[mirror_spl.git] / autoconf / spl-build.m4

AC_DEFUN([SPL_AC_KERNEL], [
	ver=`uname -r`

	AC_ARG_WITH([linux],
		AS_HELP_STRING([--with-linux=PATH],
		[Path to kernel source]),
		[kernelsrc="$withval"; kernelbuild="$withval"])

	AC_ARG_WITH([linux-obj],
		AS_HELP_STRING([--with-linux-obj=PATH],
		[Path to kernel build objects]),
		[kernelbuild="$withval"])

	AC_MSG_CHECKING([kernel source directory])
	if test -z "$kernelsrc"; then
		kernelbuild=
		sourcelink=/lib/modules/${ver}/source
		buildlink=/lib/modules/${ver}/build

		if test -e $sourcelink; then
			kernelsrc=`(cd $sourcelink; /bin/pwd)`
		fi
		if test -e $buildlink; then
			kernelbuild=`(cd $buildlink; /bin/pwd)`
		fi
		if test -z "$kernelsrc"; then
			kernelsrc=$kernelbuild
		fi
		if test -z "$kernelsrc" -o -z "$kernelbuild"; then
			AC_MSG_RESULT([Not found])
			AC_MSG_ERROR([
			*** Please specify the location of the kernel source
			*** with the '--with-kernel=PATH' option])
		fi
	fi

	AC_MSG_RESULT([$kernelsrc])
	AC_MSG_CHECKING([kernel build directory])
	AC_MSG_RESULT([$kernelbuild])

	AC_MSG_CHECKING([kernel source version])
	if test -r $kernelbuild/include/linux/version.h && 
		fgrep -q UTS_RELEASE $kernelbuild/include/linux/version.h; then

		kernsrcver=`(echo "#include <linux/version.h>"; 
		             echo "kernsrcver=UTS_RELEASE") | 
	        	     cpp -I $kernelbuild/include |
		             grep "^kernsrcver=" | cut -d \" -f 2`

	elif test -r $kernelbuild/include/linux/utsrelease.h && 
		fgrep -q UTS_RELEASE $kernelbuild/include/linux/utsrelease.h; then

		kernsrcver=`(echo "#include <linux/utsrelease.h>"; 
		             echo "kernsrcver=UTS_RELEASE") | 
	        	     cpp -I $kernelbuild/include |
		             grep "^kernsrcver=" | cut -d \" -f 2`
	fi

	if test -z "$kernsrcver"; then
		AC_MSG_RESULT([Not found])
		AC_MSG_ERROR([
		*** Cannot determine the version of the linux kernel source.
		*** Please prepare the kernel before running this script])
	fi

	AC_MSG_RESULT([$kernsrcver])

	kmoduledir=${INSTALL_MOD_PATH}/lib/modules/$kernsrcver
	LINUX=${kernelsrc}
	LINUX_OBJ=${kernelbuild}

	AC_SUBST(LINUX)
	AC_SUBST(LINUX_OBJ)
	AC_SUBST(kmoduledir)
])

AC_DEFUN([SPL_AC_DEBUG], [
	AC_MSG_CHECKING([whether debugging is enabled])
	AC_ARG_ENABLE( [debug],
		AS_HELP_STRING([--enable-debug],
		[Enable generic debug support (default off)]),
		[ case "$enableval" in
			yes) spl_ac_debug=yes ;;
			no)  spl_ac_debug=no  ;;
			*) AC_MSG_RESULT([Error!])
			AC_MSG_ERROR([Bad value "$enableval" for --enable-debug]) ;;
		esac ]
	) 
	if test "$spl_ac_debug" = yes; then
		AC_MSG_RESULT([yes])
		KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG"
	else
		AC_MSG_RESULT([no])
		AC_DEFINE([NDEBUG], [1],
		[Define to 1 to disable debug tracing])
		KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
	fi
])

AC_DEFUN([SPL_AC_DEBUG_KMEM], [
	AC_MSG_CHECKING([whether kmem debugging is enabled])
	AC_ARG_ENABLE( [debug-kmem],
		AS_HELP_STRING([--enable-debug-kmem],
		[Enable kmem debug support (default off)]),
		[ case "$enableval" in
			yes) spl_ac_debug_kmem=yes ;;
			no)  spl_ac_debug_kmem=no  ;;
			*) AC_MSG_RESULT([Error!])
			AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-kmem]) ;;
		esac ]
	) 
	if test "$spl_ac_debug_kmem" = yes; then
		AC_MSG_RESULT([yes])
		AC_DEFINE([DEBUG_KMEM], [1],
		[Define to 1 to enable kmem debugging])
		KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
	else
		AC_MSG_RESULT([no])
	fi
])

AC_DEFUN([SPL_AC_DEBUG_MUTEX], [
	AC_MSG_CHECKING([whether mutex debugging is enabled])
	AC_ARG_ENABLE( [debug-mutex],
		AS_HELP_STRING([--enable-debug-mutex],
		[Enable mutex debug support (default off)]),
		[ case "$enableval" in
			yes) spl_ac_debug_mutex=yes ;;
			no)  spl_ac_debug_mutex=no  ;;
			*) AC_MSG_RESULT([Error!])
			AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-mutex]) ;;
		esac ]
	) 
	if test "$spl_ac_debug_mutex" = yes; then
		AC_MSG_RESULT([yes])
		AC_DEFINE([DEBUG_MUTEX], [1],
		[Define to 1 to enable mutex debugging])
		KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_MUTEX"
	else
		AC_MSG_RESULT([no])
	fi
])

AC_DEFUN([SPL_AC_DEBUG_KSTAT], [
	AC_MSG_CHECKING([whether kstat debugging is enabled])
	AC_ARG_ENABLE( [debug-kstat],
		AS_HELP_STRING([--enable-debug-kstat],
		[Enable kstat debug support (default off)]),
		[ case "$enableval" in
			yes) spl_ac_debug_kstat=yes ;;
			no)  spl_ac_debug_kstat=no  ;;
			*) AC_MSG_RESULT([Error!])
			AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-kstat]) ;;
		esac ]
	) 
	if test "$spl_ac_debug_kstat" = yes; then
		AC_MSG_RESULT([yes])
		AC_DEFINE([DEBUG_KSTAT], [1],
		[Define to 1 to enable kstat debugging])
		KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KSTAT"
	else
		AC_MSG_RESULT([no])
	fi
])

AC_DEFUN([SPL_AC_DEBUG_CALLB], [
	AC_MSG_CHECKING([whether callb debugging is enabled])
	AC_ARG_ENABLE( [debug-callb],
		AS_HELP_STRING([--enable-debug-callb],
		[Enable callb debug support (default off)]),
		[ case "$enableval" in
			yes) spl_ac_debug_callb=yes ;;
			no)  spl_ac_debug_callb=no  ;;
			*) AC_MSG_RESULT([Error!])
			AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-callb]) ;;
		esac ]
	) 
	if test "$spl_ac_debug_callb" = yes; then
		AC_MSG_RESULT([yes])
		AC_DEFINE([DEBUG_CALLB], [1],
		[Define to 1 to enable callb debugging])
		KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_CALLB"
	else
		AC_MSG_RESULT([no])
	fi
])

dnl #
dnl # SPL_LINUX_CONFTEST
dnl #
AC_DEFUN([SPL_LINUX_CONFTEST], [
cat >conftest.c <<_ACEOF
$1
_ACEOF
])

dnl #
dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
dnl #
m4_define([SPL_LANG_PROGRAM], [
$1
int
main (void)
{
dnl Do *not* indent the following line: there may be CPP directives.
dnl Don't move the `;' right after for the same reason.
$2
  ;
  return 0;
}
])

dnl #
dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
dnl #
AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])dnl
rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
echo "obj-m := conftest.o" >build/Makefile
dnl AS_IF([AC_TRY_COMMAND(cp conftest.c build && make [$2] CC="$CC" -f $PWD/build/Makefile LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM SUBDIRS=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
AS_IF([AC_TRY_COMMAND(cp conftest.c build && make [$2] CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
        [$4],
        [_AC_MSG_LOG_CONFTEST
m4_ifvaln([$5],[$5])dnl])dnl
rm -f build/conftest.o build/conftest.mod.c build/conftest.mod.o build/conftest.ko m4_ifval([$1], [build/conftest.c conftest.c])[]dnl
])

dnl #
dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
dnl #
AC_DEFUN([SPL_LINUX_TRY_COMPILE],
	[SPL_LINUX_COMPILE_IFELSE(
	[AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
	[modules],
	[test -s build/conftest.o],
	[$3], [$4])
])

dnl #
dnl # SPL_LINUX_CONFIG
dnl #
AC_DEFUN([SPL_LINUX_CONFIG],
	[AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
	SPL_LINUX_TRY_COMPILE([
		#ifndef AUTOCONF_INCLUDED
		#include <linux/config.h>
		#endif
	],[
		#ifndef CONFIG_$1
		#error CONFIG_$1 not #defined
		#endif
	],[
		AC_MSG_RESULT([yes])
		$2
	],[
		AC_MSG_RESULT([no])
		$3
	])
])

dnl #
dnl # SPL_CHECK_SYMBOL_EXPORT
dnl # check symbol exported or not
dnl #
AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT],
	[AC_MSG_CHECKING([whether symbol $1 is exported])
	grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/Module.symvers 2>/dev/null
	rc=$?
	if test $rc -ne 0; then
		export=0
		for file in $2; do
			grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null
			rc=$?
		        if test $rc -eq 0; then
		                export=1
		                break;
		        fi
		done
		if test $export -eq 0; then
			AC_MSG_RESULT([no])
			$4
		else
			AC_MSG_RESULT([yes])
			$3
		fi
	else
		AC_MSG_RESULT([yes])
		$3
	fi
])

dnl #
dnl # SPL_CHECK_HEADER
dnl # check whether header exists and define HAVE_$2_HEADER
dnl #
AC_DEFUN([SPL_CHECK_HEADER],
	[AC_MSG_CHECKING([whether header $1 exists])
	SPL_LINUX_TRY_COMPILE([
		#include <$1>
	],[
		return 0;
	],[
		AC_DEFINE(HAVE_$2_HEADER, 1, [$1 exists])
		AC_MSG_RESULT(yes)
		$3
	],[
		AC_MSG_RESULT(no)
		$4
	])
])

dnl #
dnl # 2.6.24 API change,
dnl # check if uintptr_t typedef is defined
dnl #
AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
	[AC_MSG_CHECKING([whether kernel defines uintptr_t])
	SPL_LINUX_TRY_COMPILE([
		#include <linux/types.h>
	],[
		uintptr_t *ptr;
	],[
		AC_MSG_RESULT([yes])
		AC_DEFINE(HAVE_UINTPTR_T, 1,
		          [kernel defines uintptr_t])
	],[
		AC_MSG_RESULT([no])
	])
])

dnl #
dnl # 2.6.20 API change,
dnl # INIT_WORK use 2 args and not store data inside
dnl #
AC_DEFUN([SPL_AC_3ARGS_INIT_WORK],
	[AC_MSG_CHECKING([whether INIT_WORK wants 3 args])
	SPL_LINUX_TRY_COMPILE([
		#include <linux/workqueue.h>
	],[
		struct work_struct work;
		INIT_WORK(&work, NULL, NULL);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_3ARGS_INIT_WORK, 1,
		          [INIT_WORK wants 3 args])
	],[
		AC_MSG_RESULT(no)
	])
])

dnl #
dnl # 2.6.21 API change,
dnl # 'register_sysctl_table' use only one argument instead of two
dnl #
AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL],
	[AC_MSG_CHECKING([whether register_sysctl_table() wants 2 args])
	SPL_LINUX_TRY_COMPILE([
		#include <linux/sysctl.h>
	],[
		return register_sysctl_table(NULL,0);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
		          [register_sysctl_table() wants 2 args])
	],[
		AC_MSG_RESULT(no)
	])
])

dnl #
dnl # 2.6.23 API change
dnl # Old set_shrinker API replaced with register_shrinker
dnl #
AC_DEFUN([SPL_AC_SET_SHRINKER], [
	AC_MSG_CHECKING([whether set_shrinker() available])
	SPL_LINUX_TRY_COMPILE([
		#include <linux/mm.h>
	],[
		return set_shrinker(DEFAULT_SEEKS, NULL);
	],[
		AC_MSG_RESULT([yes])
		AC_DEFINE(HAVE_SET_SHRINKER, 1,
		          [set_shrinker() available])
	],[
		AC_MSG_RESULT([no])
	])
])

dnl #
dnl # 2.6.25 API change,
dnl # struct path entry added to struct nameidata
dnl #
AC_DEFUN([SPL_AC_PATH_IN_NAMEIDATA],
	[AC_MSG_CHECKING([whether struct path used in struct nameidata])
	SPL_LINUX_TRY_COMPILE([
		#include <linux/namei.h>
	],[
		struct nameidata nd;

		nd.path.mnt = NULL;
		nd.path.dentry = NULL;
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_PATH_IN_NAMEIDATA, 1,
		          [struct path used in struct nameidata])
	],[
		AC_MSG_RESULT(no)
	])
])

dnl #
dnl # Custom SPL patch may export this system it is not required
dnl #
AC_DEFUN([SPL_AC_TASK_CURR], [
	SPL_CHECK_SYMBOL_EXPORT([task_curr], [kernel/sched.c],
		[AC_DEFINE(HAVE_TASK_CURR, 1, [task_curr() exported])],
		[])
])

dnl #
dnl # 2.6.19 API change,
dnl # Use CTL_UNNUMBERED when binary sysctl is not required
dnl #
AC_DEFUN([SPL_AC_CTL_UNNUMBERED],
	[AC_MSG_CHECKING([whether unnumbered sysctl support exists])
	SPL_LINUX_TRY_COMPILE([
		#include <linux/sysctl.h>
	],[
		#ifndef CTL_UNNUMBERED
		#error CTL_UNNUMBERED undefined
		#endif
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_CTL_UNNUMBERED, 1,
		          [unnumbered sysctl support exists])
	],[
		AC_MSG_RESULT(no)
	])
])

dnl #
dnl # 2.6.16 API change.
dnl # Check if 'fls64()' is available
dnl #
AC_DEFUN([SPL_AC_FLS64],
	[AC_MSG_CHECKING([whether fls64() is available])
	SPL_LINUX_TRY_COMPILE([
		#include <linux/bitops.h>
	],[
		return fls64(0);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_FLS64, 1, [fls64() is available])
	],[
		AC_MSG_RESULT(no)
	])
])

dnl #
dnl # 2.6.18 API change, check whether device_create() is available.
dnl # Device_create() was introduced in 2.6.18 and depricated 
dnl # class_device_create() which was fully removed in 2.6.26.
dnl #
AC_DEFUN([SPL_AC_DEVICE_CREATE], [
	SPL_CHECK_SYMBOL_EXPORT(
		[device_create],
		[drivers/base/core.c],
		[AC_DEFINE(HAVE_DEVICE_CREATE, 1,
		[device_create() is available])],
		[])
])

dnl #
dnl # 2.6.13 API change, check whether class_device_create() is available.
dnl # Class_device_create() was introduced in 2.6.13 and depricated
dnl # class_simple_device_add() which was fully removed in 2.6.13.
dnl #
AC_DEFUN([SPL_AC_CLASS_DEVICE_CREATE], [
	SPL_CHECK_SYMBOL_EXPORT(
		[class_device_create],
		[drivers/base/class.c],
		[AC_DEFINE(HAVE_CLASS_DEVICE_CREATE, 1,
		[class_device_create() is available])],
		[])
])

dnl #
dnl # 2.6.26 API change, set_normalized_timespec() is exported.
dnl #
AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT], [
	SPL_CHECK_SYMBOL_EXPORT(
		[set_normalized_timespec],
		[kernel/time.c],
		[AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT, 1,
		[set_normalized_timespec() is available as export])],
		[])
])

dnl #
dnl # 2.6.16 API change, set_normalize_timespec() moved to time.c
dnl # previously it was available in time.h as an inline.
dnl #
AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE], [
	AC_MSG_CHECKING([whether set_normalized_timespec() is an inline])
	SPL_LINUX_TRY_COMPILE([
		#include <linux/time.h>
		void set_normalized_timespec(struct timespec *ts,
		                             time_t sec, long nsec) { }
	],
	[],
	[
		AC_MSG_RESULT(no)
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_INLINE, 1,
		          [set_normalized_timespec() is available as inline])
	])
])

dnl #
dnl # 2.6.18 API change,
dnl # timespec_sub() inline function available in linux/time.h
dnl #
AC_DEFUN([SPL_AC_TIMESPEC_SUB], [
	AC_MSG_CHECKING([whether timespec_sub() is available])
	SPL_LINUX_TRY_COMPILE([
		#include <linux/time.h>
	],[
		struct timespec a, b, c = { 0 };
		c = timespec_sub(a, b);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_TIMESPEC_SUB, 1, [timespec_sub() is available])
	],[
		AC_MSG_RESULT(no)
	])
])

dnl #
dnl # 2.6.19 API change,
dnl # check if init_utsname() is available in linux/utsname.h
dnl #
AC_DEFUN([SPL_AC_INIT_UTSNAME], [
	AC_MSG_CHECKING([whether init_utsname() is available])
	SPL_LINUX_TRY_COMPILE([
		#include <linux/utsname.h>
	],[
		struct new_utsname *a = init_utsname();
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_INIT_UTSNAME, 1, [init_utsname() is available])
	],[
		AC_MSG_RESULT(no)
	])
])

dnl #
dnl # 2.6.26 API change,
dnl # definition of struct fdtable relocated to linux/fdtable.h
dnl #
AC_DEFUN([SPL_AC_FDTABLE_HEADER], [
	SPL_CHECK_HEADER([linux/fdtable.h], [FDTABLE], [], [])
])

dnl #
dnl # 2.6.14 API change,
dnl # check whether 'files_fdtable()' exists
dnl #
AC_DEFUN([SPL_AC_FILES_FDTABLE], [
	AC_MSG_CHECKING([whether files_fdtable() is available])
	SPL_LINUX_TRY_COMPILE([
		#include <linux/sched.h>
		#include <linux/file.h>
		#ifdef HAVE_FDTABLE_HEADER
		#include <linux/fdtable.h>
		#endif
	],[
		struct files_struct *files = current->files;
		struct fdtable *fdt = files_fdtable(files);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_FILES_FDTABLE, 1, [files_fdtable() is available])
	],[
		AC_MSG_RESULT(no)
	])
])

dnl #
dnl # 2.6.18 API change,
dnl # added linux/uaccess.h
dnl #
AC_DEFUN([SPL_AC_UACCESS_HEADER], [
	SPL_CHECK_HEADER([linux/uaccess.h], [UACCESS], [], [])
])

dnl #
dnl # 2.6.12 API change,
dnl # check whether 'kmalloc_node()' is available.
dnl #
AC_DEFUN([SPL_AC_KMALLOC_NODE], [
	AC_MSG_CHECKING([whether kmalloc_node() is available])
	SPL_LINUX_TRY_COMPILE([
		#include <linux/slab.h>
	],[
		void *a = kmalloc_node(1, GFP_KERNEL, 0);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_KMALLOC_NODE, 1, [kmalloc_node() is available])
	],[
		AC_MSG_RESULT(no)
	])
])

dnl #
dnl # 2.6.9 API change,
dnl # check whether 'monotonic_clock()' is available it may
dnl # be available for some archs but not others.
dnl #
AC_DEFUN([SPL_AC_MONOTONIC_CLOCK], [
	SPL_CHECK_SYMBOL_EXPORT(
		[monotonic_clock],
		[],
		[AC_DEFINE(HAVE_MONOTONIC_CLOCK, 1,
		[monotonic_clock() is available])],
		[])
])

dnl #
dnl # 2.6.16 API change,
dnl # check whether 'struct inode' has i_mutex
dnl #
AC_DEFUN([SPL_AC_INODE_I_MUTEX], [
	AC_MSG_CHECKING([whether struct inode has i_mutex])
	SPL_LINUX_TRY_COMPILE([
		#include <linux/fs.h>
		#include <linux/mutex.h>
	],[
		struct inode i;
		mutex_init(&i.i_mutex);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_INODE_I_MUTEX, 1, [struct inode has i_mutex])
	],[
		AC_MSG_RESULT(no)
	])
])

dnl #
dnl # 2.6.14 API change,
dnl # check whether 'div64_64()' is available
dnl #
AC_DEFUN([SPL_AC_DIV64_64], [
	AC_MSG_CHECKING([whether div64_64() is available])
	SPL_LINUX_TRY_COMPILE([
		#include <asm/div64.h>
		#include <linux/types.h>
	],[
		uint64_t i = div64_64(1ULL, 1ULL);
	],[
		AC_MSG_RESULT(yes)
		AC_DEFINE(HAVE_DIV64_64, 1, [div64_64() is available])
	],[
		AC_MSG_RESULT(no)
	])
])
Commit	Line	Data
57d86234	1	AC_DEFUN([SPL_AC_KERNEL], [
	2	ver=`uname -r`
	3
	4	AC_ARG_WITH([linux],
	5	AS_HELP_STRING([--with-linux=PATH],
	6	[Path to kernel source]),
	7	[kernelsrc="$withval"; kernelbuild="$withval"])
	8
	9	AC_ARG_WITH([linux-obj],
	10	AS_HELP_STRING([--with-linux-obj=PATH],
	11	[Path to kernel build objects]),
	12	[kernelbuild="$withval"])
	13
	14	AC_MSG_CHECKING([kernel source directory])
	15	if test -z "$kernelsrc"; then
	16	kernelbuild=
	17	sourcelink=/lib/modules/${ver}/source
	18	buildlink=/lib/modules/${ver}/build
	19
	20	if test -e $sourcelink; then
	21	kernelsrc=`(cd $sourcelink; /bin/pwd)`
	22	fi
	23	if test -e $buildlink; then
	24	kernelbuild=`(cd $buildlink; /bin/pwd)`
	25	fi
	26	if test -z "$kernelsrc"; then
	27	kernelsrc=$kernelbuild
	28	fi
	29	if test -z "$kernelsrc" -o -z "$kernelbuild"; then
	30	AC_MSG_RESULT([Not found])
	31	AC_MSG_ERROR([
	32	*** Please specify the location of the kernel source
	33	*** with the '--with-kernel=PATH' option])
	34	fi
	35	fi
	36
	37	AC_MSG_RESULT([$kernelsrc])
	38	AC_MSG_CHECKING([kernel build directory])
	39	AC_MSG_RESULT([$kernelbuild])
	40
	41	AC_MSG_CHECKING([kernel source version])
	42	if test -r $kernelbuild/include/linux/version.h &&
	43	fgrep -q UTS_RELEASE $kernelbuild/include/linux/version.h; then
	44
	45	kernsrcver=`(echo "#include <linux/version.h>";
	46	echo "kernsrcver=UTS_RELEASE") \|
	47	cpp -I $kernelbuild/include \|
	48	grep "^kernsrcver=" \| cut -d \" -f 2`
	49
	50	elif test -r $kernelbuild/include/linux/utsrelease.h &&
	51	fgrep -q UTS_RELEASE $kernelbuild/include/linux/utsrelease.h; then
	52
	53	kernsrcver=`(echo "#include <linux/utsrelease.h>";
	54	echo "kernsrcver=UTS_RELEASE") \|
	55	cpp -I $kernelbuild/include \|
	56	grep "^kernsrcver=" \| cut -d \" -f 2`
	57	fi
	58
	59	if test -z "$kernsrcver"; then
	60	AC_MSG_RESULT([Not found])
	61	AC_MSG_ERROR([
	62	*** Cannot determine the version of the linux kernel source.
	63	*** Please prepare the kernel before running this script])
	64	fi
65
66	AC_MSG_RESULT([$kernsrcver])
67
68	kmoduledir=${INSTALL_MOD_PATH}/lib/modules/$kernsrcver
69	LINUX=${kernelsrc}
70	LINUX_OBJ=${kernelbuild}
71
72	AC_SUBST(LINUX)
73	AC_SUBST(LINUX_OBJ)
74	AC_SUBST(kmoduledir)
75	])
76
77	AC_DEFUN([SPL_AC_DEBUG], [
78	AC_MSG_CHECKING([whether debugging is enabled])
79	AC_ARG_ENABLE( [debug],
80	AS_HELP_STRING([--enable-debug],
81	[Enable generic debug support (default off)]),
82	[ case "$enableval" in
83	yes) spl_ac_debug=yes ;;
475cdc78	84	no) spl_ac_debug=no ;;
57d86234	85	*) AC_MSG_RESULT([Error!])
	86	AC_MSG_ERROR([Bad value "$enableval" for --enable-debug]) ;;
	87	esac ]
	88	)
	89	if test "$spl_ac_debug" = yes; then
475cdc78	90	AC_MSG_RESULT([yes])
57d86234	91	KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG"
57d86234	92	else
475cdc78	93	AC_MSG_RESULT([no])
57d86234	94	AC_DEFINE([NDEBUG], [1],
57d86234	95	[Define to 1 to disable debug tracing])
475cdc78	96	KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
57d86234	97	fi
57d86234	98	])
	99
	100	AC_DEFUN([SPL_AC_DEBUG_KMEM], [
	101	AC_MSG_CHECKING([whether kmem debugging is enabled])
	102	AC_ARG_ENABLE( [debug-kmem],
	103	AS_HELP_STRING([--enable-debug-kmem],
	104	[Enable kmem debug support (default off)]),
	105	[ case "$enableval" in
475cdc78	106	yes) spl_ac_debug_kmem=yes ;;
475cdc78	107	no) spl_ac_debug_kmem=no ;;
57d86234	108	*) AC_MSG_RESULT([Error!])
	109	AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-kmem]) ;;
	110	esac ]
	111	)
475cdc78	112	if test "$spl_ac_debug_kmem" = yes; then
475cdc78	113	AC_MSG_RESULT([yes])
57d86234	114	AC_DEFINE([DEBUG_KMEM], [1],
57d86234	115	[Define to 1 to enable kmem debugging])
475cdc78	116	KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
	117	else
	118	AC_MSG_RESULT([no])
57d86234	119	fi
57d86234	120	])
	121
	122	AC_DEFUN([SPL_AC_DEBUG_MUTEX], [
	123	AC_MSG_CHECKING([whether mutex debugging is enabled])
	124	AC_ARG_ENABLE( [debug-mutex],
	125	AS_HELP_STRING([--enable-debug-mutex],
	126	[Enable mutex debug support (default off)]),
	127	[ case "$enableval" in
475cdc78	128	yes) spl_ac_debug_mutex=yes ;;
475cdc78	129	no) spl_ac_debug_mutex=no ;;
57d86234	130	*) AC_MSG_RESULT([Error!])
	131	AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-mutex]) ;;
	132	esac ]
	133	)
475cdc78	134	if test "$spl_ac_debug_mutex" = yes; then
475cdc78	135	AC_MSG_RESULT([yes])
57d86234	136	AC_DEFINE([DEBUG_MUTEX], [1],
57d86234	137	[Define to 1 to enable mutex debugging])
475cdc78	138	KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_MUTEX"
	139	else
	140	AC_MSG_RESULT([no])
57d86234	141	fi
57d86234	142	])
	143
	144	AC_DEFUN([SPL_AC_DEBUG_KSTAT], [
	145	AC_MSG_CHECKING([whether kstat debugging is enabled])
	146	AC_ARG_ENABLE( [debug-kstat],
	147	AS_HELP_STRING([--enable-debug-kstat],
	148	[Enable kstat debug support (default off)]),
	149	[ case "$enableval" in
475cdc78	150	yes) spl_ac_debug_kstat=yes ;;
475cdc78	151	no) spl_ac_debug_kstat=no ;;
57d86234	152	*) AC_MSG_RESULT([Error!])
	153	AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-kstat]) ;;
	154	esac ]
	155	)
475cdc78	156	if test "$spl_ac_debug_kstat" = yes; then
475cdc78	157	AC_MSG_RESULT([yes])
57d86234	158	AC_DEFINE([DEBUG_KSTAT], [1],
57d86234	159	[Define to 1 to enable kstat debugging])
475cdc78	160	KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KSTAT"
	161	else
	162	AC_MSG_RESULT([no])
57d86234	163	fi
57d86234	164	])
	165
	166	AC_DEFUN([SPL_AC_DEBUG_CALLB], [
	167	AC_MSG_CHECKING([whether callb debugging is enabled])
	168	AC_ARG_ENABLE( [debug-callb],
	169	AS_HELP_STRING([--enable-debug-callb],
	170	[Enable callb debug support (default off)]),
	171	[ case "$enableval" in
475cdc78	172	yes) spl_ac_debug_callb=yes ;;
475cdc78	173	no) spl_ac_debug_callb=no ;;
57d86234	174	*) AC_MSG_RESULT([Error!])
	175	AC_MSG_ERROR([Bad value "$enableval" for --enable-debug-callb]) ;;
	176	esac ]
	177	)
475cdc78	178	if test "$spl_ac_debug_callb" = yes; then
475cdc78	179	AC_MSG_RESULT([yes])
57d86234	180	AC_DEFINE([DEBUG_CALLB], [1],
57d86234	181	[Define to 1 to enable callb debugging])
475cdc78	182	KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_CALLB"
	183	else
	184	AC_MSG_RESULT([no])
57d86234	185	fi
57d86234	186	])
	187
	188	dnl #
	189	dnl # SPL_LINUX_CONFTEST
	190	dnl #
	191	AC_DEFUN([SPL_LINUX_CONFTEST], [
	192	cat >conftest.c <<_ACEOF
	193	$1
	194	_ACEOF
	195	])
	196
	197	dnl #
	198	dnl # SPL_LANG_PROGRAM(C)([PROLOGUE], [BODY])
	199	dnl #
	200	m4_define([SPL_LANG_PROGRAM], [
	201	$1
	202	int
	203	main (void)
	204	{
	205	dnl Do not indent the following line: there may be CPP directives.
	206	dnl Don't move the `;' right after for the same reason.
	207	$2
	208	;
	209	return 0;
	210	}
	211	])
	212
	213	dnl #
	214	dnl # SPL_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
	215	dnl #
	216	AC_DEFUN([SPL_LINUX_COMPILE_IFELSE], [
	217	m4_ifvaln([$1], [SPL_LINUX_CONFTEST([$1])])dnl
	218	rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
	219	echo "obj-m := conftest.o" >build/Makefile
	220	dnl AS_IF([AC_TRY_COMMAND(cp conftest.c build && make [$2] CC="$CC" -f $PWD/build/Makefile LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM SUBDIRS=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
	221	AS_IF([AC_TRY_COMMAND(cp conftest.c build && make [$2] CC="$CC" LINUXINCLUDE="-Iinclude -include include/linux/autoconf.h" -o tmp_include_depends -o scripts -o include/config/MARKER -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build) >/dev/null && AC_TRY_COMMAND([$3])],
	222	[$4],
	223	[_AC_MSG_LOG_CONFTEST
	224	m4_ifvaln([$5],[$5])dnl])dnl
	225	rm -f build/conftest.o build/conftest.mod.c build/conftest.mod.o build/conftest.ko m4_ifval([$1], [build/conftest.c conftest.c])[]dnl
	226	])
	227
	228	dnl #
	229	dnl # SPL_LINUX_TRY_COMPILE like AC_TRY_COMPILE
	230	dnl #
	231	AC_DEFUN([SPL_LINUX_TRY_COMPILE],
	232	[SPL_LINUX_COMPILE_IFELSE(
d50bd9e2	233	[AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
	234	[modules],
	235	[test -s build/conftest.o],
	236	[$3], [$4])
57d86234	237	])
	238
	239	dnl #
	240	dnl # SPL_LINUX_CONFIG
	241	dnl #
	242	AC_DEFUN([SPL_LINUX_CONFIG],
	243	[AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
	244	SPL_LINUX_TRY_COMPILE([
	245	#ifndef AUTOCONF_INCLUDED
	246	#include <linux/config.h>
	247	#endif
	248	],[
	249	#ifndef CONFIG_$1
	250	#error CONFIG_$1 not #defined
	251	#endif
	252	],[
	253	AC_MSG_RESULT([yes])
	254	$2
	255	],[
	256	AC_MSG_RESULT([no])
	257	$3
	258	])
	259	])
	260
	261	dnl #
	262	dnl # SPL_CHECK_SYMBOL_EXPORT
	263	dnl # check symbol exported or not
	264	dnl #
	265	AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT],
	266	[AC_MSG_CHECKING([whether symbol $1 is exported])
	267	grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/Module.symvers 2>/dev/null
	268	rc=$?
	269	if test $rc -ne 0; then
	270	export=0
	271	for file in $2; do
	272	grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null
	273	rc=$?
	274	if test $rc -eq 0; then
	275	export=1
	276	break;
	277	fi
	278	done
	279	if test $export -eq 0; then
	280	AC_MSG_RESULT([no])
	281	$4
	282	else
	283	AC_MSG_RESULT([yes])
	284	$3
	285	fi
	286	else
	287	AC_MSG_RESULT([yes])
	288	$3
	289	fi
	290	])
	291
86de8532	292	dnl #
	293	dnl # SPL_CHECK_HEADER
	294	dnl # check whether header exists and define HAVE_$2_HEADER
	295	dnl #
	296	AC_DEFUN([SPL_CHECK_HEADER],
	297	[AC_MSG_CHECKING([whether header $1 exists])
	298	SPL_LINUX_TRY_COMPILE([
d50bd9e2	299	#include <$1>
86de8532	300	],[
	301	return 0;
	302	],[
	303	AC_DEFINE(HAVE_$2_HEADER, 1, [$1 exists])
	304	AC_MSG_RESULT(yes)
	305	$3
	306	],[
	307	AC_MSG_RESULT(no)
	308	$4
	309	])
	310	])
6a6cafbe	311
57d86234	312	dnl #
3d061e9d	313	dnl # 2.6.24 API change,
57d86234	314	dnl # check if uintptr_t typedef is defined
	315	dnl #
	316	AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
	317	[AC_MSG_CHECKING([whether kernel defines uintptr_t])
	318	SPL_LINUX_TRY_COMPILE([
d50bd9e2	319	#include <linux/types.h>
57d86234	320	],[
d50bd9e2	321	uintptr_t *ptr;
57d86234	322	],[
d50bd9e2	323	AC_MSG_RESULT([yes])
d50bd9e2	324	AC_DEFINE(HAVE_UINTPTR_T, 1,
57d86234	325	[kernel defines uintptr_t])
57d86234	326	],[
d50bd9e2	327	AC_MSG_RESULT([no])
57d86234	328	])
	329	])
	330
	331	dnl #
3d061e9d	332	dnl # 2.6.20 API change,
57d86234	333	dnl # INIT_WORK use 2 args and not store data inside
	334	dnl #
	335	AC_DEFUN([SPL_AC_3ARGS_INIT_WORK],
	336	[AC_MSG_CHECKING([whether INIT_WORK wants 3 args])
	337	SPL_LINUX_TRY_COMPILE([
d50bd9e2	338	#include <linux/workqueue.h>
57d86234	339	],[
d50bd9e2	340	struct work_struct work;
d50bd9e2	341	INIT_WORK(&work, NULL, NULL);
57d86234	342	],[
d50bd9e2	343	AC_MSG_RESULT(yes)
	344	AC_DEFINE(HAVE_3ARGS_INIT_WORK, 1,
	345	[INIT_WORK wants 3 args])
57d86234	346	],[
d50bd9e2	347	AC_MSG_RESULT(no)
57d86234	348	])
	349	])
	350
	351	dnl #
3d061e9d	352	dnl # 2.6.21 API change,
57d86234	353	dnl # 'register_sysctl_table' use only one argument instead of two
	354	dnl #
	355	AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL],
	356	[AC_MSG_CHECKING([whether register_sysctl_table() wants 2 args])
	357	SPL_LINUX_TRY_COMPILE([
d50bd9e2	358	#include <linux/sysctl.h>
57d86234	359	],[
d50bd9e2	360	return register_sysctl_table(NULL,0);
57d86234	361	],[
d50bd9e2	362	AC_MSG_RESULT(yes)
	363	AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
	364	[register_sysctl_table() wants 2 args])
57d86234	365	],[
d50bd9e2	366	AC_MSG_RESULT(no)
57d86234	367	])
	368	])
	369
57d86234	370	dnl #
3d061e9d	371	dnl # 2.6.23 API change
57d86234	372	dnl # Old set_shrinker API replaced with register_shrinker
	373	dnl #
	374	AC_DEFUN([SPL_AC_SET_SHRINKER], [
	375	AC_MSG_CHECKING([whether set_shrinker() available])
	376	SPL_LINUX_TRY_COMPILE([
	377	#include <linux/mm.h>
	378	],[
	379	return set_shrinker(DEFAULT_SEEKS, NULL);
	380	],[
	381	AC_MSG_RESULT([yes])
	382	AC_DEFINE(HAVE_SET_SHRINKER, 1,
	383	[set_shrinker() available])
	384	],[
	385	AC_MSG_RESULT([no])
	386	])
	387	])
	388
	389	dnl #
3d061e9d	390	dnl # 2.6.25 API change,
57d86234	391	dnl # struct path entry added to struct nameidata
	392	dnl #
	393	AC_DEFUN([SPL_AC_PATH_IN_NAMEIDATA],
	394	[AC_MSG_CHECKING([whether struct path used in struct nameidata])
	395	SPL_LINUX_TRY_COMPILE([
d50bd9e2	396	#include <linux/namei.h>
57d86234	397	],[
d50bd9e2	398	struct nameidata nd;
57d86234	399
	400	nd.path.mnt = NULL;
	401	nd.path.dentry = NULL;
	402	],[
d50bd9e2	403	AC_MSG_RESULT(yes)
	404	AC_DEFINE(HAVE_PATH_IN_NAMEIDATA, 1,
	405	[struct path used in struct nameidata])
57d86234	406	],[
d50bd9e2	407	AC_MSG_RESULT(no)
57d86234	408	])
	409	])
	410
	411	dnl #
	412	dnl # Custom SPL patch may export this system it is not required
	413	dnl #
	414	AC_DEFUN([SPL_AC_TASK_CURR], [
	415	SPL_CHECK_SYMBOL_EXPORT([task_curr], [kernel/sched.c],
	416	[AC_DEFINE(HAVE_TASK_CURR, 1, [task_curr() exported])],
	417	[])
	418	])
	419
	420	dnl #
3d061e9d	421	dnl # 2.6.19 API change,
57d86234	422	dnl # Use CTL_UNNUMBERED when binary sysctl is not required
	423	dnl #
	424	AC_DEFUN([SPL_AC_CTL_UNNUMBERED],
	425	[AC_MSG_CHECKING([whether unnumbered sysctl support exists])
	426	SPL_LINUX_TRY_COMPILE([
d50bd9e2	427	#include <linux/sysctl.h>
57d86234	428	],[
	429	#ifndef CTL_UNNUMBERED
	430	#error CTL_UNNUMBERED undefined
	431	#endif
	432	],[
d50bd9e2	433	AC_MSG_RESULT(yes)
	434	AC_DEFINE(HAVE_CTL_UNNUMBERED, 1,
	435	[unnumbered sysctl support exists])
57d86234	436	],[
d50bd9e2	437	AC_MSG_RESULT(no)
57d86234	438	])
57d86234	439	])
877a32e9	440
	441	dnl #
	442	dnl # 2.6.16 API change.
	443	dnl # Check if 'fls64()' is available
	444	dnl #
	445	AC_DEFUN([SPL_AC_FLS64],
6a6cafbe	446	[AC_MSG_CHECKING([whether fls64() is available])
	447	SPL_LINUX_TRY_COMPILE([
	448	#include <linux/bitops.h>
	449	],[
	450	return fls64(0);
	451	],[
	452	AC_MSG_RESULT(yes)
	453	AC_DEFINE(HAVE_FLS64, 1, [fls64() is available])
	454	],[
	455	AC_MSG_RESULT(no)
	456	])
877a32e9	457	])
46c685d0	458
	459	dnl #
	460	dnl # 2.6.18 API change, check whether device_create() is available.
	461	dnl # Device_create() was introduced in 2.6.18 and depricated
	462	dnl # class_device_create() which was fully removed in 2.6.26.
	463	dnl #
	464	AC_DEFUN([SPL_AC_DEVICE_CREATE], [
	465	SPL_CHECK_SYMBOL_EXPORT(
	466	[device_create],
	467	[drivers/base/core.c],
	468	[AC_DEFINE(HAVE_DEVICE_CREATE, 1,
	469	[device_create() is available])],
6a6cafbe	470	[])
46c685d0	471	])
	472
	473	dnl #
	474	dnl # 2.6.13 API change, check whether class_device_create() is available.
	475	dnl # Class_device_create() was introduced in 2.6.13 and depricated
	476	dnl # class_simple_device_add() which was fully removed in 2.6.13.
	477	dnl #
	478	AC_DEFUN([SPL_AC_CLASS_DEVICE_CREATE], [
	479	SPL_CHECK_SYMBOL_EXPORT(
	480	[class_device_create],
	481	[drivers/base/class.c],
	482	[AC_DEFINE(HAVE_CLASS_DEVICE_CREATE, 1,
	483	[class_device_create() is available])],
6a6cafbe	484	[])
46c685d0	485	])
6a6cafbe	486
6a6cafbe	487	dnl #
	488	dnl # 2.6.26 API change, set_normalized_timespec() is exported.
	489	dnl #
	490	AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT], [
	491	SPL_CHECK_SYMBOL_EXPORT(
	492	[set_normalized_timespec],
	493	[kernel/time.c],
	494	[AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT, 1,
	495	[set_normalized_timespec() is available as export])],
	496	[])
	497	])
	498
	499	dnl #
	500	dnl # 2.6.16 API change, set_normalize_timespec() moved to time.c
	501	dnl # previously it was available in time.h as an inline.
	502	dnl #
86de8532	503	AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE], [
86de8532	504	AC_MSG_CHECKING([whether set_normalized_timespec() is an inline])
6a6cafbe	505	SPL_LINUX_TRY_COMPILE([
6a6cafbe	506	#include <linux/time.h>
6a6cafbe	507	void set_normalized_timespec(struct timespec *ts,
25557fd8	508	time_t sec, long nsec) { }
	509	],
	510	[],
	511	[
6a6cafbe	512	AC_MSG_RESULT(no)
	513	],[
	514	AC_MSG_RESULT(yes)
	515	AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_INLINE, 1,
	516	[set_normalized_timespec() is available as inline])
	517	])
	518	])
	519
	520	dnl #
	521	dnl # 2.6.18 API change,
	522	dnl # timespec_sub() inline function available in linux/time.h
	523	dnl #
86de8532	524	AC_DEFUN([SPL_AC_TIMESPEC_SUB], [
86de8532	525	AC_MSG_CHECKING([whether timespec_sub() is available])
6a6cafbe	526	SPL_LINUX_TRY_COMPILE([
	527	#include <linux/time.h>
	528	],[
	529	struct timespec a, b, c = { 0 };
	530	c = timespec_sub(a, b);
	531	],[
	532	AC_MSG_RESULT(yes)
	533	AC_DEFINE(HAVE_TIMESPEC_SUB, 1, [timespec_sub() is available])
	534	],[
	535	AC_MSG_RESULT(no)
	536	])
	537	])
	538
86de8532	539	dnl #
3d061e9d	540	dnl # 2.6.19 API change,
	541	dnl # check if init_utsname() is available in linux/utsname.h
	542	dnl #
	543	AC_DEFUN([SPL_AC_INIT_UTSNAME], [
	544	AC_MSG_CHECKING([whether init_utsname() is available])
	545	SPL_LINUX_TRY_COMPILE([
	546	#include <linux/utsname.h>
	547	],[
	548	struct new_utsname *a = init_utsname();
	549	],[
	550	AC_MSG_RESULT(yes)
	551	AC_DEFINE(HAVE_INIT_UTSNAME, 1, [init_utsname() is available])
	552	],[
	553	AC_MSG_RESULT(no)
	554	])
	555	])
	556
	557	dnl #
	558	dnl # 2.6.26 API change,
	559	dnl # definition of struct fdtable relocated to linux/fdtable.h
86de8532	560	dnl #
	561	AC_DEFUN([SPL_AC_FDTABLE_HEADER], [
	562	SPL_CHECK_HEADER([linux/fdtable.h], [FDTABLE], [], [])
	563	])
322640b7	564
322640b7	565	dnl #
3d061e9d	566	dnl # 2.6.14 API change,
	567	dnl # check whether 'files_fdtable()' exists
	568	dnl #
	569	AC_DEFUN([SPL_AC_FILES_FDTABLE], [
	570	AC_MSG_CHECKING([whether files_fdtable() is available])
	571	SPL_LINUX_TRY_COMPILE([
	572	#include <linux/sched.h>
	573	#include <linux/file.h>
	574	#ifdef HAVE_FDTABLE_HEADER
	575	#include <linux/fdtable.h>
	576	#endif
	577	],[
	578	struct files_struct *files = current->files;
	579	struct fdtable *fdt = files_fdtable(files);
	580	],[
	581	AC_MSG_RESULT(yes)
	582	AC_DEFINE(HAVE_FILES_FDTABLE, 1, [files_fdtable() is available])
	583	],[
	584	AC_MSG_RESULT(no)
	585	])
	586	])
	587
	588	dnl #
	589	dnl # 2.6.18 API change,
	590	dnl # added linux/uaccess.h
322640b7	591	dnl #
	592	AC_DEFUN([SPL_AC_UACCESS_HEADER], [
	593	SPL_CHECK_HEADER([linux/uaccess.h], [UACCESS], [], [])
	594	])
3d061e9d	595
	596	dnl #
	597	dnl # 2.6.12 API change,
	598	dnl # check whether 'kmalloc_node()' is available.
	599	dnl #
	600	AC_DEFUN([SPL_AC_KMALLOC_NODE], [
	601	AC_MSG_CHECKING([whether kmalloc_node() is available])
	602	SPL_LINUX_TRY_COMPILE([
	603	#include <linux/slab.h>
	604	],[
	605	void *a = kmalloc_node(1, GFP_KERNEL, 0);
	606	],[
	607	AC_MSG_RESULT(yes)
	608	AC_DEFINE(HAVE_KMALLOC_NODE, 1, [kmalloc_node() is available])
	609	],[
	610	AC_MSG_RESULT(no)
	611	])
	612	])
	613
	614	dnl #
	615	dnl # 2.6.9 API change,
	616	dnl # check whether 'monotonic_clock()' is available it may
	617	dnl # be available for some archs but not others.
	618	dnl #
	619	AC_DEFUN([SPL_AC_MONOTONIC_CLOCK], [
	620	SPL_CHECK_SYMBOL_EXPORT(
	621	[monotonic_clock],
	622	[],
	623	[AC_DEFINE(HAVE_MONOTONIC_CLOCK, 1,
	624	[monotonic_clock() is available])],
	625	[])
	626	])
	627
	628	dnl #
	629	dnl # 2.6.16 API change,
	630	dnl # check whether 'struct inode' has i_mutex
	631	dnl #
	632	AC_DEFUN([SPL_AC_INODE_I_MUTEX], [
	633	AC_MSG_CHECKING([whether struct inode has i_mutex])
	634	SPL_LINUX_TRY_COMPILE([
	635	#include <linux/fs.h>
	636	#include <linux/mutex.h>
	637	],[
	638	struct inode i;
	639	mutex_init(&i.i_mutex);
	640	],[
	641	AC_MSG_RESULT(yes)
	642	AC_DEFINE(HAVE_INODE_I_MUTEX, 1, [struct inode has i_mutex])
	643	],[
	644	AC_MSG_RESULT(no)
	645	])
	646	])
b61a6e8b	647
	648	dnl #
	649	dnl # 2.6.14 API change,
	650	dnl # check whether 'div64_64()' is available
	651	dnl #
	652	AC_DEFUN([SPL_AC_DIV64_64], [
	653	AC_MSG_CHECKING([whether div64_64() is available])
	654	SPL_LINUX_TRY_COMPILE([
	655	#include <asm/div64.h>
550f1705	656	#include <linux/types.h>
b61a6e8b	657	],[
	658	uint64_t i = div64_64(1ULL, 1ULL);
	659	],[
	660	AC_MSG_RESULT(yes)
	661	AC_DEFINE(HAVE_DIV64_64, 1, [div64_64() is available])
	662	],[
	663	AC_MSG_RESULT(no)
	664	])
	665	])