| 1 | dnl Fix Autoconf-2.59 bugs: by overriding broken internal |
| 2 | dnl Autoconf macros with backports of the 2.60+ fix. |
| 3 | dnl - AC_CONFIG_SUBDIRS whitespace mangling, |
| 4 | dnl - more lenient precious variable checks |
| 5 | dnl - better configure error message |
| 6 | dnl - reliance on non-Posix m4wrap (M4 1.6 or newer implement FIFO) |
| 7 | dnl |
| 8 | dnl The override bits of this file should be a no-op for the newest |
| 9 | dnl Autoconf version, which means they can be removed once the complete |
| 10 | dnl tree has moved to a new enough Autoconf version. |
| 11 | dnl |
| 12 | dnl The _GCC_AUTOCONF_VERSION_TEST ensures that exactly the desired |
| 13 | dnl Autoconf version is used. It should be kept for consistency. |
| 14 | |
| 15 | dnl Provide m4_copy_force and m4_rename_force for old Autoconf versions. |
| 16 | |
| 17 | m4_ifndef([m4_copy_force], |
| 18 | [m4_define([m4_copy_force], |
| 19 | [m4_ifdef([$2], [m4_undefine([$2])])m4_copy($@)])]) |
| 20 | |
| 21 | m4_ifndef([m4_rename_force], |
| 22 | [m4_define([m4_rename_force], |
| 23 | [m4_ifdef([$2], [m4_undefine([$2])])m4_rename($@)])]) |
| 24 | |
| 25 | dnl m4_PACKAGE_VERSION is an undocumented Autoconf macro. |
| 26 | dnl We use it because this fix is intended for 2.59 only. |
| 27 | dnl A feature test for the broken AC_CONFIG_SUBDIRS instead |
| 28 | dnl would be better but is tricky. |
| 29 | dnl |
| 30 | dnl Use ifdef/ifelse over m4_ifdef/m4_ifelse to be clean for 2.13. |
| 31 | dnl Redefine AC_CONFIG_SUBDIRS so aclocal pulls in this file |
| 32 | dnl when needed. |
| 33 | |
| 34 | ifdef([m4_PACKAGE_VERSION], |
| 35 | [dnl AC_DEFUN a commonly used macro so this file is picked up. |
| 36 | m4_copy([AC_PREREQ], [_AC_PREREQ]) |
| 37 | AC_DEFUN([AC_PREREQ], [frob]) |
| 38 | m4_copy_force([_AC_PREREQ], [AC_PREREQ]) |
| 39 | |
| 40 | |
| 41 | dnl Ensure exactly this Autoconf version is used |
| 42 | m4_ifndef([_GCC_AUTOCONF_VERSION], |
| 43 | [m4_define([_GCC_AUTOCONF_VERSION], [2.64])]) |
| 44 | |
| 45 | dnl Test for the exact version when AC_INIT is expanded. |
| 46 | dnl This allows to update the tree in steps (for testing) |
| 47 | dnl by putting |
| 48 | dnl m4_define([_GCC_AUTOCONF_VERSION], [X.Y]) |
| 49 | dnl in configure.ac before AC_INIT, |
| 50 | dnl without rewriting this file. |
| 51 | dnl Or for updating the whole tree at once with the definition above. |
| 52 | AC_DEFUN([_GCC_AUTOCONF_VERSION_CHECK], |
| 53 | [m4_if(m4_defn([_GCC_AUTOCONF_VERSION]), |
| 54 | m4_defn([m4_PACKAGE_VERSION]), [], |
| 55 | [m4_fatal([Please use exactly Autoconf ]_GCC_AUTOCONF_VERSION[ instead of ]m4_defn([m4_PACKAGE_VERSION])[.])]) |
| 56 | ]) |
| 57 | m4_define([AC_INIT], m4_defn([AC_INIT])[ |
| 58 | _GCC_AUTOCONF_VERSION_CHECK |
| 59 | ]) |
| 60 | |
| 61 | |
| 62 | dnl Turn AC_DISABLE_OPTION_CHECKING into a no-op if not defined. |
| 63 | m4_ifndef([AC_DISABLE_OPTION_CHECKING], |
| 64 | [m4_define([AC_DISABLE_OPTION_CHECKING])]) |
| 65 | |
| 66 | |
| 67 | dnl Fix 2.64 cross compile detection for AVR and RTEMS |
| 68 | dnl by not trying to compile fopen. |
| 69 | m4_if(m4_defn([m4_PACKAGE_VERSION]), [2.64], |
| 70 | [m4_foreach([_GCC_LANG], [C, C++, Fortran, Fortran 77], |
| 71 | [m4_define([_AC_LANG_IO_PROGRAM(]_GCC_LANG[)], m4_defn([AC_LANG_PROGRAM(]_GCC_LANG[)]))])]) |
| 72 | |
| 73 | |
| 74 | m4_version_prereq([2.60],, [ |
| 75 | dnl We use $ac_pwd in some of the overrides below; ensure its definition |
| 76 | m4_divert_push([PARSE_ARGS])dnl |
| 77 | ac_pwd=`pwd` |
| 78 | m4_divert_pop([PARSE_ARGS])dnl |
| 79 | ]) |
| 80 | |
| 81 | |
| 82 | m4_version_prereq([2.60],, [ |
| 83 | |
| 84 | # _AC_OUTPUT_SUBDIRS |
| 85 | # ------------------ |
| 86 | # This is a subroutine of AC_OUTPUT, but it does not go into |
| 87 | # config.status, rather, it is called after running config.status. |
| 88 | m4_define([_AC_OUTPUT_SUBDIRS], |
| 89 | [ |
| 90 | # |
| 91 | # CONFIG_SUBDIRS section, as fixed in confsubdir.m4. |
| 92 | # |
| 93 | if test "$no_recursion" != yes; then |
| 94 | |
| 95 | # Remove --cache-file and --srcdir arguments so they do not pile up. |
| 96 | ac_sub_configure_args= |
| 97 | ac_prev= |
| 98 | eval "set x $ac_configure_args" |
| 99 | shift |
| 100 | for ac_arg |
| 101 | do |
| 102 | if test -n "$ac_prev"; then |
| 103 | ac_prev= |
| 104 | continue |
| 105 | fi |
| 106 | case $ac_arg in |
| 107 | -cache-file | --cache-file | --cache-fil | --cache-fi \ |
| 108 | | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c) |
| 109 | ac_prev=cache_file ;; |
| 110 | -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \ |
| 111 | | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* \ |
| 112 | | --c=*) |
| 113 | ;; |
| 114 | --config-cache | -C) |
| 115 | ;; |
| 116 | -srcdir | --srcdir | --srcdi | --srcd | --src | --sr) |
| 117 | ac_prev=srcdir ;; |
| 118 | -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*) |
| 119 | ;; |
| 120 | -prefix | --prefix | --prefi | --pref | --pre | --pr | --p) |
| 121 | ac_prev=prefix ;; |
| 122 | -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*) |
| 123 | ;; |
| 124 | *) |
| 125 | case $ac_arg in |
| 126 | *\'*) ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;; |
| 127 | esac |
| 128 | ac_sub_configure_args="$ac_sub_configure_args '$ac_arg'" ;; |
| 129 | esac |
| 130 | done |
| 131 | |
| 132 | # Always prepend --prefix to ensure using the same prefix |
| 133 | # in subdir configurations. |
| 134 | ac_arg="--prefix=$prefix" |
| 135 | case $ac_arg in |
| 136 | *\'*) ac_arg=`echo "$ac_arg" | sed "s/'/'\\\\\\\\''/g"` ;; |
| 137 | esac |
| 138 | ac_sub_configure_args="$ac_arg $ac_sub_configure_args" |
| 139 | |
| 140 | ac_popdir=`pwd` |
| 141 | for ac_dir in : $subdirs; do test "x$ac_dir" = x: && continue |
| 142 | |
| 143 | # Do not complain, so a configure script can configure whichever |
| 144 | # parts of a large source tree are present. |
| 145 | test -d "$srcdir/$ac_dir" || continue |
| 146 | |
| 147 | AC_MSG_NOTICE([configuring in $ac_dir]) |
| 148 | AS_MKDIR_P(["$ac_dir"]) |
| 149 | _AC_SRCPATHS(["$ac_dir"]) |
| 150 | |
| 151 | cd "$ac_dir" |
| 152 | |
| 153 | # Check for guested configure; otherwise get Cygnus style configure. |
| 154 | if test -f "$ac_srcdir/configure.gnu"; then |
| 155 | ac_sub_configure=$ac_srcdir/configure.gnu |
| 156 | elif test -f "$ac_srcdir/configure"; then |
| 157 | ac_sub_configure=$ac_srcdir/configure |
| 158 | elif test -f "$ac_srcdir/configure.in"; then |
| 159 | # This should be Cygnus configure. |
| 160 | ac_sub_configure=$ac_aux_dir/configure |
| 161 | else |
| 162 | AC_MSG_WARN([no configuration information is in $ac_dir]) |
| 163 | ac_sub_configure= |
| 164 | fi |
| 165 | |
| 166 | # The recursion is here. |
| 167 | if test -n "$ac_sub_configure"; then |
| 168 | # Make the cache file name correct relative to the subdirectory. |
| 169 | case $cache_file in |
| 170 | [[\\/]]* | ?:[[\\/]]* ) ac_sub_cache_file=$cache_file ;; |
| 171 | *) # Relative path. |
| 172 | ac_sub_cache_file=$ac_top_builddir$cache_file ;; |
| 173 | esac |
| 174 | |
| 175 | AC_MSG_NOTICE([running $SHELL $ac_sub_configure $ac_sub_configure_args --cache-file=$ac_sub_cache_file --srcdir=$ac_srcdir]) |
| 176 | # The eval makes quoting arguments work. |
| 177 | eval "\$SHELL \"\$ac_sub_configure\" $ac_sub_configure_args \ |
| 178 | --cache-file=\"\$ac_sub_cache_file\" --srcdir=\"\$ac_srcdir\"" || |
| 179 | AC_MSG_ERROR([$ac_sub_configure failed for $ac_dir]) |
| 180 | fi |
| 181 | |
| 182 | cd "$ac_popdir" |
| 183 | done |
| 184 | fi |
| 185 | ])# _AC_OUTPUT_SUBDIRS |
| 186 | ]) |
| 187 | |
| 188 | m4_version_prereq([2.63],, [ |
| 189 | |
| 190 | # _AC_ARG_VAR_VALIDATE |
| 191 | # -------------------- |
| 192 | # The code is the same as autoconf 2.59, but with a more lenient check |
| 193 | # on precious variables and an output of pwd that have been added in |
| 194 | # autoconf 2.62. |
| 195 | m4_define([_AC_ARG_VAR_VALIDATE], |
| 196 | [m4_divert_text([INIT_PREPARE], |
| 197 | [# Check that the precious variables saved in the cache have kept the same |
| 198 | # value. |
| 199 | ac_cache_corrupted=false |
| 200 | for ac_var in `(set) 2>&1 | |
| 201 | sed -n 's/^ac_env_\([[a-zA-Z_0-9]]*\)_set=.*/\1/p'`; do |
| 202 | eval ac_old_set=\$ac_cv_env_${ac_var}_set |
| 203 | eval ac_new_set=\$ac_env_${ac_var}_set |
| 204 | eval ac_old_val="\$ac_cv_env_${ac_var}_value" |
| 205 | eval ac_new_val="\$ac_env_${ac_var}_value" |
| 206 | case $ac_old_set,$ac_new_set in |
| 207 | set,) |
| 208 | AS_MESSAGE([error: `$ac_var' was set to `$ac_old_val' in the previous run], 2) |
| 209 | ac_cache_corrupted=: ;; |
| 210 | ,set) |
| 211 | AS_MESSAGE([error: `$ac_var' was not set in the previous run], 2) |
| 212 | ac_cache_corrupted=: ;; |
| 213 | ,);; |
| 214 | *) |
| 215 | if test "x$ac_old_val" != "x$ac_new_val"; then |
| 216 | # differences in whitespace do not lead to failure. |
| 217 | ac_old_val_w=`echo x $ac_old_val` |
| 218 | ac_new_val_w=`echo x $ac_new_val` |
| 219 | if test "$ac_old_val_w" != "$ac_new_val_w"; then |
| 220 | AS_MESSAGE([error: `$ac_var' has changed since the previous run:], 2) |
| 221 | ac_cache_corrupted=: |
| 222 | else |
| 223 | AS_MESSAGE([warning: ignoring whitespace changes in `$ac_var' since the previous run:], 2) |
| 224 | eval $ac_var=\$ac_old_val |
| 225 | fi |
| 226 | AS_MESSAGE([ former value: `$ac_old_val'], 2) |
| 227 | AS_MESSAGE([ current value: `$ac_new_val'], 2) |
| 228 | fi;; |
| 229 | esac |
| 230 | # Pass precious variables to config.status. |
| 231 | if test "$ac_new_set" = set; then |
| 232 | case $ac_new_val in |
| 233 | dnl If you change this globbing pattern, test it on an old shell -- |
| 234 | dnl it's sensitive. Putting any kind of quote in it causes syntax errors. |
| 235 | [ *" "*|*" "*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?\"\']*)] |
| 236 | ac_arg=$ac_var=`echo "$ac_new_val" | sed "s/'/'\\\\\\\\''/g"` ;; |
| 237 | *) ac_arg=$ac_var=$ac_new_val ;; |
| 238 | esac |
| 239 | case " $ac_configure_args " in |
| 240 | *" '$ac_arg' "*) ;; # Avoid dups. Use of quotes ensures accuracy. |
| 241 | *) ac_configure_args="$ac_configure_args '$ac_arg'" ;; |
| 242 | esac |
| 243 | fi |
| 244 | done |
| 245 | if $ac_cache_corrupted; then |
| 246 | AS_MESSAGE([error: in `$ac_pwd':], 2) |
| 247 | AS_MESSAGE([error: changes in the environment can compromise the build], 2) |
| 248 | AS_ERROR([run `make distclean' and/or `rm $cache_file' and start over]) |
| 249 | fi])dnl |
| 250 | ])# _AC_ARG_VAR_VALIDATE |
| 251 | ]) |
| 252 | |
| 253 | m4_version_prereq([2.63],, [ |
| 254 | |
| 255 | # AC_MSG_FAILURE(ERROR, [EXIT-STATUS = 1]) |
| 256 | # ---------------------------------------- |
| 257 | # This is the same code as in 2.59 and 2.61, except it also outputs pwd. |
| 258 | m4_define([AC_MSG_FAILURE], |
| 259 | [{ AS_MESSAGE([error: in `$ac_pwd':], 2) |
| 260 | AC_MSG_ERROR([$1 |
| 261 | See `config.log' for more details.], [$2]); }]) |
| 262 | ]) |
| 263 | ]) |
| 264 | |
| 265 | m4_version_prereq([2.60],, [ |
| 266 | dnl M4 1.6 and newer implement m4wrap using FIFO semantics, as required |
| 267 | dnl by Posix; earlier versions used LIFO semantics. Unfortunately, |
| 268 | dnl Autoconf versions before 2.60 require those LIFO semantics, so |
| 269 | dnl make sure to give it to them. |
| 270 | m4_define([m4_wrap], [m4_ifdef([_$0_text], |
| 271 | [m4_define([_$0_text], [$1]m4_defn([_$0_text]))], |
| 272 | [m4_define([_$0_text], [$1])m4_builtin([m4wrap], |
| 273 | [m4_default(m4_defn([_$0_text])m4_undefine([_$0_text]))])])]) |
| 274 | ]) |