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Initial revision

    1: # glibc21.m4 serial 3
    2: dnl Copyright (C) 2000-2002, 2004 Free Software Foundation, Inc.
    3: dnl This file is free software; the Free Software Foundation
    4: dnl gives unlimited permission to copy and/or distribute it,
    5: dnl with or without modifications, as long as this notice is preserved.
    6: 
    7: # Test for the GNU C Library, version 2.1 or newer.
    8: # From Bruno Haible.
    9: 
   10: AC_DEFUN([gl_GLIBC21],
   11:   [
   12:     AC_CACHE_CHECK(whether we are using the GNU C Library 2.1 or newer,
   13:       ac_cv_gnu_library_2_1,
   14:       [AC_EGREP_CPP([Lucky GNU user],
   15: 	[
   16: #include <features.h>
   17: #ifdef __GNU_LIBRARY__
   18:  #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) || (__GLIBC__ > 2)
   19:   Lucky GNU user
   20:  #endif
   21: #endif
   22: 	],
   23: 	ac_cv_gnu_library_2_1=yes,
   24: 	ac_cv_gnu_library_2_1=no)
   25:       ]
   26:     )
   27:     AC_SUBST(GLIBC21)
   28:     GLIBC21="$ac_cv_gnu_library_2_1"
   29:   ]
   30: )