config/zlib.m4

   1 dnl A function to check if the system's zlib library should be used.  The
   2 dnl builtin zlib dnl is used by default unless the user configured with
   3 dnl --with-system-zlib.
   4
   5 AC_DEFUN([AM_ZLIB],
   6 [
   7   # Use the system's zlib library.
   8   zlibdir="-L\$(top_builddir)/../zlib"
   9   zlibinc="-I\$(top_srcdir)/../zlib"
  10   AC_ARG_WITH(system-zlib,
  11   [AS_HELP_STRING([--with-system-zlib], [use installed libz])],
  12   if test x$with_system_zlib = xyes ; then
  13     zlibdir=
  14     zlibinc=
  15   fi
  16   )
  17   AC_SUBST(zlibdir)
  18   AC_SUBST(zlibinc)
  19 ])