config/kernel-zlib.m4

   1 dnl #
   2 dnl # zlib inflate compat,
   3 dnl # Verify the kernel has CONFIG_ZLIB_INFLATE support enabled.
   4 dnl #
   5 AC_DEFUN([SPL_AC_CONFIG_ZLIB_INFLATE], [
   6         AC_MSG_CHECKING([whether CONFIG_ZLIB_INFLATE is defined])
   7         SPL_LINUX_TRY_COMPILE([
   8                 #if !defined(CONFIG_ZLIB_INFLATE) && \
   9                     !defined(CONFIG_ZLIB_INFLATE_MODULE)
  10                 #error CONFIG_ZLIB_INFLATE not defined
  11                 #endif
  12         ],[ ],[
  13                 AC_MSG_RESULT([yes])
  14         ],[
  15                 AC_MSG_RESULT([no])
  16                 AC_MSG_ERROR([
  17         *** This kernel does not include the required zlib inflate support.
  18         *** Rebuild the kernel with CONFIG_ZLIB_INFLATE=y|m set.])
  19         ])
  20 ])
  21
  22 dnl #
  23 dnl # zlib deflate compat,
  24 dnl # Verify the kernel has CONFIG_ZLIB_DEFLATE support enabled.
  25 dnl #
  26 AC_DEFUN([SPL_AC_CONFIG_ZLIB_DEFLATE], [
  27         AC_MSG_CHECKING([whether CONFIG_ZLIB_DEFLATE is defined])
  28         SPL_LINUX_TRY_COMPILE([
  29                 #if !defined(CONFIG_ZLIB_DEFLATE) && \
  30                     !defined(CONFIG_ZLIB_DEFLATE_MODULE)
  31                 #error CONFIG_ZLIB_DEFLATE not defined
  32                 #endif
  33         ],[ ],[
  34                 AC_MSG_RESULT([yes])
  35         ],[
  36                 AC_MSG_RESULT([no])
  37                 AC_MSG_ERROR([
  38         *** This kernel does not include the required zlib deflate support.
  39         *** Rebuild the kernel with CONFIG_ZLIB_DEFLATE=y|m set.])
  40         ])
  41 ])
  42
  43 dnl #
  44 dnl # 2.6.39 API compat,
  45 dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
  46 dnl # This was done to avoid always having to allocate the maximum size
  47 dnl # workspace (268K).  The caller can now specific the windowBits and
  48 dnl # memLevel compression parameters to get a smaller workspace.
  49 dnl #
  50 AC_DEFUN([SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE],
  51         [AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
  52         SPL_LINUX_TRY_COMPILE([
  53                 #include <linux/zlib.h>
  54         ],[
  55                 return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
  56         ],[
  57                 AC_MSG_RESULT(yes)
  58                 AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
  59                           [zlib_deflate_workspacesize() wants 2 args])
  60         ],[
  61                 AC_MSG_RESULT(no)
  62         ])
  63 ])