_ISOC99_SOURCE -> _GNU_SOURCE

_ISOC99_SOURCE broke build on Linux (Ubuntu 11.10) because it broke <resolv.h>, <arpa/nameser.h>, etc.
Their u_char and u_int usage relies upon BSD source being enabled too.  So use _GNU_SOURCE.

diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index ef3236a6213960d9b9a492684e36bf9865a0dd29..b7a6a00e4b88e7a1fa6740800253f5b6c1297058 100644 (file)
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -149,7 +149,7 @@ PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
       64-bit ${eval} (JH/03).
 
-PP/36 Define _ISOC99_SOURCE in exim.h; it's needed for some releases of
+PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
       GNU libc to support some of the 64-bit stuff, should not lead to
       conflicts.  Defined before os.h is pulled in, so if a given platform
       needs to override this, it can.

diff --git a/src/src/exim.h b/src/src/exim.h
index 987aebf838d354da59a6753468f13dbea9361e80..c18c9aef3f906d2e9b59133093ce7068d71a2786 100644 (file)
--- a/src/src/exim.h
+++ b/src/src/exim.h
@@ -21,9 +21,11 @@ This call dates back at least as far as SUSv2. */
 #define HAVE_SRANDOM
 
 /* This is primarily for the Gnu C library; we define it before os.h so that
-os.h has a chance to hurriedly undef it, Just In Case. */
+os.h has a chance to hurriedly undef it, Just In Case.  We need C99 for some
+64-bit math support, and defining _ISOC99_SOURCE breaks <resolv.h> and friends.
+*/
 
-#define _ISOC99_SOURCE 1
+#define _GNU_SOURCE 1
 
 /* First of all include the os-specific header, which might set things that
 are needed by any of the other headers, including system headers. */