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|
dnl Fix Autoconf-2.59 bugs: by overriding broken internal
dnl Autoconf macros with backports of the 2.60+ fix.
dnl - AC_CONFIG_SUBDIRS whitespace mangling,
dnl - more lenient precious variable checks
dnl - better configure error message
dnl - reliance on non-Posix m4wrap (M4 1.6 or newer implement FIFO)
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 m4_PACKAGE_VERSION is an undocumented Autoconf macro.
dnl We use it because this fix is intended for 2.59 only.
dnl A feature test for the broken AC_CONFIG_SUBDIRS instead
dnl would be better but is tricky.
dnl
dnl Use ifdef/ifelse over m4_ifdef/m4_ifelse to be clean for 2.13.
dnl Redefine AC_CONFIG_SUBDIRS so aclocal pulls in this file
dnl when needed.
ifdef([m4_PACKAGE_VERSION],
[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([_AC_PREREQ], [AC_PREREQ])
dnl Ensure exactly this Autoconf version is used
m4_ifndef([_GCC_AUTOCONF_VERSION],
[m4_define([_GCC_AUTOCONF_VERSION], [2.59])])
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
])
m4_version_prereq([2.60],, [
dnl We use $ac_pwd in some of the overrides below; ensure its definition
m4_divert_push([PARSE_ARGS])dnl
ac_pwd=`pwd`
m4_divert_pop([PARSE_ARGS])dnl
])
m4_version_prereq([2.60],, [
# _AC_OUTPUT_SUBDIRS
# ------------------
# This is a subroutine of AC_OUTPUT, but it does not go into
# config.status, rather, it is called after running config.status.
m4_define([_AC_OUTPUT_SUBDIRS],
[
#
# CONFIG_SUBDIRS section, as fixed in confsubdir.m4.
#
if test "$no_recursion" != yes; then
# Remove --cache-file and --srcdir arguments so they do not pile up.
ac_sub_configure_args=
ac_prev=
eval "set x $ac_configure_args"
shift
for ac_arg
do
if test -n "$ac_prev"; then
ac_prev=
continue
fi
case $ac_arg in
-cache-file | --cache-file | --cache-fil | --cache-fi \
| --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
ac_prev=cache_file ;;
-cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
| --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* \
| --c=*)
;;
--config-cache | -C)
;;
-srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
ac_prev=srcdir ;;
-srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
;;
-prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
ac_prev=prefix ;;
-prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
;;
*)
case $ac_arg in
*\'*) ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
esac
ac_sub_configure_args="$ac_sub_configure_args '$ac_arg'" ;;
esac
done
# Always prepend --prefix to ensure using the same prefix
# in subdir configurations.
ac_arg="--prefix=$prefix"
case $ac_arg in
*\'*) ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
esac
ac_sub_configure_args="$ac_arg $ac_sub_configure_args"
ac_popdir=`pwd`
for ac_dir in : $subdirs; do test "x$ac_dir" = x: && continue
# Do not complain, so a configure script can configure whichever
# parts of a large source tree are present.
test -d "$srcdir/$ac_dir" || continue
AC_MSG_NOTICE([configuring in $ac_dir])
AS_MKDIR_P(["$ac_dir"])
_AC_SRCPATHS(["$ac_dir"])
cd "$ac_dir"
# Check for guested configure; otherwise get Cygnus style configure.
if test -f "$ac_srcdir/configure.gnu"; then
ac_sub_configure=$ac_srcdir/configure.gnu
elif test -f "$ac_srcdir/configure"; then
ac_sub_configure=$ac_srcdir/configure
elif test -f "$ac_srcdir/configure.in"; then
# This should be Cygnus configure.
ac_sub_configure=$ac_aux_dir/configure
else
AC_MSG_WARN([no configuration information is in $ac_dir])
ac_sub_configure=
fi
# The recursion is here.
if test -n "$ac_sub_configure"; then
# Make the cache file name correct relative to the subdirectory.
case $cache_file in
[[\\/]]* | ?:[[\\/]]* ) ac_sub_cache_file=$cache_file ;;
*) # Relative path.
ac_sub_cache_file=$ac_top_builddir$cache_file ;;
esac
AC_MSG_NOTICE([running $SHELL $ac_sub_configure $ac_sub_configure_args --cache-file=$ac_sub_cache_file --srcdir=$ac_srcdir])
# The eval makes quoting arguments work.
eval "\$SHELL \"\$ac_sub_configure\" $ac_sub_configure_args \
--cache-file=\"\$ac_sub_cache_file\" --srcdir=\"\$ac_srcdir\"" ||
AC_MSG_ERROR([$ac_sub_configure failed for $ac_dir])
fi
cd "$ac_popdir"
done
fi
])# _AC_OUTPUT_SUBDIRS
])
m4_version_prereq([2.63],, [
# _AC_ARG_VAR_VALIDATE
# --------------------
# The code is the same as autoconf 2.59, but with a more lenient check
# on precious variables and an output of pwd that have been added in
# autoconf 2.62.
m4_define([_AC_ARG_VAR_VALIDATE],
[m4_divert_text([INIT_PREPARE],
[# Check that the precious variables saved in the cache have kept the same
# value.
ac_cache_corrupted=false
for ac_var in `(set) 2>&1 |
sed -n 's/^ac_env_\([[a-zA-Z_0-9]]*\)_set=.*/\1/p'`; do
eval ac_old_set=\$ac_cv_env_${ac_var}_set
eval ac_new_set=\$ac_env_${ac_var}_set
eval ac_old_val="\$ac_cv_env_${ac_var}_value"
eval ac_new_val="\$ac_env_${ac_var}_value"
case $ac_old_set,$ac_new_set in
set,)
AS_MESSAGE([error: `$ac_var' was set to `$ac_old_val' in the previous run], 2)
ac_cache_corrupted=: ;;
,set)
AS_MESSAGE([error: `$ac_var' was not set in the previous run], 2)
ac_cache_corrupted=: ;;
,);;
*)
if test "x$ac_old_val" != "x$ac_new_val"; then
# differences in whitespace do not lead to failure.
ac_old_val_w=`echo x $ac_old_val`
ac_new_val_w=`echo x $ac_new_val`
if test "$ac_old_val_w" != "$ac_new_val_w"; then
AS_MESSAGE([error: `$ac_var' has changed since the previous run:], 2)
ac_cache_corrupted=:
else
AS_MESSAGE([warning: ignoring whitespace changes in `$ac_var' since the previous run:], 2)
eval $ac_var=\$ac_old_val
fi
AS_MESSAGE([ former value: `$ac_old_val'], 2)
AS_MESSAGE([ current value: `$ac_new_val'], 2)
fi;;
esac
# Pass precious variables to config.status.
if test "$ac_new_set" = set; then
case $ac_new_val in
dnl If you change this globbing pattern, test it on an old shell --
dnl it's sensitive. Putting any kind of quote in it causes syntax errors.
[ *" "*|*" "*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\"\']*)]
ac_arg=$ac_var=`echo "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
*) ac_arg=$ac_var=$ac_new_val ;;
esac
case " $ac_configure_args " in
*" '$ac_arg' "*) ;; # Avoid dups. Use of quotes ensures accuracy.
*) ac_configure_args="$ac_configure_args '$ac_arg'" ;;
esac
fi
done
if $ac_cache_corrupted; then
AS_MESSAGE([error: in `$ac_pwd':], 2)
AS_MESSAGE([error: changes in the environment can compromise the build], 2)
AS_ERROR([run `make distclean' and/or `rm $cache_file' and start over])
fi])dnl
])# _AC_ARG_VAR_VALIDATE
])
m4_version_prereq([2.63],, [
# AC_MSG_FAILURE(ERROR, [EXIT-STATUS = 1])
# ----------------------------------------
# This is the same code as in 2.59 and 2.61, except it also outputs pwd.
m4_define([AC_MSG_FAILURE],
[{ AS_MESSAGE([error: in `$ac_pwd':], 2)
AC_MSG_ERROR([$1
See `config.log' for more details.], [$2]); }])
])
])
m4_version_prereq([2.60],, [
dnl M4 1.6 and newer implement m4wrap using FIFO semantics, as required
dnl by Posix; earlier versions used LIFO semantics. Unfortunately,
dnl Autoconf versions before 2.60 require those LIFO semantics, so
dnl make sure to give it to them.
m4_define([m4_wrap], [m4_ifdef([_$0_text],
[m4_define([_$0_text], [$1]m4_defn([_$0_text]))],
[m4_define([_$0_text], [$1])m4_builtin([m4wrap],
[m4_default(m4_defn([_$0_text])m4_undefine([_$0_text]))])])])
])
|
