Fix adding a prefix when the target isn't specified.

2 files changed, 7 insertions, 1 deletions

diff --git a/src/engine/SCons/Builder.py b/src/engine/SCons/Builder.py
index 8de58c8..ed2b767 100644
--- a/src/engine/SCons/Builder.py
+++ b/src/engine/SCons/Builder.py
@@ -289,7 +289,7 @@ class BuilderBase:
             s = source[0]
             if isinstance(s, SCons.Node.Node):
                 s = os.path.split(str(s))[1]
-            target = [ os.path.splitext(s)[0] + suf ]
+            target = [ pre + os.path.splitext(s)[0] + suf ]
         else:
             target = adjustixes(target, pre, suf)
 
diff --git a/src/engine/SCons/BuilderTests.py b/src/engine/SCons/BuilderTests.py
index 11674d6..8b9bd94 100644
--- a/src/engine/SCons/BuilderTests.py
+++ b/src/engine/SCons/BuilderTests.py
@@ -323,6 +323,9 @@ class BuilderTestCase(unittest.TestCase):
         tgt = builder(env, target = 'tgt2a tgt2b', source = 'src2')
         assert tgt.path == 'libtgt2a tgt2b', \
                 "Target has unexpected name: %s" % tgt.path
+        tgt = builder(env, source = 'src3')
+        assert tgt.path == 'libsrc3', \
+                "Target has unexpected name: %s" % tgt.path
 
     def test_src_suffix(self):
         """Test Builder creation with a specified source file suffix
@@ -377,6 +380,9 @@ class BuilderTestCase(unittest.TestCase):
         tgt = builder(env, target = 'tgt4a tgt4b', source = 'src4')
         assert tgt.path == 'tgt4a tgt4b.o', \
                 "Target has unexpected name: %s" % tgt.path
+        tgt = builder(env, source = 'src5')
+        assert tgt.path == 'src5.o', \
+                "Target has unexpected name: %s" % tgt.path
 
     def test_ListBuilder(self):
         """Testing ListBuilder class."""