+# See if machine/reg.h supports the %fs and %gs i386 segment registers.
+# Older i386 BSD's don't have the r_fs and r_gs members of `struct reg'.
+AC_CACHE_CHECK([for r_fs in struct reg], gdb_cv_struct_reg_r_fs,
+[AC_TRY_COMPILE([#include <machine/reg.h>], [struct reg r; r.r_fs;],
+gdb_cv_struct_reg_r_fs=yes, gdb_cv_struct_reg_r_fs=no)])
+if test $gdb_cv_struct_reg_r_fs = yes; then
+ AC_DEFINE(HAVE_STRUCT_REG_R_FS)
+fi
+AC_CACHE_CHECK([for r_gs in struct reg], gdb_cv_struct_reg_r_gs,
+[AC_TRY_COMPILE([#include <machine/reg.h>], [struct reg r; r.r_gs;],
+gdb_cv_struct_reg_r_gs=yes, gdb_cv_struct_reg_r_gs=no)])
+if test $gdb_cv_struct_reg_r_gs = yes; then
+ AC_DEFINE(HAVE_STRUCT_REG_R_GS)
+fi
+
+dnl See if ptrace.h provides the PTRACE_GETREGS request.
+AC_MSG_CHECKING(for PTRACE_GETREGS)
+AC_CACHE_VAL(gdb_cv_have_ptrace_getregs,
+[AC_TRY_COMPILE([#include <sys/ptrace.h>],
+ [PTRACE_GETREGS;],
+ [gdb_cv_have_ptrace_getregs=yes],
+ [gdb_cv_have_ptrace_getregs=no])])
+AC_MSG_RESULT($gdb_cv_have_ptrace_getregs)
+if test $gdb_cv_have_ptrace_getregs = yes; then
+ AC_DEFINE(HAVE_PTRACE_GETREGS)
+fi
+
+dnl See if ptrace.h provides the PTRACE_GETFPXREGS request.
+AC_MSG_CHECKING(for PTRACE_GETFPXREGS)
+AC_CACHE_VAL(gdb_cv_have_ptrace_getfpxregs,
+[AC_TRY_COMPILE([#include <sys/ptrace.h>],
+ [PTRACE_GETFPXREGS;],
+ [gdb_cv_have_ptrace_getfpxregs=yes],
+ [gdb_cv_have_ptrace_getfpxregs=no])])
+AC_MSG_RESULT($gdb_cv_have_ptrace_getfpxregs)
+if test $gdb_cv_have_ptrace_getfpxregs = yes; then
+ AC_DEFINE(HAVE_PTRACE_GETFPXREGS)
+fi
+
+AC_CHECK_LIB(socket, socketpair)
+AC_CHECK_FUNCS(socketpair)
+
+