[exim-cvs] LLONG_MIN example in os.h-Linux

Gitweb: http://git.exim.org/exim.git/commitdiff/05ec18de4a052686f21343460824a1b88ab2129e

Commit:     05ec18de4a052686f21343460824a1b88ab2129e
Parent:     e87d38fd8e03d5fd3c1f649edc2c3ef733b6cb72
Author:     Phil Pennock <pdp@???>
AuthorDate: Wed Jun 6 14:13:34 2012 -0400
Committer:  Phil Pennock <pdp@???>
CommitDate: Wed Jun 6 14:13:34 2012 -0400

    LLONG_MIN example in os.h-Linux
---
 src/OS/os.h-Linux |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/src/OS/os.h-Linux b/src/OS/os.h-Linux
index fe4eaa6..3fead17 100644
--- a/src/OS/os.h-Linux
+++ b/src/OS/os.h-Linux
@@ -57,4 +57,16 @@ 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
+
+
/* End */