Split spl-build.m4

[mirror_spl.git] / config / kernel-zlib.m4

diff --git a/config/kernel-zlib.m4 b/config/kernel-zlib.m4
new file mode 100644 (file)
index 0000000..bb23646
--- /dev/null
+++ b/config/kernel-zlib.m4
@@ -0,0 +1,63 @@
+dnl #
+dnl # zlib inflate compat,
+dnl # Verify the kernel has CONFIG_ZLIB_INFLATE support enabled.
+dnl #
+AC_DEFUN([SPL_AC_CONFIG_ZLIB_INFLATE], [
+       AC_MSG_CHECKING([whether CONFIG_ZLIB_INFLATE is defined])
+       SPL_LINUX_TRY_COMPILE([
+               #if !defined(CONFIG_ZLIB_INFLATE) && \
+                   !defined(CONFIG_ZLIB_INFLATE_MODULE)
+               #error CONFIG_ZLIB_INFLATE not defined
+               #endif
+       ],[ ],[
+               AC_MSG_RESULT([yes])
+       ],[
+               AC_MSG_RESULT([no])
+               AC_MSG_ERROR([
+       *** This kernel does not include the required zlib inflate support.
+       *** Rebuild the kernel with CONFIG_ZLIB_INFLATE=y|m set.])
+       ])
+])
+
+dnl #
+dnl # zlib deflate compat,
+dnl # Verify the kernel has CONFIG_ZLIB_DEFLATE support enabled.
+dnl #
+AC_DEFUN([SPL_AC_CONFIG_ZLIB_DEFLATE], [
+       AC_MSG_CHECKING([whether CONFIG_ZLIB_DEFLATE is defined])
+       SPL_LINUX_TRY_COMPILE([
+               #if !defined(CONFIG_ZLIB_DEFLATE) && \
+                   !defined(CONFIG_ZLIB_DEFLATE_MODULE)
+               #error CONFIG_ZLIB_DEFLATE not defined
+               #endif
+       ],[ ],[
+               AC_MSG_RESULT([yes])
+       ],[
+               AC_MSG_RESULT([no])
+               AC_MSG_ERROR([
+       *** This kernel does not include the required zlib deflate support.
+       *** Rebuild the kernel with CONFIG_ZLIB_DEFLATE=y|m set.])
+       ])
+])
+
+dnl #
+dnl # 2.6.39 API compat,
+dnl # The function zlib_deflate_workspacesize() now take 2 arguments.
+dnl # This was done to avoid always having to allocate the maximum size
+dnl # workspace (268K).  The caller can now specific the windowBits and
+dnl # memLevel compression parameters to get a smaller workspace.
+dnl #
+AC_DEFUN([SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE],
+       [AC_MSG_CHECKING([whether zlib_deflate_workspacesize() wants 2 args])
+       SPL_LINUX_TRY_COMPILE([
+               #include <linux/zlib.h>
+       ],[
+               return zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL);
+       ],[
+               AC_MSG_RESULT(yes)
+               AC_DEFINE(HAVE_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE, 1,
+                         [zlib_deflate_workspacesize() wants 2 args])
+       ],[
+               AC_MSG_RESULT(no)
+       ])
+])