newlib-cygwin/config/override.m4

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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],
Regenerate tree using Autoconf 2.64 and Automake 1.11. config/: * override.m4 (_GCC_AUTOCONF_VERSION): Bump to 2.64. /: * configure: Regenerate. etc/: * configure: Regenerate. sim/common/: * config.in: Regenerate. * configure: Likewise. sim/iq2000/: * config.in: Regenerate. * configure: Likewise. sim/d10v/: * config.in: Regenerate. * configure: Likewise. sim/igen/: * config.in: Regenerate. * configure: Likewise. sim/m32r/: * config.in: Regenerate. * configure: Likewise. sim/frv/: * config.in: Regenerate. * configure: Likewise. sim/: * avr/config.in: Regenerate. * avr/configure: Likewise. * configure: Likewise. * cris/config.in: Likewise. * cris/configure: Likewise. sim/h8300/: * config.in: Regenerate. * configure: Likewise. sim/mn10300/: * config.in: Regenerate. * configure: Likewise. sim/ppc/: * config.in: Regenerate. * configure: Likewise. sim/erc32/: * config.in: Regenerate. * configure: Likewise. sim/arm/: * config.in: Regenerate. * configure: Likewise. sim/m68hc11/: * config.in: Regenerate. * configure: Likewise. sim/lm32/: * config.in: Regenerate. * configure: Likewise. sim/sh64/: * config.in: Regenerate. * configure: Likewise. sim/v850/: * config.in: Regenerate. * configure: Likewise. sim/cr16/: * config.in: Regenerate. * configure: Likewise. sim/moxie/: * config.in: Regenerate. * configure: Likewise. sim/m32c/: * config.in: Regenerate. * configure: Likewise. sim/mips/: * config.in: Regenerate. * configure: Likewise. sim/mcore/: * config.in: Regenerate. * configure: Likewise. sim/testsuite/d10v-elf/: * configure: Regenerate. sim/testsuite/: * configure: Regenerate. sim/testsuite/frv-elf/: * configure: Regenerate. sim/testsuite/m32r-elf/: * configure: Regenerate. sim/testsuite/mips64el-elf/: * configure: Regenerate. sim/sh/: * config.in: Regenerate. * configure: Likewise. gold/: * Makefile.in: Regenerate. * aclocal.m4: Likewise. * config.in: Likewise. * configure: Likewise. * testsuite/Makefile.in: Likewise. gprof/: * Makefile.in: Regenerate. * aclocal.m4: Likewise. * configure: Likewise. * gconfig.in: Likewise. opcodes/: * Makefile.in: Regenerate. * aclocal.m4: Likewise. * config.in: Likewise. * configure: Likewise. gas/: * Makefile.in: Regenerate. * aclocal.m4: Likewise. * config.in: Likewise. * configure: Likewise. * doc/Makefile.in: Likewise. ld/: * Makefile.in: Regenerate. * aclocal.m4: Likewise. * config.in: Likewise. * configure: Likewise. gdb/: * aclocal.m4: Regenerate. * config.in: Likewise. * configure: Likewise. * gnulib/Makefile.in: Likewise. gdb/doc/: * configure: Regenerate. gdb/gdbserver/: * aclocal.m4: Regenerate. * config.in: Likewise. * configure: Likewise. gdb/testsuite/: * configure: Regenerate. * gdb.hp/configure: Likewise. * gdb.hp/gdb.aCC/configure: Likewise. * gdb.hp/gdb.base-hp/configure: Likewise. * gdb.hp/gdb.compat/configure: Likewise. * gdb.hp/gdb.defects/configure: Likewise. * gdb.hp/gdb.objdbg/configure: Likewise. * gdb.stabs/configure: Likewise. binutils/: * Makefile.in: Regenerate. * aclocal.m4: Likewise. * config.in: Likewise. * configure: Likewise. * doc/Makefile.in: Likewise. bfd/: * Makefile.in: Regenerate. * aclocal.m4: Likewise. * config.in: Likewise. * configure: Likewise. bfd/doc/: * Makefile.in: Regenerate. readline/: * configure: Regenerate. readline/examples/rlfe/: * configure: Regenerate.
2009-08-23 00:56:38 +08:00
[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])])])
])
])