Check for spawn.h, execinfo.h, and libproc.h and block out sections of code
where related system functions are not available. This enables compilation
on 10.4 and 10.5.

--- gdb/config.in.orig
+++ gdb/config.in
@@ -124,6 +124,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define to 1 if you have the <execinfo.h> header file. */
+#undef HAVE_EXECINFO_H
+
 /* Define to 1 if you have the `fork' function. */
 #undef HAVE_FORK
 
@@ -169,6 +172,9 @@
 /* Define to 1 if you have the `m' library (-lm). */
 #undef HAVE_LIBM
 
+/* Define to 1 if you have the <libproc.h> header file. */
+#undef HAVE_LIBPROC_H
+
 /* Define if libunwind library is being used. */
 #undef HAVE_LIBUNWIND
 
@@ -337,6 +343,9 @@
 /* Define to 1 if the system has the type `socklen_t'. */
 #undef HAVE_SOCKLEN_T
 
+/* Define to 1 if you have the <spawn.h> header file. */
+#undef HAVE_SPAWN_H
+
 /* Define to 1 if you have the <stddef.h> header file. */
 #undef HAVE_STDDEF_H
 
--- gdb/configure.ac.orig
+++ gdb/configure.ac
@@ -524,7 +524,7 @@ AC_CHECK_HEADERS(sys/user.h, [], [],
 ])
 AC_CHECK_HEADERS(sys/wait.h wait.h)
 AC_CHECK_HEADERS(termios.h termio.h sgtty.h)
-AC_CHECK_HEADERS(unistd.h)
+AC_CHECK_HEADERS(unistd.h spawn.h execinfo.h libproc.h)
 
 # On Solaris 2.[789], we need to define _MSE_INT_H to avoid a clash
 # between <widec.h> and <wchar.h> that would cause AC_CHECK_HEADERS to
--- gdb/configure.orig
+++ gdb/configure
@@ -27720,7 +27720,7 @@ fi
 done
 
 
-for ac_header in unistd.h
+for ac_header in unistd.h spawn.h execinfo.h libproc.h
 do
 as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
 if { as_var=$as_ac_Header; eval "test \"\${$as_var+set}\" = set"; }; then
--- gdb/macosx/macosx-nat-dyld.c.orig
+++ gdb/macosx/macosx-nat-dyld.c
@@ -791,7 +791,7 @@ macosx_locate_dyld_via_taskinfo (macosx_dyld_thread_status *s)
        }
      else
        {
-#if defined (NM_NEXTSTEP)
+#if defined (NM_NEXTSTEP) && defined(TASK_DYLD_INFO)
           if (macosx_status->task == TASK_NULL)
             return 0;
 
--- gdb/macosx/macosx-nat-inferior.c.orig
+++ gdb/macosx/macosx-nat-inferior.c
@@ -60,13 +60,17 @@
 #include <sys/sysctl.h>
 #include <sys/proc.h>
 #include <mach/mach_error.h>
+#ifdef HAVE_SPAWN_H
 #include <spawn.h>
+#endif
 
 #include <semaphore.h>
 
 #include <dlfcn.h>
+#ifdef HAVE_LIBPROC_H
 #include <libproc.h>
 #include <sys/proc_info.h>
+#endif
 
 #include "macosx-nat-dyld.h"
 #include "macosx-nat-inferior.h"
@@ -2701,6 +2705,7 @@ macosx_get_thread_name (ptid_t ptid)
   if (tp->private == NULL || tp->private->app_thread_port == 0)
     return NULL;
 
+#if defined(THREAD_IDENTIFIER_INFO)
   thread_identifier_info_data_t tident;
   unsigned int info_count;
   kern_return_t kret;
@@ -2728,6 +2733,7 @@ macosx_get_thread_name (ptid_t ptid)
             }
         }
     }
+#endif /* defined(THREAD_IDENTIFIER_INFO) */
   return buf;
 }
 
--- gdb/macosx/macosx-nat-infthread.c
+++ gdb/macosx/macosx-nat-infthread.c
@@ -36,8 +36,10 @@
 #include <sys/dir.h>
 #include <inttypes.h>
 
+#ifdef HAVE_LIBPROC_H
 #include <libproc.h>
 #include <sys/proc_info.h>
+#endif
 
 #include "macosx-nat-inferior.h"
 #include "macosx-nat-inferior-util.h"
@@ -810,6 +812,7 @@ print_thread_info (thread_t tid, int *gdb_thread_id)
     print_stack_frame (get_selected_frame (NULL), 0, LOCATION);
     switch_to_thread (current_ptid);
 
+#if defined(THREAD_IDENTIFIER_INFO)
   thread_identifier_info_data_t tident;
   info_count = THREAD_IDENTIFIER_INFO_COUNT;
   kret = thread_info (tid, THREAD_IDENTIFIER_INFO, (thread_info_t) &tident, 
@@ -879,6 +882,7 @@ print_thread_info (thread_t tid, int *gdb_thread_id)
       printf_filtered ("\tcurrent priority: %d\n", pth.pth_priority);
       printf_filtered ("\tmax priority: %d\n", pth.pth_maxpriority);
     }
+#endif /* defined(THREAD_IDENTIFIER_INFO) */
 
   printf_filtered ("\tsuspend count: %d", info.suspend_count);
 
@@ -1176,6 +1180,7 @@ macosx_print_thread_details (struct ui_out *uiout, ptid_t ptid)
   ui_out_field_fmt (uiout, "mach-port-number", "0x%s", 
                     paddr_nz (app_thread_name));
 
+#if defined(THREAD_IDENTIFIER_INFO)
   thread_identifier_info_data_t tident;
   info_count = THREAD_IDENTIFIER_INFO_COUNT;
   kret = thread_info (tid, THREAD_IDENTIFIER_INFO, (thread_info_t) &tident, 
@@ -1208,6 +1213,7 @@ macosx_print_thread_details (struct ui_out *uiout, ptid_t ptid)
                               paddr_nz (struct_addr));
         }
     }
+#endif /* defined(THREAD_IDENTIFIER_INFO) */
 }