1 files changed, 208 insertions, 0 deletions
diff --git a/build/moz.configure/pkg.configure b/build/moz.configure/pkg.configure
new file mode 100644
index 0000000000..6b460ae174
--- /dev/null
+++ b/build/moz.configure/pkg.configure
@@ -0,0 +1,208 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+@depends(toolchain_prefix, when=compile_environment)
+def pkg_config(prefixes):
+    return tuple("{}pkg-config".format(p) for p in (prefixes or ()) + ("",))
+
+
+pkg_config = check_prog(
+    "PKG_CONFIG",
+    pkg_config,
+    bootstrap=depends(when=target_sysroot.bootstrapped)(lambda: "pkgconf"),
+    allow_missing=True,
+    when=compile_environment
+    & depends(target.os)(lambda os: os not in ("WINNT", "OSX", "Android")),
+)
+
+
+@depends_if(pkg_config)
+@checking("for pkg-config version")
+def pkg_config_version(pkg_config):
+    return Version(check_cmd_output(pkg_config, "--version").rstrip())
+
+
+@depends_if(pkg_config)
+@checking("whether pkg-config is pkgconf")
+def is_pkgconf(pkg_config):
+    return "pkgconf " in check_cmd_output(pkg_config, "--about", onerror=lambda: "")
+
+
+@depends(is_pkgconf, pkg_config_version, target_sysroot.bootstrapped, when=pkg_config)
+def pkg_config_base_flags(is_pkgconf, pkg_config_version, target_sysroot_bootstrapped):
+    # pkgconf 1.7.4 changed the default on Windows to use --static, but
+    # that doesn't work for us.
+    # Note: the --shared flag is not available before pkgconf 1.7
+    flags = []
+    if is_pkgconf and pkg_config_version >= "1.7.4":
+        flags.append("--shared")
+    # When pkg-config is in /usr things work fine by default, but when
+    # it is not, it defines prefix to be something else than /usr, which
+    # won't match what the .pc files actually say, and won't work in
+    # sysroots.
+    if target_sysroot_bootstrapped and (
+        (is_pkgconf and pkg_config_version >= "1.2.0")
+        or (not is_pkgconf and pkg_config_version >= "0.29.0")
+    ):
+        flags.append("--dont-define-prefix")
+    return tuple(flags)
+
+
+@depends(target, target_sysroot.path, target_multiarch_dir, when=pkg_config)
+@imports(_from="os", _import="environ")
+@imports(_from="os", _import="pathsep")
+def pkg_config_vars(target, sysroot_path, multiarch_dir):
+    if sysroot_path and target.kernel != "Darwin":
+        return namespace(
+            PKG_CONFIG_PATH="",
+            PKG_CONFIG_SYSROOT_DIR=sysroot_path,
+            PKG_CONFIG_LIBDIR=pathsep.join(
+                os.path.join(sysroot_path, d)
+                for d in (
+                    "usr/lib/pkgconfig",
+                    "usr/lib/{}/pkgconfig".format(multiarch_dir),
+                    "usr/share/pkgconfig",
+                )
+            ),
+        )
+
+
+@depends(pkg_config_vars)
+@imports(_from="os", _import="environ")
+def pkg_config_env(vars):
+    if vars:
+        env = dict(environ)
+        env["PKG_CONFIG_PATH"] = vars.PKG_CONFIG_PATH
+        env["PKG_CONFIG_SYSROOT_DIR"] = vars.PKG_CONFIG_SYSROOT_DIR
+        env["PKG_CONFIG_LIBDIR"] = vars.PKG_CONFIG_LIBDIR
+        return env
+
+
+set_config("PKG_CONFIG_PATH", pkg_config_vars.PKG_CONFIG_PATH)
+set_config("PKG_CONFIG_SYSROOT_DIR", pkg_config_vars.PKG_CONFIG_SYSROOT_DIR)
+set_config("PKG_CONFIG_LIBDIR", pkg_config_vars.PKG_CONFIG_LIBDIR)
+
+
+# Locates the given module using pkg-config.
+# - `var` determines the name of variables to set when the package is found.
+#   <var>_CFLAGS and <var>_LIBS are set with corresponding values.
+# - `package_desc` package name and version requirement string, list of
+#   strings describing packages to locate, or depends function that will
+#   resolve to such a string or list of strings.
+# - `when` a depends function that will determine whether to perform
+#   any checks (default is to always perform checks).
+# - `allow_missing` If set, failure to fulfill the package description
+#   will not result in an error or logged message, and any error message
+#   will be returned to the caller.
+#   Returns `True` when the package description is fulfilled.
+@template
+def pkg_check_modules(
+    var, package_desc, when=always, allow_missing=False, config=True, cflags_only=False
+):
+    @depends(dependable(package_desc), when=when)
+    def package_desc(desc):
+        if isinstance(desc, str):
+            desc = [desc]
+        if not isinstance(desc, (tuple, list)):
+            configure_error(
+                "package_desc must be a string or a tuple or list of strings"
+            )
+
+        return " ".join(desc)
+
+    allow_missing = dependable(allow_missing)
+
+    @depends(when, "--enable-compile-environment")
+    def when_and_compile_environment(when, compile_environment):
+        return when and compile_environment
+
+    @depends(pkg_config, pkg_config_version, when=when_and_compile_environment)
+    def check_pkg_config(pkg_config, version):
+        min_version = "0.9.0"
+        if pkg_config is None:
+            die(
+                "*** The pkg-config script could not be found. Make sure it is\n"
+                "*** in your path, or set the PKG_CONFIG environment variable\n"
+                "*** to the full path to pkg-config."
+            )
+        if version < min_version:
+            die(
+                "*** Your version of pkg-config is too old. You need version %s or newer.",
+                min_version,
+            )
+
+    @depends(
+        pkg_config,
+        pkg_config_env,
+        package_desc,
+        allow_missing,
+        when=when_and_compile_environment,
+    )
+    @imports("sys")
+    @imports(_from="mozbuild.configure.util", _import="LineIO")
+    def package(pkg_config, env, package_desc, allow_missing):
+        # package_desc may start as a depends function, so we can't use
+        # @checking here.
+        log.info("checking for %s... " % package_desc)
+        retcode, stdout, stderr = get_cmd_output(
+            pkg_config,
+            "--errors-to-stdout",
+            "--print-errors",
+            package_desc,
+            env=env,
+        )
+        if retcode == 0:
+            log.info("yes")
+            return True
+        log.info("no")
+        log_writer = log.warning if allow_missing else log.error
+        with LineIO(lambda l: log_writer(l)) as o:
+            o.write(stdout)
+        if not allow_missing:
+            sys.exit(1)
+
+    @depends(
+        pkg_config, pkg_config_env, package_desc, pkg_config_base_flags, when=package
+    )
+    @checking("%s_CFLAGS" % var, callback=lambda t: " ".join(t))
+    def pkg_cflags(pkg_config, env, package_desc, base_flags):
+        args = list(base_flags) + ["--cflags", package_desc]
+        flags = check_cmd_output(pkg_config, *args, env=env)
+        return tuple(flags.split())
+
+    if cflags_only:
+
+        @depends(pkg_cflags, when=package)
+        def pkg_info(cflags):
+            return namespace(cflags=cflags)
+
+    else:
+
+        @depends(
+            pkg_config,
+            pkg_config_env,
+            package_desc,
+            pkg_config_base_flags,
+            when=package,
+        )
+        @checking("%s_LIBS" % var, callback=lambda t: " ".join(t))
+        def pkg_libs(pkg_config, env, package_desc, base_flags):
+            args = list(base_flags) + ["--libs", package_desc]
+            libs = check_cmd_output(pkg_config, *args, env=env)
+            # Remove evil flags like -Wl,--export-dynamic
+            return tuple(libs.replace("-Wl,--export-dynamic", "").split())
+
+        @depends(pkg_cflags, pkg_libs, when=package)
+        def pkg_info(cflags, libs):
+            return namespace(cflags=cflags, libs=libs)
+
+    if config:
+        set_config("%s_CFLAGS" % var, pkg_cflags)
+        if not cflags_only:
+            set_config("%s_LIBS" % var, pkg_libs)
+
+    return pkg_info