[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.x API change,
dnl # check if atomic64_t typedef is defined
dnl #
AC_DEFUN([SPL_AC_TYPE_ATOMIC64_T],
	[AC_MSG_CHECKING([whether kernel defines atomic64_t])
	SPL_LINUX_TRY_COMPILE([
		#include <asm/atomic.h>
	],[
		atomic64_t *ptr;
	],[
		AC_MSG_RESULT([yes])
		AC_DEFINE(HAVE_ATOMIC64_T, 1,
		          [kernel defines atomic64_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
a0f6da3d	331	dnl #
	332	dnl # 2.6.x API change,
	333	dnl # check if atomic64_t typedef is defined
	334	dnl #
	335	AC_DEFUN([SPL_AC_TYPE_ATOMIC64_T],
	336	[AC_MSG_CHECKING([whether kernel defines atomic64_t])
	337	SPL_LINUX_TRY_COMPILE([
	338	#include <asm/atomic.h>
	339	],[
	340	atomic64_t *ptr;
	341	],[
	342	AC_MSG_RESULT([yes])
	343	AC_DEFINE(HAVE_ATOMIC64_T, 1,
	344	[kernel defines atomic64_t])
	345	],[
	346	AC_MSG_RESULT([no])
	347	])
	348	])
	349
57d86234	350	dnl #
3d061e9d	351	dnl # 2.6.20 API change,
57d86234	352	dnl # INIT_WORK use 2 args and not store data inside
	353	dnl #
	354	AC_DEFUN([SPL_AC_3ARGS_INIT_WORK],
	355	[AC_MSG_CHECKING([whether INIT_WORK wants 3 args])
	356	SPL_LINUX_TRY_COMPILE([
d50bd9e2	357	#include <linux/workqueue.h>
57d86234	358	],[
d50bd9e2	359	struct work_struct work;
d50bd9e2	360	INIT_WORK(&work, NULL, NULL);
57d86234	361	],[
d50bd9e2	362	AC_MSG_RESULT(yes)
	363	AC_DEFINE(HAVE_3ARGS_INIT_WORK, 1,
	364	[INIT_WORK wants 3 args])
57d86234	365	],[
d50bd9e2	366	AC_MSG_RESULT(no)
57d86234	367	])
	368	])
	369
	370	dnl #
3d061e9d	371	dnl # 2.6.21 API change,
57d86234	372	dnl # 'register_sysctl_table' use only one argument instead of two
	373	dnl #
	374	AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL],
	375	[AC_MSG_CHECKING([whether register_sysctl_table() wants 2 args])
	376	SPL_LINUX_TRY_COMPILE([
d50bd9e2	377	#include <linux/sysctl.h>
57d86234	378	],[
d50bd9e2	379	return register_sysctl_table(NULL,0);
57d86234	380	],[
d50bd9e2	381	AC_MSG_RESULT(yes)
	382	AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
	383	[register_sysctl_table() wants 2 args])
57d86234	384	],[
d50bd9e2	385	AC_MSG_RESULT(no)
57d86234	386	])
	387	])
	388
57d86234	389	dnl #
3d061e9d	390	dnl # 2.6.23 API change
57d86234	391	dnl # Old set_shrinker API replaced with register_shrinker
	392	dnl #
	393	AC_DEFUN([SPL_AC_SET_SHRINKER], [
	394	AC_MSG_CHECKING([whether set_shrinker() available])
	395	SPL_LINUX_TRY_COMPILE([
	396	#include <linux/mm.h>
	397	],[
	398	return set_shrinker(DEFAULT_SEEKS, NULL);
	399	],[
	400	AC_MSG_RESULT([yes])
	401	AC_DEFINE(HAVE_SET_SHRINKER, 1,
	402	[set_shrinker() available])
	403	],[
	404	AC_MSG_RESULT([no])
	405	])
	406	])
	407
	408	dnl #
3d061e9d	409	dnl # 2.6.25 API change,
57d86234	410	dnl # struct path entry added to struct nameidata
	411	dnl #
	412	AC_DEFUN([SPL_AC_PATH_IN_NAMEIDATA],
	413	[AC_MSG_CHECKING([whether struct path used in struct nameidata])
	414	SPL_LINUX_TRY_COMPILE([
d50bd9e2	415	#include <linux/namei.h>
57d86234	416	],[
d50bd9e2	417	struct nameidata nd;
57d86234	418
	419	nd.path.mnt = NULL;
	420	nd.path.dentry = NULL;
	421	],[
d50bd9e2	422	AC_MSG_RESULT(yes)
	423	AC_DEFINE(HAVE_PATH_IN_NAMEIDATA, 1,
	424	[struct path used in struct nameidata])
57d86234	425	],[
d50bd9e2	426	AC_MSG_RESULT(no)
57d86234	427	])
	428	])
	429
	430	dnl #
	431	dnl # Custom SPL patch may export this system it is not required
	432	dnl #
	433	AC_DEFUN([SPL_AC_TASK_CURR], [
	434	SPL_CHECK_SYMBOL_EXPORT([task_curr], [kernel/sched.c],
	435	[AC_DEFINE(HAVE_TASK_CURR, 1, [task_curr() exported])],
	436	[])
	437	])
	438
	439	dnl #
3d061e9d	440	dnl # 2.6.19 API change,
57d86234	441	dnl # Use CTL_UNNUMBERED when binary sysctl is not required
	442	dnl #
	443	AC_DEFUN([SPL_AC_CTL_UNNUMBERED],
	444	[AC_MSG_CHECKING([whether unnumbered sysctl support exists])
	445	SPL_LINUX_TRY_COMPILE([
d50bd9e2	446	#include <linux/sysctl.h>
57d86234	447	],[
	448	#ifndef CTL_UNNUMBERED
	449	#error CTL_UNNUMBERED undefined
	450	#endif
	451	],[
d50bd9e2	452	AC_MSG_RESULT(yes)
	453	AC_DEFINE(HAVE_CTL_UNNUMBERED, 1,
	454	[unnumbered sysctl support exists])
57d86234	455	],[
d50bd9e2	456	AC_MSG_RESULT(no)
57d86234	457	])
57d86234	458	])
877a32e9	459
	460	dnl #
	461	dnl # 2.6.16 API change.
	462	dnl # Check if 'fls64()' is available
	463	dnl #
	464	AC_DEFUN([SPL_AC_FLS64],
6a6cafbe	465	[AC_MSG_CHECKING([whether fls64() is available])
	466	SPL_LINUX_TRY_COMPILE([
	467	#include <linux/bitops.h>
	468	],[
	469	return fls64(0);
	470	],[
	471	AC_MSG_RESULT(yes)
	472	AC_DEFINE(HAVE_FLS64, 1, [fls64() is available])
	473	],[
	474	AC_MSG_RESULT(no)
	475	])
877a32e9	476	])
46c685d0	477
	478	dnl #
	479	dnl # 2.6.18 API change, check whether device_create() is available.
	480	dnl # Device_create() was introduced in 2.6.18 and depricated
	481	dnl # class_device_create() which was fully removed in 2.6.26.
	482	dnl #
	483	AC_DEFUN([SPL_AC_DEVICE_CREATE], [
	484	SPL_CHECK_SYMBOL_EXPORT(
	485	[device_create],
	486	[drivers/base/core.c],
	487	[AC_DEFINE(HAVE_DEVICE_CREATE, 1,
	488	[device_create() is available])],
6a6cafbe	489	[])
46c685d0	490	])
	491
	492	dnl #
	493	dnl # 2.6.13 API change, check whether class_device_create() is available.
	494	dnl # Class_device_create() was introduced in 2.6.13 and depricated
	495	dnl # class_simple_device_add() which was fully removed in 2.6.13.
	496	dnl #
	497	AC_DEFUN([SPL_AC_CLASS_DEVICE_CREATE], [
	498	SPL_CHECK_SYMBOL_EXPORT(
	499	[class_device_create],
	500	[drivers/base/class.c],
	501	[AC_DEFINE(HAVE_CLASS_DEVICE_CREATE, 1,
	502	[class_device_create() is available])],
6a6cafbe	503	[])
46c685d0	504	])
6a6cafbe	505
6a6cafbe	506	dnl #
	507	dnl # 2.6.26 API change, set_normalized_timespec() is exported.
	508	dnl #
	509	AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT], [
	510	SPL_CHECK_SYMBOL_EXPORT(
	511	[set_normalized_timespec],
	512	[kernel/time.c],
	513	[AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT, 1,
	514	[set_normalized_timespec() is available as export])],
	515	[])
	516	])
	517
	518	dnl #
	519	dnl # 2.6.16 API change, set_normalize_timespec() moved to time.c
	520	dnl # previously it was available in time.h as an inline.
	521	dnl #
86de8532	522	AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE], [
86de8532	523	AC_MSG_CHECKING([whether set_normalized_timespec() is an inline])
6a6cafbe	524	SPL_LINUX_TRY_COMPILE([
6a6cafbe	525	#include <linux/time.h>
6a6cafbe	526	void set_normalized_timespec(struct timespec *ts,
25557fd8	527	time_t sec, long nsec) { }
	528	],
	529	[],
	530	[
6a6cafbe	531	AC_MSG_RESULT(no)
	532	],[
	533	AC_MSG_RESULT(yes)
	534	AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_INLINE, 1,
	535	[set_normalized_timespec() is available as inline])
	536	])
	537	])
	538
	539	dnl #
	540	dnl # 2.6.18 API change,
	541	dnl # timespec_sub() inline function available in linux/time.h
	542	dnl #
86de8532	543	AC_DEFUN([SPL_AC_TIMESPEC_SUB], [
86de8532	544	AC_MSG_CHECKING([whether timespec_sub() is available])
6a6cafbe	545	SPL_LINUX_TRY_COMPILE([
	546	#include <linux/time.h>
	547	],[
	548	struct timespec a, b, c = { 0 };
	549	c = timespec_sub(a, b);
	550	],[
	551	AC_MSG_RESULT(yes)
	552	AC_DEFINE(HAVE_TIMESPEC_SUB, 1, [timespec_sub() is available])
	553	],[
	554	AC_MSG_RESULT(no)
	555	])
	556	])
	557
86de8532	558	dnl #
3d061e9d	559	dnl # 2.6.19 API change,
	560	dnl # check if init_utsname() is available in linux/utsname.h
	561	dnl #
	562	AC_DEFUN([SPL_AC_INIT_UTSNAME], [
	563	AC_MSG_CHECKING([whether init_utsname() is available])
	564	SPL_LINUX_TRY_COMPILE([
	565	#include <linux/utsname.h>
	566	],[
	567	struct new_utsname *a = init_utsname();
	568	],[
	569	AC_MSG_RESULT(yes)
	570	AC_DEFINE(HAVE_INIT_UTSNAME, 1, [init_utsname() is available])
	571	],[
	572	AC_MSG_RESULT(no)
	573	])
	574	])
	575
	576	dnl #
	577	dnl # 2.6.26 API change,
	578	dnl # definition of struct fdtable relocated to linux/fdtable.h
86de8532	579	dnl #
	580	AC_DEFUN([SPL_AC_FDTABLE_HEADER], [
	581	SPL_CHECK_HEADER([linux/fdtable.h], [FDTABLE], [], [])
	582	])
322640b7	583
322640b7	584	dnl #
3d061e9d	585	dnl # 2.6.14 API change,
	586	dnl # check whether 'files_fdtable()' exists
	587	dnl #
	588	AC_DEFUN([SPL_AC_FILES_FDTABLE], [
	589	AC_MSG_CHECKING([whether files_fdtable() is available])
	590	SPL_LINUX_TRY_COMPILE([
	591	#include <linux/sched.h>
	592	#include <linux/file.h>
	593	#ifdef HAVE_FDTABLE_HEADER
	594	#include <linux/fdtable.h>
	595	#endif
	596	],[
	597	struct files_struct *files = current->files;
	598	struct fdtable *fdt = files_fdtable(files);
	599	],[
	600	AC_MSG_RESULT(yes)
	601	AC_DEFINE(HAVE_FILES_FDTABLE, 1, [files_fdtable() is available])
	602	],[
	603	AC_MSG_RESULT(no)
	604	])
	605	])
	606
	607	dnl #
	608	dnl # 2.6.18 API change,
	609	dnl # added linux/uaccess.h
322640b7	610	dnl #
	611	AC_DEFUN([SPL_AC_UACCESS_HEADER], [
	612	SPL_CHECK_HEADER([linux/uaccess.h], [UACCESS], [], [])
	613	])
3d061e9d	614
	615	dnl #
	616	dnl # 2.6.12 API change,
	617	dnl # check whether 'kmalloc_node()' is available.
	618	dnl #
	619	AC_DEFUN([SPL_AC_KMALLOC_NODE], [
	620	AC_MSG_CHECKING([whether kmalloc_node() is available])
	621	SPL_LINUX_TRY_COMPILE([
	622	#include <linux/slab.h>
	623	],[
	624	void *a = kmalloc_node(1, GFP_KERNEL, 0);
	625	],[
	626	AC_MSG_RESULT(yes)
	627	AC_DEFINE(HAVE_KMALLOC_NODE, 1, [kmalloc_node() is available])
	628	],[
	629	AC_MSG_RESULT(no)
	630	])
	631	])
	632
	633	dnl #
	634	dnl # 2.6.9 API change,
	635	dnl # check whether 'monotonic_clock()' is available it may
	636	dnl # be available for some archs but not others.
	637	dnl #
	638	AC_DEFUN([SPL_AC_MONOTONIC_CLOCK], [
	639	SPL_CHECK_SYMBOL_EXPORT(
	640	[monotonic_clock],
	641	[],
	642	[AC_DEFINE(HAVE_MONOTONIC_CLOCK, 1,
	643	[monotonic_clock() is available])],
	644	[])
	645	])
	646
	647	dnl #
	648	dnl # 2.6.16 API change,
	649	dnl # check whether 'struct inode' has i_mutex
	650	dnl #
	651	AC_DEFUN([SPL_AC_INODE_I_MUTEX], [
	652	AC_MSG_CHECKING([whether struct inode has i_mutex])
	653	SPL_LINUX_TRY_COMPILE([
	654	#include <linux/fs.h>
	655	#include <linux/mutex.h>
	656	],[
	657	struct inode i;
	658	mutex_init(&i.i_mutex);
	659	],[
	660	AC_MSG_RESULT(yes)
	661	AC_DEFINE(HAVE_INODE_I_MUTEX, 1, [struct inode has i_mutex])
	662	],[
	663	AC_MSG_RESULT(no)
	664	])
	665	])
b61a6e8b	666
	667	dnl #
	668	dnl # 2.6.14 API change,
	669	dnl # check whether 'div64_64()' is available
	670	dnl #
	671	AC_DEFUN([SPL_AC_DIV64_64], [
	672	AC_MSG_CHECKING([whether div64_64() is available])
	673	SPL_LINUX_TRY_COMPILE([
	674	#include <asm/div64.h>
550f1705	675	#include <linux/types.h>
b61a6e8b	676	],[
	677	uint64_t i = div64_64(1ULL, 1ULL);
	678	],[
	679	AC_MSG_RESULT(yes)
	680	AC_DEFINE(HAVE_DIV64_64, 1, [div64_64() is available])
	681	],[
	682	AC_MSG_RESULT(no)
	683	])
	684	])