-#serial 2
-dnl based on code from Eleftherios Gkioulekas
+#serial 7
+
+# Copyright (C) 1998-1999, 2001, 2004, 2008-2011 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
-AC_DEFUN(jm_ASSERT,
+dnl based on code from Eleftherios Gkioulekas
+dnl Autoconf 2.60 provides AC_HEADER_ASSERT for the same purpose, but
+dnl it has broken semantics for --enable-assert until 2.64.
+AC_DEFUN([gl_ASSERT],
[
- AC_MSG_CHECKING(whether to enable assertions)
- AC_ARG_ENABLE(assert,
- [ --disable-assert turn off assertions],
- [ AC_MSG_RESULT(no)
- AC_DEFINE(NDEBUG,1,[Define to 1 if assertions should be disabled.]) ],
- [ AC_MSG_RESULT(yes) ]
- )
+ AC_MSG_CHECKING([whether to enable assertions])
+ AC_ARG_ENABLE([assert],
+ [AS_HELP_STRING([--disable-assert], [turn off assertions])],
+ [AS_IF([test "x$enableval" = xno],
+ [AC_DEFINE([NDEBUG], [1],
+ [Define to 1 if assertions should be disabled.])],
+ [test "x$enableval" != xyes],
+ [AC_MSG_WARN([invalid argument supplied to --enable-assert])
+ enable_assert=yes])],
+ [enable_assert=yes])
+ AC_MSG_RESULT([$enable_assert])
])