README.UPDATING: emphasise more the LDAP issue

[exim.git] / src / OS / os.h-Linux

diff --git a/src/OS/os.h-Linux b/src/OS/os.h-Linux
index bde5dd7105087b77e7005023323f648ec618b185..5186ec89dde44f645efa85bf55ae03954ed24b8a 100644 (file)
--- a/src/OS/os.h-Linux
+++ b/src/OS/os.h-Linux
@@ -1,7 +1,12 @@
-/* $Cambridge: exim/src/OS/os.h-Linux,v 1.7 2007/10/04 13:28:06 tom Exp $ */
-
 /* Exim: OS-specific C header file for Linux */
 
+/* Some weird variants may require invocation with C99 and features.h
+inclusion to build, with the 64-bit arithmetic. Make compiler selection
+their problem, but build anyway. */
+
+#include <features.h>
+
+
 #define CRYPT_H
 #define GLIBC_IP_OPTIONS
 #define HAVE_MMAP
@@ -10,10 +15,10 @@
 #define NO_IP_VAR_H
 #define SIG_IGN_WORKS
 
-/* When using the experimental Domainkeys/DKIM extensions, 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. */
+/* 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 */