Replace some src/s undefs by never even checking on relevant platforms

* configure.in: (getwd): Don't check for it on unixware.
(random, rint): Don't check for these on hpux.
(res_init, libresolv): Don't check for these on darwin.

* src/s/darwin.h (HAVE_RES_INIT, HAVE_LIBRESOLV):
* src/s/hpux10-20.h (HAVE_RINT, HAVE_RANDOM):
* src/s/unixware.h (HAVE_GETWD): Move undefs to configure (effectively).

4 files changed, 8 insertions, 19 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index ef2d06dc5b0..03c92804fb8 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2012-07-07  Glenn Morris  <rgm@gnu.org>
+
+        * s/darwin.h (HAVE_RES_INIT, HAVE_LIBRESOLV):
+        * s/hpux10-20.h (HAVE_RINT, HAVE_RANDOM):
+        * s/unixware.h (HAVE_GETWD): Move undefs to configure (effectively).
+
 2012-07-07  Juanma Barranquero  <lekktu@gmail.com>
 
         * makefile.w32-in (DISPEXTERN_H, $(BLD)/regex.$(O)):
diff --git a/src/s/darwin.h b/src/s/darwin.h
index ce86bc5f578..b042630ee91 100644
--- a/src/s/darwin.h
+++ b/src/s/darwin.h
@@ -106,11 +106,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #define SYSTEM_PURESIZE_EXTRA 200000
 #endif
 
-/* On Darwin, res_init appears not to be useful: see bug#562 and
-   http://lists.gnu.org/archive/html/emacs-devel/2007-11/msg01467.html  */
-#undef HAVE_RES_INIT
-#undef HAVE_LIBRESOLV
-
 #ifdef emacs
 #define malloc unexec_malloc
 #define realloc unexec_realloc
diff --git a/src/s/hpux10-20.h b/src/s/hpux10-20.h
index 683837891f4..62bb0f4e344 100644
--- a/src/s/hpux10-20.h
+++ b/src/s/hpux10-20.h
@@ -61,23 +61,14 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
    HP-UX 10.20, and that it works for HP-UX 0 as well.  */
 #define NO_EDITRES
 
-/* Eric Backus <ericb@lsid.hp.com> says, HP-UX 9.x on HP 700 machines
-   has a broken `rint' in some library versions including math library
-   version number A.09.05.
-
-   You can fix the math library by installing patch number PHSS_4630.
-   But we can fix it more reliably for Emacs like this.  */
-#undef HAVE_RINT
-
 /* We have to go this route, rather than hpux9's approach of renaming the
    functions via macros.  The system's stdlib.h has fully prototyped
    declarations, which yields a conflicting definition of srand48; it
    tries to redeclare what was once srandom to be srand48.  So we go
-   with HAVE_LRAND48 being defined.  */
+   with HAVE_LRAND48 being defined.
+   Note we also undef HAVE_RANDOM via configure.  */
 #undef srandom
 #undef random
-#undef HAVE_RANDOM
-
 
 /* Rainer Malzbender <rainer@displaytech.com> says defining
    HAVE_XRMSETDATABASE allows Emacs to compile on HP-UX 10.20 using GCC.  */
diff --git a/src/s/unixware.h b/src/s/unixware.h
index 18d24b28507..1f35287f6d1 100644
--- a/src/s/unixware.h
+++ b/src/s/unixware.h
@@ -20,9 +20,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "usg5-4-common.h"
 
-/* #define HAVE_GETWD  (appears to be buggy on SVR4.2) */
-#undef HAVE_GETWD
-
 /* This is the same definition as in usg5-4-common.h, but with sigblock/sigunblock
    rather than sighold/sigrelse, which appear to be BSD4.1 specific.
    It may also be appropriate for SVR4.x