tsearch test on mingw

[Bruno Haible]

On mingw, the test-tsearch program does not link, because this platform
does not have the 'initstate' function.

I don't want to spend time on random number generators at this point, so
here's a patch to make the test compile.

2008-04-20  Bruno Haible  <address@hidden>

        * tests/test-tsearch.c (main): Don't use initstate if it is missing.
        * modules/tsearch-tests (configure.ac): Test for initstate function.

*** modules/tsearch-tests.orig  2008-04-20 13:12:50.000000000 +0200
--- modules/tsearch-tests       2008-04-20 10:51:19.000000000 +0200
***************
*** 15,20 ****
--- 15,21 ----
     double x;],
    [x = log (x);], , [TEST_TSEARCH_LIBM=-lm])
  AC_SUBST([TEST_TSEARCH_LIBM])
+ AC_CHECK_FUNCS([initstate])
  
  Makefile.am:
  TESTS += test-tsearch.sh
*** tests/test-tsearch.c.orig   2008-04-20 13:12:50.000000000 +0200
--- tests/test-tsearch.c        2008-04-20 10:50:39.000000000 +0200
***************
*** 1,5 ****
  /* Test program for tsearch et al.
!    Copyright (C) 1997, 2000, 2001, 2007 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
  
     The GNU C Library is free software: you can redistribute it and/or
--- 1,5 ----
  /* Test program for tsearch et al.
!    Copyright (C) 1997, 2000-2001, 2007-2008 Free Software Foundation, Inc.
     This file is part of the GNU C Library.
  
     The GNU C Library is free software: you can redistribute it and/or
***************
*** 256,262 ****
--- 256,264 ----
    void *root = NULL;
    int i, j;
  
+ #if HAVE_INITSTATE
    initstate (SEED, state, 8);
+ #endif
  
    for (i = 0; i < SIZE; ++i)
      x[i] = i;