GYP default value for variable % - build

Question

i'm trying to play around with GYP and got stucked with defining "default variable"
have 2 files(one main, and one expected to store common data, included to main:
1) v_common.gypi:
{
'variables': {
'mymodule%': "blblblb",
'mymoduleLibs' : "<(mymodule)/Libs",
},
'target_defaults': {
},
}
2) mymodule.gyp
{
'variables':{
},
'includes': [
'v_common.gypi',
], # includes
'targets': [
{
'target_name': 'myModule',
'type': 'none',
'actions' : [
{
'action_name': 'create_libs_folder',
'inputs': ['one_file'],
'outputs':['blabla'],
'action': ['mkdir', '<(mymoduleLibs)'],
}
]
},
], # targets
}
per my expectations:
mymodule should get value of "blblblb", (as far as it wasn't defined previously anywhere),
then I should be able to use it for compute value of mymoduleLibs
and after all mymoduleLibs should be usable in mymodule.gyp
but, i just getting error that mymodule is "Undefined variable". If I do exact definition of mymodyle like in example below(withot percent sign), everything works fine. :
'variables': {
'mymodule': "blblblb",
'mymoduleLibs' : "<(mymodule)/Libs",
}
any ideas?

Answer 1

i've found issue. it's described here https://groups.google.com/forum/?fromgroups#!topicsearchin/gyp-developer/default/gyp-developer/1EWXAXe-qWs
correct workaroud is to define default variables in sub-dict 'variables':{...}, so they will be evaluated before expanding other variables, like below:
{
'variables': {
'variables': {
'mymodule%': "blblblb",
},
'mymoduleLibs' : "<(mymodule)/Libs",
},
'target_defaults': {
},
}