--- nono/configure.ac	2026/04/29 17:05:04	1.1.1.9
+++ nono/configure.ac	2026/04/29 17:05:11	1.1.1.11
@@ -4,8 +4,8 @@
 # Licensed under nono-license.txt
 #
 
-AC_PREREQ([2.69])
-AC_INIT([nono], [0.0], [])
+AC_PREREQ([2.71])
+AC_INIT([nono],[0.0],[])
 AC_CONFIG_SRCDIR(wx/wxapp.cpp)
 AC_CONFIG_AUX_DIR([scripts])
 
@@ -13,7 +13,6 @@ AC_CONFIG_AUX_DIR([scripts])
 AC_PROG_CXX
 AC_PROG_CC
 AC_PROG_INSTALL
-AC_C_BIGENDIAN
 
 # OS
 AC_CANONICAL_HOST
@@ -55,6 +54,7 @@ AC_DEFUN([ADD_CC_WARN_IF],[
 	CFLAGS="${CFLAGS} -Werror $1"
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])],
 		AC_MSG_RESULT([yes])
+		eval `echo cc_has$1=yes | sed -e 's/-/_/g'`
 		WARNFLAGS_C="${WARNFLAGS_C} $1",
 		AC_MSG_RESULT([no]))
 	CFLAGS="${old_CFLAGS}"
@@ -64,18 +64,24 @@ ADD_CC_WARN_IF(-Wextra-semi)
 ADD_CC_WARN_IF(-Wlogical-op)
 ADD_CC_WARN_IF(-Wmissing-prototypes)
 ADD_CC_WARN_IF(-Wmissing-variable-declarations)
+# -Wshadow-local があればそっちを使う(gcc>=7)、なければ -Wshadow (clang)
+ADD_CC_WARN_IF(-Wshadow-local)
+if test x"${cc_has_Wshadow_local}" != xyes; then
+	ADD_CC_WARN_IF(-Wshadow)
+fi
 AC_LANG_POP([C])
 AC_SUBST([WARNFLAGS_C])
 
 # C++ コンパイラのワーニングオプション
 # (AC_LANG は C++ のまま継続する)
-AC_LANG_CPLUSPLUS
+AC_LANG([C++])
 AC_DEFUN([ADD_CXX_WARN_IF],[
 	AC_MSG_CHECKING([whether c++ accepts $1])
 	old_CXXFLAGS="${CXXFLAGS}"
 	CXXFLAGS="${CXXFLAGS} -Werror $1"
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])],
 		AC_MSG_RESULT([yes])
+		eval `echo cxx_has$1=yes | sed -e 's/-/_/g'`
 		WARNFLAGS_CXX="${WARNFLAGS_CXX} $1",
 		AC_MSG_RESULT([no]))
 	CXXFLAGS="${old_CXXFLAGS}"
@@ -87,6 +93,11 @@ ADD_CXX_WARN_IF(-Winconsistent-missing-d
 ADD_CXX_WARN_IF(-Wlogical-op)
 ADD_CXX_WARN_IF(-Wmissing-prototypes)
 ADD_CXX_WARN_IF(-Wmissing-variable-declarations)
+# -Wshadow-local があればそっちを使う(gcc>=7)、なければ -Wshadow (clang)
+ADD_CXX_WARN_IF(-Wshadow-local)
+if test x"${cxx_has_Wshadow_local}" != xyes; then
+	ADD_CXX_WARN_IF(-Wshadow)
+fi
 ADD_CXX_WARN_IF(-Wvla-extension)
 AC_SUBST([WARNFLAGS_CXX])
 
@@ -94,6 +105,8 @@ AC_SUBST([WARNFLAGS_CXX])
 
 # Checks for header files.
 AC_CHECK_HEADERS([bsd/bsd.h])
+AC_CHECK_HEADERS([bsd/stdio.h])
+AC_CHECK_HEADERS([byteswap.h])
 AC_CHECK_HEADERS([endian.h])
 AC_CHECK_HEADERS([histedit.h])
 AC_CHECK_HEADERS([kqueue/sys/event.h])
@@ -103,6 +116,8 @@ AC_CHECK_HEADERS([sys/event.h])
 AC_CHECK_HEADERS([net/bpf.h])
 AC_CHECK_HEADERS([net/if_tap.h])
 AC_CHECK_HEADERS([linux/if_tun.h])
+AC_CHECK_HEADERS([libkern/OSByteOrder.h])
+AC_CHECK_HEADERS([machine/endian.h])
 
 # Linux で <kqueue/sys/event.h> がなければここで停止したほうがいい
 case "${host_os}" in
@@ -128,64 +143,74 @@ AC_CHECK_HEADER_STDBOOL
 #AC_TYPE_UINT8_T
 
 AC_MSG_CHECKING(for __builtin_assume)
-AC_TRY_COMPILE(,
-	[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],
+	[[
 		__builtin_assume(1);
-	],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE___BUILTIN_ASSUME]),
-	AC_MSG_RESULT([no]))
+	]])], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE___BUILTIN_ASSUME)
+	], [
+		AC_MSG_RESULT(no)
+	])
 
 AC_MSG_CHECKING(for __builtin_bswap16)
-AC_TRY_COMPILE(,
-	[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],
+	[[
 		return __builtin_bswap16(0);
-	],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE___BUILTIN_BSWAP16]),
-	AC_MSG_RESULT([no]))
+	]])], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE___BUILTIN_BSWAP16)
+	], [
+		AC_MSG_RESULT(no)
+	])
 
 AC_MSG_CHECKING(for __builtin_bswap32)
-AC_TRY_COMPILE(,
-	[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],
+	[[
 		return __builtin_bswap32(0);
-	],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE___BUILTIN_BSWAP32]),
-	AC_MSG_RESULT([no]))
+	]])], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE___BUILTIN_BSWAP32)
+	], [
+		AC_MSG_RESULT(no)
+	])
 
 AC_MSG_CHECKING(for __builtin_bswap64)
-AC_TRY_COMPILE(,
-	[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]],
+	[[
 		return __builtin_bswap64(0);
-	],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE___BUILTIN_BSWAP64]),
-	AC_MSG_RESULT([no]))
+	]])], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE___BUILTIN_BSWAP64)
+	], [
+		AC_MSG_RESULT(no)
+	])
 
 AC_MSG_CHECKING(for __builtin_expect)
-AC_TRY_COMPILE(,
-	[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
 		if (__builtin_expect(1, 1)) return 0;
-	],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE___BUILTIN_EXPECT]),
-	AC_MSG_RESULT([no]))
+	]])], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE___BUILTIN_EXPECT)
+	], [
+		AC_MSG_RESULT(no)
+	])
 
 AC_MSG_CHECKING(for __builtin_unreachable)
-AC_TRY_COMPILE(,
-	[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
 		__builtin_unreachable();
-	],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE___BUILTIN_UNREACHABLE]),
-	AC_MSG_RESULT([no]))
+	]])], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE___BUILTIN_UNREACHABLE)
+	], [
+		AC_MSG_RESULT(no)
+	])
 
 AC_MSG_CHECKING(for __attribute__((__fallthrough__)))
 old_CXXFLAGS="${CXXFLAGS}"
 CXXFLAGS="${CXXFLAGS} -Wall -Werror"
-AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
-	[], [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
+	[
 		extern int x;
 		switch (x) {
 		 case 0:
@@ -193,10 +218,12 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 		 case 1:
 			break;
 		}
-	])],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE___ATTRIBUTE_FALLTHROUGH]),
-	AC_MSG_RESULT([no]))
+	])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE___ATTRIBUTE_FALLTHROUGH])
+	], [
+		AC_MSG_RESULT([no])
+	])
 CXXFLAGS="${old_CXXFLAGS}"
 
 dnl とりあえず __format__ までしか調べてないので、
@@ -208,11 +235,12 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 	[
 		extern int f(const char *f, ...)
 			__attribute__((__format__(__printf__, 1, 2)));
+	], [])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE___ATTRIBUTE_FORMAT])
 	], [
-	])],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE___ATTRIBUTE_FORMAT]),
-	AC_MSG_RESULT([no]))
+		AC_MSG_RESULT([no])
+	])
 CXXFLAGS="${old_CXXFLAGS}"
 
 AC_MSG_CHECKING(for __attribute__((no_sanitize)))
@@ -222,124 +250,313 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 	[
 		__attribute__((no_sanitize("undefined")))
 		int func() { return 0; }
+	], [])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE___ATTRIBUTE_NO_SANITIZE])
 	], [
-	])],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE___ATTRIBUTE_NO_SANITIZE]),
-	AC_MSG_RESULT([no]))
+		AC_MSG_RESULT([no])
+	])
 CXXFLAGS="${old_CXXFLAGS}"
 
 
 AC_MSG_CHECKING(for __attribute__((__packed__)))
 old_CXXFLAGS="${CXXFLAGS}"
 CXXFLAGS="${CXXFLAGS} -Werror"
-AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
-	[], [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
+	[
 		struct x { char a; int b; } __attribute__((__packed__));
-	])],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE___ATTRIBUTE_PACKED]),
-	AC_MSG_RESULT([no]))
+	])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE___ATTRIBUTE_PACKED])
+	], [
+		AC_MSG_RESULT([no])
+	])
 CXXFLAGS="${old_CXXFLAGS}"
 
 AC_MSG_CHECKING(for __attribute__((__unused__)))
 old_CXXFLAGS="${CXXFLAGS}"
 CXXFLAGS="${CXXFLAGS} -Wunused-variable -Werror"
-AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
-	[], [
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],
+	[
 		int a __attribute__((__unused__));
-	])],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE___ATTRIBUTE_UNUSED]),
-	AC_MSG_RESULT([no]))
+	])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE___ATTRIBUTE_UNUSED])
+	], [
+		AC_MSG_RESULT([no])
+	])
 CXXFLAGS="${old_CXXFLAGS}"
 
 # Checks for library functions.
 #AC_FUNC_MALLOC
 #AC_FUNC_MMAP
 
-AC_MSG_CHECKING(for pthread_setname_np(name))
-AC_TRY_COMPILE(
-	[
+AC_MSG_CHECKING(for bswap16)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+		#if defined(HAVE_SYS_ENDIAN_H)
+		#include <sys/endian.h>
+		#endif
+	], [
+		bswap16(0);
+	])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE_BSWAP16])
+	], [
+		AC_MSG_RESULT([no])
+	])
+
+AC_MSG_CHECKING(for bswap32)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+		#if defined(HAVE_SYS_ENDIAN_H)
+		#include <sys/endian.h>
+		#endif
+	], [
+		bswap32(0);
+	])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE_BSWAP32])
+	], [
+		AC_MSG_RESULT([no])
+	])
+
+AC_MSG_CHECKING(for bswap64)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+		#if defined(HAVE_SYS_ENDIAN_H)
+		#include <sys/endian.h>
+		#endif
+	], [
+		bswap64(0);
+	])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE_BSWAP64])
+	], [
+		AC_MSG_RESULT([no])
+	])
+
+AC_MSG_CHECKING(for bswap_16)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+		#if defined(HAVE_BYTESWAP_H)
+		#include <byteswap.h>
+		#endif
+	], [
+		bswap_16(0);
+	])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE_BSWAP_16])
+	], [
+		AC_MSG_RESULT([no])
+	])
+
+AC_MSG_CHECKING(for bswap_32)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+		#if defined(HAVE_BYTESWAP_H)
+		#include <byteswap.h>
+		#endif
+	], [
+		bswap_32(0);
+	])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE_BSWAP_32])
+	], [
+		AC_MSG_RESULT([no])
+	])
+
+AC_MSG_CHECKING(for bswap_64)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+		#if defined(HAVE_BYTESWAP_H)
+		#include <byteswap.h>
+		#endif
+	], [
+		bswap_64(0);
+	])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE_BSWAP_64])
+	], [
+		AC_MSG_RESULT([no])
+	])
+
+AC_MSG_CHECKING(for swap16)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+		#if defined(HAVE_SYS_ENDIAN_H)
+		#include <sys/endian.h>
+		#endif
+	], [
+		swap16(0);
+	])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE_SWAP16])
+	], [
+		AC_MSG_RESULT([no])
+	])
+
+AC_MSG_CHECKING(for swap32)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+		#if defined(HAVE_SYS_ENDIAN_H)
+		#include <sys/endian.h>
+		#endif
+	], [
+		swap32(0);
+	])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE_SWAP32])
+	], [
+		AC_MSG_RESULT([no])
+	])
+
+AC_MSG_CHECKING(for swap64)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+		#if defined(HAVE_SYS_ENDIAN_H)
+		#include <sys/endian.h>
+		#endif
+	], [
+		swap64(0);
+	])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE_SWAP64])
+	], [
+		AC_MSG_RESULT([no])
+	])
+
+AC_MSG_CHECKING(for htobe16)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
+		#if defined(HAVE_ENDIAN_H)
+		#include <endian.h>
+		#endif
+		#if defined(HAVE_SYS_ENDIAN_H)
+		#include <sys/endian.h>
+		#endif
+		#if defined(HAVE_MACHINE_ENDIAN_H)
+		#include <machine/endian.h>
+		#endif
+	], [
+		htobe16(0);
+	])], [
+		AC_MSG_RESULT([yes])
+		AC_DEFINE([HAVE_HTOBE16])
+	], [
+		AC_MSG_RESULT([no])
+	])
+
+AC_MSG_CHECKING(for pthread_getname_np)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 		#include <pthread.h>
 		#if defined(HAVE_PTHREAD_NP_H)
 		#include <pthread_np.h>
 		#endif
+	]], [[
+		char name[32];
+		pthread_getname_np(pthread_self(), name, sizeof(name));
+	]])], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_PTHREAD_GETNAME_NP)
 	], [
+		AC_MSG_RESULT(no)
+	])
+
+AC_MSG_CHECKING(for pthread_get_name_np)
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+		#include <pthread.h>
+		#if defined(HAVE_PTHREAD_NP_H)
+		#include <pthread_np.h>
+		#endif
+	]], [[
+		char name[32];
+		pthread_get_name_np(pthread_self(), name, sizeof(name));
+	]])], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_PTHREAD_GET_NAME_NP)
+	], [
+		AC_MSG_RESULT(no)
+	])
+
+AC_MSG_CHECKING(for pthread_setname_np(name))
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+		#include <pthread.h>
+		#if defined(HAVE_PTHREAD_NP_H)
+		#include <pthread_np.h>
+		#endif
+	]], [[
 		pthread_setname_np("");
-	],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE_PTHREAD_SETNAME_NP_name]),
-	AC_MSG_RESULT([no]))
+	]])], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_PTHREAD_SETNAME_NP_name)
+	], [
+		AC_MSG_RESULT(no)
+	])
 
 AC_MSG_CHECKING(for pthread_setname_np(thread, name))
-AC_TRY_COMPILE(
-	[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 		#include <pthread.h>
 		#if defined(HAVE_PTHREAD_NP_H)
 		#include <pthread_np.h>
 		#endif
-	], [
+	]], [[
 		pthread_setname_np(pthread_self(), "");
-	],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE_PTHREAD_SETNAME_NP_th_name]),
-	AC_MSG_RESULT([no]))
+	]])], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_PTHREAD_SETNAME_NP_th_name)
+	], [
+		AC_MSG_RESULT(no)
+	])
 
 AC_MSG_CHECKING(for pthread_setname_np(thread, name, arg))
-AC_TRY_COMPILE(
-	[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 		#include <pthread.h>
 		#if defined(HAVE_PTHREAD_NP_H)
 		#include <pthread_np.h>
 		#endif
-	], [
+	]], [[
 		pthread_setname_np(pthread_self(), "", (void*)0);
-	],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE_PTHREAD_SETNAME_NP_th_name_arg]),
-	AC_MSG_RESULT([no]))
+	]])], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_PTHREAD_SETNAME_NP_th_name_arg)
+	], [
+		AC_MSG_RESULT(no)
+	])
 
 AC_MSG_CHECKING(for pthread_set_name_np(thread, name))
-AC_TRY_COMPILE(
-	[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 		#include <pthread.h>
 		#if defined(HAVE_PTHREAD_NP_H)
 		#include <pthread_np.h>
 		#endif
-	], [
+	]], [[
 		pthread_set_name_np(pthread_self(), "");
-	],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE_PTHREAD_SET_NAME_NP_th_name]),
-	AC_MSG_RESULT([no]))
+	]])],[
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_PTHREAD_SET_NAME_NP_th_name)
+	], [
+		AC_MSG_RESULT(no)
+	])
 
 AC_MSG_CHECKING(for iconv const)
-AC_TRY_COMPILE(
-	[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 		#include <iconv.h>
-	], [
+	]], [[
 		const char **a;
 		iconv(0, a, 0, 0, 0);
-	],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE_ICONV_CONST]),
-	AC_MSG_RESULT([no]))
+	]])], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_ICONV_CONST)
+	], [
+		AC_MSG_RESULT(no)
+	])
 
 #
 # Network
 #
 AC_MSG_CHECKING(for AF_PACKET)
-AC_TRY_COMPILE(
-	[
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
 		#include <sys/socket.h>
-	], [
+	]], [[
 		AF_PACKET;
-	],
-	AC_MSG_RESULT([yes])
-		AC_DEFINE([HAVE_HOSTNET_AFPACKET])
-		AC_SUBST([HOSTNET_AFPACKET], [yes]),
-	AC_MSG_RESULT([no]))
+	]])], [
+		AC_MSG_RESULT(yes)
+		AC_DEFINE(HAVE_HOSTNET_AFPACKET)
+		AC_SUBST(HOSTNET_AFPACKET, yes)
+	], [
+		AC_MSG_RESULT(no)
+	])
 
 AC_MSG_CHECKING(for tap(4))
 case "${host_os}" in
@@ -390,9 +607,10 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 		#endif
 	], [
 		getprogname()
-	])],
+	])], [
 	# nothing to do on success
-	, [AC_MSG_ERROR([*** getprogname is not found.
+	], [
+		AC_MSG_ERROR([*** getprogname is not found.
 *** If you use Ubuntu, sudo apt install libbsd-dev])
 	]
 )
@@ -414,53 +632,63 @@ AC_CHECK_LIB(z, gzclose,
 )
 
 # wxWidgets
-AC_MSG_CHECKING(for wx-config)
-wxconfig_paths="${WX_CONFIG} wx-config-3.0 wx-config"
-wxconfig=""
-for c in ${wxconfig_paths}; do
-	ver=`$c --version 2>&1 | cut -f 1 -d .`
-	if test "$ver" = "3"; then
-		wxconfig=$c
-		break
-	fi
-done
-if test -z "$wxconfig"; then
-	AC_MSG_ERROR([*** wxWidgets-3.0 not found in ${wxconfig_paths}
+AC_ARG_WITH([gui],
+	[AS_HELP_STRING([--without-gui], [disable GUI support])],
+	[],
+	[with_gui=yes])
+
+AS_IF([test "x$with_gui" != xno], [
+	AC_MSG_CHECKING(for wx-config)
+	wxconfig_paths="${WX_CONFIG} wx-config-3.0 wx-config"
+	wxconfig=""
+	for c in ${wxconfig_paths}; do
+		ver=`$c --version 2>&1 | cut -f 1 -d .`
+		if test "$ver" = "3"; then
+			wxconfig=$c
+			break
+		fi
+	done
+	if test -z "$wxconfig"; then
+		AC_MSG_ERROR([*** wxWidgets-3.0 not found in ${wxconfig_paths}
 *** If you use pkgsrc, install x11/wxGTK30.
 *** If you use Ubuntu, sudo apt install libwxgtk3.0-gtk3-dev])
-else
-	AC_MSG_RESULT([$wxconfig])
+	else
+		AC_MSG_RESULT([$wxconfig])
 
-	AC_MSG_CHECKING(for wxWidgets version)
-	wxversion=`$wxconfig --version`
-	AC_MSG_RESULT([$wxversion])
-
-	wxcppflags=`$wxconfig --cppflags`
-	wxlibs=`$wxconfig --libs`
-
-	case "${host_os}" in
-	 netbsd*)
-		# rpath。どうしたもんだかこれ
-		wxlibs=[`echo $wxlibs | sed -e 's/-L\([^ ]*\) /-L\1 -Wl,-R,\1 /'`]
-		;;
-
-	 darwin*)
-		# XXX -framework AudioToolbox が指定されているとリンカがこけるorz
-		wxlibs=[`echo $wxlibs | sed -e 's/-framework AudioToolbox//'`]
-		;;
-	esac
-
-	AC_SUBST([WXWIDGETS_CPPFLAGS], [$wxcppflags])
-	AC_SUBST([WXWIDGETS_LIBS], [$wxlibs])
-fi
+		AC_MSG_CHECKING(for wxWidgets version)
+		wxversion=`$wxconfig --version`
+		AC_MSG_RESULT([$wxversion])
+
+		wxcppflags=`$wxconfig --cppflags`
+		wxlibs=`$wxconfig --libs`
+
+		case "${host_os}" in
+		 netbsd*)
+			# rpath。どうしたもんだかこれ
+			wxlibs=[`echo $wxlibs | sed -e 's/-L\([^ ]*\) /-L\1 -Wl,-R,\1 /'`]
+			;;
+
+		 darwin*)
+			# XXX -framework AudioToolbox が指定されているとリンカがこけるorz
+			wxlibs=[`echo $wxlibs | sed -e 's/-framework AudioToolbox//'`]
+			;;
+		esac
+
+		AC_SUBST([WITH_GUI], [yes])
+		AC_SUBST([WXWIDGETS_CPPFLAGS], [$wxcppflags])
+		AC_SUBST([WXWIDGETS_LIBS], [$wxlibs])
+	fi
 
-# gettext
-AC_CHECK_TOOL([MSGFMT], [msgfmt], [:])
-if test $MSGFMT = [:]; then
-	AC_MSG_ERROR([*** msgfmt not found.
+	# gettext
+	AC_CHECK_TOOL([MSGFMT], [msgfmt], [:])
+	if test $MSGFMT = [:]; then
+		AC_MSG_ERROR([*** msgfmt not found.
 *** If you use pkgsrc, install devel/gettext-tools.
 *** If you use Ubuntu, sudo apt install gettext])
-fi
+	fi
+], [
+	AC_SUBST([WITH_GUI], [no])
+])
 
 AC_CONFIG_FILES([Makefile.cfg
 	host/Makefile