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authorPhil Pennock <pdp@exim.org>2012-06-06 14:13:34 -0400
committerPhil Pennock <pdp@exim.org>2012-06-06 14:13:34 -0400
commit05ec18de4a052686f21343460824a1b88ab2129e (patch)
treeff1484b53652ec01e083b288f29be10f73367a76 /src/OS/os.h-Linux
parente87d38fd8e03d5fd3c1f649edc2c3ef733b6cb72 (diff)
LLONG_MIN example in os.h-Linux
Diffstat (limited to 'src/OS/os.h-Linux')
-rw-r--r--src/OS/os.h-Linux12
1 files changed, 12 insertions, 0 deletions
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 */