diff --git gdb/configure gdb/configure
index 355f190..9c60e01 100755
--- gdb/configure
+++ gdb/configure
@@ -11423,7 +11423,8 @@ fi
 
 # 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_fn_c_check_member "$LINENO" "struct reg" "r_fs" "ac_cv_member_struct_reg_r_fs" "#include <machine/reg.h>
+ac_fn_c_check_member "$LINENO" "struct reg" "r_fs" "ac_cv_member_struct_reg_r_fs" "#include <sys/types.h>
+#include <machine/reg.h>
 "
 if test "x$ac_cv_member_struct_reg_r_fs" = x""yes; then :
 
@@ -11433,7 +11434,8 @@ _ACEOF
 
 
 fi
-ac_fn_c_check_member "$LINENO" "struct reg" "r_gs" "ac_cv_member_struct_reg_r_gs" "#include <machine/reg.h>
+ac_fn_c_check_member "$LINENO" "struct reg" "r_gs" "ac_cv_member_struct_reg_r_gs" "#include <sys/types.h>
+#include <machine/reg.h>
 "
 if test "x$ac_cv_member_struct_reg_r_gs" = x""yes; then :
 
@@ -12945,10 +12947,9 @@ fi
 
 build_warnings="-Wall -Wdeclaration-after-statement -Wpointer-arith \
 -Wpointer-sign \
--Wno-unused -Wunused-value -Wunused-function \
+-Wno-unused -Wunused-value \
 -Wno-switch -Wno-char-subscripts -Wmissing-prototypes \
--Wdeclaration-after-statement -Wempty-body -Wmissing-parameter-type \
--Wold-style-declaration -Wold-style-definition"
+-Wdeclaration-after-statement -Wempty-body -Wold-style-definition"
 
 # Enable -Wno-format by default when using gcc on mingw since many
 # GCC versions complain about %I64.