fix test suite reducing the signal-to-noise ratio of GCC warnings

tests/compile/arrayptrcompat.pyx

@@ -5,8 +5,8 @@ cdef void f():
     cdef int *p
     cdef void *v
     cdef int a[5]
-    cdef int i
-    cdef E e
+    cdef int i=0
+    cdef E e=z
     p = a
     v = a
     p = a + i
@@ -15,3 +15,5 @@ cdef void f():
     p = e + a
     p = a - i
     p = a - e
+
+f()

tests/compile/arraytoptrarg.pyx

@@ -4,3 +4,4 @@ cdef void f1(char *argv[]):
 cdef void f2(char *argv[]):
     pass
 
+f1(NULL)

tests/compile/ass2longlong.pyx

@@ -6,3 +6,5 @@ cdef void spam():
     x = L
     U = x
     x = U
+
+spam()

tests/compile/behnel4.pyx

@@ -2,4 +2,6 @@ cdef enum E:
     spam, eggs
 
 cdef E f() except spam:
-    pass
+    return eggs
+
+f()

tests/compile/belchenko1.pyx

@@ -3,3 +3,5 @@ cdef extern from *:
 
 cdef int _is_aligned(void *ptr):
     return ((<intptr_t>ptr) & ((sizeof(int))-1)) == 0
+
+_is_aligned(NULL)

tests/compile/builtinfuncs.pyx

@@ -21,3 +21,5 @@ cdef int f() except -1:
     #i = typecheck(x, y)
     #i = issubtype(x, y)
     x = abs
+
+f()

tests/compile/cascmp.pyx

 cdef void foo():
-    cdef int bool, int1, int2, int3, int4
+    cdef int bool, int1=0, int2=0, int3=0, int4=0
     cdef object obj1, obj2, obj3, obj4
     obj1 = 1
     obj2 = 2
@@ -11,3 +11,5 @@ cdef void foo():
     bool = obj1 < 2 < 3
     bool = obj1 < 2 < 3 < 4
     bool = int1 < (int2 == int3) < int4
+
+foo()

tests/compile/cassign.pyx

 cdef void foo():
-    cdef int i1, i2
-    cdef char c1, c2
-    cdef char *p1, *p2
+    cdef int i1, i2=0
+    cdef char c1=0, c2
+    cdef char *p1, *p2=NULL
     i1 = i2
     i1 = c1
     p1 = p2
@@ -9,4 +9,5 @@ cdef void foo():
     i1 = obj1
     p1 = obj1	
     p1 = "spanish inquisition"
-    
\ No newline at end of file
+
+foo()    

tests/compile/casttoexttype.pyx

@@ -7,3 +7,5 @@ cdef void foo(object x):
 cdef void blarg(void *y, object z):
     foo(<Spam>y)
     foo(<Spam>z)
+
+blarg(<void*>None, None)

tests/compile/cenum.pyx

@@ -5,9 +5,10 @@ cdef enum Spam:
     g = 42
 
 cdef void eggs():
-    cdef Spam s1, s2
+    cdef Spam s1, s2=a
     cdef int i
     s1 = s2
     s1 = c
     i = s1
-    
\ No newline at end of file
+
+eggs()    

tests/compile/cnumop.pyx

 def f():
-    cdef int int1, int2, int3
-    cdef char char1
-    cdef long long1, long2
-    cdef float float1, float2
+    cdef int int1, int2=0, int3=1
+    cdef char char1=0
+    cdef long long1, long2=0
+    cdef float float1, float2=0
     cdef double double1
     int1 = int2 * int3
     int1 = int2 / int3
     long1 = long2 * char1
     float1 = int1 * float2
     double1 = float1 * int2
+
+f()

tests/compile/coercearraytoptr.pyx

@@ -8,3 +8,5 @@ cdef void eggs():
     cdef Grail grail
     spam(silly)
     spam(grail.silly)
+
+eggs()

tests/compile/coercetovoidptr.pyx

 cdef void f():
     cdef void *p
-    cdef char *q
+    cdef char *q=NULL
     p = q
 
+f()

tests/compile/complexbasetype.pyx

 cdef extern (int *[42]) spam, grail, swallow
 
 cdef (int (*)()) brian():
-    pass
+    return NULL
+
+brian()

tests/compile/cstructreturn.pyx

@@ -3,3 +3,5 @@ ctypedef struct Foo:
 
 cdef Foo f():
     blarg = 1 + 2
+
+f()

tests/compile/cunsignedlong.pyx

 cdef void f():
     cdef unsigned long x
-    cdef object y
+    cdef object y=0
     x = y
     y = x
+
+f()

tests/compile/declarations.pyx

@@ -12,9 +12,12 @@ cdef extern char *(*cpapfn())[5]
 cdef extern int fnargfn(int ())
 
 cdef void f():
-    cdef void *p
+    cdef void *p=NULL
     global ifnp, cpa
     ifnp = <int (*)()>p
 
 cdef char *g():
     pass
+
+f()
+g()

tests/compile/delslice.pyx

 cdef void spam():
     cdef object x
     del x[17:42]
+
+spam()

tests/compile/doda1.pyx

@@ -9,3 +9,5 @@ cdef Spam foo():
 
 cdef object blarg():
     pass
+
+foo()

tests/compile/emptytry.pyx

@@ -3,3 +3,5 @@ cdef void f():
         pass
     finally:
         pass
+
+f()

tests/compile/enumintcompat.pyx

@@ -5,10 +5,10 @@ cdef enum G:
     b
 
 cdef void f():
-    cdef E e
-    cdef G g
-    cdef int i, j
-    cdef float f, h
+    cdef E e=a
+    cdef G g=b
+    cdef int i, j=0
+    cdef float f, h=0
     i = j | e
     i = e | j
     i = j ^ e
@@ -23,3 +23,5 @@ cdef void f():
     # f = j ** e # Cython prohibits this
     i = e + g
     f = h
+
+f()

tests/compile/eqcmp.pyx

 cdef void foo():
-    cdef int bool, int1, int2
-    cdef float float1, float2
-    cdef char *ptr1, *ptr2
+    cdef int bool, int1=0, int2=0
+    cdef float float1=0, float2=0
+    cdef char *ptr1=NULL, *ptr2=NULL
     cdef int *ptr3
     bool = int1 == int2
     bool = int1 != int2
@@ -10,4 +10,5 @@ cdef void foo():
     bool = int1 == float2
     bool = ptr1 is ptr2
     bool = ptr1 is not ptr2
-    
\ No newline at end of file
+
+foo()

tests/compile/ewing1.pyx

@@ -2,7 +2,9 @@ cdef int blarg(int i):
     pass
 
 cdef void foo():
-    cdef float f
+    cdef float f=0
     cdef int i
     if blarg(<int> f):
         pass
+
+foo()

tests/compile/ewing4.pyx

 cdef void f():
     "This is a pseudo doc string."
+
+f()

tests/compile/ewing5.pyx

 cdef char *f():
     raise Exception
+
+f()

tests/compile/ewing6.pyx

@@ -19,3 +19,5 @@ cdef class E:
 
 cdef void f(D d, E e):
     d.m(e)
+
+f(D(),E())

tests/compile/excvalcheck.pyx

@@ -9,3 +9,4 @@ cdef void eggs():
     grail()
     p = tomato()
 
+eggs()

tests/compile/excvaldecl.pyx

@@ -15,3 +15,10 @@ cdef int brian() except? 0:
 
 cdef int silly() except -1:
     pass
+
+spam()
+eggs()
+grail()
+tomato()
+brian()
+silly()

tests/compile/excvalreturn.pyx

 cdef int spam() except -1:
     eggs = 42
 
+spam()

tests/compile/extcmethcall.pyx

@@ -16,3 +16,5 @@ cdef void tomato():
     spam = superspam
     spam.add_tons(42)
     superspam.add_tons(1764)
+
+tomato()

tests/compile/extern.pyx

@@ -7,3 +7,5 @@ cdef extern int eggs():
 
 cdef int grail():
     pass
+
+grail()

tests/compile/forfromelse.pyx

 cdef void spam():
-    cdef int i, j, k
+    cdef int i, j=0, k=0
     for i from 0 <= i < 10:
         j = k
     else:
@@ -10,3 +10,5 @@ cdef void spam():
         j = i
     else:
         j = k
+
+spam()

tests/compile/gustafsson2.pyx

@@ -6,4 +6,5 @@ cdef somefunction(someenum_t val):
     if val == ENUMVALUE_1:
         pass
 
-
+somefunction(ENUMVALUE_1)
+somefunction(ENUMVALUE_2)

tests/compile/huss2.pyx

@@ -13,3 +13,5 @@ cdef void f():
     e = white
     i = e
     i = e + 1
+
+f()

tests/compile/ia_cdefblock.pyx

@@ -31,3 +31,5 @@ cdef public api:
 
     void pub_api_f():
         pass
+
+priv_f()

tests/compile/index.pyx

 def f(obj1, obj2, obj3):
-    cdef int int1, int2, int3
-    cdef float flt1, *ptr1
+    cdef int int1, int2=0, int3=0
+    cdef float flt1, *ptr1=NULL
     cdef int array1[42]
+    array1[int2] = 0
     int1 = array1[int2]
     flt1 = ptr1[int2]
     array1[int1] = int2
@@ -13,4 +14,5 @@ def f(obj1, obj2, obj3):
     array1[obj2] = int3
     obj1[int2] = obj3
     obj1[obj2] = 42
-    
\ No newline at end of file
+    
+f(None, None, None)

tests/compile/ishimoto4.pyx

 cdef void __stdcall f():
     pass
+
+f()

tests/compile/jiba5.pyx

 def f():
-    cdef int i
+    cdef int i=0
     global mylist
     del mylist[i]
     return

tests/compile/jiba6.pyx

@@ -6,3 +6,5 @@ cdef void f():
     cdef float* f2
     f2 = f1 + 1
     memcpy(f1, f2, 1)
+
+f()

tests/compile/johnson1.pyx

@@ -5,3 +5,5 @@ cdef void func():
     cdef foo x
     map = [FOO]
     x = map[0]
+
+func()

tests/compile/khavkine1.pyx

@@ -7,3 +7,4 @@ cdef void f(void *obj):
     (<T> obj).a[0] = 1
 
 b = None
+f(NULL)

tests/compile/kleckner1.pyx

@@ -3,3 +3,5 @@ def f(x,):
 
 cdef void g(int x,):
     pass
+
+g(0)

tests/compile/magcmp.pyx

 cdef void foo():
-    cdef int bool, int1, int2
+    cdef int bool, int1=0, int2=0
     bool = int1 < int2
     bool = int1 > int2
     bool = int1 <= int2
     bool = int1 >= int2
-    
-    
+
+foo()

tests/compile/nogil.pyx

@@ -10,9 +10,12 @@ cdef void f(int x) nogil:
         y = 42
 
 cdef void h(object x) nogil:
-        cdef void *p
+        cdef void *p=<void*>None
         g2(x)
         g2(<object>p)
         p = <void *>x
         e1()
         e2()
+
+f(0)
+h(None)

tests/compile/none.pyx

 cdef void spam():
     eggs = None
 
+spam()

tests/compile/typecast.pyx

 cdef void f(obj):
-    cdef int i
+    cdef int i=0
     cdef char *p
     p = <char *>i
     obj = <object>p
     p = <char *>obj
-    
\ No newline at end of file
+
+f(None)