Not appropriate for upstream; presumed fixed in newer versions.

--- mozjs-24.2.0/js/src/build/virtualenv/populate_virtualenv.py	2013-10-29 13:40:23.000000000 -0700
+++ mozjs-24.2.0/js/src/build/virtualenv/populate_virtualenv.py	2015-06-27 16:28:50.182353664 -0700
@@ -251,10 +251,8 @@
         # work.
         #
         # We also ignore environment variables that may have been altered by
-        # configure or a mozconfig activated in the current shell. We trust
-        # Python is smart enough to find a proper compiler and to use the
-        # proper compiler flags. If it isn't your Python is likely broken.
-        IGNORE_ENV_VARIABLES = ('CC', 'CXX', 'CFLAGS', 'CXXFLAGS', 'LDFLAGS',
+        # configure or a mozconfig activated in the current shell.
+        IGNORE_ENV_VARIABLES = ('CFLAGS', 'CXXFLAGS', 'LDFLAGS',
             'PYTHONDONTWRITEBYTECODE')
 
         try:
--- mozjs-24.2.0/js/src/python/mozbuild/mozbuild/controller/building.py	2013-10-29 13:40:25.000000000 -0700
+++ mozjs-24.2.0/js/src/python/mozbuild/mozbuild/controller/building.py	2015-06-27 16:50:05.967006567 -0700
@@ -12,7 +12,7 @@
 from collections import namedtuple
 
 # keep in sync with psutil os support, see psutil/__init__.py
-if sys.platform.startswith("freebsd") or sys.platform.startswith("darwin") or sys.platform.startswith("win32") or sys.platform.startswith("linux"):
+if sys.platform.startswith("freebsd") or sys.platform.startswith("darwin") or sys.platform.startswith("win32") or sys.platform.startswith("linux") or sys.platform.startswith("sunos"):
     try:
         import psutil
     except ImportError: