env.Clone() - CXXFLAGS etc. not copied when "tools" parameter passed

[bdbaddog]

This issue was originally created at: 2012-11-23 12:56:47. This issue was reported by: ang3lus. ang3lus said at 2012-11-23 12:56:47

env = Environment(
    CXX=cxx,
    CXXFLAGS = cxx_flags,
    LINKFLAGS = link_flags,
    CPPPATH=include_dirs,
    LIBPATH=lib_paths,
)
 
print env['CXXFLAGS']
 
...
 
test_env = env.Clone(tools=['default', 'cxxtest'])
 
print test_env['CXXFLAGS']

Output:

scons: Reading SConscript files ...
**** Compiling in release mode...
-std=c++11 -stdlib=libc++ -O2 `pkg-config --cflags-only-I freetype2`
Loading CxxTest tool...
<------ here is the print test_env['CXXFLAGS']
scons: done reading SConscript files.
scons: Building targets ...
scons: `.' is up to date.
scons: done building targets.

The problem: When the "tools" parameter is passed to the "Clone" method not all variables are copied.

Environment: python 3.3

[mwichmann]

Presuming the story is if a tools arg is specified, a poorly behaved mytool.generate() will re-initialize certain variables, not keeping existing values.