Subversion Repositories openrisc

dnl Fix Autoconf bugs by overriding broken internal Autoconf

dnl macros with backports of fixes from newer releases.

dnl

dnl The override bits of this file should be a no-op for the newest

dnl Autoconf version, which means they can be removed once the complete

dnl tree has moved to a new enough Autoconf version.

dnl

dnl The _GCC_AUTOCONF_VERSION_TEST ensures that exactly the desired

dnl Autoconf version is used.  It should be kept for consistency.

dnl Use ifdef/ifelse over m4_ifdef/m4_ifelse to be clean for 2.13.

ifdef([m4_PACKAGE_VERSION], [

dnl Provide m4_copy_force and m4_rename_force for old Autoconf versions.

m4_ifndef([m4_copy_force],

[m4_define([m4_copy_force],

[m4_ifdef([$2], [m4_undefine([$2])])m4_copy($@)])])

m4_ifndef([m4_rename_force],

[m4_define([m4_rename_force],

[m4_ifdef([$2], [m4_undefine([$2])])m4_rename($@)])])

dnl AC_DEFUN a commonly used macro so this file is picked up.

m4_copy([AC_PREREQ], [_AC_PREREQ])

AC_DEFUN([AC_PREREQ], [frob])

m4_copy_force([_AC_PREREQ], [AC_PREREQ])

dnl Ensure exactly this Autoconf version is used

m4_ifndef([_GCC_AUTOCONF_VERSION],

  [m4_define([_GCC_AUTOCONF_VERSION], [2.64])])

dnl Test for the exact version when AC_INIT is expanded.

dnl This allows to update the tree in steps (for testing)

dnl by putting

dnl   m4_define([_GCC_AUTOCONF_VERSION], [X.Y])

dnl in configure.ac before AC_INIT,

dnl without rewriting this file.

dnl Or for updating the whole tree at once with the definition above.

AC_DEFUN([_GCC_AUTOCONF_VERSION_CHECK],

[m4_if(m4_defn([_GCC_AUTOCONF_VERSION]),

  m4_defn([m4_PACKAGE_VERSION]), [],

  [m4_fatal([Please use exactly Autoconf ]_GCC_AUTOCONF_VERSION[ instead of ]m4_defn([m4_PACKAGE_VERSION])[.])])

])

m4_define([AC_INIT], m4_defn([AC_INIT])[

_GCC_AUTOCONF_VERSION_CHECK

])

dnl Ensure we do not use a buggy M4.

m4_if(m4_index([..wi.d.], [.d.]), [-1],

  [m4_fatal(m4_do([m4 with buggy strstr detected.  Please install

GNU M4 1.4.16 or newer and set the M4 environment variable]))])

dnl Fix 2.64 cross compile detection for AVR and RTEMS

dnl by not trying to compile fopen.

m4_if(m4_defn([m4_PACKAGE_VERSION]), [2.64],

  [m4_foreach([_GCC_LANG], [C, C++, Fortran, Fortran 77],

     [m4_define([_AC_LANG_IO_PROGRAM(]_GCC_LANG[)], m4_defn([AC_LANG_PROGRAM(]_GCC_LANG[)]))])])

m4_version_prereq([2.66],, [

dnl We need AC_CHECK_DECL which works for overloaded C++ functions.

# _AC_CHECK_DECL_BODY

# -------------------

# Shell function body for AC_CHECK_DECL.

m4_define([_AC_CHECK_DECL_BODY],

[  AS_LINENO_PUSH([$[]1])

  [as_decl_name=`echo $][2|sed 's/ *(.*//'`]

  [as_decl_use=`echo $][2|sed -e 's/(/((/' -e 's/)/) 0&/' -e 's/,/) 0& (/g'`]

  AC_CACHE_CHECK([whether $as_decl_name is declared], [$[]3],

  [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$[]4],

[@%:@ifndef $[]as_decl_name

@%:@ifdef __cplusplus

  (void) $[]as_decl_use;

@%:@else

  (void) $[]as_decl_name;

@%:@endif

@%:@endif

])],

                   [AS_VAR_SET([$[]3], [yes])],

                   [AS_VAR_SET([$[]3], [no])])])

  AS_LINENO_POP

])# _AC_CHECK_DECL_BODY

# _AC_CHECK_DECLS(SYMBOL, ACTION-IF_FOUND, ACTION-IF-NOT-FOUND,

#                 INCLUDES)

# -------------------------------------------------------------

# Helper to AC_CHECK_DECLS, which generates the check for a single

# SYMBOL with INCLUDES, performs the AC_DEFINE, then expands

# ACTION-IF-FOUND or ACTION-IF-NOT-FOUND.

m4_define([_AC_CHECK_DECLS],

[AC_CHECK_DECL([$1], [ac_have_decl=1], [ac_have_decl=0], [$4])]dnl

[AC_DEFINE_UNQUOTED(AS_TR_CPP(m4_bpatsubst(HAVE_DECL_[$1],[ *(.*])),

  [$ac_have_decl],

  [Define to 1 if you have the declaration of `$1',

   and to 0 if you don't.])]dnl

[m4_ifvaln([$2$3], [AS_IF([test $ac_have_decl = 1], [$2], [$3])])])

])

])