X-Git-Url: https://git.exim.org/exim.git/blobdiff_plain/a8530a10756ff71d0c5f4b010d467cb145cfe0fd..f10e2052dc60814e241eda952149459674906cdf:/src/OS/os.h-Linux diff --git a/src/OS/os.h-Linux b/src/OS/os.h-Linux index 5b731eaa1..510865c66 100644 --- a/src/OS/os.h-Linux +++ b/src/OS/os.h-Linux @@ -1,16 +1,27 @@ -/* $Cambridge: exim/src/OS/os.h-Linux,v 1.4 2006/10/30 22:06:33 tom Exp $ */ - /* Exim: OS-specific C header file for Linux */ +/* Some old systems we've received bug-reports for have a which +does not pull in . Best to just pull it in now and have done +with the issue. */ + +#include + + #define CRYPT_H #define GLIBC_IP_OPTIONS #define HAVE_MMAP #define HAVE_BSD_GETLOADAVG #define HAVE_SYS_STATVFS_H -#define HAVE_LINUX_SENDFILE #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; @@ -33,9 +44,6 @@ storage" as quickly as Exim thinks they are. */ #define NEED_SYNC_DIRECTORY -/* Other OS have "const" in here */ -#define ICONV_ARG2_TYPE char ** - #define os_find_running_interfaces os_find_running_interfaces_linux /* Need a prototype for the Linux-specific function. The structure hasn't @@ -46,4 +54,24 @@ 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 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 + +#if defined(TCP_FASTOPEN) && !defined(MSG_FASTOPEN) +# define MSG_FASTOPEN 0x20000000 +#endif + + /* End */