New submission from Nick Coghlan <ncogh...@gmail.com>:
I'm hitting a build failure relating to the new _uuid module on Fedora 27:
==============
building '_uuid' extension
gcc -pthread -fPIC -Wno-unused-result -Wsign-compare -DNDEBUG -g -fwrapv -O3
-Wall -Wstrict-prototypes -std=c99 -Wextra -Wno-unused-result
-Wno-unused-parameter -Wno-missing-field-initializers
-Werror=implicit-function-declaration -I./Include -I. -I/usr/local/include
-I/home/ncoghlan/devel/cpython/Include -I/home/ncoghlan/devel/cpython -c
/home/ncoghlan/devel/cpython/Modules/_uuidmodule.c -o
build/temp.linux-x86_64-3.7/home/ncoghlan/devel/cpython/Modules/_uuidmodule.o
In file included from /home/ncoghlan/devel/cpython/Modules/_uuidmodule.c:8:0:
/usr/include/uuid.h:94:24: error: conflicting types for ‘uuid_t’
typedef struct uuid_st uuid_t;
^~~~~~
In file included from /home/ncoghlan/devel/cpython/Modules/_uuidmodule.c:5:0:
/usr/include/uuid/uuid.h:44:23: note: previous declaration of ‘uuid_t’ was here
typedef unsigned char uuid_t[16];
^~~~~~
In file included from /home/ncoghlan/devel/cpython/Modules/_uuidmodule.c:8:0:
/usr/include/uuid.h:107:22: error: conflicting types for ‘uuid_compare’
extern uuid_rc_t uuid_compare (const uuid_t *_uuid, const uuid_t
*_uuid2, int *_result);
^~~~~~~~~~~~
In file included from /home/ncoghlan/devel/cpython/Modules/_uuidmodule.c:5:0:
/usr/include/uuid/uuid.h:73:12: note: previous declaration of ‘uuid_compare’
was here
extern int uuid_compare(const uuid_t uu1, const uuid_t uu2);
^~~~~~~~~~~~
/home/ncoghlan/devel/cpython/Modules/_uuidmodule.c: In function
‘py_uuid_generate_time_safe’:
/home/ncoghlan/devel/cpython/Modules/_uuidmodule.c:15:12: error: storage size
of ‘uuid’ isn’t known
uuid_t uuid;
^~~~
/home/ncoghlan/devel/cpython/Modules/_uuidmodule.c:15:12: warning: unused
variable ‘uuid’ [-Wunused-variable]
/home/ncoghlan/devel/cpython/Modules/_uuidmodule.c:29:1: warning: control
reaches end of non-void function [-Wreturn-type]
}
^
==============
>From my initial investigation, I think the issue may be related to my previous
>attempt to fix this in
>https://github.com/python/cpython/commit/53efbf3977a44e382397e7994a2524b4f8c9d053#diff-2eeaed663bd0d25b7e608891384b7298
> and the fact that there are *two* "uuid.h" headers available in the Fedora
>repos:
* /usr/include/uuid.h (provided by uuid-devel)
* /usr/include/uuid/uuid.h (provided by libuuid-devel)
Right now, the build works if you have "libuuid-devel" installed, but do *not*
have "uuid-devel" installed.
With both installed, neither installed, or only uuid-devel installed, the build
will fail, but the exact errors reported will vary. (There's also a distinct
set of compile errors you can get if you forget to rerun configure after
installing the additional headers)
Reverting my previous commit (and replacing it with a comment saying we're
specifically looking for "uuid/uuid.h", not "uuid.h") may be enough to handle
the case where both are installed.
----------
messages: 310459
nosy: christian.heimes, ncoghlan, vstinner
priority: normal
severity: normal
stage: needs patch
status: open
title: Header dependent _uuid build failure on Fedora 27
type: compile error
versions: Python 3.7, Python 3.8
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue32627>
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