1 files changed, 103 insertions, 0 deletions
diff --git a/build/moz.configure/pkg.configure b/build/moz.configure/pkg.configure
new file mode 100644
index 0000000000..20d90f17fd
--- /dev/null
+++ b/build/moz.configure/pkg.configure
@@ -0,0 +1,103 @@
+# -*- 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, allow_missing=True)
+
+
+@depends_if(pkg_config)
+@checking("for pkg-config version")
+def pkg_config_version(pkg_config):
+    return Version(check_cmd_output(pkg_config, "--version").rstrip())
+
+
+# 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):
+    if isinstance(package_desc, (tuple, list)):
+        package_desc = " ".join(package_desc)
+    package_desc = dependable(package_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, package_desc, allow_missing, when=when_and_compile_environment)
+    @imports("sys")
+    @imports(_from="mozbuild.configure.util", _import="LineIO")
+    def package(pkg_config, 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
+        )
+        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, package_desc, when=package)
+    @checking("%s_CFLAGS" % var, callback=lambda t: " ".join(t))
+    def pkg_cflags(pkg_config, package_desc):
+        flags = check_cmd_output(pkg_config, "--cflags", package_desc)
+        return tuple(flags.split())
+
+    @depends(pkg_config, package_desc, when=package)
+    @checking("%s_LIBS" % var, callback=lambda t: " ".join(t))
+    def pkg_libs(pkg_config, package_desc):
+        libs = check_cmd_output(pkg_config, "--libs", package_desc)
+        # 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)
+        set_config("%s_LIBS" % var, pkg_libs)
+
+    return pkg_info