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Diffstat (limited to 'gcc-4.4.0/config/override.m4')
| -rw-r--r-- | gcc-4.4.0/config/override.m4 | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/gcc-4.4.0/config/override.m4 b/gcc-4.4.0/config/override.m4 new file mode 100644 index 000000000..9bb149620 --- /dev/null +++ b/gcc-4.4.0/config/override.m4 @@ -0,0 +1,251 @@ +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]))])])]) +]) |