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** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1739300
Title:
The header files fcntl.h and linux/fcntl.h are incompatible
Status in glibc package in Ubuntu:
New
Status in linux package in Ubuntu:
Incomplete
Bug description:
The program try.c, below, does not compile.
Though with HAVE_ARCH_STRUCT_FLOCK and HAVE_ARCH_STRUCT_FLOCK64 defined, it
compiles.
But then fails again to compile, when _GNU_SOURCE is also defined.
I expect this to compile in all three cases.
$ cat try.c
//#define _GNU_SOURCE
//#define HAVE_ARCH_STRUCT_FLOCK
//#define HAVE_ARCH_STRUCT_FLOCK64
#include <fcntl.h>
#include <linux/fcntl.h>
int main(int argc, char *argv[]){}
$ gcc try.c
In file included from /usr/include/x86_64-linux-gnu/asm/fcntl.h:1:0,
from /usr/include/linux/fcntl.h:4,
from try.c:5:
/usr/include/asm-generic/fcntl.h:195:8: error: redefinition of ‘struct flock’
struct flock {
^~~~~
In file included from /usr/include/fcntl.h:35:0,
from try.c:4:
/usr/include/x86_64-linux-gnu/bits/fcntl.h:35:8: note: originally defined here
struct flock
^~~~~
$ gcc -DHAVE_ARCH_STRUCT_FLOCK -DHAVE_ARCH_STRUCT_FLOCK64 try.c ## this is ok
$ gcc -D_GNU_SOURCE -DHAVE_ARCH_STRUCT_FLOCK -DHAVE_ARCH_STRUCT_FLOCK64 try.c
In file included from /usr/include/x86_64-linux-gnu/asm/fcntl.h:1:0,
from /usr/include/linux/fcntl.h:4,
from try.c:5:
/usr/include/asm-generic/fcntl.h:155:8: error: redefinition of ‘struct
f_owner_ex’
struct f_owner_ex {
^~~~~~~~~~
In file included from /usr/include/x86_64-linux-gnu/bits/fcntl.h:61:0,
from /usr/include/fcntl.h:35,
from try.c:4:
/usr/include/x86_64-linux-gnu/bits/fcntl-linux.h:267:8: note: originally
defined here
struct f_owner_ex
^~~~~~~~~~
$ gcc --version | head -1
gcc (Ubuntu 7.2.0-8ubuntu3) 7.2.0
$ lsb_release -rd
Description: Ubuntu 17.10
Release: 17.10
$ dpkg -S /usr/include/x86_64-linux-gnu/bits/fcntl.h
libc6-dev:amd64: /usr/include/x86_64-linux-gnu/bits/fcntl.h
# Package: libc6-dev
# Version: 2.26-0ubuntu2
$ dpkg -S /usr/include/x86_64-linux-gnu/asm/fcntl.h
linux-libc-dev:amd64: /usr/include/x86_64-linux-gnu/asm/fcntl.h
# Package: linux-libc-dev
# Version: 4.13.0-19.22
Regards, Mike
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