Fix docs and build system.

configure.ac

@@ -6,7 +6,7 @@ AC_PROG_RANLIB
 AM_PROG_CC_C_O
 
 AC_CHECK_HEADER(openssl/ssl.h, [], [AC_MSG_ERROR([couldn't find openssl headers, openssl required])])
-PKG_CHECK_MODULES([check], [check >= 0.9.4])
+PKG_CHECK_MODULES([check], [check >= 0.9.4], [], [AC_MSG_WARN([libcheck not found; unit tests will not be compilable])])
 
 AC_ARG_WITH([libxml2], 
             [AS_HELP_STRING([--with-libxml2], [use libxml2 for XML parsing])],
@@ -18,8 +18,7 @@ if test "x$with_libxml2" != xno; then
                     [with_libxml2=yes], 
                     [AC_MSG_ERROR([couldn't find libxml2])])
 else
-  AC_CHECK_FUNCS(memmove)
-  AC_C_BIGENDIAN([byteorder=1234], [byteorder=4321], [], [])
+  AC_CHECK_HEADER(expat.h, [], [AC_MSG_ERROR([couldn't find expat headers; expat required])])
 fi
 
 if test "x$with_libxml2" = xyes; then
@@ -28,18 +27,16 @@ if test "x$with_libxml2" = xyes; then
   PARSER_CFLAGS=\$\(libxml2_CFLAGS\)
   PARSER_LIBS=\$\(libxml2_LIBS\)
 else
-  with_parser=builtin
+  with_parser=expat
   PARSER_NAME=expat
-  PARSER_CFLAGS=\$\(builtin_CFLAGS\)
-  PARSER_LIBS=\$\(builtin_LIBS\)
+  PARSER_CFLAGS=
+  PARSER_LIBS=-lexpat
 fi
 
 AC_MSG_NOTICE([libstrophe will use the $with_parser XML parser])
 AC_SEARCH_LIBS([socket], [socket])
 
-AM_CONDITIONAL([BUILD_EXPAT], [test x$with_parser = xbuiltin])
 AM_CONDITIONAL([PARSER_EXPAT], [test x$with_parser != xlibxml2])
-AC_DEFINE_UNQUOTED([BYTEORDER], [$byteorder])
 AC_SUBST(PARSER_NAME)                              
 AC_SUBST(PARSER_CFLAGS)
 AC_SUBST(PARSER_LIBS)