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bpo-27643 - skip test_ctypes test case with XLC compiler. (GH-5164) 

This test case needs "signed short" bitfields, but the
IBM XLC compiler (on AIX) does not support this.

Skip the code and test when AIX and XLC are used.

Use __xlc__ as identifier to detect the XLC compiler.
This commit is contained in:
Michael Felt 2018-12-26 04:54:22 +01:00 committed by Nick Coghlan
parent 5661459f5f
commit 22462da70c
3 changed files with 23 additions and 4 deletions
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4
Lib/ctypes/test/test_bitfields.py
View File

@ -40,6 +40,10 @@ class C_Test(unittest.TestCase):
self.assertEqual(getattr(b, name), func(byref(b), name.encode('ascii')))
def test_shorts(self):
b = BITS()
name = "M"
if func(byref(b), name.encode('ascii')) == 999:
self.skipTest("Compiler does not support signed short bitfields")
for i in range(256):
for name in "MNOPQRS":
b = BITS()

5
Misc/NEWS.d/next/Tests/2018-01-12-09-05-19.bpo-27643._6z49y.rst Normal file
View File

@ -0,0 +1,5 @@
Test_C test case needs "signed short" bitfields, but the
IBM XLC compiler (on AIX) does not support this
Skip the code and test when AIX and XLC are used
Applicable to Python2-2.7 and later

16
Modules/_ctypes/_ctypes_test.c
View File

@ -414,8 +414,15 @@ EXPORT(long long) last_tf_arg_s = 0;
EXPORT(unsigned long long) last_tf_arg_u = 0;
struct BITS {
int A: 1, B:2, C:3, D:4, E: 5, F: 6, G: 7, H: 8, I: 9;
signed int A: 1, B:2, C:3, D:4, E: 5, F: 6, G: 7, H: 8, I: 9;
/*
* The test case needs/uses "signed short" bitfields, but the
* IBM XLC compiler does not support this
*/
#ifndef __xlc__
#define SIGNED_SHORT_BITFIELDS
short M: 1, N: 2, O: 3, P: 4, Q: 5, R: 6, S: 7;
#endif
};
EXPORT(void) set_bitfields(struct BITS *bits, char name, int value)
@ -430,7 +437,7 @@ EXPORT(void) set_bitfields(struct BITS *bits, char name, int value)
case 'G': bits->G = value; break;
case 'H': bits->H = value; break;
case 'I': bits->I = value; break;
#ifdef SIGNED_SHORT_BITFIELDS
case 'M': bits->M = value; break;
case 'N': bits->N = value; break;
case 'O': bits->O = value; break;
@ -438,6 +445,7 @@ EXPORT(void) set_bitfields(struct BITS *bits, char name, int value)
case 'Q': bits->Q = value; break;
case 'R': bits->R = value; break;
case 'S': bits->S = value; break;
#endif
}
}
@ -454,6 +462,7 @@ EXPORT(int) unpack_bitfields(struct BITS *bits, char name)
case 'H': return bits->H;
case 'I': return bits->I;
#ifdef SIGNED_SHORT_BITFIELDS
case 'M': return bits->M;
case 'N': return bits->N;
case 'O': return bits->O;
@ -461,8 +470,9 @@ EXPORT(int) unpack_bitfields(struct BITS *bits, char name)
case 'Q': return bits->Q;
case 'R': return bits->R;
case 'S': return bits->S;
#endif
}
return 0;
return 999;
}
static PyMethodDef module_methods[] = {