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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [config/] [override.m4] - Rev 30
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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])])]) ]) ])
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