gentoo-overlay/mail-filter/opendkim/files/opendkim-2.7.2-strl.patch

--- configure.ac	2012-11-14 18:08:45.000000000 +0000
+++ configure.ac	2012-11-20 11:12:58.482147975 +0000
@@ -186,18 +186,22 @@
 libstrl_found="no"
 AC_CHECK_FUNCS([strlcat strlcpy], [strl_found="yes"],
                [
-		saved_LIBS="$LIBS"
-		LIBS=""
-		AC_SEARCH_LIBS([strlcat],
-		               [strl],
-		               [libstrl_found="yes"],
-		               [strl_found="no"])
-		AC_SEARCH_LIBS([strlcpy],
-		               [strl],
-		               [libstrl_found="yes"],
-		               [strl_found="no"])
-		STRL_LIBS="$LIBS"
-		LIBS="$saved_LIBS"
+	        AC_CHECK_HEADERS([strl.h],
+		    [
+		    saved_LIBS="$LIBS"
+		    LIBS=""
+		    AC_SEARCH_LIBS([strlcat],
+		                   [strl],
+		                   [libstrl_found="yes"],
+		                   [strl_found="no"])
+		    AC_SEARCH_LIBS([strlcpy],
+		                   [strl],
+		                   [libstrl_found="yes"],
+		                   [strl_found="no"])
+		    STRL_LIBS="$LIBS"
+		    LIBS="$saved_LIBS"
+		    ],
+		    [strl_found="no"])
                ])
 AM_CONDITIONAL([STRL],
                [test x"$strl_found" != x"yes" -a x"$libstrl_found" != x"yes"])