1 files changed, 69 insertions, 0 deletions
diff --git a/src/boost/tools/build/test/pch.py b/src/boost/tools/build/test/pch.py
new file mode 100644
index 000000000..fe6c792f3
--- /dev/null
+++ b/src/boost/tools/build/test/pch.py
@@ -0,0 +1,69 @@
+#!/usr/bin/python
+
+# Copyright 2006 Vladimir Prus.
+# Copyright Nikita Kniazev 2020.
+# Distributed under the Boost Software License, Version 1.0. (See
+# accompanying file LICENSE.txt or copy at
+# https://www.bfgroup.xyz/b2/LICENSE.txt)
+
+import BoostBuild
+from time import sleep
+
+
+t = BoostBuild.Tester()
+
+t.write("jamroot.jam", """
+import pch ;
+project : requirements <warnings-as-errors>on ;
+cpp-pch pch : pch.hpp ;
+cpp-pch pch-afx : pch.hpp : <define>HELLO ;
+cpp-pch pch-msvc-source : pch.hpp : <toolset>msvc:<source>pch.cpp ;
+exe hello : hello.cpp pch ;
+exe hello-afx : hello-afx.cpp pch-afx : <define>HELLO ;
+exe hello-msvc-source : hello-msvc-source.cpp pch-msvc-source ;
+""")
+
+pch_content = """\
+#undef HELLO
+class TestClass
+{
+public:
+    TestClass( int, int ) {}
+};
+"""
+t.write("pch.hpp", pch_content)
+
+t.write("pch.cpp", """#include <pch.hpp>
+""")
+
+toolset = BoostBuild.get_toolset()
+for name in ("hello.cpp", "hello-afx.cpp", "hello-msvc-source.cpp"):
+    t.write(name, """int main() { TestClass c(1, 2); }
+""")
+
+t.run_build_system()
+t.expect_addition("bin/$toolset/debug*/hello.exe")
+t.expect_addition("bin/$toolset/debug*/hello-afx.exe")
+t.expect_addition("bin/$toolset/debug*/hello-msvc-source.exe")
+
+
+# Now make the header unusable, replace its content with some garbage, but
+# preserve the size and timestamp to fool the compiler. If everything is OK,
+# B2 will not recreate PCH, and compiler will happily use pre-compiled
+# header, not noticing that the real header is bad.
+
+t.rename("pch.hpp", "pch.hpp.orig")
+s = "THIS WILL NOT COMPILE. "
+t.write("pch.hpp", s + (len(pch_content) - len(s)) * 'x')
+t.copy_timestamp("pch.hpp.orig", "pch.hpp")
+
+t.rm("bin/$toolset/debug*/hello.obj")
+t.rm("bin/$toolset/debug*/hello-afx.obj")
+t.rm("bin/$toolset/debug*/hello-msvc-source.obj")
+
+t.run_build_system()
+t.expect_addition("bin/$toolset/debug*/hello.obj")
+t.expect_addition("bin/$toolset/debug*/hello-afx.obj")
+t.expect_addition("bin/$toolset/debug*/hello-msvc-source.obj")
+
+t.cleanup()