1 files changed, 64 insertions, 0 deletions
diff --git a/python/mozbuild/mozbuild/compilation/util.py b/python/mozbuild/mozbuild/compilation/util.py
new file mode 100644
index 0000000000..fc06382a3b
--- /dev/null
+++ b/python/mozbuild/mozbuild/compilation/util.py
@@ -0,0 +1,64 @@
+# 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/.
+
+import os
+
+
+def check_top_objdir(topobjdir):
+    top_make = os.path.join(topobjdir, "Makefile")
+    if not os.path.exists(top_make):
+        print(
+            "Your tree has not been built yet. Please run "
+            "|mach build| with no arguments."
+        )
+        return False
+    return True
+
+
+def get_build_vars(directory, cmd):
+    build_vars = {}
+
+    def on_line(line):
+        elements = [s.strip() for s in line.split("=", 1)]
+
+        if len(elements) != 2:
+            return
+
+        build_vars[elements[0]] = elements[1]
+
+    try:
+        old_logger = cmd.log_manager.replace_terminal_handler(None)
+        cmd._run_make(
+            directory=directory,
+            target="showbuild",
+            log=False,
+            print_directory=False,
+            num_jobs=1,
+            silent=True,
+            line_handler=on_line,
+        )
+    finally:
+        cmd.log_manager.replace_terminal_handler(old_logger)
+
+    return build_vars
+
+
+def sanitize_cflags(flags):
+    # We filter out -Xclang arguments as clang based tools typically choke on
+    # passing these flags down to the clang driver.  -Xclang tells the clang
+    # driver driver to pass whatever comes after it down to clang cc1, which is
+    # why we skip -Xclang and the argument immediately after it.  Here is an
+    # example: the following two invocations pass |-foo -bar -baz| to cc1:
+    # clang -cc1 -foo -bar -baz
+    # clang -Xclang -foo -Xclang -bar -Xclang -baz
+    sanitized = []
+    saw_xclang = False
+    for flag in flags:
+        if flag == "-Xclang":
+            saw_xclang = True
+        elif saw_xclang:
+            saw_xclang = False
+        else:
+            sanitized.append(flag)
+    return sanitized