Merge GDB 7.5.1

gdb/gnulib/m4/gnulib-common.m4

-# gnulib-common.m4 serial 20
-dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-# gl_COMMON
-# is expanded unconditionally through gnulib-tool magic.
-AC_DEFUN([gl_COMMON], [
-  dnl Use AC_REQUIRE here, so that the code is expanded once only.
-  AC_REQUIRE([gl_00GNULIB])
-  AC_REQUIRE([gl_COMMON_BODY])
-])
-AC_DEFUN([gl_COMMON_BODY], [
-  AH_VERBATIM([isoc99_inline],
-[/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports
-   the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of
-   earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.
-   __APPLE__ && __MACH__ test for MacOS X.
-   __APPLE_CC__ tests for the Apple compiler and its version.
-   __STDC_VERSION__ tests for the C99 mode.  */
-#if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
-# define __GNUC_STDC_INLINE__ 1
-#endif])
-  AH_VERBATIM([unused_parameter],
-[/* Define as a marker that can be attached to declarations that might not
-    be used.  This helps to reduce warnings, such as from
-    GCC -Wunused-parameter.  */
-#if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
-# define _GL_UNUSED __attribute__ ((__unused__))
-#else
-# define _GL_UNUSED
-#endif
-/* The name _UNUSED_PARAMETER_ is an earlier spelling, although the name
-   is a misnomer outside of parameter lists.  */
-#define _UNUSED_PARAMETER_ _GL_UNUSED
-])
-  dnl Preparation for running test programs:
-  dnl Tell glibc to write diagnostics from -D_FORTIFY_SOURCE=2 to stderr, not
-  dnl to /dev/tty, so they can be redirected to log files.  Such diagnostics
-  dnl arise e.g., in the macros gl_PRINTF_DIRECTIVE_N, gl_SNPRINTF_DIRECTIVE_N.
-  LIBC_FATAL_STDERR_=1
-  export LIBC_FATAL_STDERR_
-])
-
-# gl_MODULE_INDICATOR_CONDITION
-# expands to a C preprocessor expression that evaluates to 1 or 0, depending
-# whether a gnulib module that has been requested shall be considered present
-# or not.
-AC_DEFUN([gl_MODULE_INDICATOR_CONDITION], [1])
-
-# gl_MODULE_INDICATOR_SET_VARIABLE([modulename])
-# sets the shell variable that indicates the presence of the given module to
-# a C preprocessor expression that will evaluate to 1.
-AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE],
-[
-  GNULIB_[]m4_translit([[$1]],
-    [abcdefghijklmnopqrstuvwxyz./-],
-    [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=gl_MODULE_INDICATOR_CONDITION
-])
-
-# gl_MODULE_INDICATOR([modulename])
-# defines a C macro indicating the presence of the given module
-# in a location where it can be used.
-#                                             |  Value  |   Value   |
-#                                             | in lib/ | in tests/ |
-# --------------------------------------------+---------+-----------+
-# Module present among main modules:          |    1    |     1     |
-# --------------------------------------------+---------+-----------+
-# Module present among tests-related modules: |    0    |     1     |
-# --------------------------------------------+---------+-----------+
-# Module not present at all:                  |    0    |     0     |
-# --------------------------------------------+---------+-----------+
-AC_DEFUN([gl_MODULE_INDICATOR],
-[
-  AC_DEFINE_UNQUOTED([GNULIB_]m4_translit([[$1]],
-      [abcdefghijklmnopqrstuvwxyz./-],
-      [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]),
-    [gl_MODULE_INDICATOR_CONDITION],
-    [Define to a C preprocessor expression that evaluates to 1 or 0,
-     depending whether the gnulib module $1 shall be considered present.])
-])
-
-# gl_MODULE_INDICATOR_FOR_TESTS([modulename])
-# defines a C macro indicating the presence of the given module
-# in lib or tests. This is useful to determine whether the module
-# should be tested.
-#                                             |  Value  |   Value   |
-#                                             | in lib/ | in tests/ |
-# --------------------------------------------+---------+-----------+
-# Module present among main modules:          |    1    |     1     |
-# --------------------------------------------+---------+-----------+
-# Module present among tests-related modules: |    1    |     1     |
-# --------------------------------------------+---------+-----------+
-# Module not present at all:                  |    0    |     0     |
-# --------------------------------------------+---------+-----------+
-AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS],
-[
-  AC_DEFINE([GNULIB_TEST_]m4_translit([[$1]],
-      [abcdefghijklmnopqrstuvwxyz./-],
-      [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1],
-    [Define to 1 when the gnulib module $1 should be tested.])
-])
-
-# m4_foreach_w
-# is a backport of autoconf-2.59c's m4_foreach_w.
-# Remove this macro when we can assume autoconf >= 2.60.
-m4_ifndef([m4_foreach_w],
-  [m4_define([m4_foreach_w],
-    [m4_foreach([$1], m4_split(m4_normalize([$2]), [ ]), [$3])])])
-
-# AS_VAR_IF(VAR, VALUE, [IF-MATCH], [IF-NOT-MATCH])
-# ----------------------------------------------------
-# Backport of autoconf-2.63b's macro.
-# Remove this macro when we can assume autoconf >= 2.64.
-m4_ifndef([AS_VAR_IF],
-[m4_define([AS_VAR_IF],
-[AS_IF([test x"AS_VAR_GET([$1])" = x""$2], [$3], [$4])])])
-
-# AC_PROG_MKDIR_P
-# is a backport of autoconf-2.60's AC_PROG_MKDIR_P, with a fix
-# for interoperability with automake-1.9.6 from autoconf-2.62.
-# Remove this macro when we can assume autoconf >= 2.62 or
-# autoconf >= 2.60 && automake >= 1.10.
-m4_ifdef([AC_PROG_MKDIR_P], [
-  dnl For automake-1.9.6 && autoconf < 2.62: Ensure MKDIR_P is AC_SUBSTed.
-  m4_define([AC_PROG_MKDIR_P],
-    m4_defn([AC_PROG_MKDIR_P])[
-    AC_SUBST([MKDIR_P])])], [
-  dnl For autoconf < 2.60: Backport of AC_PROG_MKDIR_P.
-  AC_DEFUN_ONCE([AC_PROG_MKDIR_P],
-    [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake
-     MKDIR_P='$(mkdir_p)'
-     AC_SUBST([MKDIR_P])])])
-
-# AC_C_RESTRICT
-# This definition overrides the AC_C_RESTRICT macro from autoconf 2.60..2.61,
-# so that mixed use of GNU C and GNU C++ and mixed use of Sun C and Sun C++
-# works.
-# This definition can be removed once autoconf >= 2.62 can be assumed.
-m4_if(m4_version_compare(m4_defn([m4_PACKAGE_VERSION]),[2.62]),[-1],[
-AC_DEFUN([AC_C_RESTRICT],
-[AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict],
-  [ac_cv_c_restrict=no
-   # The order here caters to the fact that C++ does not require restrict.
-   for ac_kw in __restrict __restrict__ _Restrict restrict; do
-     AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
-      [[typedef int * int_ptr;
-        int foo (int_ptr $ac_kw ip) {
-        return ip[0];
-       }]],
-      [[int s[1];
-        int * $ac_kw t = s;
-        t[0] = 0;
-        return foo(t)]])],
-      [ac_cv_c_restrict=$ac_kw])
-     test "$ac_cv_c_restrict" != no && break
-   done
-  ])
- AH_VERBATIM([restrict],
-[/* Define to the equivalent of the C99 'restrict' keyword, or to
-   nothing if this is not supported.  Do not define if restrict is
-   supported directly.  */
-#undef restrict
-/* Work around a bug in Sun C++: it does not support _Restrict, even
-   though the corresponding Sun C compiler does, which causes
-   "#define restrict _Restrict" in the previous line.  Perhaps some future
-   version of Sun C++ will work with _Restrict; if so, it'll probably
-   define __RESTRICT, just as Sun C does.  */
-#if defined __SUNPRO_CC && !defined __RESTRICT
-# define _Restrict
-#endif])
- case $ac_cv_c_restrict in
-   restrict) ;;
-   no) AC_DEFINE([restrict], []) ;;
-   *)  AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;;
- esac
-])
-])
-
-# gl_BIGENDIAN
-# is like AC_C_BIGENDIAN, except that it can be AC_REQUIREd.
-# Note that AC_REQUIRE([AC_C_BIGENDIAN]) does not work reliably because some
-# macros invoke AC_C_BIGENDIAN with arguments.
-AC_DEFUN([gl_BIGENDIAN],
-[
-  AC_C_BIGENDIAN
-])
-
-# gl_CACHE_VAL_SILENT(cache-id, command-to-set-it)
-# is like AC_CACHE_VAL(cache-id, command-to-set-it), except that it does not
-# output a spurious "(cached)" mark in the midst of other configure output.
-# This macro should be used instead of AC_CACHE_VAL when it is not surrounded
-# by an AC_MSG_CHECKING/AC_MSG_RESULT pair.
-AC_DEFUN([gl_CACHE_VAL_SILENT],
-[
-  saved_as_echo_n="$as_echo_n"
-  as_echo_n=':'
-  AC_CACHE_VAL([$1], [$2])
-  as_echo_n="$saved_as_echo_n"
-])