1 dnl Copyright (C) 1997-2024 Free Software Foundation, Inc.
3 dnl This program is free software; you can redistribute it and/or modify
4 dnl it under the terms of the GNU General Public License as published by
5 dnl the Free Software Foundation; either version 3 of the License, or
6 dnl (at your option) any later version.
8 dnl This program is distributed in the hope that it will be useful,
9 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
10 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 dnl GNU General Public License for more details.
13 dnl You should have received a copy of the GNU General Public License
14 dnl along with this program. If not, see <http://www.gnu.org/licenses/>.
16 dnl Check for various platform settings.
17 AC_DEFUN([SIM_AC_PLATFORM],
19 dnl Check for common headers.
20 dnl NB: You can assume C11 headers exist.
21 dnl NB: We use gnulib from ../gnulib/, so we don't probe headers it provides.
22 AC_CHECK_HEADERS_ONCE(m4_flatten([
48 dnl NB: We use gnulib from ../gnulib/, so we don't probe functions it provides.
49 AC_CHECK_FUNCS_ONCE(m4_flatten([
120 AC_CHECK_MEMBERS([[struct stat.st_dev], [struct stat.st_ino],
121 [struct stat.st_mode], [struct stat.st_nlink], [struct stat.st_uid],
122 [struct stat.st_gid], [struct stat.st_rdev], [struct stat.st_size],
123 [struct stat.st_blksize], [struct stat.st_blocks], [struct stat.st_atime],
124 [struct stat.st_mtime], [struct stat.st_ctime]], [], [],
125 [[#ifdef HAVE_SYS_TYPES_H
126 #include <sys/types.h>
128 #include <sys/stat.h>]])
130 AC_CHECK_TYPES([__int128])
131 AC_CHECK_TYPES(socklen_t, [], [],
132 [#include <sys/types.h>
133 #include <sys/socket.h>
136 AC_CHECK_SIZEOF([void *])
138 dnl Check for struct statfs.
139 AC_CACHE_CHECK([for struct statfs],
140 [sim_cv_struct_statfs],
142 #include <sys/types.h>
143 #ifdef HAVE_SYS_PARAM_H
144 #include <sys/param.h>
146 #ifdef HAVE_SYS_MOUNT_H
147 #include <sys/mount.h>
149 #ifdef HAVE_SYS_VFS_H
152 #ifdef HAVE_SYS_STATFS_H
153 #include <sys/statfs.h>
156 ], [sim_cv_struct_statfs="yes"], [sim_cv_struct_statfs="no"])])
157 AS_IF([test x"sim_cv_struct_statfs" = x"yes"], [dnl
158 AC_DEFINE(HAVE_STRUCT_STATFS, 1,
159 [Define if struct statfs is defined in <sys/mount.h>])
162 dnl Some System V related checks.
163 AC_CACHE_CHECK([if union semun defined],
164 [sim_cv_has_union_semun],
166 #include <sys/types.h>
168 #include <sys/sem.h>], [
170 ], [sim_cv_has_union_semun="yes"], [sim_cv_has_union_semun="no"])])
171 AS_IF([test x"$sim_cv_has_union_semun" = x"yes"], [dnl
172 AC_DEFINE(HAVE_UNION_SEMUN, 1,
173 [Define if union semun is defined in <sys/sem.h>])
176 AC_CACHE_CHECK([whether System V semaphores are supported],
179 #include <sys/types.h>
182 #ifndef HAVE_UNION_SEMUN
185 struct semid_ds *buf;
190 int id = semget(IPC_PRIVATE, 1, IPC_CREAT|0400);
193 arg.val = 0; /* avoid implicit type cast to union */
194 if (semctl(id, 0, IPC_RMID, arg) == -1)
196 ], [sim_cv_sysv_sem="yes"], [sim_cv_sysv_sem="no"])])
197 AS_IF([test x"$sim_cv_sysv_sem" = x"yes"], [dnl
198 AC_DEFINE(HAVE_SYSV_SEM, 1, [Define if System V semaphores are supported])
201 AC_CACHE_CHECK([whether System V shared memory is supported],
204 #include <sys/types.h>
206 #include <sys/shm.h>], [
207 int id = shmget(IPC_PRIVATE, 1, IPC_CREAT|0400);
210 if (shmctl(id, IPC_RMID, 0) == -1)
212 ], [sim_cv_sysv_shm="yes"], [sim_cv_sysv_shm="no"])])
213 AS_IF([test x"$sim_cv_sysv_shm" = x"yes"], [dnl
214 AC_DEFINE(HAVE_SYSV_SHM, 1, [Define if System V shared memory is supported])
217 dnl Figure out what type of termio/termios support there is
218 AC_CACHE_CHECK([for struct termios],
219 [sim_cv_termios_struct],
221 #include <sys/types.h>
222 #include <sys/termios.h>], [
223 static struct termios x;
229 ], [sim_cv_termios_struct="yes"], [sim_cv_termios_struct="no"])])
230 if test $sim_cv_termios_struct = yes; then
231 AC_DEFINE([HAVE_TERMIOS_STRUCTURE], 1, [Define if struct termios exists.])
234 if test "$sim_cv_termios_struct" = "yes"; then
235 AC_CACHE_VAL([sim_cv_termios_cline])
237 [struct termios.c_line],
238 [sim_cv_termios_cline="yes"],
239 [sim_cv_termios_cline="no"], [
240 #include <sys/types.h>
241 #include <sys/termios.h>
243 if test $sim_cv_termios_cline = yes; then
244 AC_DEFINE([HAVE_TERMIOS_CLINE], 1, [Define if struct termios has c_line.])
247 sim_cv_termios_cline=no
250 if test "$sim_cv_termios_struct" != "yes"; then
251 AC_CACHE_CHECK([for struct termio],
252 [sim_cv_termio_struct],
254 #include <sys/types.h>
255 #include <sys/termio.h>], [
256 static struct termio x;
262 ], [sim_cv_termio_struct="yes"], [sim_cv_termio_struct="no"])])
263 if test $sim_cv_termio_struct = yes; then
264 AC_DEFINE([HAVE_TERMIO_STRUCTURE], 1, [Define if struct termio exists.])
267 sim_cv_termio_struct=no
270 if test "$sim_cv_termio_struct" = "yes"; then
271 AC_CACHE_VAL([sim_cv_termio_cline])
273 [struct termio.c_line],
274 [sim_cv_termio_cline="yes"],
275 [sim_cv_termio_cline="no"], [
276 #include <sys/types.h>
277 #include <sys/termio.h>
279 if test $sim_cv_termio_cline = yes; then
280 AC_DEFINE([HAVE_TERMIO_CLINE], 1, [Define if struct termio has c_line.])
283 sim_cv_termio_cline=no
286 dnl Types used by common code
298 AC_SEARCH_LIBS([bind], [socket])
299 AC_SEARCH_LIBS([gethostbyname], [nsl])
300 AC_SEARCH_LIBS([fabs], [m])
301 AC_SEARCH_LIBS([log2], [m])
303 AC_SEARCH_LIBS([dlopen], [dl])
304 if test "${ac_cv_search_dlopen}" = "none required" || test "${ac_cv_lib_dl_dlopen}" = "yes"; then
305 PKG_CHECK_MODULES(SDL, sdl2, [dnl
306 SDL_CFLAGS="${SDL_CFLAGS} -DHAVE_SDL=2"
308 PKG_CHECK_MODULES(SDL, sdl, [dnl
309 SDL_CFLAGS="${SDL_CFLAGS} -DHAVE_SDL=1"
312 dnl If we use SDL, we need dlopen support.
313 AS_IF([test -n "$SDL_CFLAGS"], [dnl
314 AS_IF([test "$ac_cv_search_dlopen" = no], [dnl
315 AC_MSG_WARN([SDL support requires dlopen support])
321 dnl We dlopen the libs at runtime, so never pass down SDL_LIBS.
325 dnl In the Cygwin environment, we need some additional flags.
326 AC_CACHE_CHECK([for cygwin], sim_cv_os_cygwin,
327 [AC_EGREP_CPP(lose, [
330 #endif],[sim_cv_os_cygwin=yes],[sim_cv_os_cygwin=no])])
332 dnl Keep in sync with gdb's configure.ac list.
333 AC_SEARCH_LIBS(tgetent, [termcap tinfo curses ncurses],
334 [TERMCAP_LIB=$ac_cv_search_tgetent], [TERMCAP_LIB=""])
335 if test x$sim_cv_os_cygwin = xyes; then
336 TERMCAP_LIB="${TERMCAP_LIB} -luser32"
338 AC_SUBST(TERMCAP_LIB)
340 dnl We prefer the in-tree readline. Top-level dependencies make sure
341 dnl src/readline (if it's there) is configured before src/sim.
342 if test -r ../readline/Makefile; then
343 READLINE_LIB=../readline/readline/libreadline.a
344 READLINE_CFLAGS='-I$(READLINE_SRC)/..'
346 AC_CHECK_LIB(readline, readline, READLINE_LIB=-lreadline,
347 AC_ERROR([the required "readline" library is missing]), $TERMCAP_LIB)
350 AC_SUBST(READLINE_LIB)
351 AC_SUBST(READLINE_CFLAGS)
353 dnl Determine whether we have a known getopt prototype in unistd.h
354 dnl to make sure that we have correct getopt declaration on
355 dnl include/getopt.h. The purpose of this is to sync with other Binutils
356 dnl components and this logic is copied from ld/configure.ac.
357 AC_MSG_CHECKING(for a known getopt prototype in unistd.h)
358 AC_CACHE_VAL(sim_cv_decl_getopt_unistd_h,
359 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <unistd.h>], [extern int getopt (int, char *const*, const char *);])],
360 sim_cv_decl_getopt_unistd_h=yes, sim_cv_decl_getopt_unistd_h=no)])
361 AC_MSG_RESULT($sim_cv_decl_getopt_unistd_h)
362 if test $sim_cv_decl_getopt_unistd_h = yes; then
363 AC_DEFINE([HAVE_DECL_GETOPT], 1,
364 [Is the prototype for getopt in <unistd.h> in the expected format?])