New submission from Rémi Lapeyre <remi.lape...@henki.fr>:
Building master with GCC 9.3.0 gives some warnings on posix and nis:
./Modules/posixmodule.c: In function 'os_chown_impl':
./Modules/posixmodule.c:3397:39: warning: the comparison will always evaluate
as 'false' for the address of 'lchown' will never be NULL [-Waddress]
3397 | if ((!follow_symlinks) && (lchown == NULL)) {
| ^~
./Modules/posixmodule.c: In function 'PyInit_posix':
./Modules/posixmodule.c:14939:16: warning: the comparison will always evaluate
as 'false' for the address of 'lchown' will never be NULL [-Waddress]
14939 | if (lchown == NULL) {
| ^~
/Users/remi/src/cpython/Modules/nismodule.c: In function 'nis_cat':
/Users/remi/src/cpython/Modules/nismodule.c:216:18: warning: cast between
incompatible function types from 'int (*)(int, char *, int, char *, int,
struct ypcallback_data *)' to 'int (*)(long unsigned int, char *, int, char
*, int, void *)' [-Wcast-function-type]
216 | cb.foreach = (foreachfunc)nis_foreach;
| ^
/Users/remi/src/cpython/Modules/nismodule.c: In function 'nis_xdr_ypmaplist':
/Users/remi/src/cpython/Modules/nismodule.c:302:42: warning: cast between
incompatible function types from 'int (*)(XDR *, nismaplist *)' {aka 'int
(*)(struct __rpc_xdr *, struct nismaplist *)'} to 'int (*)(XDR *, void *,
unsigned int)' {aka 'int (*)(struct __rpc_xdr *, void *, unsigned int)'}
[-Wcast-function-type]
302 | sizeof(nismaplist), (xdrproc_t)nis_xdr_ypmaplist))
| ^
/Users/remi/src/cpython/Modules/nismodule.c: In function
'nis_xdr_ypresp_maplist':
/Users/remi/src/cpython/Modules/nismodule.c:328:42: warning: cast between
incompatible function types from 'int (*)(XDR *, nismaplist *)' {aka 'int
(*)(struct __rpc_xdr *, struct nismaplist *)'} to 'int (*)(XDR *, void *,
unsigned int)' {aka 'int (*)(struct __rpc_xdr *, void *, unsigned int)'}
[-Wcast-function-type]
328 | sizeof(nismaplist), (xdrproc_t)nis_xdr_ypmaplist))
| ^
In file included from
/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk/usr/include/rpc/rpc.h:76,
from /Users/remi/src/cpython/Modules/nismodule.c:17:
/Users/remi/src/cpython/Modules/nismodule.c: In function 'nisproc_maplist_2':
/Users/remi/src/cpython/Modules/nismodule.c:344:19: warning: cast between
incompatible function types from 'int (*)(XDR *, char **)' {aka 'int (*)(struct
__rpc_xdr *, char **)'} to 'int (*)(XDR *, void *, unsigned int)' {aka 'int
(*)(struct __rpc_xdr *, void *, unsigned int)'} [-Wcast-function-type]
344 | (xdrproc_t)nis_xdr_domainname, (caddr_t)argp,
| ^
/Users/remi/src/cpython/Modules/nismodule.c:345:19: warning: cast between
incompatible function types from 'int (*)(XDR *, nisresp_maplist *)' {aka 'int
(*)(struct __rpc_xdr *, struct nisresp_maplist *)'} to 'int (*)(XDR *, void *,
unsigned int)' {aka 'int (*)(struct __rpc_xdr *, void *, unsigned int)'}
[-Wcast-function-type]
345 | (xdrproc_t)nis_xdr_ypresp_maplist, (caddr_t)&res,
| ^
I'm not sure about the fix, especially for nis but I will propose a PR. There
is also some warnings concerning libffi_osx but this looks like a vendored
dependency so I left it untouched.
----------
components: Build
messages: 368146
nosy: remi.lapeyre
priority: normal
severity: normal
status: open
title: GCC 9 compiler warnings on MacOS Catalina
type: behavior
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<https://bugs.python.org/issue40516>
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