sim: unify platform function & header tests

Move the various platform tests up a level to avoid duplication
across the ports.  When building multiple versions, this speeds
things up a bit.

For now we move the obvious stuff up a level, but we don't turn
own the config.h entirely just yet -- we still have some tests
related to libraries that need consideration.

4 files changed, 7 insertions, 580 deletions

diff --git a/sim/cris/ChangeLog b/sim/cris/ChangeLog
index c0bb314e10..317eedced1 100644
--- a/sim/cris/ChangeLog
+++ b/sim/cris/ChangeLog
@@ -1,3 +1,8 @@
+2021-06-12  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete call AC_CHECK_HEADERS_ONCE.
+	* config.in, configure: Regenerate.
+
 2021-06-09  Mike Frysinger  <vapier@gentoo.org>
 
 	* sim-if.c (sim_open): Delete cgen_init call.
diff --git a/sim/cris/config.in b/sim/cris/config.in
index 1a12e071d7..bcc3ce599b 100644
--- a/sim/cris/config.in
+++ b/sim/cris/config.in
@@ -16,18 +16,6 @@
 /* Define if dv-sockser is usable. */
 #undef HAVE_DV_SOCKSER
 
-/* Define to 1 if you have the <fcntl.h> header file. */
-#undef HAVE_FCNTL_H
-
-/* Define to 1 if you have the <fpu_control.h> header file. */
-#undef HAVE_FPU_CONTROL_H
-
-/* Define to 1 if you have the `ftruncate' function. */
-#undef HAVE_FTRUNCATE
-
-/* Define to 1 if you have the `getrusage' function. */
-#undef HAVE_GETRUSAGE
-
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
@@ -40,27 +28,9 @@
 /* Define to 1 if you have the `socket' library (-lsocket). */
 #undef HAVE_LIBSOCKET
 
-/* Define to 1 if you have the `lstat' function. */
-#undef HAVE_LSTAT
-
 /* Define to 1 if you have the <memory.h> header file. */
 #undef HAVE_MEMORY_H
 
-/* Define to 1 if you have the `mmap' function. */
-#undef HAVE_MMAP
-
-/* Define to 1 if you have the `munmap' function. */
-#undef HAVE_MUNMAP
-
-/* Define to 1 if you have the `posix_fallocate' function. */
-#undef HAVE_POSIX_FALLOCATE
-
-/* Define to 1 if you have the `sigaction' function. */
-#undef HAVE_SIGACTION
-
-/* Define to 1 if the system has the type `socklen_t'. */
-#undef HAVE_SOCKLEN_T
-
 /* Define to 1 if you have the <stdint.h> header file. */
 #undef HAVE_STDINT_H
 
@@ -73,87 +43,18 @@
 /* Define to 1 if you have the <string.h> header file. */
 #undef HAVE_STRING_H
 
-/* Define to 1 if you have the `strsignal' function. */
-#undef HAVE_STRSIGNAL
-
-/* Define to 1 if `st_atime' is a member of `struct stat'. */
-#undef HAVE_STRUCT_STAT_ST_ATIME
-
-/* Define to 1 if `st_blksize' is a member of `struct stat'. */
-#undef HAVE_STRUCT_STAT_ST_BLKSIZE
-
-/* Define to 1 if `st_blocks' is a member of `struct stat'. */
-#undef HAVE_STRUCT_STAT_ST_BLOCKS
-
-/* Define to 1 if `st_ctime' is a member of `struct stat'. */
-#undef HAVE_STRUCT_STAT_ST_CTIME
-
-/* Define to 1 if `st_dev' is a member of `struct stat'. */
-#undef HAVE_STRUCT_STAT_ST_DEV
-
-/* Define to 1 if `st_gid' is a member of `struct stat'. */
-#undef HAVE_STRUCT_STAT_ST_GID
-
-/* Define to 1 if `st_ino' is a member of `struct stat'. */
-#undef HAVE_STRUCT_STAT_ST_INO
-
-/* Define to 1 if `st_mode' is a member of `struct stat'. */
-#undef HAVE_STRUCT_STAT_ST_MODE
-
-/* Define to 1 if `st_mtime' is a member of `struct stat'. */
-#undef HAVE_STRUCT_STAT_ST_MTIME
-
-/* Define to 1 if `st_nlink' is a member of `struct stat'. */
-#undef HAVE_STRUCT_STAT_ST_NLINK
-
-/* Define to 1 if `st_rdev' is a member of `struct stat'. */
-#undef HAVE_STRUCT_STAT_ST_RDEV
-
-/* Define to 1 if `st_size' is a member of `struct stat'. */
-#undef HAVE_STRUCT_STAT_ST_SIZE
-
-/* Define to 1 if `st_uid' is a member of `struct stat'. */
-#undef HAVE_STRUCT_STAT_ST_UID
-
-/* Define to 1 if you have the <sys/mman.h> header file. */
-#undef HAVE_SYS_MMAN_H
-
-/* Define to 1 if you have the <sys/param.h> header file. */
-#undef HAVE_SYS_PARAM_H
-
-/* Define to 1 if you have the <sys/resource.h> header file. */
-#undef HAVE_SYS_RESOURCE_H
-
-/* Define to 1 if you have the <sys/select.h> header file. */
-#undef HAVE_SYS_SELECT_H
-
-/* Define to 1 if you have the <sys/socket.h> header file. */
-#undef HAVE_SYS_SOCKET_H
-
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #undef HAVE_SYS_STAT_H
 
 /* Define to 1 if you have the <sys/types.h> header file. */
 #undef HAVE_SYS_TYPES_H
 
-/* Define to 1 if you have the `time' function. */
-#undef HAVE_TIME
-
-/* Define to 1 if you have the `truncate' function. */
-#undef HAVE_TRUNCATE
-
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H
 
 /* Define to 1 if you have the <windows.h> header file. */
 #undef HAVE_WINDOWS_H
 
-/* Define to 1 if the system has the type `__int128'. */
-#undef HAVE___INT128
-
-/* Define to 1 if you have the `__setfpucw' function. */
-#undef HAVE___SETFPUCW
-
 /* Define to the sub-directory in which libtool stores uninstalled libraries.
    */
 #undef LT_OBJDIR
@@ -188,9 +89,6 @@
 /* Bug reporting address */
 #undef REPORT_BUGS_TO
 
-/* Define as the return type of signal handlers (`int' or `void'). */
-#undef RETSIGTYPE
-
 /* Define to 1 if you have the ANSI C header files. */
 #undef STDC_HEADERS
 
diff --git a/sim/cris/configure b/sim/cris/configure
index 1aaf58dc9d..49f12af962 100755
--- a/sim/cris/configure
+++ b/sim/cris/configure
@@ -629,8 +629,6 @@ ac_includes_default="\
 # include <unistd.h>
 #endif"
 
-ac_header_list=
-ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
@@ -1908,117 +1906,6 @@ $as_echo "$ac_res" >&6; }
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
 
 } # ac_fn_c_check_func
-
-# ac_fn_c_check_member LINENO AGGR MEMBER VAR INCLUDES
-# ----------------------------------------------------
-# Tries to find if the field MEMBER exists in type AGGR, after including
-# INCLUDES, setting cache variable VAR accordingly.
-ac_fn_c_check_member ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
-$as_echo_n "checking for $2.$3... " >&6; }
-if eval \${$4+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$5
-int
-main ()
-{
-static $2 ac_aggr;
-if (ac_aggr.$3)
-return 0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  eval "$4=yes"
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$5
-int
-main ()
-{
-static $2 ac_aggr;
-if (sizeof ac_aggr.$3)
-return 0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  eval "$4=yes"
-else
-  eval "$4=no"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-eval ac_res=\$$4
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-
-} # ac_fn_c_check_member
-
-# ac_fn_c_check_type LINENO TYPE VAR INCLUDES
-# -------------------------------------------
-# Tests whether TYPE exists after having included INCLUDES, setting cache
-# variable VAR accordingly.
-ac_fn_c_check_type ()
-{
-  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
-$as_echo_n "checking for $2... " >&6; }
-if eval \${$3+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  eval "$3=no"
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$4
-int
-main ()
-{
-if (sizeof ($2))
-	 return 0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$4
-int
-main ()
-{
-if (sizeof (($2)))
-	    return 0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-
-else
-  eval "$3=yes"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-eval ac_res=\$$3
-	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-$as_echo "$ac_res" >&6; }
-  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
-
-} # ac_fn_c_check_type
 cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
@@ -2303,27 +2190,6 @@ $as_echo "$as_me: creating cache $cache_file" >&6;}
   >$cache_file
 fi
 
-as_fn_append ac_header_list " dlfcn.h"
-as_fn_append ac_header_list " fcntl.h"
-as_fn_append ac_header_list " fpu_control.h"
-as_fn_append ac_header_list " unistd.h"
-as_fn_append ac_header_list " sys/mman.h"
-as_fn_append ac_header_list " sys/resource.h"
-as_fn_append ac_header_list " sys/stat.h"
-as_fn_append ac_func_list " __setfpucw"
-as_fn_append ac_func_list " ftruncate"
-as_fn_append ac_func_list " getrusage"
-as_fn_append ac_func_list " lstat"
-as_fn_append ac_func_list " mmap"
-as_fn_append ac_func_list " munmap"
-as_fn_append ac_func_list " posix_fallocate"
-as_fn_append ac_func_list " sigaction"
-as_fn_append ac_func_list " strsignal"
-as_fn_append ac_func_list " time"
-as_fn_append ac_func_list " truncate"
-as_fn_append ac_header_list " sys/param.h"
-as_fn_append ac_header_list " sys/select.h"
-as_fn_append ac_header_list " sys/socket.h"
 # Check that the precious variables saved in the cache have kept the same
 # value.
 ac_cache_corrupted=false
@@ -3898,74 +3764,6 @@ rmdir .tst 2>/dev/null
 
 DEPDIR="${am__leading_dot}deps"
 
-
-
-
-  for ac_header in $ac_header_list
-do :
-  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
-"
-if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
-  cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
-_ACEOF
-
-fi
-
-done
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-  for ac_func in $ac_func_list
-do :
-  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
-ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
-if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
-  cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
-_ACEOF
-
-fi
-done
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
 case `pwd` in
   *\ * | *\	*)
     { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Libtool does not cope well with whitespace in \`pwd\`" >&5
@@ -7307,230 +7105,6 @@ $as_echo "$LINGUAS" >&6; }
 
 fi
 
-# Check for common headers.
-# NB: You can assume C11 headers exist.
-
-
-ac_fn_c_check_member "$LINENO" "struct stat" "st_dev" "ac_cv_member_struct_stat_st_dev" "#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-"
-if test "x$ac_cv_member_struct_stat_st_dev" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STAT_ST_DEV 1
-_ACEOF
-
-
-fi
-ac_fn_c_check_member "$LINENO" "struct stat" "st_ino" "ac_cv_member_struct_stat_st_ino" "#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-"
-if test "x$ac_cv_member_struct_stat_st_ino" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STAT_ST_INO 1
-_ACEOF
-
-
-fi
-ac_fn_c_check_member "$LINENO" "struct stat" "st_mode" "ac_cv_member_struct_stat_st_mode" "#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-"
-if test "x$ac_cv_member_struct_stat_st_mode" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STAT_ST_MODE 1
-_ACEOF
-
-
-fi
-ac_fn_c_check_member "$LINENO" "struct stat" "st_nlink" "ac_cv_member_struct_stat_st_nlink" "#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-"
-if test "x$ac_cv_member_struct_stat_st_nlink" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STAT_ST_NLINK 1
-_ACEOF
-
-
-fi
-ac_fn_c_check_member "$LINENO" "struct stat" "st_uid" "ac_cv_member_struct_stat_st_uid" "#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-"
-if test "x$ac_cv_member_struct_stat_st_uid" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STAT_ST_UID 1
-_ACEOF
-
-
-fi
-ac_fn_c_check_member "$LINENO" "struct stat" "st_gid" "ac_cv_member_struct_stat_st_gid" "#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-"
-if test "x$ac_cv_member_struct_stat_st_gid" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STAT_ST_GID 1
-_ACEOF
-
-
-fi
-ac_fn_c_check_member "$LINENO" "struct stat" "st_rdev" "ac_cv_member_struct_stat_st_rdev" "#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-"
-if test "x$ac_cv_member_struct_stat_st_rdev" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STAT_ST_RDEV 1
-_ACEOF
-
-
-fi
-ac_fn_c_check_member "$LINENO" "struct stat" "st_size" "ac_cv_member_struct_stat_st_size" "#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-"
-if test "x$ac_cv_member_struct_stat_st_size" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STAT_ST_SIZE 1
-_ACEOF
-
-
-fi
-ac_fn_c_check_member "$LINENO" "struct stat" "st_blksize" "ac_cv_member_struct_stat_st_blksize" "#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-"
-if test "x$ac_cv_member_struct_stat_st_blksize" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STAT_ST_BLKSIZE 1
-_ACEOF
-
-
-fi
-ac_fn_c_check_member "$LINENO" "struct stat" "st_blocks" "ac_cv_member_struct_stat_st_blocks" "#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-"
-if test "x$ac_cv_member_struct_stat_st_blocks" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STAT_ST_BLOCKS 1
-_ACEOF
-
-
-fi
-ac_fn_c_check_member "$LINENO" "struct stat" "st_atime" "ac_cv_member_struct_stat_st_atime" "#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-"
-if test "x$ac_cv_member_struct_stat_st_atime" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STAT_ST_ATIME 1
-_ACEOF
-
-
-fi
-ac_fn_c_check_member "$LINENO" "struct stat" "st_mtime" "ac_cv_member_struct_stat_st_mtime" "#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-"
-if test "x$ac_cv_member_struct_stat_st_mtime" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STAT_ST_MTIME 1
-_ACEOF
-
-
-fi
-ac_fn_c_check_member "$LINENO" "struct stat" "st_ctime" "ac_cv_member_struct_stat_st_ctime" "#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#ifdef HAVE_SYS_STAT_H
-#include <sys/stat.h>
-#endif
-"
-if test "x$ac_cv_member_struct_stat_st_ctime" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_STRUCT_STAT_ST_CTIME 1
-_ACEOF
-
-
-fi
-
-ac_fn_c_check_type "$LINENO" "__int128" "ac_cv_type___int128" "$ac_includes_default"
-if test "x$ac_cv_type___int128" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE___INT128 1
-_ACEOF
-
-
-fi
-
-ac_fn_c_check_type "$LINENO" "socklen_t" "ac_cv_type_socklen_t" "#include <sys/types.h>
-#include <sys/socket.h>
-
-"
-if test "x$ac_cv_type_socklen_t" = xyes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define HAVE_SOCKLEN_T 1
-_ACEOF
-
-
-fi
-
-
 # Check for socket libraries
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for bind in -lsocket" >&5
 $as_echo_n "checking for bind in -lsocket... " >&6; }
@@ -11221,7 +10795,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11224 "configure"
+#line 10798 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11327,7 +10901,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11330 "configure"
+#line 10904 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11838,49 +11412,6 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking return type of signal handlers" >&5
-$as_echo_n "checking return type of signal handlers... " >&6; }
-if ${ac_cv_type_signal+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <sys/types.h>
-#include <signal.h>
-
-int
-main ()
-{
-return *(signal (0, 0)) (0) == 1;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_cv_type_signal=int
-else
-  ac_cv_type_signal=void
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_type_signal" >&5
-$as_echo "$ac_cv_type_signal" >&6; }
-
-cat >>confdefs.h <<_ACEOF
-#define RETSIGTYPE $ac_cv_type_signal
-_ACEOF
-
-
-
-
-
-
-# For dv-rv and rvdummy.
-
-
-
-
-
 
 
 
diff --git a/sim/cris/configure.ac b/sim/cris/configure.ac
index f8aa533a06..b5eaea7b8a 100644
--- a/sim/cris/configure.ac
+++ b/sim/cris/configure.ac
@@ -4,13 +4,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-# For dv-rv and rvdummy.
-AC_CHECK_HEADERS_ONCE(m4_flatten([
-  sys/param.h
-  sys/select.h
-  sys/socket.h
-]))
-
 SIM_AC_OPTION_ENDIAN(LITTLE)
 SIM_AC_OPTION_ALIGNMENT(NONSTRICT_ALIGNMENT)
 SIM_AC_OPTION_SCACHE(16384)