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-rw-r--r--src/bootstrap/bootstrap_test.py8
-rwxr-xr-xsrc/bootstrap/configure.py14
2 files changed, 18 insertions, 4 deletions
diff --git a/src/bootstrap/bootstrap_test.py b/src/bootstrap/bootstrap_test.py
index 26bd80a008f..5ecda83ee66 100644
--- a/src/bootstrap/bootstrap_test.py
+++ b/src/bootstrap/bootstrap_test.py
@@ -112,6 +112,14 @@ class GenerateAndParseConfig(unittest.TestCase):
         build = self.serialize_and_parse(["--set", "profile=compiler"])
         self.assertEqual(build.get_toml("profile"), 'compiler')
 
+    def test_set_codegen_backends(self):
+        build = self.serialize_and_parse(["--set", "rust.codegen-backends=cranelift"])
+        self.assertNotEqual(build.config_toml.find("codegen-backends = ['cranelift']"), -1)
+        build = self.serialize_and_parse(["--set", "rust.codegen-backends=cranelift,llvm"])
+        self.assertNotEqual(build.config_toml.find("codegen-backends = ['cranelift', 'llvm']"), -1)
+        build = self.serialize_and_parse(["--enable-full-tools"])
+        self.assertNotEqual(build.config_toml.find("codegen-backends = ['llvm']"), -1)
+
 if __name__ == '__main__':
     SUITE = unittest.TestSuite()
     TEST_LOADER = unittest.TestLoader()
diff --git a/src/bootstrap/configure.py b/src/bootstrap/configure.py
index dd1851e29a9..571062a3a6f 100755
--- a/src/bootstrap/configure.py
+++ b/src/bootstrap/configure.py
@@ -153,8 +153,7 @@ v("experimental-targets", "llvm.experimental-targets",
   "experimental LLVM targets to build")
 v("release-channel", "rust.channel", "the name of the release channel to build")
 v("release-description", "rust.description", "optional descriptive string for version output")
-v("dist-compression-formats", None,
-  "comma-separated list of compression formats to use")
+v("dist-compression-formats", None, "List of compression formats to use")
 
 # Used on systems where "cc" is unavailable
 v("default-linker", "rust.default-linker", "the default linker")
@@ -168,8 +167,8 @@ o("extended", "build.extended", "build an extended rust tool set")
 v("tools", None, "List of extended tools will be installed")
 v("codegen-backends", None, "List of codegen backends to build")
 v("build", "build.build", "GNUs ./configure syntax LLVM build triple")
-v("host", None, "GNUs ./configure syntax LLVM host triples")
-v("target", None, "GNUs ./configure syntax LLVM target triples")
+v("host", None, "List of GNUs ./configure syntax LLVM host triples")
+v("target", None, "List of GNUs ./configure syntax LLVM target triples")
 
 v("set", None, "set arbitrary key/value pairs in TOML configuration")
 
@@ -182,6 +181,11 @@ def err(msg):
     print("configure: error: " + msg)
     sys.exit(1)
 
+def is_value_list(key):
+    for option in options:
+        if option.name == key and option.desc.startswith('List of'):
+            return True
+    return False
 
 if '--help' in sys.argv or '-h' in sys.argv:
     print('Usage: ./configure [options]')
@@ -295,6 +299,8 @@ def set(key, value, config):
     parts = key.split('.')
     for i, part in enumerate(parts):
         if i == len(parts) - 1:
+            if is_value_list(part) and isinstance(value, str):
+                value = value.split(',')
             arr[part] = value
         else:
             if part not in arr: