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diff --git a/indra/cmake/run_build_test.py b/indra/cmake/run_build_test.py
new file mode 100644
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+++ b/indra/cmake/run_build_test.py
@@ -0,0 +1,97 @@
+#!/usr/bin/python
+"""\
+@file   run_build_test.py
+@author Nat Goodspeed
+@date   2009-09-03
+@brief  Helper script to allow CMake to run some command after setting
+        environment variables.
+
+CMake has commands to run an external program. But remember that each CMake
+command must be backed by multiple build-system implementations. Unfortunately
+it seems CMake can't promise that every target build system can set specified
+environment variables before running the external program of interest.
+
+This helper script is a workaround. It simply sets the requested environment
+variables and then executes the program specified on the rest of its command
+line.
+
+Example:
+
+python run_build_test.py -DFOO=bar myprog somearg otherarg
+
+sets environment variable FOO=bar, then runs:
+myprog somearg otherarg
+
+$LicenseInfo:firstyear=2009&license=internal$
+Copyright (c) 2009, Linden Research, Inc.
+$/LicenseInfo$
+"""
+
+import os
+import sys
+import subprocess
+
+def main(command, libpath=[], vars={}):
+    """Pass:
+    command is a sequence (e.g. a list) of strings. The first item in the list
+    must be the command name, the rest are its arguments.
+
+    libpath is a sequence of directory pathnames. These will be appended to
+    the platform-specific dynamic library search path environment variable.
+
+    vars is a dict of arbitrary (var, value) pairs to be added to the
+    environment before running 'command'.
+
+    This function runs the specified command, waits for it to terminate and
+    returns its return code. This will be negative if the command terminated
+    with a signal, else it will be the process's specified exit code.
+    """
+    # Handle platform-dependent libpath first.
+    if sys.platform == "win32":
+        lpvars = ["PATH"]
+    elif sys.platform == "darwin":
+        lpvars = ["LD_LIBRARY_PATH", "DYLD_LIBRARY_PATH"]
+    elif sys.platform.startswith("linux"):
+        lpvars = ["LD_LIBRARY_PATH"]
+    else:
+        # No idea what the right pathname might be! But only crump if this
+        # feature is requested.
+        if libpath:
+            raise NotImplemented("run_build_test: unknown platform %s" % sys.platform)
+        lpvars = []
+    for var in lpvars:
+        # Split the existing path
+        dirs = os.environ[var].split(os.pathsep)
+        # Append the sequence in libpath
+        dirs.extend(libpath)
+        # Now rebuild the path string. This way we use a minimum of separators
+        # -- and we avoid adding a pointless separator when libpath is empty.
+        os.environ[var] = os.pathsep.join(dirs)
+    # Now handle arbitrary environment variables. The tricky part is ensuring
+    # that all the keys and values we try to pass are actually strings.
+    os.environ.update(dict([(str(key), str(value)) for key, value in vars.iteritems()]))
+    # Run the child process.
+    return subprocess.call(command)
+
+if __name__ == "__main__":
+    from optparse import OptionParser
+    parser = OptionParser(usage="usage: %prog [options] command args...")
+    parser.add_option("-D", "--define", dest="vars", default=[], action="append",
+                      metavar="VAR=value",
+                      help="Add VAR=value to the env variables defined")
+    parser.add_option("-l", "--libpath", dest="libpath", default=[], action="append",
+                      metavar="DIR",
+                      help="Add DIR to the platform-dependent DLL search path")
+    opts, args = parser.parse_args()
+    # What we have in opts.vars is a list of strings of the form "VAR=value"
+    # or possibly just "VAR". What we want is a dict. We can build that dict by
+    # constructing a list of ["VAR", "value"] pairs -- so split each
+    # "VAR=value" string on the '=' sign (but only once, in case we have
+    # "VAR=some=user=string"). To handle the case of just "VAR", append "" to
+    # the list returned by split(), then slice off anything after the pair we
+    # want.
+    rc = main(command=args, libpath=opts.libpath,
+              vars=dict([(pair.split('=', 1) + [""])[:2] for pair in opts.vars]))
+    print >>sys.stderr, "Failure running: %s" % " ".join(args)
+    print >>sys.stderr, "Error: %s" % rc
+    sys.exit((rc < 0) and 255 or rc)