gdb/
[deliverable/binutils-gdb.git] / gdb / configure.ac
index 447663712edc5112069c4afecd5ff490adeb0887..97cd6eeeb7c8b3182617fcd7a37e928e51756a1f 100644 (file)
@@ -1,7 +1,5 @@
 dnl Autoconf configure script for GDB, the GNU debugger.
-dnl Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
-dnl 2005, 2006, 2007, 2008, 2009
-dnl Free Software Foundation, Inc.
+dnl Copyright (C) 1995-2012 Free Software Foundation, Inc.
 dnl
 dnl This file is part of GDB.
 dnl 
@@ -27,12 +25,12 @@ AM_MAINTAINER_MODE
 
 AC_PROG_CC
 AC_USE_SYSTEM_EXTENSIONS
-gl_EARLY
 ACX_LARGEFILE
 AM_PROG_CC_STDC
 
 AC_CONFIG_AUX_DIR(..)
 AC_CANONICAL_SYSTEM
+AC_ARG_PROGRAM
 
 # Dependency checking.
 ZW_CREATE_DEPDIR
@@ -49,6 +47,12 @@ esac
 AM_CONDITIONAL(GMAKE, test "$MAKE_IS_GNU" = yes)
 AC_PROG_MAKE_SET
 
+# Configure gnulib.  We need to build gnulib under some other
+# directory not "gnulib", to avoid the problem of both GDB and
+# GDBserver wanting to build it in the same directory, when building
+# in the source dir.
+ACX_CONFIGURE_DIR(["gnulib"], ["build-gnulib"])
+
 dnl List of object files and targets accumulated by configure.
 
 CONFIG_OBS=
@@ -74,12 +78,12 @@ if test x"$USE_NLS" = xyes; then
    CONFIG_UNINSTALL="$CONFIG_UNINSTALL uninstall-po"
 fi
 
-gl_INIT
+GNULIB=build-gnulib/import
 
 # For Makefile dependencies.
 GNULIB_STDINT_H=
 if test x"$STDINT_H" != x; then
-  GNULIB_STDINT_H=gnulib/$STDINT_H
+  GNULIB_STDINT_H=$GNULIB/$STDINT_H
 fi
 AC_SUBST(GNULIB_STDINT_H)
 
@@ -87,14 +91,38 @@ PACKAGE=gdb
 AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of this package. ])
 AC_SUBST(PACKAGE)
 
-# GDB does not use automake, but gnulib does.  This line lets us
-# generate its Makefile.in.
-AM_INIT_AUTOMAKE(gdb, UNUSED-VERSION, [no-define])
+# We never need to detect it in this sub-configure.
+# But preserve it for config.status --recheck.
+AC_ARG_VAR(MAKEINFO,
+  [Parent configure detects if it is of sufficient version.])
+AC_ARG_VAR(MAKEINFOFLAGS,
+  [Parameters for MAKEINFO.])
+
+MAKEINFO_EXTRA_FLAGS=""
+AC_CACHE_CHECK([whether $MAKEINFO supports @click], gdb_cv_have_makeinfo_click,
+  [echo '@clicksequence{a @click{} b}' >conftest.texinfo
+  if eval "$MAKEINFO conftest.texinfo >&5 2>&5"; then
+    gdb_cv_have_makeinfo_click=yes
+  else
+    gdb_cv_have_makeinfo_click=no
+  fi])
+if test x"$gdb_cv_have_makeinfo_click" = xyes; then
+  MAKEINFO_EXTRA_FLAGS="$MAKEINFO_EXTRA_FLAGS -DHAVE_MAKEINFO_CLICK"
+fi
+AC_SUBST(MAKEINFO_EXTRA_FLAGS)
 
 GDB_AC_WITH_DIR(DEBUGDIR, separate-debug-dir,
     [look for global separate debug info in this path @<:@LIBDIR/debug@:>@],
     [${libdir}/debug])
 
+# We can't pass paths as command line arguments.
+# Mingw32 tries to be clever and will convert the paths for us.
+# For example -DBINDIR="/usr/local/bin" passed on the command line may get
+# converted to -DBINDIR="E:/msys/mingw32/msys/1.0/local/bin".
+# This breaks GDB's relocatable path conversions since paths passed in
+# config.h would not get so translated, the path prefixes no longer match.
+AC_DEFINE_DIR(BINDIR, bindir, [Directory of programs.])
+
 # GDB's datadir relocation
 
 GDB_AC_WITH_DIR(GDB_DATADIR, gdb-datadir,
@@ -108,7 +136,32 @@ AS_HELP_STRING([--with-relocated-sources=PATH], [automatically relocate this pat
               [Relocated directory for source files. ])
 ])
 
-AC_CONFIG_SUBDIRS(doc testsuite)
+AC_MSG_CHECKING([for default auto-load directory])
+AC_ARG_WITH(auto-load-dir,
+AS_HELP_STRING([--with-auto-load-dir=PATH],
+  [directories from which to load auto-loaded scripts, use '$ddir' for -data-directory @<:@$ddir/auto-load@:>@]),,
+  [with_auto_load_dir='$ddir/auto-load'])
+escape_dir=`echo $with_auto_load_dir | sed 's/[[$]]ddir\>/\\\\\\\\\\\\&/g'`
+AC_DEFINE_DIR(AUTO_LOAD_DIR, escape_dir,
+             [Directories from which to load auto-loaded scripts.])
+AC_MSG_RESULT([$with_auto_load_dir])
+
+AC_MSG_CHECKING([for default auto-load safe-path])
+AC_ARG_WITH(auto-load-safe-path,
+AS_HELP_STRING([--with-auto-load-safe-path=PATH],
+  [directories safe to hold auto-loaded files, use $ddir for --with-gdb-datadir path @<:@--with-auto-load-dir@:>@])
+AS_HELP_STRING([--without-auto-load-safe-path],
+               [do not restrict auto-loaded files locations]),
+    [if test "$with_auto_load_safe_path" = "no"; then
+     with_auto_load_safe_path="/"
+     fi],
+[with_auto_load_safe_path="$with_auto_load_dir"])
+escape_dir=`echo $with_auto_load_safe_path | sed 's/[[$]]ddir\>/\\\\\\\\\\\\&/g'`
+AC_DEFINE_DIR(AUTO_LOAD_SAFE_PATH, escape_dir,
+             [Directories safe to hold auto-loaded files.])
+AC_MSG_RESULT([$with_auto_load_safe_path])
+
+AC_CONFIG_SUBDIRS(testsuite)
 
 # Check whether to support alternative target configurations
 AC_ARG_ENABLE(targets,
@@ -161,6 +214,9 @@ do
 
     . ${srcdir}/configure.tgt
 
+    AS_IF([test -z "${gdb_target_obs}"],
+      [AC_MSG_ERROR([configuration ${targ} is unsupported.])])
+
     # Target-specific object files
     for i in ${gdb_target_obs}; do
         case " $TARGET_OBS " in
@@ -299,26 +355,44 @@ case $host_os in
     enable_gdbtk=no ;;
 esac
 
-# Libunwind support.
-AC_ARG_WITH(libunwind,
-AS_HELP_STRING([--with-libunwind], [use libunwind frame unwinding support]),
-[case "${withval}" in
-  yes)  enable_libunwind=yes ;;
-  no)   enable_libunwind=no ;;
-  *)    AC_MSG_ERROR(bad value ${withval} for GDB with-libunwind option) ;;
-esac],[
-  AC_CHECK_HEADERS(libunwind.h libunwind-ia64.h)
-  if test x"$ac_cv_header_libunwind_h" = xyes -a x"$ac_cv_header_libunwind_ia64_h" = xyes; then
-    enable_libunwind=yes;
+# Libunwind support for ia64.
+
+AC_ARG_WITH(libunwind-ia64,
+AS_HELP_STRING([--with-libunwind-ia64],
+              [use libunwind frame unwinding for ia64 targets]),,
+           [with_libunwind_ia64=auto])
+
+# Backward compatibility option.
+if test "${with_libunwind+set}" = set; then
+  if test x"$with_libunwind_ia64" != xauto; then
+    AC_MSG_ERROR(
+      [option --with-libunwind is deprecated, use --with-libunwind-ia64])
   fi
-])
-   
-if test x"$enable_libunwind" = xyes; then
-  AC_CHECK_HEADERS(libunwind.h libunwind-ia64.h)
-  AC_DEFINE(HAVE_LIBUNWIND, 1, [Define if libunwind library is being used.])
-  CONFIG_OBS="$CONFIG_OBS libunwind-frame.o"
-  CONFIG_DEPS="$CONFIG_DEPS libunwind-frame.o"
-  CONFIG_SRCS="$CONFIG_SRCS libunwind-frame.c"
+  AC_MSG_WARN([option --with-libunwind is deprecated, use --with-libunwind-ia64])
+  with_libunwind_ia64="$with_libunwind"
+fi
+
+case "$with_libunwind_ia64" in
+  yes | no)
+    ;;
+  auto)
+    AC_CHECK_HEADERS(libunwind-ia64.h)
+    with_libunwind_ia64=$ac_cv_header_libunwind_ia64_h
+    ;;
+  *)
+    AC_MSG_ERROR(
+      [bad value $with_libunwind_ia64 for GDB --with-libunwind-ia64 option])
+    ;;
+esac
+
+if test x"$with_libunwind_ia64" = xyes; then
+  AC_CHECK_HEADERS(libunwind-ia64.h)
+  if test x"$ac_cv_header_libunwind_ia64_h" != xyes; then
+    AC_MSG_ERROR([GDB option --with-libunwind-ia64 requires libunwind-ia64.h])
+  fi
+  CONFIG_OBS="$CONFIG_OBS ia64-libunwind-tdep.o"
+  CONFIG_DEPS="$CONFIG_DEPS ia64-libunwind-tdep.o"
+  CONFIG_SRCS="$CONFIG_SRCS ia64-libunwind-tdep.c"
 fi
 
 opt_curses=no
@@ -423,13 +497,36 @@ AC_SEARCH_LIBS(gethostbyname, nsl)
 AC_SEARCH_LIBS(socketpair, socket)
 
 # Link in zlib if we can.  This allows us to read compressed debug sections.
-AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
+AM_ZLIB
 
 # On HP/UX we may need libxpdl for dlgetmodinfo (used by solib-pa64.c).
 AC_SEARCH_LIBS(dlgetmodinfo, [dl xpdl])
 
 AM_ICONV
 
+# GDB may fork/exec the iconv program to get the list of supported character
+# sets.  Allow the user to specify where to find it.
+# There are several factors affecting the choice of option name:
+# - There is already --with-libiconv-prefix but we can't use it, it specifies
+#   the build-time location of libiconv files.
+# - The program we need to find is iconv, which comes with glibc.  The user
+#   doesn't necessarily have libiconv installed.  Therefore naming this
+#   --with-libiconv-foo feels wrong.
+# - We want the path to be relocatable, but GDB_AC_DEFINE_RELOCATABLE is
+#   defined to work on directories not files (though it really doesn't know
+#   the difference).
+# - Calling this --with-iconv-prefix is perceived to cause too much confusion
+#   with --with-libiconv-prefix.
+# Putting these together is why the option name is --with-iconv-bin.
+
+AC_ARG_WITH(iconv-bin,
+AS_HELP_STRING([--with-iconv-bin=PATH], [specify where to find the iconv program]),
+[iconv_bin="${withval}"
+ AC_DEFINE_UNQUOTED([ICONV_BIN], ["${iconv_bin}"],
+                    [Path of directory of iconv program.])
+ GDB_AC_DEFINE_RELOCATABLE(ICONV_BIN, iconv, ${iconv_bin})
+])
+
 # On alpha-osf, it appears that libtermcap and libcurses are not compatible.
 # There is a very specific comment in /usr/include/curses.h explaining that
 # termcap routines built into libcurses must not be used.
@@ -447,11 +544,11 @@ AM_ICONV
 # broken on alpha-osf.
 
 case $host_os in
-  alpha*-*-osf* )
-    if "$enable_tui" = "yes"; then
+  osf* )
+    if test x"$enable_tui" = xyes; then
       AC_MSG_ERROR([Building GDB with TUI mode is not supported on this host])
     fi
-    if "$enable_tui" = "auto"; then
+    if test x"$enable_tui" = xauto; then
       enable_tui=no
     fi
     ;;
@@ -487,10 +584,6 @@ if test x"$enable_tui" != xno; then
       CONFIG_DEPS="$CONFIG_DEPS \$(SUBDIR_TUI_DEPS)"
       CONFIG_SRCS="$CONFIG_SRCS \$(SUBDIR_TUI_SRCS)"
       ENABLE_CFLAGS="$ENABLE_CFLAGS \$(SUBDIR_TUI_CFLAGS)"
-      CONFIG_ALL="${CONFIG_ALL} all-tui"
-      CONFIG_CLEAN="${CONFIG_CLEAN} clean-tui"
-      CONFIG_INSTALL="${CONFIG_INSTALL} install-tui"
-      CONFIG_UNINSTALL="${CONFIG_UNINSTALL} uninstall-tui"
     else
       if test x"$enable_tui" = xyes; then
        AC_MSG_ERROR([no enhanced curses library found; disable TUI])
@@ -535,29 +628,45 @@ if test "$with_system_readline" = yes; then
   READLINE=-lreadline
   READLINE_DEPS=
   READLINE_CFLAGS=
-
-  # readline-6.0 started to use the name `_rl_echoing_p'.
-  # `$(READLINE_DIR)/' of bundled readline would not resolve in configure.
-
-  AC_MSG_CHECKING([for readline_echoing_p])
-  save_LIBS=$LIBS
-  LIBS="$LIBS $READLINE"
-  AC_LINK_IFELSE(AC_LANG_PROGRAM(,[[extern int readline_echoing_p;
-                                   return readline_echoing_p;]]),
-                [READLINE_ECHOING_P=yes],
-                [READLINE_ECHOING_P=no
-                 AC_DEFINE([readline_echoing_p], [_rl_echoing_p],
-                           [readline-6.0 started to use different name.])])
-  LIBS="$save_LIBS"
-  AC_MSG_RESULT([$READLINE_ECHOING_P])
+  READLINE_TEXI_INCFLAG=
 else
   READLINE='$(READLINE_DIR)/libreadline.a'
   READLINE_DEPS='$(READLINE)'
   READLINE_CFLAGS='-I$(READLINE_SRC)/..'
+  READLINE_TEXI_INCFLAG='-I $(READLINE_DIR)'
 fi
 AC_SUBST(READLINE)
 AC_SUBST(READLINE_DEPS)
 AC_SUBST(READLINE_CFLAGS)
+AC_SUBST(READLINE_TEXI_INCFLAG)
+
+# Generate jit-reader.h
+
+# This is typedeffed to GDB_CORE_ADDR in jit-reader.h
+TARGET_PTR=
+
+AC_CHECK_SIZEOF(unsigned long long)
+AC_CHECK_SIZEOF(unsigned long)
+AC_CHECK_SIZEOF(unsigned __int128)
+
+if test "x${ac_cv_sizeof_unsigned_long}" = "x8"; then
+  TARGET_PTR="unsigned long"
+elif test "x${ac_cv_sizeof_unsigned_long_long}" = "x8"; then
+  TARGET_PTR="unsigned long long"
+elif test "x${ac_cv_sizeof_unsigned___int128}" = "x16"; then
+  TARGET_PTR="unsigned __int128"
+else
+  TARGET_PTR="unsigned long"
+fi
+
+AC_SUBST(TARGET_PTR)
+AC_CONFIG_FILES([jit-reader.h:jit-reader.in])
+
+AC_SEARCH_LIBS(dlopen, dl)
+
+GDB_AC_WITH_DIR([JIT_READER_DIR], [jit-reader-dir],
+                [directory to load the JIT readers from],
+                [${libdir}/gdb])
 
 AC_ARG_WITH(expat,
   AS_HELP_STRING([--with-expat], [include expat support (auto/yes/no)]),
@@ -586,26 +695,69 @@ else
 fi
 
 dnl Utility to simplify finding libpython.
+dnl $1 = pythonX.Y
+dnl $2 = the shell variable to assign the result to
+dnl      If libpython is found we store $version here.
+dnl $3 = additional flags to add to CPPFLAGS
+dnl $4 = additional flags to add to LIBS
+
 AC_DEFUN([AC_TRY_LIBPYTHON],
 [
   version=$1
   define([have_libpython_var],$2)
-  define([VERSION],[translit([$1],[abcdefghijklmnopqrstuvwxyz./-],
-                                  [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
-  [HAVE_LIB]VERSION=no
+  new_CPPFLAGS=$3
+  new_LIBS=$4
   AC_MSG_CHECKING([for ${version}])
+  save_CPPFLAGS=$CPPFLAGS
   save_LIBS=$LIBS
-  LIBS="$LIBS -l${version}"
-  AC_LINK_IFELSE(AC_LANG_PROGRAM([[#include "${version}/Python.h"]],
+  CPPFLAGS="$CPPFLAGS $new_CPPFLAGS"
+  LIBS="$LIBS $new_LIBS"
+  found_usable_python=no
+  AC_LINK_IFELSE(AC_LANG_PROGRAM([[#include "Python.h"]],
                                  [[Py_Initialize ();]]),
-                 [[HAVE_LIB]VERSION=yes
-                  have_libpython_var=yes],
-                 [LIBS=$save_LIBS])
-  AC_MSG_RESULT([$[HAVE_LIB]VERSION])
+                 [have_libpython_var=${version}
+                  found_usable_python=yes
+                  PYTHON_CPPFLAGS=$new_CPPFLAGS
+                  PYTHON_LIBS=$new_LIBS])
+  CPPFLAGS=$save_CPPFLAGS
+  LIBS=$save_LIBS
+  AC_MSG_RESULT([${found_usable_python}])
 ])
 
+dnl There are several different values for --with-python:
+dnl
+dnl no -   Don't include python support.
+dnl yes -  Include python support, error if it's missing.
+dnl        If we find python in $PATH, use it to fetch configure options,
+dnl        otherwise assume the compiler can find it with no help from us.
+dnl        Python 2.7, 2.6, 2.5, and then 2.4 are tried in turn.
+dnl auto - Same as "yes", but if python is missing from the system,
+dnl        fall back to "no".
+dnl /path/to/python/exec-prefix -
+dnl        Use the python located in this directory.
+dnl        If /path/to/python/exec-prefix/bin/python exists, use it to find
+dnl        the compilation parameters.  Otherwise use
+dnl        -I/path/to/python/exec-prefix/include,
+dnl        -L/path/to/python/exec-prefix/lib.
+dnl        Python 2.7, 2.6, 2.5, and then 2.4 are tried in turn.
+dnl        NOTE: This case is historical.  It is what was done for 7.0/7.1
+dnl        but is deprecated.
+dnl /path/to/python/executable -
+dnl        Run python-config.py with this version of python to fetch the
+dnl        compilation parameters.
+dnl        NOTE: This needn't be the real python executable.
+dnl        In a cross-compilation scenario (build != host), this could be
+dnl        a shell script that provides what python-config.py provides for
+dnl        --ldflags, --includes, --exec-prefix.
+dnl python-executable -
+dnl        Find python-executable in $PATH, and then handle the same as
+dnl        /path/to/python/executable.
+dnl
+dnl If a python program is specified, it is used to run python-config.py and
+dnl is passed --ldflags, --includes, --exec-prefix.
+
 AC_ARG_WITH(python,
-  AS_HELP_STRING([--with-python], [include python support (auto/yes/no/<path>)]),
+  AS_HELP_STRING([--with-python@<:@=PYTHON@:>@], [include python support (auto/yes/no/<python-program>)]),
   [], [with_python=auto])
 AC_MSG_CHECKING([whether to use python])
 AC_MSG_RESULT([$with_python])
@@ -615,44 +767,166 @@ if test "${with_python}" = no; then
   have_libpython=no
 else
   case "${with_python}" in
-  yes | auto)
-    # Leave as empty, use defaults.
-    python_includes=
-    python_libs=
-    ;;
-  /*)
-    python_includes="-I${with_python}/include"
-    python_libs="-L${with_python}/lib"
+  [[\\/]]* | ?:[[\\/]]*)
+    if test -d ${with_python}; then
+      # Assume the python binary is ${with_python}/bin/python.
+      python_prog="${with_python}/bin/python"
+      python_prefix=
+      # If python does not exit ${with_python}/bin, then try in
+      # ${with_python}.  On Windows/MinGW, this is where the Python
+      # executable is.
+      if test ! -x "${python_prog}"; then
+        python_prog="${with_python}/python"
+        python_prefix=
+      fi
+      if test ! -x "${python_prog}"; then
+        # Fall back to gdb 7.0/7.1 behaviour.
+        python_prog=missing
+        python_prefix=${with_python}
+      fi
+    elif test -x "${with_python}"; then
+      # While we can't run python compiled for $host (unless host == build),
+      # the user could write a script that provides the needed information,
+      # so we support that.
+      python_prog=${with_python}
+      python_prefix=
+    else
+      AC_ERROR(invalid value for --with-python)
+    fi
     ;;
-  *)
+  */*)
+    # Disallow --with-python=foo/bar.
     AC_ERROR(invalid value for --with-python)
     ;;
+  *)
+    # The user has either specified auto, yes, or the name of the python
+    # program assumed to be in $PATH.
+    python_prefix=
+    case "${with_python}" in
+    yes | auto)
+      if test ${build} = ${host}; then
+        AC_PATH_PROG(python_prog_path, python, missing)
+        if test "${python_prog_path}" = missing; then
+          python_prog=missing
+        else
+          python_prog=${python_prog_path}
+        fi
+      else
+        # Not much we can do except assume the cross-compiler will find the
+        # right files.
+        python_prog=missing
+      fi
+      ;;
+    *)
+      # While we can't run python compiled for $host (unless host == build),
+      # the user could write a script that provides the needed information,
+      # so we support that.
+      python_prog="${with_python}"
+      AC_PATH_PROG(python_prog_path, ${python_prog}, missing)
+      if test "${python_prog_path}" = missing; then
+        AC_ERROR(unable to find python program ${python_prog})
+      fi
+      ;;
+    esac
   esac
 
-  save_CPPFLAGS=$CPPFLAGS
-  CPPFLAGS="$CPPFLAGS ${python_includes}"
-  save_LIBS=$LIBS
-  LIBS="$LIBS ${python_libs}"
-  have_libpython=no
-  if test "${have_libpython}" = no; then
-    AC_TRY_LIBPYTHON(python2.6, have_libpython)
-    if test "${HAVE_LIBPYTHON2_6}" = yes; then
-      AC_DEFINE(HAVE_LIBPYTHON2_6, 1, [Define if Python 2.6 is being used.])
+  if test "${python_prog}" != missing; then
+    # We have a python program to use, but it may be too old.
+    # Don't flag an error for --with-python=auto (the default).
+    have_python_config=yes
+    python_includes=`${python_prog} ${srcdir}/python/python-config.py --includes`
+    if test $? != 0; then
+      have_python_config=failed
+      if test "${with_python}" != auto; then
+        AC_ERROR(failure running python-config --includes)
+      fi
     fi
-  fi
-  if test ${have_libpython} = no; then
-    AC_TRY_LIBPYTHON(python2.5, have_libpython)
-    if test "${HAVE_LIBPYTHON2_5}" = yes; then
-      AC_DEFINE(HAVE_LIBPYTHON2_5, 1, [Define if Python 2.5 is being used.])
+    python_libs=`${python_prog} ${srcdir}/python/python-config.py --ldflags`
+    if test $? != 0; then
+      have_python_config=failed
+      if test "${with_python}" != auto; then
+        AC_ERROR(failure running python-config --ldflags)
+      fi
+    fi
+    python_prefix=`${python_prog} ${srcdir}/python/python-config.py --exec-prefix`
+    if test $? != 0; then
+      have_python_config=failed
+      if test "${with_python}" != auto; then
+        AC_ERROR(failure running python-config --exec-prefix)
+      fi
     fi
+  else
+    # We do not have a python executable we can use to determine where
+    # to find the Python headers and libs.  We cannot guess the include
+    # path from the python_prefix either, because that include path
+    # depends on the Python version.  So, there is nothing much we can
+    # do except assume that the compiler will be able to find those files.
+    python_includes=
+    python_libs=
+    have_python_config=no
   fi
-  if test ${have_libpython} = no; then
-    AC_TRY_LIBPYTHON(python2.4, have_libpython)
-    if test "${HAVE_LIBPYTHON2_4}" = yes; then
-      AC_DEFINE(HAVE_LIBPYTHON2_4, 1, [Define if Python 2.4 is being used.])
+
+  # If we have python-config, only try the configuration it provides.
+  # Otherwise fallback on the old way of trying different versions of
+  # python in turn.
+
+  have_libpython=no
+  if test "${have_python_config}" = yes; then
+    # Determine the Python version by extracting "-lpython<version>"
+    # part of the python_libs. <version> is usually X.Y with X and Y
+    # being decimal numbers, but can also be XY (seen on Windows).
+    #
+    # The extraction is performed using sed with a regular expression.
+    # Initially, the regexp used was using the '?' quantifier to make
+    # the dot in the version number optional.  Unfortunately, this
+    # does not work with non-GNU versions of sed because, because of
+    # what looks like a limitation (the '?' quantifier does not work
+    # with back-references).  We work around this limitation by using
+    # the '*' quantifier instead.  It means that, in theory, we might
+    # match unexpected version strings such as "-lpython2..7", but
+    # this seems unlikely in practice.  And even if that happens,
+    # an error will be triggered later on, when checking that version
+    # number.
+    python_version=`echo " ${python_libs} " \
+                         | sed -e 's,^.* -l\(python[[0-9]]*[[.]]*[[0-9]]*\).*$,\1,'`
+    case "${python_version}" in
+    python*)
+      AC_TRY_LIBPYTHON(${python_version}, have_libpython,
+                       ${python_includes}, ${python_libs})
+      ;;
+    *)
+      AC_MSG_ERROR([unable to determine python version from ${python_libs}])
+      ;;
+    esac
+  elif test "${have_python_config}" != failed; then
+    if test "${have_libpython}" = no; then
+      AC_TRY_LIBPYTHON(python2.7, have_libpython,
+                       ${python_includes}, "${python_libs} -lpython2.7")
+    fi
+    if test "${have_libpython}" = no; then
+      AC_TRY_LIBPYTHON(python2.6, have_libpython,
+                       ${python_includes}, "${python_libs} -lpython2.6")
+    fi
+    if test ${have_libpython} = no; then
+      AC_TRY_LIBPYTHON(python2.5, have_libpython,
+                       ${python_includes}, "${python_libs} -lpython2.5")
+    fi
+    if test ${have_libpython} = no; then
+      AC_TRY_LIBPYTHON(python2.4, have_libpython,
+                       ${python_includes}, "${python_libs} -lpython2.4")
     fi
   fi
-  if test ${have_libpython} = no; then
+  if test "${have_libpython}" = python2.7 -o "${have_libpython}" = python27; then
+    AC_DEFINE(HAVE_LIBPYTHON2_7, 1, [Define if Python 2.7 is being used.])
+  elif test "${have_libpython}" = python2.6 -o "${have_libpython}" = python26; then
+    AC_DEFINE(HAVE_LIBPYTHON2_6, 1, [Define if Python 2.6 is being used.])
+  elif test "${have_libpython}" = python2.5 -o "${have_libpython}" = python25; then
+    AC_DEFINE(HAVE_LIBPYTHON2_5, 1, [Define if Python 2.5 is being used.])
+  elif test "${have_libpython}" = python2.4 -o "${have_libpython}" = python24; then
+    AC_DEFINE(HAVE_LIBPYTHON2_4, 1, [Define if Python 2.4 is being used.])
+  fi
+
+  if test "${have_libpython}" = no; then
     case "${with_python}" in
     yes)
       AC_MSG_ERROR([python is missing or unusable])
@@ -664,16 +938,21 @@ else
       AC_MSG_ERROR([no usable python found at ${with_python}])
       ;;
     esac
-    CPPFLAGS=$save_CPPFLAGS
-    LIBS=$save_LIBS
+  else
+    if test -n "${python_prefix}"; then
+      AC_DEFINE_UNQUOTED(WITH_PYTHON_PATH, "${python_prefix}",
+                         [Define if --with-python provides a path, either directly or via python-config.py --exec-prefix.])
+      GDB_AC_DEFINE_RELOCATABLE(PYTHON_PATH, python, ${python_prefix})
+    fi
   fi
 fi
 
-if test "${have_libpython}" = yes; then
+if test "${have_libpython}" != no; then
   AC_DEFINE(HAVE_PYTHON, 1, [Define if Python interpreter is being linked in.])
   CONFIG_OBS="$CONFIG_OBS \$(SUBDIR_PYTHON_OBS)"
   CONFIG_DEPS="$CONFIG_DEPS \$(SUBDIR_PYTHON_DEPS)"
   CONFIG_SRCS="$CONFIG_SRCS \$(SUBDIR_PYTHON_SRCS)"
+  CONFIG_INSTALL="$CONFIG_INSTALL install-python"
   ENABLE_CFLAGS="$ENABLE_CFLAGS \$(SUBDIR_PYTHON_CFLAGS)"
 
   # Flags needed to compile Python code (taken from python-config --cflags).
@@ -696,13 +975,31 @@ if test "${have_libpython}" = yes; then
     done
     AC_MSG_RESULT(${PYTHON_CFLAGS})
   fi
+
+  # On IRIX, type siginfo is not defined.  Instead, sys/siginfo.h provides:
+  #    #if _SGIAPI
+  #    #define siginfo __siginfo
+  #    #endif
+  # The problem is that including Python causes some XOPEN macros to be
+  # unilaterally defined, and that in turn causes _SGIAPI to evaluate
+  # to false.  So, we work around this issue by defining siginfo ourself
+  # though the command-line.
+  case "$gdb_host" in
+    irix*) if test "${GCC}" = yes; then
+             CPPFLAGS="$CPPFLAGS -Dsiginfo=__siginfo"
+           fi
+           ;;
+  esac
 else
   # Even if Python support is not compiled in, we need to have these files
-  # included in order to recognize the GDB command "python".
-  CONFIG_OBS="$CONFIG_OBS python.o py-value.o py-prettyprint.o"
-  CONFIG_SRCS="$CONFIG_SRCS python/python.c python/py-value.c python/py-prettyprint.c"
+  # included.
+  CONFIG_OBS="$CONFIG_OBS python.o py-value.o py-prettyprint.o py-auto-load.o"
+  CONFIG_SRCS="$CONFIG_SRCS python/python.c python/py-value.c \
+       python/py-prettyprint.c python/py-auto-load.c"
 fi
 AC_SUBST(PYTHON_CFLAGS)
+AC_SUBST(PYTHON_CPPFLAGS)
+AC_SUBST(PYTHON_LIBS)
 
 # ------------------------- #
 # Checks for header files.  #
@@ -721,7 +1018,8 @@ AC_CHECK_HEADERS([nlist.h machine/reg.h poll.h sys/poll.h proc_service.h \
                  sys/resource.h sys/procfs.h sys/ptrace.h ptrace.h \
                  sys/reg.h sys/debugreg.h sys/select.h sys/syscall.h \
                  sys/types.h sys/wait.h wait.h termios.h termio.h \
-                 sgtty.h unistd.h elf_hp.h ctype.h time.h locale.h])
+                 sgtty.h unistd.h elf_hp.h ctype.h time.h locale.h \
+                 dlfcn.h sys/socket.h sys/un.h])
 AC_CHECK_HEADERS(link.h, [], [],
 [#if HAVE_SYS_TYPES_H
 # include <sys/types.h>
@@ -798,10 +1096,12 @@ AC_C_BIGENDIAN
 AC_FUNC_ALLOCA
 AC_FUNC_MMAP
 AC_FUNC_VFORK
-AC_CHECK_FUNCS([canonicalize_file_name realpath getrusage getuid \
-               getgid pipe poll pread64 sbrk setpgid setpgrp setsid \
+AC_CHECK_FUNCS([canonicalize_file_name realpath getrusage getuid getgid \
+               pipe poll pread pread64 pwrite readlink resize_term \
+               sbrk setpgid setpgrp setsid \
                sigaction sigprocmask sigsetmask socketpair syscall \
-               ttrace wborder setlocale iconvlist libiconvlist btowc])
+               ttrace wborder wresize setlocale iconvlist libiconvlist btowc \
+               setrlimit getrlimit posix_madvise waitpid lstat])
 AM_LANGINFO_CODESET
 
 # Check the return and argument types of ptrace.  No canned test for
@@ -1299,6 +1599,47 @@ aix*)
   ;;
 esac
 
+AC_MSG_CHECKING(for the dynamic export flag)
+dynamic_list=false
+if test "${gdb_native}" = yes; then
+   # The dynamically loaded libthread_db needs access to symbols in the gdb
+   # executable.  Older GNU ld supports --export-dynamic but --dynamic-list
+   # may not be supported there.
+   old_LDFLAGS="$LDFLAGS"
+   # Older GNU ld supports --export-dynamic but --dynamic-list it does not.
+   RDYNAMIC="-Wl,--dynamic-list=${srcdir}/proc-service.list"
+   LDFLAGS="$LDFLAGS $RDYNAMIC"
+   if test "${have_libpython}" = no; then
+     AC_TRY_LINK([], [], [dynamic_list=true])
+   else
+     # Workaround http://bugs.python.org/issue4434 where static
+     # libpythonX.Y.a would get its symbols required for
+     # pythonX.Y/lib-dynload/*.so modules hidden by -Wl,--dynamic-list.
+     # Problem does not happen for the recommended libpythonX.Y.so linkage.
+     old_CFLAGS="$CFLAGS"
+     CFLAGS="$CFLAGS $PYTHON_CFLAGS"
+     AC_RUN_IFELSE(
+       AC_LANG_PROGRAM(
+         [#include "]${have_libpython}[/Python.h"],
+         [int err;
+          Py_Initialize ();
+          err = PyRun_SimpleString ("import itertools\n");
+          Py_Finalize ();
+          return err == 0 ? 0 : 1;]),
+       [dynamic_list=true], [], [true])
+     CFLAGS="$old_CFLAGS"
+   fi
+   LDFLAGS="$old_LDFLAGS"
+fi
+if $dynamic_list; then
+  found="-Wl,--dynamic-list"
+  RDYNAMIC='-Wl,--dynamic-list=$(srcdir)/proc-service.list'
+else
+  found="-rdynamic"
+  RDYNAMIC="-rdynamic"
+fi
+AC_SUBST(RDYNAMIC)
+AC_MSG_RESULT($found)
 
 dnl For certain native configurations, we need to check whether thread
 dnl support can be built in or not.
@@ -1308,22 +1649,6 @@ dnl and not doing a canadian cross build (build == host).
 
 if test ${build} = ${host} -a ${host} = ${target} ; then
    case ${host_os} in
-   hpux*)
-      AC_MSG_CHECKING(for HPUX/OSF thread support)
-      if test -f /usr/include/dce/cma_config.h ; then
-         if test "$GCC" = "yes" ; then
-            AC_MSG_RESULT(yes)
-            AC_DEFINE(HAVE_HPUX_THREAD_SUPPORT, 1,
-           [Define if you have HPUX threads])
-            CONFIG_OBS="${CONFIG_OBS} hpux-thread.o"
-            CONFIG_SRCS="${CONFIG_SRCS} hpux-thread.c"
-         else
-            AC_MSG_RESULT(no (suppressed because you are not using GCC))
-         fi
-      else
-         AC_MSG_RESULT(no)
-      fi
-      ;;
    solaris*)
       # See if thread_db library is around for Solaris thread debugging.
       # Note that we must explicitly test for version 1 of the library
@@ -1337,19 +1662,7 @@ if test ${build} = ${host} -a ${host} = ${target} ; then
          CONFIG_OBS="${CONFIG_OBS} sol-thread.o"
          CONFIG_SRCS="${CONFIG_SRCS} sol-thread.c"
          AC_CHECK_LIB(dl, dlopen)
-         if test "$GCC" = "yes" ; then
-            # The GNU linker requires the -export-dynamic option to make
-            # all symbols visible in the dynamic symbol table.
-            hold_ldflags=$LDFLAGS
-            AC_MSG_CHECKING(for the ld -export-dynamic flag)
-            LDFLAGS="${LDFLAGS} -Wl,-export-dynamic"
-            AC_TRY_LINK(, [int i;], found=yes, found=no)
-            LDFLAGS=$hold_ldflags
-            AC_MSG_RESULT($found)
-            if test $found = yes; then
-               CONFIG_LDFLAGS="${CONFIG_LDFLAGS} -Wl,-export-dynamic"
-            fi
-         fi
+        CONFIG_LDFLAGS="${CONFIG_LDFLAGS} $RDYNAMIC"
         # Sun randomly tweaked the prototypes in <proc_service.h>
         # at one point.
         AC_MSG_CHECKING(if <proc_service.h> is old)
@@ -1384,7 +1697,12 @@ if test ${build} = ${host} -a ${host} = ${target} ; then
       if test $gdb_cv_have_aix_thread_debug = yes; then
          CONFIG_SRCS="${CONFIG_SRCS} aix-thread.c"
          CONFIG_OBS="${CONFIG_OBS} aix-thread.o"
-         CONFIG_LDFLAGS="${CONFIG_LDFLAGS} -lpthdebug"
+         LIBS="$LIBS -lpthdebug"
+
+         # Older versions of AIX do not provide the declaration for
+         # the getthrds function (it appears that it was introduced
+         # with AIX 6.x).
+         AC_CHECK_DECLS(getthrds, [], [], [[#include <procinfo.h>]])
       fi
       ;;
    esac
@@ -1477,42 +1795,20 @@ fi
 
 dnl Handle optional features that can be enabled.
 
-target_sysroot_reloc=0
+# Support for --with-sysroot is a copy of GDB_AC_WITH_DIR,
+# except that the argument to --with-sysroot is optional.
+# --with-sysroot (or --with-sysroot=yes) sets the default sysroot path.
+if test "x$with_sysroot" = xyes; then
+  with_sysroot="${exec_prefix}/${target_alias}/sys-root"
+fi
 AC_ARG_WITH(sysroot,
-AS_HELP_STRING([--with-sysroot@<:@=DIR@:>@], [search for usr/lib et al within DIR]),
-[
- case ${with_sysroot} in
- yes) TARGET_SYSTEM_ROOT='${exec_prefix}/${target_alias}/sys-root' ;;
- *) TARGET_SYSTEM_ROOT=$with_sysroot ;;
- esac
-
- TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"$(TARGET_SYSTEM_ROOT)\"'
-
- if test "x$prefix" = xNONE; then
-  test_prefix=/usr/local
- else
-  test_prefix=$prefix
- fi
- if test "x$exec_prefix" = xNONE || test "x$exec_prefix" = 'x${prefix}'; then
-  test_exec_prefix=$test_prefix
- else
-  test_exec_prefix=$exec_prefix
- fi
- case ${TARGET_SYSTEM_ROOT} in
- "${test_prefix}"|"${test_prefix}/"*|\
- "${test_exec_prefix}"|"${test_exec_prefix}/"*|\
- '${prefix}'|'${prefix}/'*|\
- '${exec_prefix}'|'${exec_prefix}/'*)
-   target_sysroot_reloc=1
-   ;;
- esac
-], [
- TARGET_SYSTEM_ROOT=
- TARGET_SYSTEM_ROOT_DEFINE='-DTARGET_SYSTEM_ROOT=\"\"'
-])
-TARGET_SYSTEM_ROOT_DEFINE="$TARGET_SYSTEM_ROOT_DEFINE -DTARGET_SYSTEM_ROOT_RELOCATABLE=$target_sysroot_reloc"
+  AS_HELP_STRING([--with-sysroot@<:@=DIR@:>@],
+                 [search for usr/lib et al within DIR]),
+  [TARGET_SYSTEM_ROOT=$withval], [TARGET_SYSTEM_ROOT=])
+AC_DEFINE_DIR(TARGET_SYSTEM_ROOT, TARGET_SYSTEM_ROOT,
+              [search for usr/lib et al within DIR])
 AC_SUBST(TARGET_SYSTEM_ROOT)
-AC_SUBST(TARGET_SYSTEM_ROOT_DEFINE)
+GDB_AC_DEFINE_RELOCATABLE(TARGET_SYSTEM_ROOT, sysroot, ${ac_define_dir})
 
 GDB_AC_WITH_DIR(SYSTEM_GDBINIT, system-gdbinit,
     [automatically load a system-wide gdbinit file],
@@ -1543,7 +1839,8 @@ fi
 # gdb/doc/gdbint.texinfo.
 build_warnings="-Wall -Wdeclaration-after-statement -Wpointer-arith \
 -Wformat-nonliteral -Wno-pointer-sign \
--Wno-unused -Wunused-value -Wno-switch -Wno-char-subscripts"
+-Wno-unused -Wunused-value -Wunused-function \
+-Wno-switch -Wno-char-subscripts -Wmissing-prototypes"
 
 # Enable -Wno-format by default when using gcc on mingw since many
 # GCC versions complain about %I64.
@@ -1644,9 +1941,16 @@ AC_SUBST(WIN32LIBS)
 OLD_CFLAGS=$CFLAGS
 OLD_LDFLAGS=$LDFLAGS
 OLD_LIBS=$LIBS
-CFLAGS="$CFLAGS -I${srcdir}/../include -I../bfd -I${srcdir}/../bfd"
-LDFLAGS="$LDFLAGS -L../bfd -L../libiberty"
+# Put the old CFLAGS/LDFLAGS last, in case the user's (C|LD)FLAGS
+# points somewhere with bfd, with -I/foo/lib and -L/foo/lib.  We
+# always want our bfd.
+CFLAGS="-I${srcdir}/../include -I../bfd -I${srcdir}/../bfd $CFLAGS"
+LDFLAGS="-L../bfd -L../libiberty $LDFLAGS"
 intl=`echo $LIBINTL | sed 's,${top_builddir}/,,g'`
+# -ldl is provided by bfd/Makfile.am (LIBDL) <PLUGINS>.
+if test "$plugins" = "yes"; then
+  LIBS="-ldl $LIBS"
+fi
 LIBS="-lbfd -liberty $intl $LIBS"
 AC_CACHE_CHECK([for ELF support in BFD], gdb_cv_var_elf,
 [AC_TRY_LINK(
@@ -1657,9 +1961,13 @@ AC_CACHE_CHECK([for ELF support in BFD], gdb_cv_var_elf,
 [bfd *abfd = NULL; bfd_get_elf_phdr_upper_bound (abfd); ],
 gdb_cv_var_elf=yes, gdb_cv_var_elf=no)])
 if test $gdb_cv_var_elf = yes; then
-  CONFIG_OBS="$CONFIG_OBS elfread.o"
+  CONFIG_OBS="$CONFIG_OBS elfread.o stap-probe.o"
   AC_DEFINE(HAVE_ELF, 1,
            [Define if ELF support should be included.])
+  # -ldl is provided by bfd/Makfile.am (LIBDL) <PLUGINS>.
+  if test "$plugins" = "yes"; then
+    OLD_LIBS="-ldl $OLD_LIBS"
+  fi
 fi
 CFLAGS=$OLD_CFLAGS
 LDFLAGS=$OLD_LDFLAGS
@@ -1894,17 +2202,33 @@ if test "x$enable_multi_ice" = xyes; then
    AC_CONFIG_SUBDIRS(multi-ice)
 fi
 
-# We only build gdbserver automatically in a native configuration. 
-if test "$gdb_native" = "yes"; then
+AC_ARG_ENABLE(gdbserver,
+AS_HELP_STRING([--enable-gdbserver],
+               [automatically build gdbserver (yes/no/auto, default is auto)]),
+[case "${enableval}" in
+  yes| no|auto) ;;
+  *) AC_MSG_ERROR(bad value ${enableval} for --enable-gdbserver option) ;;
+esac],[enable_gdbserver=auto])
+
+# We only build gdbserver automatically in a native configuration, and
+# only if the user did not explicitly disable its build.
+if test "$gdb_native" = "yes" -a "$enable_gdbserver" != "no"; then
   AC_MSG_CHECKING(whether gdbserver is supported on this host)
   if test "x$build_gdbserver" = xyes; then
     AC_MSG_RESULT(yes)
     AC_CONFIG_SUBDIRS(gdbserver)
+    gdbserver_build_enabled=yes
   else
     AC_MSG_RESULT(no)
   fi
 fi
 
+# If the user explicitly request the gdbserver to be built, verify that
+# we were in fact able to enable it.
+if test "$enable_gdbserver" = "yes" -a "$gdbserver_build_enabled" != "yes"; then
+  AC_MSG_ERROR(Automatic gdbserver build is not supported for this configuration)
+fi
+
 # If nativefile (NAT_FILE) is not set in config/*/*.m[ht] files, we link
 # to an empty version.
 
@@ -1933,7 +2257,7 @@ dnl  At the moment, we just assume it's UTF-8.
 AC_DEFINE(GDB_DEFAULT_HOST_CHARSET, "UTF-8",
           [Define to be a string naming the default host character set.])
 
-AC_OUTPUT(Makefile .gdbinit:gdbinit.in gnulib/Makefile,
+AC_OUTPUT(Makefile gdb-gdb.gdb doc/Makefile data-directory/Makefile,
 [
 case x$CONFIG_HEADERS in
 xconfig.h:config.in)
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