit with error if a module's version is not exactly the specified version.
=VERSION
Exit with error if a module's version is greater than the specified version.
Exit with a non-zero result if the dependency resolver was unable to find all of the requested modules.
Exit with a non-zero result if the dependency resolver uses an ‘uninstalled’ module as part of it's solution.
Forbids the dependency resolver from considering 'uninstalled' modules as part of a solution.

, --cflags-only-I, --cflags-only-other
Display either all CFLAGS, only -I CFLAGS or only CFLAGS that are not -I.
, --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-libs
Keep CFLAGS or linker flag fragments that would be filtered due to being included by default in the compiler.
=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 all seen variables for a module to the output channel.
Print all relevant ‘Provides’ entries for a module to the output channel.
=VARNAME
Print the value of VARNAME.
, --print-requires-private
Print the modules included in either the Requires field or the Requires.private field.
Dump the dependency resolver's solution as a graphviz ‘dot’ file. This can be used with graphviz to visualize module interdependencies.
Display the filenames of the ‘.pc’ files used by the dependency resolver for a given dependency set.
=VARNAME
Print the requested values as variable declarations in a similar format as the env(1) command.
=TYPES
Filter the fragment lists for the specified types.

PKG_CONFIG_PATH
List of secondary directories where ‘.pc’ files are looked up.
PKG_CONFIG_LIBDIR
List of primary 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.
PKG_CONFIG_TOP_BUILD_DIR
Provides an alternative setting for the ‘pc_top_builddir’ global variable.
PKG_CONFIG_PURE_DEPGRAPH
If set, enables the same behaviour as the --pure flag.
PKG_CONFIG_SYSTEM_INCLUDE_PATH
List of paths that are considered system include paths by the toolchain. This is a pkgconf-specific extension.
PKG_CONFIG_SYSTEM_LIBRARY_PATH
List of paths that are considered system library paths by the toolchain. This is a pkgconf-specific extension.
PKG_CONFIG_DISABLE_UNINSTALLED
If set, enables the same behaviour as the --no-uninstalled flag.
PKG_CONFIG_LOG
‘logfile’ which is used for dumping audit information concerning installed module versions.
PKG_CONFIG_DEBUG_SPEW
If set, enables additional debug logging. The format of the debug log messages is implementation-specific.
PKG_CONFIG_DONT_RELOCATE_PATHS
If set, disables the path relocation feature.

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

pc(5), pkg.m4(7)
November 15, 2016 Linux 4.20.11-arch2-1-ARCH