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-rw-r--r--Build/source/utils/xindy/configure.ac7
1 files changed, 5 insertions, 2 deletions
diff --git a/Build/source/utils/xindy/configure.ac b/Build/source/utils/xindy/configure.ac
index f7992467584..9799ae9af83 100644
--- a/Build/source/utils/xindy/configure.ac
+++ b/Build/source/utils/xindy/configure.ac
@@ -7,7 +7,7 @@
## Copyright (C) 2008 by Joachim Schrod.
##
## Adapted for TeX Live
-## Copyright (C) 2009 Peter Breitenlohner <tex-live@tug.org>
+## Copyright (C) 2009, 2010 Peter Breitenlohner <tex-live@tug.org>
##
## This program is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
@@ -140,7 +140,10 @@ AC_SUBST(LISP_RUN)
# Checks for header files.
AC_HEADER_STDC
-AC_CHECK_HEADERS([stdlib.h string.h regex.h],[],[AC_MSG_ERROR([required C header file is missing])])
+AC_CHECK_HEADERS([stdlib.h string.h regex.h],[],
+ [AS_IF([test "x$enable_build" != xno],
+ [AC_MSG_ERROR([required C header file is missing])],
+ [AC_MSG_WARN([required C header file is missing])])])
dnl check system type
AC_CANONICAL_HOST