1 files changed, 112 insertions, 0 deletions
diff --git a/config/zfs-meta.m4 b/config/zfs-meta.m4
new file mode 100644
index 000000000..199638096
--- /dev/null
+++ b/config/zfs-meta.m4
@@ -0,0 +1,112 @@
+dnl #
+dnl # ZFS_AC_META
+dnl # Read metadata from the META file.
+dnl #
+dnl # AUTHOR:
+dnl # Chris Dunlap <[email protected]>
+dnl #
+AC_DEFUN([ZFS_AC_META], [
+	AC_MSG_CHECKING([metadata])
+
+	META="$srcdir/META"
+	_zfs_ac_meta_got_file=no
+	if test -f "$META"; then
+		_zfs_ac_meta_got_file=yes
+
+		META_NAME=_ZFS_AC_META_GETVAL([(?:NAME|PROJECT|PACKAGE)]);
+		if test -n "$META_NAME"; then
+			AC_DEFINE_UNQUOTED([META_NAME], ["$META_NAME"],
+				[Define the project name.]
+			)
+			AC_SUBST([META_NAME])
+		fi
+
+		META_VERSION=_ZFS_AC_META_GETVAL([VERSION]);
+		if test -n "$META_VERSION"; then
+			AC_DEFINE_UNQUOTED([META_VERSION], ["$META_VERSION"],
+				[Define the project version.]
+			)
+			AC_SUBST([META_VERSION])
+		fi
+
+		META_RELEASE=_ZFS_AC_META_GETVAL([RELEASE]);
+		if test -n "$META_RELEASE"; then
+			AC_DEFINE_UNQUOTED([META_RELEASE], ["$META_RELEASE"],
+				[Define the project release.]
+			)
+			AC_SUBST([META_RELEASE])
+		fi
+
+		if test -n "$META_NAME" -a -n "$META_VERSION"; then
+				META_ALIAS="$META_NAME-$META_VERSION"
+				test -n "$META_RELEASE" && 
+				        META_ALIAS="$META_ALIAS-$META_RELEASE"
+				AC_DEFINE_UNQUOTED([META_ALIAS],
+					["$META_ALIAS"],
+					[Define the project alias string.] 
+				)
+				AC_SUBST([META_ALIAS])
+		fi
+
+		META_DATE=_ZFS_AC_META_GETVAL([DATE]);
+		if test -n "$META_DATE"; then
+			AC_DEFINE_UNQUOTED([META_DATE], ["$META_DATE"],
+				[Define the project release date.] 
+			)
+			AC_SUBST([META_DATE])
+		fi
+
+		META_AUTHOR=_ZFS_AC_META_GETVAL([AUTHOR]);
+		if test -n "$META_AUTHOR"; then
+			AC_DEFINE_UNQUOTED([META_AUTHOR], ["$META_AUTHOR"],
+				[Define the project author.]
+			)
+			AC_SUBST([META_AUTHOR])
+		fi
+
+		m4_pattern_allow([^LT_(CURRENT|REVISION|AGE)$])
+		META_LT_CURRENT=_ZFS_AC_META_GETVAL([LT_CURRENT]);
+		META_LT_REVISION=_ZFS_AC_META_GETVAL([LT_REVISION]);
+		META_LT_AGE=_ZFS_AC_META_GETVAL([LT_AGE]);
+		if test -n "$META_LT_CURRENT" \
+				 -o -n "$META_LT_REVISION" \
+				 -o -n "$META_LT_AGE"; then
+			test -n "$META_LT_CURRENT" || META_LT_CURRENT="0"
+			test -n "$META_LT_REVISION" || META_LT_REVISION="0"
+			test -n "$META_LT_AGE" || META_LT_AGE="0"
+			AC_DEFINE_UNQUOTED([META_LT_CURRENT],
+				["$META_LT_CURRENT"],
+				[Define the libtool library 'current'
+				 version information.]
+			)
+			AC_DEFINE_UNQUOTED([META_LT_REVISION],
+				["$META_LT_REVISION"],
+				[Define the libtool library 'revision'
+				 version information.]
+			)
+			AC_DEFINE_UNQUOTED([META_LT_AGE], ["$META_LT_AGE"],
+				[Define the libtool library 'age' 
+				 version information.]
+			)
+			AC_SUBST([META_LT_CURRENT])
+			AC_SUBST([META_LT_REVISION])
+			AC_SUBST([META_LT_AGE])
+		fi
+	fi
+
+	AC_MSG_RESULT([$_zfs_ac_meta_got_file])
+	]
+)
+
+AC_DEFUN([_ZFS_AC_META_GETVAL], 
+	[`perl -n\
+		-e "BEGIN { \\$key=shift @ARGV; }"\
+		-e "next unless s/^\s*\\$key@<:@:=@:>@//i;"\
+		-e "s/^((?:@<:@^'\"#@:>@*(?:(@<:@'\"@:>@)@<:@^\2@:>@*\2)*)*)#.*/\\@S|@1/;"\
+		-e "s/^\s+//;"\
+		-e "s/\s+$//;"\
+		-e "s/^(@<:@'\"@:>@)(.*)\1/\\@S|@2/;"\
+		-e "\\$val=\\$_;"\
+		-e "END { print \\$val if defined \\$val; }"\
+		'$1' $META`]dnl
+)