[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 # 2.6.x 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 # 2.6.19 API change
dnl # panic_notifier_list use atomic_notifier operations
dnl #

AC_DEFUN([SPL_AC_ATOMIC_PANIC_NOTIFIER],
	[AC_MSG_CHECKING([whether panic_notifier_list is atomic])
	SPL_LINUX_TRY_COMPILE([
	        #include <linux/notifier.h>
	        #include <linux/kernel.h>
	],[
	        struct atomic_notifier_head panic_notifier_list;
	],[
	        AC_MSG_RESULT(yes)
	        AC_DEFINE(HAVE_ATOMIC_PANIC_NOTIFIER, 1,
	                [panic_notifier_list is atomic])
	],[
	        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.x 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.x 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.x 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_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)
	])
])
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(
	233	[AC_LANG_SOURCE([SPL_LANG_PROGRAM([[$1]], [[$2]])])],
	234	[modules],
	235	[test -s build/conftest.o],
	236	[$3], [$4])
	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
6a6cafbe	292
6a6cafbe	293
57d86234	294	dnl #
	295	dnl # 2.6.x API change
	296	dnl # check if uintptr_t typedef is defined
	297	dnl #
	298	AC_DEFUN([SPL_AC_TYPE_UINTPTR_T],
	299	[AC_MSG_CHECKING([whether kernel defines uintptr_t])
	300	SPL_LINUX_TRY_COMPILE([
	301	#include <linux/types.h>
	302	],[
	303	uintptr_t *ptr;
	304	],[
	305	AC_MSG_RESULT([yes])
	306	AC_DEFINE(HAVE_UINTPTR_T, 1,
	307	[kernel defines uintptr_t])
	308	],[
	309	AC_MSG_RESULT([no])
	310	])
	311	])
	312
57d86234	313	dnl #
	314	dnl # 2.6.19 API change
	315	dnl # panic_notifier_list use atomic_notifier operations
	316	dnl #
	317
	318	AC_DEFUN([SPL_AC_ATOMIC_PANIC_NOTIFIER],
	319	[AC_MSG_CHECKING([whether panic_notifier_list is atomic])
	320	SPL_LINUX_TRY_COMPILE([
	321	#include <linux/notifier.h>
	322	#include <linux/kernel.h>
	323	],[
	324	struct atomic_notifier_head panic_notifier_list;
	325	],[
	326	AC_MSG_RESULT(yes)
	327	AC_DEFINE(HAVE_ATOMIC_PANIC_NOTIFIER, 1,
	328	[panic_notifier_list is atomic])
	329	],[
	330	AC_MSG_RESULT(no)
	331	])
	332	])
	333
	334	dnl #
	335	dnl # 2.6.20 API change
	336	dnl # INIT_WORK use 2 args and not store data inside
	337	dnl #
	338	AC_DEFUN([SPL_AC_3ARGS_INIT_WORK],
	339	[AC_MSG_CHECKING([whether INIT_WORK wants 3 args])
	340	SPL_LINUX_TRY_COMPILE([
	341	#include <linux/workqueue.h>
	342	],[
	343	struct work_struct work;
	344
	345	INIT_WORK(&work, NULL, NULL);
	346	],[
	347	AC_MSG_RESULT(yes)
	348	AC_DEFINE(HAVE_3ARGS_INIT_WORK, 1,
	349	[INIT_WORK wants 3 args])
	350	],[
	351	AC_MSG_RESULT(no)
	352	])
	353	])
	354
	355	dnl #
	356	dnl # 2.6.21 api change.
	357	dnl # 'register_sysctl_table' use only one argument instead of two
	358	dnl #
	359	AC_DEFUN([SPL_AC_2ARGS_REGISTER_SYSCTL],
	360	[AC_MSG_CHECKING([whether register_sysctl_table() wants 2 args])
	361	SPL_LINUX_TRY_COMPILE([
	362	#include <linux/sysctl.h>
	363	],[
	364	return register_sysctl_table(NULL,0);
	365	],[
	366	AC_MSG_RESULT(yes)
	367	AC_DEFINE(HAVE_2ARGS_REGISTER_SYSCTL, 1,
	368	[register_sysctl_table() wants 2 args])
	369	],[
	370	AC_MSG_RESULT(no)
	371	])
	372	])
	373
57d86234	374	dnl #
	375	dnl # 2.6.x API change
	376	dnl # Old set_shrinker API replaced with register_shrinker
	377	dnl #
	378	AC_DEFUN([SPL_AC_SET_SHRINKER], [
	379	AC_MSG_CHECKING([whether set_shrinker() available])
	380	SPL_LINUX_TRY_COMPILE([
	381	#include <linux/mm.h>
	382	],[
	383	return set_shrinker(DEFAULT_SEEKS, NULL);
	384	],[
	385	AC_MSG_RESULT([yes])
	386	AC_DEFINE(HAVE_SET_SHRINKER, 1,
	387	[set_shrinker() available])
	388	],[
	389	AC_MSG_RESULT([no])
	390	])
	391	])
	392
	393	dnl #
	394	dnl # 2.6.x API change
	395	dnl # struct path entry added to struct nameidata
	396	dnl #
	397	AC_DEFUN([SPL_AC_PATH_IN_NAMEIDATA],
	398	[AC_MSG_CHECKING([whether struct path used in struct nameidata])
	399	SPL_LINUX_TRY_COMPILE([
	400	#include <linux/namei.h>
	401	],[
	402	struct nameidata nd;
	403
	404	nd.path.mnt = NULL;
	405	nd.path.dentry = NULL;
	406	],[
	407	AC_MSG_RESULT(yes)
	408	AC_DEFINE(HAVE_PATH_IN_NAMEIDATA, 1,
	409	[struct path used in struct nameidata])
	410	],[
	411	AC_MSG_RESULT(no)
	412	])
	413	])
	414
	415	dnl #
	416	dnl # Custom SPL patch may export this system it is not required
	417	dnl #
	418	AC_DEFUN([SPL_AC_TASK_CURR], [
	419	SPL_CHECK_SYMBOL_EXPORT([task_curr], [kernel/sched.c],
	420	[AC_DEFINE(HAVE_TASK_CURR, 1, [task_curr() exported])],
	421	[])
	422	])
	423
	424	dnl #
	425	dnl # 2.6.x API change
	426	dnl # Use CTL_UNNUMBERED when binary sysctl is not required
	427	dnl #
	428	AC_DEFUN([SPL_AC_CTL_UNNUMBERED],
	429	[AC_MSG_CHECKING([whether unnumbered sysctl support exists])
	430	SPL_LINUX_TRY_COMPILE([
	431	#include <linux/sysctl.h>
	432	],[
	433	#ifndef CTL_UNNUMBERED
	434	#error CTL_UNNUMBERED undefined
	435	#endif
	436	],[
	437	AC_MSG_RESULT(yes)
438	AC_DEFINE(HAVE_CTL_UNNUMBERED, 1,
439	[unnumbered sysctl support exists])
440	],[
441	AC_MSG_RESULT(no)
442	])
443	])
877a32e9	444
	445	dnl #
	446	dnl # 2.6.16 API change.
	447	dnl # Check if 'fls64()' is available
	448	dnl #
	449	AC_DEFUN([SPL_AC_FLS64],
6a6cafbe	450	[AC_MSG_CHECKING([whether fls64() is available])
	451	SPL_LINUX_TRY_COMPILE([
	452	#include <linux/bitops.h>
	453	],[
	454	return fls64(0);
	455	],[
	456	AC_MSG_RESULT(yes)
	457	AC_DEFINE(HAVE_FLS64, 1, [fls64() is available])
	458	],[
	459	AC_MSG_RESULT(no)
	460	])
877a32e9	461	])
46c685d0	462
	463	dnl #
	464	dnl # 2.6.18 API change, check whether device_create() is available.
	465	dnl # Device_create() was introduced in 2.6.18 and depricated
	466	dnl # class_device_create() which was fully removed in 2.6.26.
	467	dnl #
	468	AC_DEFUN([SPL_AC_DEVICE_CREATE], [
	469	SPL_CHECK_SYMBOL_EXPORT(
	470	[device_create],
	471	[drivers/base/core.c],
	472	[AC_DEFINE(HAVE_DEVICE_CREATE, 1,
	473	[device_create() is available])],
6a6cafbe	474	[])
46c685d0	475	])
	476
	477	dnl #
	478	dnl # 2.6.13 API change, check whether class_device_create() is available.
	479	dnl # Class_device_create() was introduced in 2.6.13 and depricated
	480	dnl # class_simple_device_add() which was fully removed in 2.6.13.
	481	dnl #
	482	AC_DEFUN([SPL_AC_CLASS_DEVICE_CREATE], [
	483	SPL_CHECK_SYMBOL_EXPORT(
	484	[class_device_create],
	485	[drivers/base/class.c],
	486	[AC_DEFINE(HAVE_CLASS_DEVICE_CREATE, 1,
	487	[class_device_create() is available])],
6a6cafbe	488	[])
46c685d0	489	])
6a6cafbe	490
	491	dnl #
	492	dnl # 2.6.26 API change, set_normalized_timespec() is exported.
	493	dnl #
	494	AC_DEFUN([SPL_AC_CLASS_DEVICE_CREATE], [
	495	SPL_CHECK_SYMBOL_EXPORT(
	496	[class_device_create],
	497	[drivers/base/class.c],
	498	[AC_DEFINE(HAVE_CLASS_DEVICE_CREATE, 1,
	499	[class_device_create() is available])],
	500	[])
	501	])
	502
	503	dnl #
	504	dnl # 2.6.26 API change, set_normalized_timespec() is exported.
	505	dnl #
	506	AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_EXPORT], [
	507	SPL_CHECK_SYMBOL_EXPORT(
	508	[set_normalized_timespec],
	509	[kernel/time.c],
	510	[AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_EXPORT, 1,
	511	[set_normalized_timespec() is available as export])],
	512	[])
	513	])
	514
	515	dnl #
	516	dnl # 2.6.16 API change, set_normalize_timespec() moved to time.c
	517	dnl # previously it was available in time.h as an inline.
	518	dnl #
	519	AC_DEFUN([SPL_AC_SET_NORMALIZED_TIMESPEC_INLINE],
	520	[AC_MSG_CHECKING([whether set_normalized_timespec() is an inline])
	521	SPL_LINUX_TRY_COMPILE([
	522	#include <linux/time.h>
	523	],[
	524	void set_normalized_timespec(struct timespec *ts,
	525	time_t sec, long nsec) { }
	526	],[
	527	AC_MSG_RESULT(no)
	528	],[
	529	AC_MSG_RESULT(yes)
	530	AC_DEFINE(HAVE_SET_NORMALIZED_TIMESPEC_INLINE, 1,
	531	[set_normalized_timespec() is available as inline])
	532	])
	533	])
	534
	535	dnl #
	536	dnl # 2.6.18 API change,
	537	dnl # timespec_sub() inline function available in linux/time.h
	538	dnl #
	539	AC_DEFUN([SPL_AC_TIMESPEC_SUB],
	540	[AC_MSG_CHECKING([whether timespec_sub() is available])
	541	SPL_LINUX_TRY_COMPILE([
	542	#include <linux/time.h>
	543	],[
	544	struct timespec a, b, c = { 0 };
	545	c = timespec_sub(a, b);
	546	],[
	547	AC_MSG_RESULT(yes)
	548	AC_DEFINE(HAVE_TIMESPEC_SUB, 1, [timespec_sub() is available])
	549	],[
	550	AC_MSG_RESULT(no)
	551	])
	552	])
	553