184 lines
5.3 KiB
Plaintext
184 lines
5.3 KiB
Plaintext
dnl #
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dnl # Certain kernel build options are not supported. These must be
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dnl # detected at configure time and cause a build failure. Otherwise
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dnl # modules may be successfully built that behave incorrectly.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEFINED], [
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AS_IF([test "x$cross_compiling" != xyes], [
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AC_RUN_IFELSE([
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AC_LANG_PROGRAM([
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#include "$LINUX/include/linux/license.h"
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], [
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return !license_is_gpl_compatible(
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"$ZFS_META_LICENSE");
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])
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], [
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AC_DEFINE([ZFS_IS_GPL_COMPATIBLE], [1],
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[Define to 1 if GPL-only symbols can be used])
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], [
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])
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])
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ZFS_AC_KERNEL_SRC_CONFIG_THREAD_SIZE
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ZFS_AC_KERNEL_SRC_CONFIG_DEBUG_LOCK_ALLOC
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ZFS_AC_KERNEL_SRC_CONFIG_TRIM_UNUSED_KSYMS
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ZFS_AC_KERNEL_SRC_CONFIG_ZLIB_INFLATE
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ZFS_AC_KERNEL_SRC_CONFIG_ZLIB_DEFLATE
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AC_MSG_CHECKING([for kernel config option compatibility])
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ZFS_LINUX_TEST_COMPILE_ALL([config])
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AC_MSG_RESULT([done])
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ZFS_AC_KERNEL_CONFIG_THREAD_SIZE
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ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC
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ZFS_AC_KERNEL_CONFIG_TRIM_UNUSED_KSYMS
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ZFS_AC_KERNEL_CONFIG_ZLIB_INFLATE
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ZFS_AC_KERNEL_CONFIG_ZLIB_DEFLATE
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])
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dnl #
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dnl # Check configured THREAD_SIZE
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dnl #
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dnl # The stack size will vary by architecture, but as of Linux 3.15 on x86_64
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dnl # the default thread stack size was increased to 16K from 8K. Therefore,
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dnl # on newer kernels and some architectures stack usage optimizations can be
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dnl # conditionally applied to improve performance without negatively impacting
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dnl # stability.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_CONFIG_THREAD_SIZE], [
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ZFS_LINUX_TEST_SRC([config_thread_size], [
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#include <linux/module.h>
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],[
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#if (THREAD_SIZE < 16384)
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#error "THREAD_SIZE is less than 16K"
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#endif
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_CONFIG_THREAD_SIZE], [
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AC_MSG_CHECKING([whether kernel was built with 16K or larger stacks])
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ZFS_LINUX_TEST_RESULT([config_thread_size], [
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AC_MSG_RESULT([yes])
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AC_DEFINE(HAVE_LARGE_STACKS, 1, [kernel has large stacks])
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],[
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AC_MSG_RESULT([no])
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])
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])
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dnl #
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dnl # Check CONFIG_DEBUG_LOCK_ALLOC
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dnl #
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dnl # This is typically only set for debug kernels because it comes with
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dnl # a performance penalty. However, when it is set it maps the non-GPL
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dnl # symbol mutex_lock() to the GPL-only mutex_lock_nested() symbol.
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dnl # This will cause a failure at link time which we'd rather know about
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dnl # at compile time.
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dnl #
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dnl # Since we plan to pursue making mutex_lock_nested() a non-GPL symbol
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dnl # with the upstream community we add a check to detect this case.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_CONFIG_DEBUG_LOCK_ALLOC], [
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ZFS_LINUX_TEST_SRC([config_debug_lock_alloc], [
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#include <linux/mutex.h>
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],[
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struct mutex lock;
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mutex_init(&lock);
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mutex_lock(&lock);
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mutex_unlock(&lock);
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], [], [$ZFS_META_LICENSE])
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])
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AC_DEFUN([ZFS_AC_KERNEL_CONFIG_DEBUG_LOCK_ALLOC], [
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AC_MSG_CHECKING([whether mutex_lock() is GPL-only])
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ZFS_LINUX_TEST_RESULT([config_debug_lock_alloc], [
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AC_MSG_RESULT(no)
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],[
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AC_MSG_RESULT(yes)
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AC_MSG_ERROR([
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*** Kernel built with CONFIG_DEBUG_LOCK_ALLOC which is incompatible
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*** with the CDDL license and will prevent the module linking stage
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*** from succeeding. You must rebuild your kernel without this
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*** option enabled.])
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])
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])
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dnl #
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dnl # Check CONFIG_TRIM_UNUSED_KSYMS
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dnl #
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dnl # Verify the kernel has CONFIG_TRIM_UNUSED_KSYMS disabled.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_CONFIG_TRIM_UNUSED_KSYMS], [
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ZFS_LINUX_TEST_SRC([config_trim_unusued_ksyms], [
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#if defined(CONFIG_TRIM_UNUSED_KSYMS)
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#error CONFIG_TRIM_UNUSED_KSYMS not defined
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#endif
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],[])
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])
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AC_DEFUN([ZFS_AC_KERNEL_CONFIG_TRIM_UNUSED_KSYMS], [
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AC_MSG_CHECKING([whether CONFIG_TRIM_UNUSED_KSYM is disabled])
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ZFS_LINUX_TEST_RESULT([config_trim_unusued_ksyms], [
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AC_MSG_RESULT([yes])
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],[
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AC_MSG_RESULT([no])
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AS_IF([test "x$enable_linux_builtin" != xyes], [
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AC_MSG_ERROR([
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*** This kernel has unused symbols trimming enabled, please disable.
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*** Rebuild the kernel with CONFIG_TRIM_UNUSED_KSYMS=n set.])
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])
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])
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])
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dnl #
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dnl # Check CONFIG_ZLIB_INFLATE
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dnl #
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dnl # Verify the kernel has CONFIG_ZLIB_INFLATE support enabled.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_CONFIG_ZLIB_INFLATE], [
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ZFS_LINUX_TEST_SRC([config_zlib_inflate], [
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#if !defined(CONFIG_ZLIB_INFLATE) && \
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!defined(CONFIG_ZLIB_INFLATE_MODULE)
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#error CONFIG_ZLIB_INFLATE not defined
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#endif
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],[])
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])
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AC_DEFUN([ZFS_AC_KERNEL_CONFIG_ZLIB_INFLATE], [
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AC_MSG_CHECKING([whether CONFIG_ZLIB_INFLATE is defined])
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ZFS_LINUX_TEST_RESULT([config_zlib_inflate], [
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AC_MSG_RESULT([yes])
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],[
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AC_MSG_RESULT([no])
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AC_MSG_ERROR([
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*** This kernel does not include the required zlib inflate support.
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*** Rebuild the kernel with CONFIG_ZLIB_INFLATE=y|m set.])
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])
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])
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dnl #
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dnl # Check CONFIG_ZLIB_DEFLATE
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dnl #
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dnl # Verify the kernel has CONFIG_ZLIB_DEFLATE support enabled.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_SRC_CONFIG_ZLIB_DEFLATE], [
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ZFS_LINUX_TEST_SRC([config_zlib_deflate], [
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#if !defined(CONFIG_ZLIB_DEFLATE) && \
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!defined(CONFIG_ZLIB_DEFLATE_MODULE)
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#error CONFIG_ZLIB_DEFLATE not defined
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#endif
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],[])
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])
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AC_DEFUN([ZFS_AC_KERNEL_CONFIG_ZLIB_DEFLATE], [
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AC_MSG_CHECKING([whether CONFIG_ZLIB_DEFLATE is defined])
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ZFS_LINUX_TEST_RESULT([config_zlib_deflate], [
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AC_MSG_RESULT([yes])
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],[
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AC_MSG_RESULT([no])
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AC_MSG_ERROR([
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*** This kernel does not include the required zlib deflate support.
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*** Rebuild the kernel with CONFIG_ZLIB_DEFLATE=y|m set.])
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])
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])
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