1 dnl Copyright (C) 1997-2023 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 dnl Types used by common code
148 AC_SEARCH_LIBS([bind], [socket])
149 AC_SEARCH_LIBS([gethostbyname], [nsl])
150 AC_SEARCH_LIBS([fabs], [m])
151 AC_SEARCH_LIBS([log2], [m])
153 AC_SEARCH_LIBS([dlopen], [dl])
154 if test "${ac_cv_search_dlopen}" = "none required" || test "${ac_cv_lib_dl_dlopen}" = "yes"; then
155 PKG_CHECK_MODULES(SDL, sdl2, [dnl
156 SDL_CFLAGS="${SDL_CFLAGS} -DHAVE_SDL=2"
158 PKG_CHECK_MODULES(SDL, sdl, [dnl
159 SDL_CFLAGS="${SDL_CFLAGS} -DHAVE_SDL=1"
162 dnl If we use SDL, we need dlopen support.
163 AS_IF([test -n "$SDL_CFLAGS"], [dnl
164 AS_IF([test "$ac_cv_search_dlopen" = no], [dnl
165 AC_MSG_WARN([SDL support requires dlopen support])
171 dnl We dlopen the libs at runtime, so never pass down SDL_LIBS.
175 dnl In the Cygwin environment, we need some additional flags.
176 AC_CACHE_CHECK([for cygwin], sim_cv_os_cygwin,
177 [AC_EGREP_CPP(lose, [
180 #endif],[sim_cv_os_cygwin=yes],[sim_cv_os_cygwin=no])])
182 dnl Keep in sync with gdb's configure.ac list.
183 AC_SEARCH_LIBS(tgetent, [termcap tinfo curses ncurses],
184 [TERMCAP_LIB=$ac_cv_search_tgetent], [TERMCAP_LIB=""])
185 if test x$sim_cv_os_cygwin = xyes; then
186 TERMCAP_LIB="${TERMCAP_LIB} -luser32"
188 AC_SUBST(TERMCAP_LIB)
190 dnl We prefer the in-tree readline. Top-level dependencies make sure
191 dnl src/readline (if it's there) is configured before src/sim.
192 if test -r ../readline/Makefile; then
193 READLINE_LIB=../readline/readline/libreadline.a
194 READLINE_CFLAGS='-I$(READLINE_SRC)/..'
196 AC_CHECK_LIB(readline, readline, READLINE_LIB=-lreadline,
197 AC_ERROR([the required "readline" library is missing]), $TERMCAP_LIB)
200 AC_SUBST(READLINE_LIB)
201 AC_SUBST(READLINE_CFLAGS)
203 dnl Determine whether we have a known getopt prototype in unistd.h
204 dnl to make sure that we have correct getopt declaration on
205 dnl include/getopt.h. The purpose of this is to sync with other Binutils
206 dnl components and this logic is copied from ld/configure.ac.
207 AC_MSG_CHECKING(for a known getopt prototype in unistd.h)
208 AC_CACHE_VAL(sim_cv_decl_getopt_unistd_h,
209 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <unistd.h>], [extern int getopt (int, char *const*, const char *);])],
210 sim_cv_decl_getopt_unistd_h=yes, sim_cv_decl_getopt_unistd_h=no)])
211 AC_MSG_RESULT($sim_cv_decl_getopt_unistd_h)
212 if test $sim_cv_decl_getopt_unistd_h = yes; then
213 AC_DEFINE([HAVE_DECL_GETOPT], 1,
214 [Is the prototype for getopt in <unistd.h> in the expected format?])