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acinclude.m4
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acinclude.m4
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AC_DEFUN([AX_PREFIX_CONFIG_H],[dnl
AC_BEFORE([AC_CONFIG_HEADERS],[$0])dnl
AC_CONFIG_COMMANDS([ifelse($1,,$PACKAGE-config.h,$1)],[dnl
AS_VAR_PUSHDEF([_OUT],[ac_prefix_conf_OUT])dnl
AS_VAR_PUSHDEF([_DEF],[ac_prefix_conf_DEF])dnl
AS_VAR_PUSHDEF([_PKG],[ac_prefix_conf_PKG])dnl
AS_VAR_PUSHDEF([_LOW],[ac_prefix_conf_LOW])dnl
AS_VAR_PUSHDEF([_UPP],[ac_prefix_conf_UPP])dnl
AS_VAR_PUSHDEF([_INP],[ac_prefix_conf_INP])dnl
m4_pushdef([_script],[conftest.prefix])dnl
m4_pushdef([_symbol],[m4_cr_Letters[]m4_cr_digits[]_])dnl
_OUT=`echo ifelse($1, , $PACKAGE-config.h, $1)`
_DEF=`echo _$_OUT | sed -e "y:m4_cr_letters:m4_cr_LETTERS[]:" -e "s/@<:@^m4_cr_Letters@:>@/_/g"`
_PKG=`echo ifelse($2, , $PACKAGE, $2)`
_LOW=`echo _$_PKG | sed -e "y:m4_cr_LETTERS-:m4_cr_letters[]_:"`
_UPP=`echo $_PKG | sed -e "y:m4_cr_letters-:m4_cr_LETTERS[]_:" -e "/^@<:@m4_cr_digits@:>@/s/^/_/"`
_INP=`echo "ifelse($3,,,$3)" | sed -e 's/ *//'`
if test ".$_INP" = "."; then
for ac_file in : $CONFIG_HEADERS; do test "_$ac_file" = _: && continue
case "$ac_file" in
*.h) _INP=$ac_file ;;
*)
esac
test ".$_INP" != "." && break
done
fi
if test ".$_INP" = "."; then
case "$_OUT" in
*/*) _INP=`basename "$_OUT"`
;;
*-*) _INP=`echo "$_OUT" | sed -e "s/@<:@_symbol@:>@*-//"`
;;
*) _INP=config.h
;;
esac
fi
if test -z "$_PKG" ; then
AC_MSG_ERROR([no prefix for _PREFIX_PKG_CONFIG_H])
else
if test ! -f "$_INP" ; then if test -f "$srcdir/$_INP" ; then
_INP="$srcdir/$_INP"
fi fi
AC_MSG_NOTICE(creating $_OUT - prefix $_UPP for $_INP defines)
if test -f $_INP ; then
echo "s/^@%:@undef *\\(@<:@m4_cr_LETTERS[]_@:>@\\)/@%:@undef $_UPP""_\\1/" > _script
echo "s/^@%:@undef *\\(@<:@m4_cr_letters@:>@\\)/@%:@undef $_LOW""_\\1/" >> _script
echo "s/^@%:@def[]ine *\\(@<:@m4_cr_LETTERS[]_@:>@@<:@_symbol@:>@*\\)\\(.*\\)/@%:@ifndef $_UPP""_\\1 \\" >> _script
echo "@%:@def[]ine $_UPP""_\\1 \\2 \\" >> _script
echo "@%:@endif/" >>_script
echo "s/^@%:@def[]ine *\\(@<:@m4_cr_letters@:>@@<:@_symbol@:>@*\\)\\(.*\\)/@%:@ifndef $_LOW""_\\1 \\" >> _script
echo "@%:@define $_LOW""_\\1 \\2 \\" >> _script
echo "@%:@endif/" >> _script
# now executing _script on _DEF input to create _OUT output file
echo "@%:@ifndef $_DEF" >$tmp/pconfig.h
echo "@%:@def[]ine $_DEF 1" >>$tmp/pconfig.h
echo ' ' >>$tmp/pconfig.h
echo /'*' $_OUT. Generated automatically at end of configure. '*'/ >>$tmp/pconfig.h
sed -f _script $_INP >>$tmp/pconfig.h
echo ' ' >>$tmp/pconfig.h
echo '/* once:' $_DEF '*/' >>$tmp/pconfig.h
echo "@%:@endif" >>$tmp/pconfig.h
if cmp -s $_OUT $tmp/pconfig.h 2>/dev/null; then
AC_MSG_NOTICE([$_OUT is unchanged])
else
ac_dir=`AS_DIRNAME(["$_OUT"])`
AS_MKDIR_P(["$ac_dir"])
rm -f "$_OUT"
mv $tmp/pconfig.h "$_OUT"
fi
cp _script _configs.sed
else
AC_MSG_ERROR([input file $_INP does not exist - skip generating $_OUT])
fi
rm -f conftest.*
fi
m4_popdef([_symbol])dnl
m4_popdef([_script])dnl
AS_VAR_POPDEF([_INP])dnl
AS_VAR_POPDEF([_UPP])dnl
AS_VAR_POPDEF([_LOW])dnl
AS_VAR_POPDEF([_PKG])dnl
AS_VAR_POPDEF([_DEF])dnl
AS_VAR_POPDEF([_OUT])dnl
],[PACKAGE="$PACKAGE"])])
dnl implementation note: a bug report (31.5.2005) from Marten Svantesson points
dnl out a problem where `echo "\1"` results in a Control-A. The unix standard
dnl http://www.opengroup.org/onlinepubs/000095399/utilities/echo.html
dnl defines all backslash-sequences to be inherently non-portable asking
dnl for replacement mit printf. Some old systems had problems with that
dnl one either. However, the latest libtool (!) release does export an $ECHO
dnl (and $echo) that does the right thing - just one question is left: what
dnl was the first version to have it? Is it greater 2.58 ?