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/* Exim: OS-specific C header file for Linux */
/* Some old systems we've received bug-reports for have a <limits.h> which
does not pull in <features.h>. Best to just pull it in now and have done
with the issue. */
#include <features.h>
#define CRYPT_H
#define GLIBC_IP_OPTIONS
#define HAVE_MMAP
#define HAVE_BSD_GETLOADAVG
#define HAVE_SYS_STATVFS_H
#define NO_IP_VAR_H
#define SIG_IGN_WORKS
/* When using the DKIM, setting HAVE_LINUX_SENDFILE can increase
performance on outgoing mail a bit. Note: With older glibc versions
this setting will conflict with the _FILE_OFFSET_BITS=64 setting
defined as part of the Linux CFLAGS. */
/* #define HAVE_LINUX_SENDFILE */
#define F_FREESP O_TRUNC
typedef struct flock flock_t;
#define os_strsignal strsignal
#define OS_STRSIGNAL
#if defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__NetBSD_kernel__)
#define SIOCGIFCONF_GIVES_ADDR
#define HAVE_SYS_MOUNT_H
#endif
#if defined(__linux__)
/* Some versions of Linux need explicit sync-ing of directories as well as
files. This setting requests that. If the directory is on NFS, it may not
be possible to sync it - in that case, Exim now should ignore the error. But
if you have problems in that area, try undefining this. But be aware that you
may be in a situation where files are not being properly "committed to stable
storage" as quickly as Exim thinks they are. */
#define NEED_SYNC_DIRECTORY
#define os_find_running_interfaces os_find_running_interfaces_linux
/* Need a prototype for the Linux-specific function. The structure hasn't
been defined yet, so we need to pre-declare it. */
struct ip_address_item;
extern struct ip_address_item *os_find_running_interfaces_linux(void);
#endif /* __linux__ */
/* Some folks running "unusual" setups with very old libc environments have
found that _GNU_SOURCE=1 before <features.h> is not sufficient to define some
constants needed for 64-bit arithmetic. If you encounter build errors based
on LLONG_MIN being undefined and various other escape hatches have not helped,
then change the 0 to 1 in the next block. */
#if 0
# define LLONG_MIN LONG_LONG_MIN
# define LLONG_MAX LONG_LONG_MAX
#endif
#if _POSIX_C_SOURCE >= 200809L || _ATFILE_SOUCE
# define EXIM_HAVE_OPENAT
#endif
/* End */
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