FAQ
I have built python 1.5.1 from source for an embedded ARM9 debian
linux Sarge distribution but
ctypes doesn't build. Anybody have any idea what the problem is? Do
I have to have the libffi package
installed.
See my errors below.
I looked and ffi.h exists in three places

/usr/local/src/Python-2.5.1/Modules/_ctypes/libffi_arm_wince/ffi.h
/usr/local/src/Python-2.5.1/Modules/_ctypes/libffi_msvc/ffi.h
/usr/local/src/Python-2.5.1/build/temp.linux-armv4l-2.5/libffi/
include/ffi.h


with two different definitions for ffi_closure
typedef struct {
char tramp[FFI_TRAMPOLINE_SIZE];
ffi_cif *cif;
void (*fun)(ffi_cif*,void*,void**,void*);
void *user_data;
} ffi_closure __attribute__((aligned (8)));

typedef struct {
char tramp[FFI_TRAMPOLINE_SIZE];
ffi_cif *cif;
void (*fun)(ffi_cif*,void*,void**,void*);
void *user_data;
} ffi_closure;

is the __attribute__ syntax causing a problem


building '_ctypes' extension
gcc -pthread -fno-strict-aliasing -DNDEBUG -g -O3 -Wall -Wstrict-
prototypes -fPIC -I. -I/usr/local/src/Python-2.5.1/./Include -Ibuild/
temp.linux-armv4l-2.5/libffi/include -Ibuild/temp.linux-armv4l-2.5/
libffi -I/usr/local/src/Python-2.5.1/Modules/_ctypes/libffi/src -I./
Include -I. -I/usr/local/include -I/usr/local/src/Python-2.5.1/
Include -I/usr/local/src/Python-2.5.1 -c /usr/local/src/Python-2.5.1/
Modules/_ctypes/_ctypes.c -o build/temp.linux-armv4l-2.5/usr/local/
src/Python-2.5.1/Modules/_ctypes/_ctypes.o
In file included from /usr/local/src/Python-2.5.1/Modules/_ctypes/
_ctypes.c:126:
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:71: error:
syntax error before "ffi_closure"
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:71: warning: no
semicolon at end of struct or union
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:78: error:
syntax error before '}' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:78: warning:
type defaults to `int' in declaration of `ffi_info'
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:78: warning:
data definition has no type or storage class
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:94: error:
syntax error before "ffi_info"
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:94: warning: no
semicolon at end of struct or union
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:101: error:
conflicting types for `restype'
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:76: error:
previous declaration of `restype'
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:109: error:
syntax error before '}' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:109: warning:
type defaults to `int' in declaration of `CFuncPtrObject'
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:109: warning:
data definition has no type or storage class
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:165: error:
syntax error before '*' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:168: warning:
type defaults to `int' in declaration of `AllocFunctionCallback'
/usr/local/src/Python-2.5.1/Modules/_ctypes/ctypes.h:168: warning:
data definition has no type or storage class
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`c_void_p_from_param':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:1330: error:
`func' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:1330: error:
(Each undeclared identifier is reported only once
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:1330: error:
for each function it appears in.)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:1331: error:
syntax error before ')' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: At top level:
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2470: error:
syntax error before '*' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2471: warning:
function declaration isn't a prototype
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`CFuncPtr_set_errcheck':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2472: error:
`ob' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2477: error:
`self' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: At top level:
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2484: error:
syntax error before '*' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2485: warning:
function declaration isn't a prototype
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`CFuncPtr_get_errcheck':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2486: error:
`self' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: At top level:
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2495: error:
syntax error before '*' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2496: warning:
function declaration isn't a prototype
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`CFuncPtr_set_restype':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2497: error:
`ob' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2498: error:
`self' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: At top level:
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2520: error:
syntax error before '*' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2521: warning:
function declaration isn't a prototype
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`CFuncPtr_get_restype':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2523: error:
`self' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: At top level:
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2539: error:
syntax error before '*' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2540: warning:
function declaration isn't a prototype
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`CFuncPtr_set_argtypes':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2543: error:
`ob' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2544: error:
`self' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: At top level:
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2562: error:
syntax error before '*' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2563: warning:
function declaration isn't a prototype
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`CFuncPtr_get_argtypes':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2565: error:
`self' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`CFuncPtr_FromDll':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2747: error:
`self' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2802: error:
syntax error before ')' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`CFuncPtr_new':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2867: error:
`self' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2870: error:
`thunk' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:2939: error:
syntax error before ')' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: At top level:
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3040: error:
syntax error before '*' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3043: warning:
function declaration isn't a prototype
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`_build_callargs':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3044: error:
`self' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3054: error:
`poutmask' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3055: error:
`pinoutmask' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3056: error:
`pnumretvals' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3064: error:
`inargs' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3113: error:
`kwds' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: At top level:
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3268: error:
syntax error before '*' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3269: warning:
function declaration isn't a prototype
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`CFuncPtr_call':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3274: error:
`self' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3329: error:
`inargs' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3329: error:
`kwds' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: At top level:
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3398: error:
syntax error before '*' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3399: warning:
function declaration isn't a prototype
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`CFuncPtr_traverse':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3400: error:
`self' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3400: warning:
implicit declaration of function `visit'
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3400: error:
`arg' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3407: error:
`visit' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: At top level:
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3411: error:
syntax error before '*' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3412: warning:
function declaration isn't a prototype
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`CFuncPtr_clear':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3413: error:
`self' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: At top level:
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3431: error:
syntax error before '*' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3432: warning:
function declaration isn't a prototype
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`CFuncPtr_dealloc':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3433: error:
`self' undeclared (first use in this function)
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: At top level:
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3438: error:
syntax error before '*' token
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3439: warning:
function declaration isn't a prototype
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c: In function
`CFuncPtr_repr':
/usr/local/src/Python-2.5.1/Modules/_ctypes/_ctypes.c:3448: error:
`self' undeclared (first use in this function)




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Samuel M. Smith Ph.D.
2966 Fort Hill Road
Eagle Mountain, Utah 84005-4108
801-768-2768 voice
801-768-2769 fax
**********************************************************************
"The greatest source of failure and unhappiness in the world is
giving up what we want most for what we want at the moment"
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postedOct 26, '07 at 5:16p
activeOct 26, '07 at 5:16p
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