Reduce Eclipse (type) warning level

Question

I recently installed the Haskell Eclipse-plugin "EclipseFP". Everything works pretty well while there's one feature which makes me very angry hehe. I cannot reduce the warning level of the output. Eclipse/It's plugin seems to auto-append the "-Wall" flag, which is very very sensitive against type-things. Let's show this on an example:

*Main> head [1,2,3]

<interactive>:1:11:
    Warning: Defaulting the following constraint(s) to type `Integer'
               (Num a0) arising from the literal `3'
    In the expression: 3
    In the first argument of `head', namely `[1, 2, 3]'
    In the expression: head [1, 2, 3]

<interactive>:1:11:
    Warning: Defaulting the following constraint(s) to type `Integer'
               (Num a0) arising from the literal `3' at <interactive>:1:11
               (Show a0) arising from a use of `print' at <interactive>:1:1-12
    In the expression: 3
    In the first argument of `head', namely `[1, 2, 3]'
    In the expression: head [1, 2, 3]
1
*Main> 

Yep, that is REALLY annoying. It's caused by "intrinsic" functions as well as on custom ones. Another one:

factorial :: (Integral a) => a -> a
factorial 1 = 1
factorial n = n * factorial (n-1)

*Main> factorial 3

<interactive>:1:1:
    Warning: Defaulting the following constraint(s) to type `Integer'
               (Integral a0) arising from a use of `factorial'
                             at <interactive>:1:1-9
               (Num a0) arising from the literal `3' at <interactive>:1:11
    In the expression: factorial 3
    In an equation for `it': it = factorial 3

<interactive>:1:1:
    Warning: Defaulting the following constraint(s) to type `Integer'
               (Integral a0) arising from a use of `factorial'
                             at <interactive>:1:1-9
               (Num a0) arising from the literal `3' at <interactive>:1:11
               (Show a0) arising from a use of `print' at <interactive>:1:1-11
    In the expression: factorial 3
    In an equation for `it': it = factorial 3
6
*Main> 

Answer 1

I don't know about Eclipse, but you can off warnings in your .ghci file. Put

:set -Wall           -- unnecessary if Eclipse already turns it on
:set -fno-warn-type-defaults
:set -fno-warn-unused-do-bind

and whatever else you don't want to warned about by default into your ~/.ghci and reduce the warnings to the important ones. If you want to load some modules by default, you can also add import Control.Applicative (or whichever).