forced X/Open mode on HPUX removed. The correct way (that affects not only C...

forced X/Open mode on HPUX removed. The correct way (that affects not only C but also C++ and linking) would be

CFLAGS="-D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED -D_HPUX_SOURCE"
CXXFLAGS="-D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED -D_HPUX_SOURCE"
LDFLAGS="-lxnet"

but apparently MySQL works without too.

include/my_global.h

@@ -120,26 +120,6 @@
 #define __STDC_EXT__ 1          /* To get large file support on hpux */
 #endif
 
-#ifdef HPUX11
-/*
-  Fix warnings on HPUX11
-  There is something really strange with HPUX11 include files as you get
-  error about wrongly declared symbols or missing defines if you don't
-  do the following:
- */
-#if !defined(_XOPEN_SOURCE_EXTENDED) && ! defined(__cplusplus)
-#define _XOPEN_SOURCE_EXTENDED 1
-#endif
-
-/* Fix type of socklen as this is depending on the above define */
-#undef SOCKET_SIZE_TYPE
-#ifdef _XOPEN_SOURCE_EXTENDED
-#define SOCKET_SIZE_TYPE socklen_t
-#else
-#define SOCKET_SIZE_TYPE int
-#endif /* _XOPEN_SOURCE_EXTENDED */
-#endif /* HPUX11 */
-
 #if defined(THREAD) && !defined(__WIN__) && !defined(OS2)
 #ifndef _POSIX_PTHREAD_SEMANTICS
 #define _POSIX_PTHREAD_SEMANTICS /* We want posix threads */