Scons Environment() strange behavior - environment

Question

I am playing around with scons build . When i use the following to import my system path :
env = Environment(ENV={'PATH' : os.environ['PATH']})
assuming i am using gcc compiler , the path is set in C:\cygwin\bin
The above work perfectly , however if I try to split them :
ENV={'PATH' : os.environ['PATH']}
env=Environment(ENV)
The below error show that the path is not added correctly ...
g++: error: /Fomaino.obj: No such file or director
g++: error: /c: No such file or directory
g++: error: /I.: No such file or directory
It does not work ? I have even try the following :
env=Environment()
env['PATH']= os.environ['PATH']
same error
g++: error: /Fomaino.obj: No such file or director
g++: error: /c: No such file or directory
g++: error: /I.: No such file or directory
I try to use the following in SCONS user guide
env['ENV']['PATH'] = 'C:/cygwin/bin'
also fails.
I already have an working approach , but i am curious why the other two approach fails which i think in term of logic they are the same... or I am wrong...

Answer 1

Any additional SCons Environment variables that you want to be set in the Environment should be passed as keyword arguments to the Environment constructor:
Environment(VAR=VALUE)
From the SCons Users Guide:
Environment([key=value, ...]) , env.Environment([key=value, ...])
Return a new construction environment initialized with the specified
key=value pairs.