diff options
Diffstat (limited to 'config/override.m4')
| -rw-r--r-- | config/override.m4 | 233 |
1 files changed, 8 insertions, 225 deletions
diff --git a/config/override.m4 b/config/override.m4 index 47d8dac..fc2d527 100644 --- a/config/override.m4 +++ b/config/override.m4 @@ -1,9 +1,5 @@ -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 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 @@ -12,6 +8,9 @@ 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], @@ -22,17 +21,7 @@ m4_ifndef([m4_rename_force], [m4_define([m4_rename_force], [m4_ifdef([$2], [m4_undefine([$2])])m4_rename($@)])]) -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. +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]) @@ -59,220 +48,12 @@ _GCC_AUTOCONF_VERSION_CHECK ]) -dnl Turn AC_DISABLE_OPTION_CHECKING into a no-op if not defined. -m4_ifndef([AC_DISABLE_OPTION_CHECKING], - [m4_define([AC_DISABLE_OPTION_CHECKING])]) - - 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([2.60],, [ -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]))])])]) -]) - m4_version_prereq([2.66],, [ dnl We need AC_CHECK_DECL which works for overloaded C++ functions. @@ -313,3 +94,5 @@ m4_define([_AC_CHECK_DECLS], [m4_ifvaln([$2$3], [AS_IF([test $ac_have_decl = 1], [$2], [$3])])]) ]) + +]) |