From: Phil Pennock <pdp@exim.org>
Date: Wed, 6 Jun 2012 18:13:34 +0000 (-0400)
Subject: LLONG_MIN example in os.h-Linux
X-Git-Tag: exim-4_81_RC1~61
X-Git-Url: https://vcs.fsf.org/?a=commitdiff_plain;h=05ec18de4a052686f21343460824a1b88ab2129e;p=exim.git

LLONG_MIN example in os.h-Linux
---

diff --git a/src/OS/os.h-Linux b/src/OS/os.h-Linux
index fe4eaa6c7..3fead17d7 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 */