Dear Natalie, Am 5/15/2010 10:52 AM, schrieb Natalie Tasman: > I'm working on a build system with autotools. I'd like to > cross-compile, building a mingw/windows executable from linux. So far, > my system works well with the --host option (and appropriate cross tools > installed, from the mingw-cross-env project.) > > I have one target which is actually a utility used during *build* time. > Is it possible to specify one target which should *not* be built with > the cross-compiler, but natively instead? > > I've considered creating a separate config.ac/Makefile.am for this one > executable, but am hoping to find a simpler solution. > > (It was suggested that I post here over at the automake list). I had a similar problem, see e.g. http://www.mail-archive.com/automake@xxxxxxx/msg14826.html My solution to the problem was to create a new macro AC_CONIG_SUBDIR_CUSTOM([path to sub-configure], [your configure arguments]) based on AC_CONFIG_SUBDIR. As the new macro uses some autoconf internals I implemented it in autoconf's status.m4. To not alter the autoconf installation, I put the modified status.m4 in my AC_CONFIG_MACRO_DIR. If you call the macro with an empty argument list, it will call the sub-configure with the top-level --prefix, --disable-option-checking, --cache-file=/dev/null and the --srcdir option. To use some of the options provided to the toplevel configure in the custom sub-configure, I write all user provided configure arguments to file and process this file in a second step. Please find attached a patch to be applied on autoconf's 2.65. status.m4. Hope that helps. Best regards, Christian
196c196 < # MODE is `FILES', `HEADERS', `LINKS', `COMMANDS', or `SUBDIRS'. --- > # MODE is `FILES', `HEADERS', `LINKS', `COMMANDS', `SUBDIRS' or CONFIG_SUBDIR_CUSTOM. 1093c1093 < [m4_map_args_w([$1], [_AC_CONFIG_UNIQUE([SUBDIRS], --- > [m4_map_args_w([$1], [_AC_CONFIG_UNIQUE([SUBDIRS or CONFIG_SUBDIR_CUSTOM], 1101a1102,1135 > # AC_CONFIG_SUBDIR_CUSTOM(DIR, ARGUMENTS [, DISABLE_HELP_RECURSIVE]) > # ------------------------------------------------------------------ > # Build a list custom_subdirs of tuples (DIR, ARGUMENTS) where DIR is > # unique in _AC_LIST_CUSTOM_SUBDIRS and _AC_LIST_SUBDIRS. This list is used in > # _AC_OUTPUT_SUBDIRS to invoke nested configures in directory DIR with > # arguments ARGUMENTS. The arguments are modified as in the AC_CONFIG_SUBDIRS > # case, see _AC_SUB_CONFIGURE_ARGS. If the third argument > # DISABLE_HELP_RECURSIVE is given, configure --help=recursive will omit DIR. > AC_DEFUN([AC_CONFIG_SUBDIR_CUSTOM], > [AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl > AC_REQUIRE([AC_DISABLE_OPTION_CHECKING])dnl > m4_foreach_w([_AC_Sub], [$1], > [_AC_CONFIG_UNIQUE([SUBDIRS or CONFIG_SUBDIR_CUSTOM], > m4_bpatsubst(m4_defn([_AC_Sub]), [:.*]))])dnl > > # build a list of (directory,arguments) tuples that will be processed in _AC_OUTPUT_SUBDIRS > if test -z "$custom_subdirs"; then > custom_subdirs="custom_sub_configure_dir=\"m4_normalize([$1])\";custom_sub_configure_args=\"m4_normalize([$2])\"" > else > custom_subdirs="$custom_subdirs|custom_sub_configure_dir=\"m4_normalize([$1])\";custom_sub_configure_args=\"m4_normalize([$2])\"" > fi > > # per default, enable --help=recursive in directory $1. > m4_ifval([$3], > [], > [m4_append([_AC_LIST_SUBDIRS], [$1], [ > ])dnl > ])dnl > AS_LITERAL_IF([$1], [], > [AC_DIAGNOSE([syntax], [$0: you should use literals])])dnl > AC_SUBST([subdirs_custom], ["$subdirs_custom m4_normalize([$1])"])dnl > ]) # AC_CONFIG_SUBDIR_CUSTOM > > 1111a1146,1178 > ac_popdir=`pwd` > > # call configures in list $custom_subdirs with directory-specific arguments. > OIFS=$IFS > IFS='|' > list=$custom_subdirs > for dir_and_args in $list; do > IFS=$OIFS > eval $dir_and_args > if test "x$custom_sub_configure_dir" = x; then continue; fi > ac_custom_sub_configure_args= > _AC_SUB_CONFIGURE_ARGS([$custom_sub_configure_args], > [ac_custom_sub_configure_args]) > _AC_SUB_CONFIGURE([$custom_sub_configure_dir], > [$ac_custom_sub_configure_args]) > cd "$ac_popdir" > IFS='|' > done > IFS=$OIFS > > # call configures in $subdirs with fixed arguments. > ac_sub_configure_args= > _AC_SUB_CONFIGURE_ARGS([$ac_configure_args], > [ac_sub_configure_args]) > for ac_dir in : $subdirs; do test "x$ac_dir" = x: && continue > echo "ac_dir(inside): $ac_dir" > _AC_SUB_CONFIGURE([$ac_dir], > [$ac_sub_configure_args]) > cd "$ac_popdir" > done > fi > ])# _AC_OUTPUT_SUBDIRS > 1112a1180,1184 > # _AC_SUB_CONFIGURE_ARGS(ARGUMENTS_IN, ARGUMENTS_OUT) > # --------------------------------------------------- > # Create ARGUMENTS_OUT from ARGUMENTS_IN for use in nested configure calls. > m4_define([_AC_SUB_CONFIGURE_ARGS], > [ 1117c1189 < eval "set x $ac_configure_args" --- > eval "set x $1" 1149c1221,1223 < AS_VAR_APPEND([ac_sub_configure_args], [" '$ac_arg'"]) ;; --- > #AS_VAR_APPEND([ac_sub_configure_args], [" '$ac_arg'"]) ;; > #AS_VAR_APPEND([$$2], [" '$ac_arg'"]) ;; > AS_VAR_APPEND([$2], [" '$ac_arg'"]) ;; 1159c1233 < ac_sub_configure_args="'$ac_arg' $ac_sub_configure_args" --- > $2="'$ac_arg' $$2" 1163c1237 < ac_sub_configure_args="--silent $ac_sub_configure_args" --- > $2="--silent $$2" 1168,1171c1242,1243 < ac_sub_configure_args="--disable-option-checking $ac_sub_configure_args" < < ac_popdir=`pwd` < for ac_dir in : $subdirs; do test "x$ac_dir" = x: && continue --- > $2="--disable-option-checking $$2" > ])# _AC_SUB_CONFIGURE_ARGS 1173,1196d1244 < # 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="=== configuring in $ac_dir (`pwd`/$ac_dir)" < _AS_ECHO_LOG([$ac_msg]) < _AS_ECHO([$ac_msg]) < AS_MKDIR_P(["$ac_dir"]) < _AC_SRCDIRS(["$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 $ac_dir]) < ac_sub_configure= < fi 1198,1205c1246,1252 < # The recursion is here. < if test -n "$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 name. < ac_sub_cache_file=$ac_top_build_prefix$cache_file ;; < esac --- > # _AC_SUB_CONFIGURE(DIR, ARGUMENTS) > # --------------------------------- > # Call nested configure in DIR with arguments ARGUMENTS. > m4_define([_AC_SUB_CONFIGURE], > [ > sub_configure_dir=$1 > sub_configure_args=$2 1207,1212c1254,1277 < 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 $ac_dir]) < fi --- > # Do not complain, so a configure script can configure whichever > # parts of a large source tree are present. > test -d "$srcdir/$sub_configure_dir" || continue > > ac_msg="=== configuring in $sub_configure_dir (`pwd`/$sub_configure_dir)" > _AS_ECHO_LOG([$ac_msg]) > _AS_ECHO([$ac_msg]) > AS_MKDIR_P(["$sub_configure_dir"]) > _AC_SRCDIRS(["$sub_configure_dir"]) > > cd "$sub_configure_dir" > > # Check for guested configure; otherwise get Cygnus style configure. > if test -f "$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 $sub_configure_dir]) > ac_sub_configure= > fi 1214,1217c1279,1286 < cd "$ac_popdir" < done < fi < ])# _AC_OUTPUT_SUBDIRS --- > # 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 name. > ac_sub_cache_file=$ac_top_build_prefix$cache_file ;; > esac 1218a1288,1294 > AC_MSG_NOTICE([running $SHELL $ac_sub_configure $sub_configure_args --cache-file=$ac_sub_cache_file --srcdir=$ac_srcdir]) > # The eval makes quoting arguments work. > eval "\$SHELL \"\$ac_sub_configure\" $sub_configure_args \ > --cache-file=\"\$ac_sub_cache_file\" --srcdir=\"\$ac_srcdir\"" || > AC_MSG_ERROR([$ac_sub_configure failed for $sub_configure_dir]) > fi > ])# _AC_SUB_CONFIGURE 1300c1376,1379 < AC_PROVIDE_IFELSE([AC_CONFIG_SUBDIRS], [_AC_OUTPUT_SUBDIRS()])dnl --- > AC_PROVIDE_IFELSE([AC_CONFIG_SUBDIRS], > [_AC_OUTPUT_SUBDIRS()], > [AC_PROVIDE_IFELSE([AC_CONFIG_SUBDIR_CUSTOM], > [_AC_OUTPUT_SUBDIRS()])])dnl
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