hsc2hs trouble with floating-point constants in cross-compilation mode

Split off from #7983.

GCC 4.6 rejects some uses of floating-point constants in the declaration of a local static array. From ticket:7983#comment:109626:

This is caused by a regression in GCC from gcc-4.4 to gcc-4.6: ​https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46028

$ cat Test_hsc_test0.c
void _hsc2hs_test1()
{
static int test_array[(89.) > 0 ? 2 : 1];
}

$ /usr/bin/gcc-4.4 -c ./Test_hsc_test0.c

$ /usr/bin/gcc-4.6 -c ./Test_hsc_test0.c
./Test_hsc_test0.c: In function ‘_hsc2hs_test1’:
./Test_hsc_test0.c:3:16: error: storage size of ‘test_array’ isn’t constant

This means that (if your C compiler is affected by this issue) hsc2hs can't handle

(#const 89.)

in cross-compilation mode.

Trac metadata

Trac field	Value
Version	7.8.4
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	hsc2hs
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture