262 lines
8.9 KiB
Plaintext
262 lines
8.9 KiB
Plaintext
dnl Fix Autoconf-2.59 bugs: by overriding broken internal
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dnl Autoconf macros with backports of the 2.60+ fix.
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dnl - AC_CONFIG_SUBDIRS whitespace mangling,
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dnl - more lenient precious variable checks
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dnl - better configure error message
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dnl - reliance on non-Posix m4wrap (M4 1.6 or newer implement FIFO)
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dnl
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dnl The override bits of this file should be a no-op for the newest
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dnl Autoconf version, which means they can be removed once the complete
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dnl tree has moved to a new enough Autoconf version.
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dnl
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dnl The _GCC_AUTOCONF_VERSION_TEST ensures that exactly the desired
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dnl Autoconf version is used. It should be kept for consistency.
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dnl Provide m4_copy_force and m4_rename_force for old Autoconf versions.
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m4_ifndef([m4_copy_force],
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[m4_define([m4_copy_force],
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[m4_ifdef([$2], [m4_undefine([$2])])m4_copy($@)])])
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m4_ifndef([m4_rename_force],
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[m4_define([m4_rename_force],
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[m4_ifdef([$2], [m4_undefine([$2])])m4_rename($@)])])
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dnl m4_PACKAGE_VERSION is an undocumented Autoconf macro.
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dnl We use it because this fix is intended for 2.59 only.
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dnl A feature test for the broken AC_CONFIG_SUBDIRS instead
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dnl would be better but is tricky.
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dnl
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dnl Use ifdef/ifelse over m4_ifdef/m4_ifelse to be clean for 2.13.
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dnl Redefine AC_CONFIG_SUBDIRS so aclocal pulls in this file
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dnl when needed.
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ifdef([m4_PACKAGE_VERSION],
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[dnl AC_DEFUN a commonly used macro so this file is picked up.
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m4_copy([AC_PREREQ], [_AC_PREREQ])
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AC_DEFUN([AC_PREREQ], [frob])
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m4_copy_force([_AC_PREREQ], [AC_PREREQ])
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dnl Ensure exactly this Autoconf version is used
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m4_ifndef([_GCC_AUTOCONF_VERSION],
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[m4_define([_GCC_AUTOCONF_VERSION], [2.59])])
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dnl Test for the exact version when AC_INIT is expanded.
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dnl This allows to update the tree in steps (for testing)
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dnl by putting
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dnl m4_define([_GCC_AUTOCONF_VERSION], [X.Y])
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dnl in configure.ac before AC_INIT,
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dnl without rewriting this file.
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dnl Or for updating the whole tree at once with the definition above.
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AC_DEFUN([_GCC_AUTOCONF_VERSION_CHECK],
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[m4_if(m4_defn([_GCC_AUTOCONF_VERSION]),
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m4_defn([m4_PACKAGE_VERSION]), [],
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[m4_fatal([Please use exactly Autoconf ]_GCC_AUTOCONF_VERSION[ instead of ]m4_defn([m4_PACKAGE_VERSION])[.])])
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])
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m4_define([AC_INIT], m4_defn([AC_INIT])[
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_GCC_AUTOCONF_VERSION_CHECK
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])
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m4_version_prereq([2.60],, [
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dnl We use $ac_pwd in some of the overrides below; ensure its definition
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m4_divert_push([PARSE_ARGS])dnl
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ac_pwd=`pwd`
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m4_divert_pop([PARSE_ARGS])dnl
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])
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m4_version_prereq([2.60],, [
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# _AC_OUTPUT_SUBDIRS
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# ------------------
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# This is a subroutine of AC_OUTPUT, but it does not go into
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# config.status, rather, it is called after running config.status.
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m4_define([_AC_OUTPUT_SUBDIRS],
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[
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#
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# CONFIG_SUBDIRS section, as fixed in confsubdir.m4.
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#
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if test "$no_recursion" != yes; then
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# Remove --cache-file and --srcdir arguments so they do not pile up.
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ac_sub_configure_args=
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ac_prev=
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eval "set x $ac_configure_args"
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shift
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for ac_arg
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do
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if test -n "$ac_prev"; then
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ac_prev=
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continue
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fi
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case $ac_arg in
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-cache-file | --cache-file | --cache-fil | --cache-fi \
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| --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
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ac_prev=cache_file ;;
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-cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
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| --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* \
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| --c=*)
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;;
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--config-cache | -C)
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;;
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-srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
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ac_prev=srcdir ;;
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-srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
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;;
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-prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
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ac_prev=prefix ;;
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-prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
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;;
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*)
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case $ac_arg in
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*\'*) ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
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esac
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ac_sub_configure_args="$ac_sub_configure_args '$ac_arg'" ;;
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esac
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done
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# Always prepend --prefix to ensure using the same prefix
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# in subdir configurations.
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ac_arg="--prefix=$prefix"
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case $ac_arg in
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*\'*) ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;;
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esac
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ac_sub_configure_args="$ac_arg $ac_sub_configure_args"
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ac_popdir=`pwd`
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for ac_dir in : $subdirs; do test "x$ac_dir" = x: && continue
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# Do not complain, so a configure script can configure whichever
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# parts of a large source tree are present.
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test -d "$srcdir/$ac_dir" || continue
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AC_MSG_NOTICE([configuring in $ac_dir])
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AS_MKDIR_P(["$ac_dir"])
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_AC_SRCPATHS(["$ac_dir"])
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cd "$ac_dir"
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# Check for guested configure; otherwise get Cygnus style configure.
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if test -f "$ac_srcdir/configure.gnu"; then
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ac_sub_configure=$ac_srcdir/configure.gnu
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elif test -f "$ac_srcdir/configure"; then
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ac_sub_configure=$ac_srcdir/configure
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elif test -f "$ac_srcdir/configure.in"; then
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# This should be Cygnus configure.
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ac_sub_configure=$ac_aux_dir/configure
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else
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AC_MSG_WARN([no configuration information is in $ac_dir])
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ac_sub_configure=
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fi
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# The recursion is here.
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if test -n "$ac_sub_configure"; then
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# Make the cache file name correct relative to the subdirectory.
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case $cache_file in
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[[\\/]]* | ?:[[\\/]]* ) ac_sub_cache_file=$cache_file ;;
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*) # Relative path.
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ac_sub_cache_file=$ac_top_builddir$cache_file ;;
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esac
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AC_MSG_NOTICE([running $SHELL $ac_sub_configure $ac_sub_configure_args --cache-file=$ac_sub_cache_file --srcdir=$ac_srcdir])
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# The eval makes quoting arguments work.
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eval "\$SHELL \"\$ac_sub_configure\" $ac_sub_configure_args \
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--cache-file=\"\$ac_sub_cache_file\" --srcdir=\"\$ac_srcdir\"" ||
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AC_MSG_ERROR([$ac_sub_configure failed for $ac_dir])
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fi
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cd "$ac_popdir"
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done
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fi
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])# _AC_OUTPUT_SUBDIRS
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])
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m4_version_prereq([2.63],, [
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# _AC_ARG_VAR_VALIDATE
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# --------------------
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# The code is the same as autoconf 2.59, but with a more lenient check
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# on precious variables and an output of pwd that have been added in
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# autoconf 2.62.
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m4_define([_AC_ARG_VAR_VALIDATE],
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[m4_divert_text([INIT_PREPARE],
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[# Check that the precious variables saved in the cache have kept the same
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# value.
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ac_cache_corrupted=false
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for ac_var in `(set) 2>&1 |
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sed -n 's/^ac_env_\([[a-zA-Z_0-9]]*\)_set=.*/\1/p'`; do
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eval ac_old_set=\$ac_cv_env_${ac_var}_set
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eval ac_new_set=\$ac_env_${ac_var}_set
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eval ac_old_val="\$ac_cv_env_${ac_var}_value"
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eval ac_new_val="\$ac_env_${ac_var}_value"
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case $ac_old_set,$ac_new_set in
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set,)
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AS_MESSAGE([error: `$ac_var' was set to `$ac_old_val' in the previous run], 2)
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ac_cache_corrupted=: ;;
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,set)
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AS_MESSAGE([error: `$ac_var' was not set in the previous run], 2)
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ac_cache_corrupted=: ;;
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,);;
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*)
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if test "x$ac_old_val" != "x$ac_new_val"; then
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# differences in whitespace do not lead to failure.
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ac_old_val_w=`echo x $ac_old_val`
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ac_new_val_w=`echo x $ac_new_val`
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if test "$ac_old_val_w" != "$ac_new_val_w"; then
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AS_MESSAGE([error: `$ac_var' has changed since the previous run:], 2)
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ac_cache_corrupted=:
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else
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AS_MESSAGE([warning: ignoring whitespace changes in `$ac_var' since the previous run:], 2)
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eval $ac_var=\$ac_old_val
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fi
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AS_MESSAGE([ former value: `$ac_old_val'], 2)
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AS_MESSAGE([ current value: `$ac_new_val'], 2)
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fi;;
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esac
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# Pass precious variables to config.status.
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if test "$ac_new_set" = set; then
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case $ac_new_val in
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dnl If you change this globbing pattern, test it on an old shell --
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dnl it's sensitive. Putting any kind of quote in it causes syntax errors.
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[ *" "*|*" "*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\"\']*)]
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ac_arg=$ac_var=`echo "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;;
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*) ac_arg=$ac_var=$ac_new_val ;;
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esac
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case " $ac_configure_args " in
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*" '$ac_arg' "*) ;; # Avoid dups. Use of quotes ensures accuracy.
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*) ac_configure_args="$ac_configure_args '$ac_arg'" ;;
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esac
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fi
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done
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if $ac_cache_corrupted; then
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AS_MESSAGE([error: in `$ac_pwd':], 2)
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AS_MESSAGE([error: changes in the environment can compromise the build], 2)
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AS_ERROR([run `make distclean' and/or `rm $cache_file' and start over])
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fi])dnl
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])# _AC_ARG_VAR_VALIDATE
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])
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m4_version_prereq([2.63],, [
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# AC_MSG_FAILURE(ERROR, [EXIT-STATUS = 1])
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# ----------------------------------------
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# This is the same code as in 2.59 and 2.61, except it also outputs pwd.
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m4_define([AC_MSG_FAILURE],
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[{ AS_MESSAGE([error: in `$ac_pwd':], 2)
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AC_MSG_ERROR([$1
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See `config.log' for more details.], [$2]); }])
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])
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])
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m4_version_prereq([2.60],, [
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dnl M4 1.6 and newer implement m4wrap using FIFO semantics, as required
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dnl by Posix; earlier versions used LIFO semantics. Unfortunately,
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dnl Autoconf versions before 2.60 require those LIFO semantics, so
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dnl make sure to give it to them.
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m4_define([m4_wrap], [m4_ifdef([_$0_text],
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[m4_define([_$0_text], [$1]m4_defn([_$0_text]))],
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[m4_define([_$0_text], [$1])m4_builtin([m4wrap],
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[m4_default(m4_defn([_$0_text])m4_undefine([_$0_text]))])])])
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])
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