m4/glibc21.m4

   1 #serial 2
   2
   3 # Test for the GNU C Library, version 2.1 or newer.
   4 # From Bruno Haible.
   5
   6 AC_DEFUN([jm_GLIBC21],
   7   [
   8     AC_CACHE_CHECK(whether we are using the GNU C Library 2.1 or newer,
   9       ac_cv_gnu_library_2_1,
  10       [AC_EGREP_CPP([Lucky GNU user],
  11         [
  12 #include <features.h>
  13 #ifdef __GNU_LIBRARY__
  14  #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 1) || (__GLIBC__ > 2)
  15   Lucky GNU user
  16  #endif
  17 #endif
  18         ],
  19         ac_cv_gnu_library_2_1=yes,
  20         ac_cv_gnu_library_2_1=no)
  21       ]
  22     )
  23     AC_SUBST(GLIBC21)
  24     GLIBC21="$ac_cv_gnu_library_2_1"
  25   ]
  26 )