gdb/gdbserver/configure.ac

   1 dnl Autoconf configure script for GDB server.
   2 dnl Copyright (C) 2000, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
   3 dnl 2010 Free Software Foundation, Inc.
   4 dnl
   5 dnl This file is part of GDB.
   6 dnl
   7 dnl This program is free software; you can redistribute it and/or modify
   8 dnl it under the terms of the GNU General Public License as published by
   9 dnl the Free Software Foundation; either version 3 of the License, or
  10 dnl (at your option) any later version.
  11 dnl
  12 dnl This program is distributed in the hope that it will be useful,
  13 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 dnl GNU General Public License for more details.
  16 dnl
  17 dnl You should have received a copy of the GNU General Public License
  18 dnl along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 dnl Process this file with autoconf to produce a configure script.
  21
  22 AC_PREREQ(2.59)dnl
  23
  24 AC_INIT(server.c)
  25 AC_CONFIG_HEADER(config.h:config.in)
  26 AC_CONFIG_LIBOBJ_DIR(../gnulib)
  27
  28 AC_PROG_CC
  29 AC_GNU_SOURCE
  30
  31 AC_CANONICAL_SYSTEM
  32
  33 AC_PROG_INSTALL
  34
  35 AC_ARG_PROGRAM
  36
  37 AC_HEADER_STDC
  38
  39 AC_CHECK_HEADERS(sgtty.h termio.h termios.h sys/reg.h string.h dnl
  40                  proc_service.h sys/procfs.h thread_db.h linux/elf.h dnl
  41                  stdlib.h unistd.h dnl
  42                  errno.h fcntl.h signal.h sys/file.h malloc.h dnl
  43                  sys/ioctl.h netinet/in.h sys/socket.h netdb.h dnl
  44                  netinet/tcp.h arpa/inet.h sys/wait.h)
  45 AC_CHECK_FUNCS(pread pwrite pread64)
  46 AC_REPLACE_FUNCS(memmem)
  47
  48 dnl dladdr is glibc-specific.  It is used by thread-db.c but only for
  49 dnl debugging messages.  It lives in -ldl which is handled below so we don't
  50 dnl use AC_CHECK_LIB (or AC_SEARCH_LIBS) here.  Instead we just temporarily
  51 dnl augment LIBS.
  52 old_LIBS="$LIBS"
  53 LIBS="$LIBS -ldl"
  54 AC_CHECK_FUNCS(dladdr)
  55 LIBS="$old_LIBS"
  56
  57 have_errno=no
  58 AC_MSG_CHECKING(for errno)
  59 AC_TRY_LINK([
  60 #if HAVE_ERRNO_H
  61 #include <errno.h>
  62 #endif], [static int x; x = errno;],
  63   [AC_MSG_RESULT(yes - in errno.h); AC_DEFINE(HAVE_ERRNO, 1, [Define if errno is available]) have_errno=yes])
  64 if test $have_errno = no; then
  65 AC_TRY_LINK([
  66 #if HAVE_ERRNO_H
  67 #include <errno.h>
  68 #endif], [extern int errno; static int x; x = errno;],
  69   [AC_MSG_RESULT(yes - must define); AC_DEFINE(HAVE_ERRNO, 1, [Define if errno is available]) AC_DEFINE(MUST_DEFINE_ERRNO, 1, [Checking if errno must be defined])],
  70   [AC_MSG_RESULT(no)])
  71 fi
  72
  73 AC_CHECK_DECLS([strerror, perror, memmem])
  74
  75 AC_CHECK_TYPES(socklen_t, [], [],
  76 [#include <sys/types.h>
  77 #include <sys/socket.h>
  78 ])
  79
  80 ACX_PKGVERSION([GDB])
  81 ACX_BUGURL([http://www.gnu.org/software/gdb/bugs/])
  82 AC_DEFINE_UNQUOTED([PKGVERSION], ["$PKGVERSION"], [Additional package description])
  83 AC_DEFINE_UNQUOTED([REPORT_BUGS_TO], ["$REPORT_BUGS_TO"], [Bug reporting address])
  84
  85 # Check for various supplementary target information (beyond the
  86 # triplet) which might affect the choices in configure.srv.
  87 case "${target}" in
  88 changequote(,)dnl
  89   i[34567]86-*-linux*)
  90 changequote([,])dnl
  91     AC_CACHE_CHECK([if building for x86-64], [gdb_cv_i386_is_x86_64],
  92                    [save_CPPFLAGS="$CPPFLAGS"
  93                     CPPFLAGS="$CPPFLAGS $CFLAGS"
  94                     AC_EGREP_CPP([got it], [
  95 #if __x86_64__
  96 got it
  97 #endif
  98                  ], [gdb_cv_i386_is_x86_64=yes],
  99                     [gdb_cv_i386_is_x86_64=no])
 100                     CPPFLAGS="$save_CPPFLAGS"])
 101     ;;
 102   m68k-*-*)
 103     AC_CACHE_CHECK([if building for Coldfire], [gdb_cv_m68k_is_coldfire],
 104                    [save_CPPFLAGS="$CPPFLAGS"
 105                     CPPFLAGS="$CPPFLAGS $CFLAGS"
 106                     AC_EGREP_CPP([got it], [
 107 #ifdef __mcoldfire__
 108 got it
 109 #endif
 110                  ], [gdb_cv_m68k_is_coldfire=yes],
 111                     [gdb_cv_m68k_is_coldfire=no])
 112                     CPPFLAGS="$save_CPPFLAGS"])
 113     ;;
 114 esac
 115
 116 . ${srcdir}/configure.srv
 117
 118 if test "${srv_mingwce}" = "yes"; then
 119   LIBS="$LIBS -lws2"
 120 elif test "${srv_mingw}" = "yes"; then
 121   LIBS="$LIBS -lws2_32"
 122 elif test "${srv_qnx}" = "yes"; then
 123   LIBS="$LIBS -lsocket"
 124 fi
 125
 126 if test "${srv_mingw}" = "yes"; then
 127   AC_DEFINE(USE_WIN32API, 1,
 128             [Define if we should use the Windows API, instead of the
 129              POSIX API.  On Windows, we use the Windows API when
 130              building for MinGW, but the POSIX API when building
 131              for Cygwin.])
 132 fi
 133
 134 if test "${srv_linux_usrregs}" = "yes"; then
 135   AC_DEFINE(HAVE_LINUX_USRREGS, 1,
 136             [Define if the target supports PTRACE_PEEKUSR for register ]
 137             [access.])
 138 fi
 139
 140 if test "${srv_linux_regsets}" = "yes"; then
 141   AC_DEFINE(HAVE_LINUX_REGSETS, 1,
 142             [Define if the target supports register sets.])
 143
 144   AC_MSG_CHECKING(for PTRACE_GETREGS)
 145   AC_CACHE_VAL(gdbsrv_cv_have_ptrace_getregs,
 146   [AC_TRY_COMPILE([#include <sys/ptrace.h>],
 147                   [PTRACE_GETREGS;],
 148                   [gdbsrv_cv_have_ptrace_getregs=yes],
 149                   [gdbsrv_cv_have_ptrace_getregs=no])])
 150   AC_MSG_RESULT($gdbsrv_cv_have_ptrace_getregs)
 151   if test "${gdbsrv_cv_have_ptrace_getregs}" = "yes"; then
 152     AC_DEFINE(HAVE_PTRACE_GETREGS, 1,
 153               [Define if the target supports PTRACE_GETREGS for register ]
 154               [access.])
 155   fi
 156
 157   AC_MSG_CHECKING(for PTRACE_GETFPXREGS)
 158   AC_CACHE_VAL(gdbsrv_cv_have_ptrace_getfpxregs,
 159   [AC_TRY_COMPILE([#include <sys/ptrace.h>],
 160                   [PTRACE_GETFPXREGS;],
 161                   [gdbsrv_cv_have_ptrace_getfpxregs=yes],
 162                   [gdbsrv_cv_have_ptrace_getfpxregs=no])])
 163   AC_MSG_RESULT($gdbsrv_cv_have_ptrace_getfpxregs)
 164   if test "${gdbsrv_cv_have_ptrace_getfpxregs}" = "yes"; then
 165     AC_DEFINE(HAVE_PTRACE_GETFPXREGS, 1,
 166               [Define if the target supports PTRACE_GETFPXREGS for extended ]
 167               [register access.])
 168   fi
 169 fi
 170
 171 if test "$ac_cv_header_sys_procfs_h" = yes; then
 172   BFD_HAVE_SYS_PROCFS_TYPE(lwpid_t)
 173   BFD_HAVE_SYS_PROCFS_TYPE(psaddr_t)
 174   BFD_HAVE_SYS_PROCFS_TYPE(prgregset_t)
 175   BFD_HAVE_SYS_PROCFS_TYPE(elf_fpregset_t)
 176 fi
 177
 178 dnl Check for libdl, but do not add it to LIBS as only gdbserver
 179 dnl needs it (and gdbreplay doesn't).
 180 old_LIBS="$LIBS"
 181 AC_CHECK_LIB(dl, dlopen)
 182 LIBS="$old_LIBS"
 183
 184 srv_thread_depfiles=
 185 srv_libs=
 186 USE_THREAD_DB=
 187
 188 if test "$srv_linux_thread_db" = "yes"; then
 189   if test "$ac_cv_lib_dl_dlopen" = "yes"; then
 190     srv_libs="-ldl"
 191     AC_MSG_CHECKING(for the dynamic export flag)
 192     old_LDFLAGS="$LDFLAGS"
 193     # Older GNU ld supports --export-dynamic but --dynamic-list may not be
 194     # supported there.
 195     RDYNAMIC="-Wl,--dynamic-list=${srcdir}/proc-service.list"
 196     LDFLAGS="$LDFLAGS $RDYNAMIC"
 197     AC_TRY_LINK([], [],
 198                 [found="-Wl,--dynamic-list"
 199                  RDYNAMIC='-Wl,--dynamic-list=$(srcdir)/proc-service.list'],
 200                 [RDYNAMIC="-rdynamic"
 201                  LDFLAGS="$old_LDFLAGS $RDYNAMIC"
 202                  AC_TRY_LINK([], [],
 203                              [found="-rdynamic"],
 204                              [found="no"
 205                               RDYNAMIC=""])])
 206     AC_SUBST(RDYNAMIC)
 207     LDFLAGS="$old_LDFLAGS"
 208     AC_MSG_RESULT($found)
 209   else
 210     srv_libs="-lthread_db"
 211   fi
 212
 213   srv_thread_depfiles="thread-db.o proc-service.o"
 214   USE_THREAD_DB="-DUSE_THREAD_DB"
 215   AC_CACHE_CHECK([for TD_VERSION], gdbsrv_cv_have_td_version,
 216   [AC_TRY_COMPILE([#include <thread_db.h>], [TD_VERSION;],
 217                   [gdbsrv_cv_have_td_version=yes],
 218                   [gdbsrv_cv_have_td_version=no])])
 219   if test $gdbsrv_cv_have_td_version = yes; then
 220     AC_DEFINE(HAVE_TD_VERSION, 1, [Define if TD_VERSION is available.])
 221   fi
 222 fi
 223
 224 AC_ARG_WITH(libthread-db,
 225 AS_HELP_STRING([--with-libthread-db=PATH], [use given libthread_db directly]),
 226 [srv_libthread_db_path="${withval}"
 227   srv_libs="$srv_libthread_db_path"
 228 ])
 229
 230 if test "$srv_libs" != "" -a "$srv_libs" != "-ldl"; then
 231   AC_DEFINE(USE_LIBTHREAD_DB_DIRECTLY, 1, [Define if we should use libthread_db directly.])
 232 fi
 233
 234 if test "$srv_xmlfiles" != ""; then
 235   srv_xmlbuiltin="xml-builtin.o"
 236   AC_DEFINE(USE_XML, 1, [Define if an XML target description is available.])
 237
 238   tmp_xmlfiles=$srv_xmlfiles
 239   srv_xmlfiles=""
 240   for f in $tmp_xmlfiles; do
 241     srv_xmlfiles="$srv_xmlfiles \$(XML_DIR)/$f"
 242   done
 243 fi
 244
 245 GDBSERVER_DEPFILES="$srv_regobj $srv_tgtobj $srv_hostio_err_objs $srv_thread_depfiles"
 246 GDBSERVER_LIBS="$srv_libs"
 247
 248 dnl Check whether the target supports __sync_*_compare_and_swap.
 249 AC_CACHE_CHECK([whether the target supports __sync_*_compare_and_swap],
 250                 gdbsrv_cv_have_sync_builtins, [
 251 AC_TRY_LINK([], [int foo, bar; bar = __sync_val_compare_and_swap(&foo, 0, 1);],
 252                 gdbsrv_cv_have_sync_builtins=yes,
 253                 gdbsrv_cv_have_sync_builtins=no)])
 254 if test $gdbsrv_cv_have_sync_builtins = yes; then
 255   AC_DEFINE(HAVE_SYNC_BUILTINS, 1,
 256     [Define to 1 if the target supports __sync_*_compare_and_swap])
 257 fi
 258
 259 dnl Check for -fvisibility=hidden support in the compiler.
 260 saved_cflags="$CFLAGS"
 261 CFLAGS="$CFLAGS -fvisibility=hidden"
 262 AC_COMPILE_IFELSE(AC_LANG_PROGRAM([]),
 263                         [gdbsrv_cv_have_visibility_hidden=yes],
 264                         [gdbsrv_cv_have_visibility_hidden=no])
 265 CFLAGS="$saved_cflags"
 266
 267 IPA_DEPFILES=""
 268
 269 # Rather than allowing to build a broken IPA, we simply disable it if
 270 # we don't find a compiler supporting all the features we need.
 271 if test "$ipa_obj" != "" \
 272    -a "$gdbsrv_cv_have_sync_builtins" = yes \
 273    -a "$gdbsrv_cv_have_visibility_hidden" = yes; then
 274    IPA_DEPFILES="$ipa_obj"
 275    extra_libraries="libinproctrace.so"
 276 fi
 277
 278 AC_SUBST(GDBSERVER_DEPFILES)
 279 AC_SUBST(GDBSERVER_LIBS)
 280 AC_SUBST(USE_THREAD_DB)
 281 AC_SUBST(srv_xmlbuiltin)
 282 AC_SUBST(srv_xmlfiles)
 283 AC_SUBST(IPA_DEPFILES)
 284 AC_SUBST(extra_libraries)
 285
 286 AC_OUTPUT(Makefile,
 287 [case x$CONFIG_HEADERS in
 288 xconfig.h:config.in)
 289 echo > stamp-h ;;
 290 esac
 291 ])