gdbsupport/common.m4

   1 dnl Autoconf configure snippets for common.
   2 dnl Copyright (C) 1995-2020 Free Software Foundation, Inc.
   3 dnl
   4 dnl This file is part of GDB.
   5 dnl
   6 dnl This program is free software; you can redistribute it and/or modify
   7 dnl it under the terms of the GNU General Public License as published by
   8 dnl the Free Software Foundation; either version 3 of the License, or
   9 dnl (at your option) any later version.
  10 dnl
  11 dnl This program is distributed in the hope that it will be useful,
  12 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 dnl GNU General Public License for more details.
  15 dnl
  16 dnl You should have received a copy of the GNU General Public License
  17 dnl along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 dnl Invoke configury needed by the files in 'common'.
  20 AC_DEFUN([GDB_AC_COMMON], [
  21   # Set the 'development' global.
  22   . $srcdir/../bfd/development.sh
  23
  24   AC_HEADER_STDC
  25   AC_FUNC_ALLOCA
  26
  27   WIN32APILIBS=
  28   case ${host} in
  29     *mingw32*)
  30       AC_DEFINE(USE_WIN32API, 1,
  31                 [Define if we should use the Windows API, instead of the
  32                  POSIX API.  On Windows, we use the Windows API when
  33                  building for MinGW, but the POSIX API when building
  34                  for Cygwin.])
  35       WIN32APILIBS="-lws2_32"
  36       ;;
  37   esac
  38
  39   dnl Note that this requires codeset.m4, which is included
  40   dnl by the users of common.m4.
  41   AM_LANGINFO_CODESET
  42
  43   AC_CHECK_HEADERS(linux/perf_event.h locale.h memory.h signal.h dnl
  44                    sys/resource.h sys/socket.h dnl
  45                    sys/un.h sys/wait.h dnl
  46                    thread_db.h wait.h dnl
  47                    termios.h dnl
  48                    dlfcn.h dnl
  49                    linux/elf.h sys/procfs.h proc_service.h dnl
  50                    poll.h sys/poll.h sys/select.h)
  51
  52   AC_FUNC_MMAP
  53   AC_FUNC_VFORK
  54   AC_CHECK_FUNCS([fdwalk getrlimit pipe pipe2 poll socketpair sigaction \
  55                   ptrace64 sbrk setns sigaltstack sigprocmask \
  56                   setpgid setpgrp getrusage getauxval])
  57
  58   dnl Check if we can disable the virtual address space randomization.
  59   dnl The functionality of setarch -R.
  60   AC_CHECK_DECLS([ADDR_NO_RANDOMIZE],,, [#include <sys/personality.h>])
  61   define([PERSONALITY_TEST], [AC_LANG_PROGRAM([#include <sys/personality.h>], [
  62   #      if !HAVE_DECL_ADDR_NO_RANDOMIZE
  63   #       define ADDR_NO_RANDOMIZE 0x0040000
  64   #      endif
  65          /* Test the flag could be set and stays set.  */
  66          personality (personality (0xffffffff) | ADDR_NO_RANDOMIZE);
  67          if (!(personality (personality (0xffffffff)) & ADDR_NO_RANDOMIZE))
  68              return 1])])
  69   AC_RUN_IFELSE([PERSONALITY_TEST],
  70                 [have_personality=true],
  71                 [have_personality=false],
  72                 [AC_LINK_IFELSE([PERSONALITY_TEST],
  73                                 [have_personality=true],
  74                                 [have_personality=false])])
  75   if $have_personality
  76   then
  77       AC_DEFINE([HAVE_PERSONALITY], 1,
  78                 [Define if you support the personality syscall.])
  79   fi
  80
  81   AC_CHECK_DECLS([strstr])
  82
  83   # ----------------------- #
  84   # Checks for structures.  #
  85   # ----------------------- #
  86
  87   AC_CHECK_MEMBERS([struct stat.st_blocks, struct stat.st_blksize])
  88
  89   AC_SEARCH_LIBS(kinfo_getfile, util util-freebsd,
  90     [AC_DEFINE(HAVE_KINFO_GETFILE, 1,
  91               [Define to 1 if your system has the kinfo_getfile function. ])])
  92
  93   # Check for std::thread.  This does not work on some platforms, like
  94   # mingw and DJGPP.
  95   AC_LANG_PUSH([C++])
  96   AX_PTHREAD([threads=yes], [threads=no])
  97   if test "$threads" = "yes"; then
  98     save_LIBS="$LIBS"
  99     LIBS="$PTHREAD_LIBS $LIBS"
 100     save_CXXFLAGS="$CXXFLAGS"
 101     CXXFLAGS="$PTHREAD_CFLAGS $save_CXXFLAGS"
 102     AC_CACHE_CHECK([for std::thread],
 103                    gdb_cv_cxx_std_thread,
 104                    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 105     [[#include <thread>
 106       void callback() { }]],
 107     [[std::thread t(callback);]])],
 108                                   gdb_cv_cxx_std_thread=yes,
 109                                   gdb_cv_cxx_std_thread=no)])
 110
 111     # This check must be here, while LIBS includes any necessary
 112     # threading library.
 113     AC_CHECK_FUNCS([pthread_sigmask pthread_setname_np])
 114
 115     LIBS="$save_LIBS"
 116     CXXFLAGS="$save_CXXFLAGS"
 117   fi
 118   if test "$gdb_cv_cxx_std_thread" = "yes"; then
 119     AC_DEFINE(CXX_STD_THREAD, 1,
 120               [Define to 1 if std::thread works.])
 121   fi
 122   AC_LANG_POP
 123
 124   dnl Check if sigsetjmp is available.  Using AC_CHECK_FUNCS won't
 125   dnl do since sigsetjmp might only be defined as a macro.
 126   AC_CACHE_CHECK([for sigsetjmp], gdb_cv_func_sigsetjmp,
 127   [AC_TRY_COMPILE([
 128   #include <setjmp.h>
 129   ], [sigjmp_buf env; while (! sigsetjmp (env, 1)) siglongjmp (env, 1);],
 130   gdb_cv_func_sigsetjmp=yes, gdb_cv_func_sigsetjmp=no)])
 131   if test "$gdb_cv_func_sigsetjmp" = "yes"; then
 132     AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available. ])
 133   fi
 134
 135   AC_ARG_WITH(intel_pt,
 136     AS_HELP_STRING([--with-intel-pt], [include Intel Processor Trace support (auto/yes/no)]),
 137     [], [with_intel_pt=auto])
 138   AC_MSG_CHECKING([whether to use intel pt])
 139   AC_MSG_RESULT([$with_intel_pt])
 140
 141   if test "${with_intel_pt}" = no; then
 142     AC_MSG_WARN([Intel Processor Trace support disabled; some features may be unavailable.])
 143     HAVE_LIBIPT=no
 144   else
 145     AC_PREPROC_IFELSE([AC_LANG_SOURCE([[
 146   #include <linux/perf_event.h>
 147   #ifndef PERF_ATTR_SIZE_VER5
 148   # error
 149   #endif
 150     ]])], [perf_event=yes], [perf_event=no])
 151     if test "$perf_event" != yes; then
 152       if test "$with_intel_pt" = yes; then
 153         AC_MSG_ERROR([linux/perf_event.h missing or too old])
 154       else
 155         AC_MSG_WARN([linux/perf_event.h missing or too old; some features may be unavailable.])
 156       fi
 157     fi
 158
 159     AC_LIB_HAVE_LINKFLAGS([ipt], [], [#include "intel-pt.h"], [pt_insn_alloc_decoder (0);])
 160     if test "$HAVE_LIBIPT" != yes; then
 161       if test "$with_intel_pt" = yes; then
 162         AC_MSG_ERROR([libipt is missing or unusable])
 163       else
 164         AC_MSG_WARN([libipt is missing or unusable; some features may be unavailable.])
 165       fi
 166     else
 167       save_LIBS=$LIBS
 168       LIBS="$LIBS $LIBIPT"
 169       AC_CHECK_FUNCS(pt_insn_event)
 170       AC_CHECK_MEMBERS([struct pt_insn.enabled, struct pt_insn.resynced], [], [],
 171                        [#include <intel-pt.h>])
 172       LIBS=$save_LIBS
 173     fi
 174   fi
 175
 176   if test "$ac_cv_header_sys_procfs_h" = yes; then
 177     BFD_HAVE_SYS_PROCFS_TYPE(gregset_t)
 178     BFD_HAVE_SYS_PROCFS_TYPE(fpregset_t)
 179     BFD_HAVE_SYS_PROCFS_TYPE(prgregset_t)
 180     BFD_HAVE_SYS_PROCFS_TYPE(prfpregset_t)
 181     BFD_HAVE_SYS_PROCFS_TYPE(prgregset32_t)
 182     BFD_HAVE_SYS_PROCFS_TYPE(lwpid_t)
 183     BFD_HAVE_SYS_PROCFS_TYPE(psaddr_t)
 184     BFD_HAVE_SYS_PROCFS_TYPE(elf_fpregset_t)
 185   fi
 186 ])