[gcc r13-5072] Fix compilation of server.cc on hpux.

[gcc r13-5072] Fix compilation of server.cc on hpux.

[John David Anglin]

https://gcc.gnu.org/g:0925a9772960c946440833033423bff41c330154

commit r13-5072-g0925a9772960c946440833033423bff41c330154
Author: John David Anglin <danglin@gcc.gnu.org>
Date:   Mon Jan 9 15:41:51 2023 +0000

    Fix compilation of server.cc on hpux.
    
    Select and FD_ISSET are declared in sys/time.h on most versions
    of hpux.  As a result, HAVE_PSELECT and HAVE_SELECT can be 0.
    
    2023-01-08  John David Anglin  <danglin@gcc.gnu.org>
    
    c++tools/ChangeLog:
    
            PR other/107616
            * server.cc (server): Don't call FD_ISSET when HAVE_PSELECT
            and HAVE_SELECT are zero.

Diff:
---
 c++tools/server.cc | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/c++tools/server.cc b/c++tools/server.cc
index eded5c50628..79905eca9ac 100644
--- a/c++tools/server.cc
+++ b/c++tools/server.cc
@@ -753,8 +753,10 @@ server (bool ipv6, int sock_fd, module_resolver *resolver)
 		      }
 		  }
 
+#if defined (HAVE_PSELECT) || defined (HAVE_SELECT)
 	      if (active < 0 && sock_fd >= 0 && FD_ISSET (sock_fd, &readers))
 		active = -1;
+#endif
 	    }
 
 	  if (active >= 0)