blob: d6892d97fb976fdd20fd717fdc900f0099f0849f [file] [log] [blame]
# Copyright (c) 2013 The Chromium Authors. All rights reserved.
# Copyright (c) 2020-2024 Project CHIP Authors
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# Defines a config specifying the result of running pkg-config for the given
# packages. Put the package names you want to query in the "packages" variable
# inside the template invocation.
#
# You can also add defines via the "defines" variable. This can be useful to
# add this to the config to pass defines that the library expects to get by
# users of its headers.
#
# Example:
# pkg_config("mything") {
# packages = [ "mything1", "mything2" ]
# defines = [ "ENABLE_AWESOME" ]
# }
#
# You can also use "extra args" to filter out results (see pkg-config.py):
# extra_args = [ "-v, "foo" ]
#
# To ignore libs and ldflags (only cflags/defines will be set, which is useful
# when doing manual dynamic linking), set:
# ignore_libs = true
#
# To allow the build to proceed if (any of) the requested packages are absent, set:
# optional = true
# In this case the resulting config object will be empty.
import("//build_overrides/build.gni")
import("${build_root}/config/sysroot.gni")
declare_args() {
# A pkg-config wrapper to call instead of trying to find and call the right
# pkg-config directly. Wrappers like this are common in cross-compilation
# environments.
# Leaving it blank defaults to searching PATH for 'pkg-config' and relying on
# the sysroot mechanism to find the right .pc files.
pkg_config = ""
# A optional pkg-config wrapper to use for tools built on the host.
host_pkg_config = ""
system_libdir = "lib"
}
pkg_config_script = "${build_root}/config/linux/pkg-config.py"
# Define the args we pass to the pkg-config script for other build files that
# need to invoke it manually.
pkg_config_args = []
if (pkg_config != "") {
pkg_config_args += [
"-p",
pkg_config,
]
}
if (host_pkg_config != "") {
host_pkg_config_args = [
"-p",
host_pkg_config,
]
} else {
host_pkg_config_args = pkg_config_args
}
if (sysroot != "") {
pkg_config_args += [
"-s",
sysroot,
]
if (system_libdir != "") {
pkg_config_args += [
"--system_libdir",
system_libdir,
]
}
}
template("pkg_config") {
assert(defined(invoker.packages),
"Variable |packages| must be defined to be a list in pkg_config.")
config(target_name) {
if (host_toolchain == current_toolchain) {
args = host_pkg_config_args + invoker.packages
} else {
args = pkg_config_args + invoker.packages
}
if (defined(invoker.optional) && invoker.optional) {
args += [ "-o" ]
}
if (defined(invoker.extra_args)) {
args += invoker.extra_args
}
# pkgresult = [present, includes, cflags, libs, lib_dirs]
pkgresult = exec_script(pkg_config_script, args, "value")
if (pkgresult[0]) {
cflags = pkgresult[2]
foreach(include, pkgresult[1]) {
cflags += [ "-I$include" ]
}
if (!defined(invoker.ignore_libs) || !invoker.ignore_libs) {
libs = pkgresult[3]
lib_dirs = pkgresult[4]
}
# Link libraries statically for OSS-Fuzz fuzzer build
if (oss_fuzz) {
libs = []
ldflags = [ "-Wl,-Bstatic" ]
foreach(lib, pkgresult[3]) {
ldflags += [ "-l$lib" ]
}
ldflags += [ "-Wl,-Bdynamic" ]
lib_dirs = pkgresult[4]
}
forward_variables_from(invoker, [ "defines" ])
}
}
# Always forward visibility
forward_variables_from(invoker, [ "visibility" ])
}