X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Finclude_next.m4;h=a842e2a23682bd0bea8a73ea22b58533c33ad97c;hb=48e27cbb6cc9e12006de6edfcafa69aafedadc85;hp=7ce472bc0a0b9b9d7a4c4c9ccca8b8a680e07eca;hpb=dd5848b18dd95feb771055453a473a73a6eb7cfb;p=gnulib.git

diff --git a/m4/include_next.m4 b/m4/include_next.m4
index 7ce472bc0..a842e2a23 100644
--- a/m4/include_next.m4
+++ b/m4/include_next.m4
@@ -1,5 +1,5 @@
-# include_next.m4 serial 4
-dnl Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+# include_next.m4 serial 6
+dnl Copyright (C) 2006-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -63,12 +63,15 @@ EOF
 # The three "///" are to pacify Sun C 5.8, which otherwise would say
 # "warning: #include of /usr/include/... may be non-portable".
 # Use `""', not `<>', so that the /// cannot be confused with a C99 comment.
+# Note: This macro assumes that the header file is not empty after
+# preprocessing, i.e. it does not only define preprocessor macros but also
+# provides some type/enum definitions or function/variable declarations.
 AC_DEFUN([gl_CHECK_NEXT_HEADERS],
 [
   AC_REQUIRE([gl_INCLUDE_NEXT])
   AC_CHECK_HEADERS_ONCE([$1])
 
-  AC_FOREACH([gl_HEADER_NAME], [$1],
+  m4_foreach_w([gl_HEADER_NAME], [$1],
     [AS_VAR_PUSHDEF([gl_next_header],
 		    [gl_cv_next_]m4_quote(m4_defn([gl_HEADER_NAME])))
      if test $gl_cv_have_include_next = yes; then