source: downloads/boost_1_34_1/tools/build/v2/test/pch.py @ 32

#!/usr/bin/python

#  Copyright 2006 Vladimir Prus.
#  Distributed under the Boost Software License, Version 1.0. (See
#  accompanying file LICENSE_1_0.txt or copy at
#  http://www.boost.org/LICENSE_1_0.txt)

from BoostBuild import Tester, List
import string
import os

t = Tester()

t.write("Jamroot", """

import pch ;

cpp-pch pch : pch.hpp : <toolset>msvc:<source>pch.cpp <include>. ;

exe hello : hello.cpp pch : <include>. ; 
""")

t.write("pch.hpp.bad", """ 
THIS WON'T COMPILE 
""")

# Note that pch.hpp is written after pch.hpp.bad, so its timestamp won't
# be less than timestamp of pch.hpp.bad.
t.write("pch.hpp", """ 
class TestClass {
public:
    TestClass(int, int) {}
};

""")



t.write("pch.cpp", """ #include <pch.hpp>

""")

t.write("hello.cpp", """ #include <pch.hpp>

int main()
{
  TestClass c(1, 2);    
  return 0;
}

""")

t.run_build_system()

t.expect_addition("bin/$toolset/debug/hello.exe")

# Now make the header unusable, without changing timestamp.
# If everything is OK, Boost.Build won't recreate PCH, and
# compiler will happily use pre-compiled header, not noticing
# that the real header is bad.

t.copy_preserving_timestamp("pch.hpp.bad", "pch.hpp")

t.rm("bin/$toolset/debug/hello.obj")

t.run_build_system()
t.expect_addition("bin/$toolset/debug/hello.obj")

t.cleanup()