]> git.proxmox.com Git - mirror_zfs.git/blobdiff - config/zfs-build.m4
Linux 5.0 compat: Disable vector instructions on 5.0+ kernels
[mirror_zfs.git] / config / zfs-build.m4
index aa8d3e5eefa90d4b212f3b5b4dfa0896d396e127..6e305996e5ebde5e774cb1552f47b92ff1c2bf08 100644 (file)
@@ -6,46 +6,175 @@ AC_DEFUN([ZFS_AC_LICENSE], [
        AC_MSG_RESULT([$ZFS_META_LICENSE])
 ])
 
+AC_DEFUN([ZFS_AC_DEBUG_ENABLE], [
+       DEBUG_CFLAGS="-Werror"
+       DEBUG_CPPFLAGS="-DDEBUG -UNDEBUG"
+       DEBUG_LDFLAGS=""
+       DEBUG_ZFS="_with_debug"
+       AC_DEFINE(ZFS_DEBUG, 1, [zfs debugging enabled])
+
+       KERNEL_DEBUG_CFLAGS="-Werror"
+       KERNEL_DEBUG_CPPFLAGS="-DDEBUG -UNDEBUG"
+])
+
+AC_DEFUN([ZFS_AC_DEBUG_DISABLE], [
+       DEBUG_CFLAGS=""
+       DEBUG_CPPFLAGS="-UDEBUG -DNDEBUG"
+       DEBUG_LDFLAGS=""
+       DEBUG_ZFS="_without_debug"
+
+       KERNEL_DEBUG_CFLAGS=""
+       KERNEL_DEBUG_CPPFLAGS="-UDEBUG -DNDEBUG"
+])
+
+dnl #
+dnl # When debugging is enabled:
+dnl # - Enable all ASSERTs (-DDEBUG)
+dnl # - Promote all compiler warnings to errors (-Werror)
+dnl #
 AC_DEFUN([ZFS_AC_DEBUG], [
-       AC_MSG_CHECKING([whether debugging is enabled])
+       AC_MSG_CHECKING([whether assertion support will be enabled])
        AC_ARG_ENABLE([debug],
                [AS_HELP_STRING([--enable-debug],
-               [Enable generic debug support @<:@default=no@:>@])],
+               [Enable compiler and code assertions @<:@default=no@:>@])],
                [],
                [enable_debug=no])
 
-       AS_IF([test "x$enable_debug" = xyes],
-       [
-               KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
-               HOSTCFLAGS="${HOSTCFLAGS} -DDEBUG -Werror"
-               DEBUG_CFLAGS="-DDEBUG -Werror"
-               DEBUG_STACKFLAGS="-fstack-check"
-       ],
-       [
-               KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG "
-               HOSTCFLAGS="${HOSTCFLAGS} -DNDEBUG "
-               DEBUG_CFLAGS="-DNDEBUG"
-               DEBUG_STACKFLAGS=""
-       ])
+       AS_CASE(["x$enable_debug"],
+               ["xyes"],
+               [ZFS_AC_DEBUG_ENABLE],
+               ["xno"],
+               [ZFS_AC_DEBUG_DISABLE],
+               [AC_MSG_ERROR([Unknown option $enable_debug])])
 
        AC_SUBST(DEBUG_CFLAGS)
-       AC_SUBST(DEBUG_STACKFLAGS)
+       AC_SUBST(DEBUG_CPPFLAGS)
+       AC_SUBST(DEBUG_LDFLAGS)
+       AC_SUBST(DEBUG_ZFS)
+
+       AC_SUBST(KERNEL_DEBUG_CFLAGS)
+       AC_SUBST(KERNEL_DEBUG_CPPFLAGS)
+
        AC_MSG_RESULT([$enable_debug])
 ])
 
+AC_DEFUN([ZFS_AC_DEBUGINFO_ENABLE], [
+       DEBUG_CFLAGS="$DEBUG_CFLAGS -g -fno-inline"
+
+       KERNEL_DEBUG_CFLAGS="$KERNEL_DEBUG_CFLAGS -fno-inline"
+       KERNEL_MAKE="$KERNEL_MAKE CONFIG_DEBUG_INFO=y"
+
+       DEBUGINFO_ZFS="_with_debuginfo"
+])
+
+AC_DEFUN([ZFS_AC_DEBUGINFO_DISABLE], [
+       DEBUGINFO_ZFS="_without_debuginfo"
+])
+
+AC_DEFUN([ZFS_AC_DEBUGINFO], [
+       AC_MSG_CHECKING([whether debuginfo support will be forced])
+       AC_ARG_ENABLE([debuginfo],
+               [AS_HELP_STRING([--enable-debuginfo],
+               [Force generation of debuginfo @<:@default=no@:>@])],
+               [],
+               [enable_debuginfo=no])
+
+       AS_CASE(["x$enable_debuginfo"],
+               ["xyes"],
+               [ZFS_AC_DEBUGINFO_ENABLE],
+               ["xno"],
+               [ZFS_AC_DEBUGINFO_DISABLE],
+               [AC_MSG_ERROR([Unknown option $enable_debuginfo])])
+
+       AC_SUBST(DEBUG_CFLAGS)
+       AC_SUBST(DEBUGINFO_ZFS)
+
+       AC_SUBST(KERNEL_DEBUG_CFLAGS)
+       AC_SUBST(KERNEL_MAKE)
+
+       AC_MSG_RESULT([$enable_debuginfo])
+])
+
+dnl #
+dnl # Disabled by default, provides basic memory tracking.  Track the total
+dnl # number of bytes allocated with kmem_alloc() and freed with kmem_free().
+dnl # Then at module unload time if any bytes were leaked it will be reported
+dnl # on the console.
+dnl #
+AC_DEFUN([ZFS_AC_DEBUG_KMEM], [
+       AC_MSG_CHECKING([whether basic kmem accounting is enabled])
+       AC_ARG_ENABLE([debug-kmem],
+               [AS_HELP_STRING([--enable-debug-kmem],
+               [Enable basic kmem accounting @<:@default=no@:>@])],
+               [],
+               [enable_debug_kmem=no])
+
+       AS_IF([test "x$enable_debug_kmem" = xyes], [
+               KERNEL_DEBUG_CPPFLAGS+=" -DDEBUG_KMEM"
+               DEBUG_KMEM_ZFS="_with_debug_kmem"
+       ], [
+               DEBUG_KMEM_ZFS="_without_debug_kmem"
+       ])
+
+       AC_SUBST(KERNEL_DEBUG_CPPFLAGS)
+       AC_SUBST(DEBUG_KMEM_ZFS)
+
+       AC_MSG_RESULT([$enable_debug_kmem])
+])
+
+dnl #
+dnl # Disabled by default, provides detailed memory tracking.  This feature
+dnl # also requires --enable-debug-kmem to be set.  When enabled not only will
+dnl # total bytes be tracked but also the location of every kmem_alloc() and
+dnl # kmem_free().  When the module is unloaded a list of all leaked addresses
+dnl # and where they were allocated will be dumped to the console.  Enabling
+dnl # this feature has a significant impact on performance but it makes finding
+dnl # memory leaks straight forward.
+dnl #
+AC_DEFUN([ZFS_AC_DEBUG_KMEM_TRACKING], [
+       AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
+       AC_ARG_ENABLE([debug-kmem-tracking],
+               [AS_HELP_STRING([--enable-debug-kmem-tracking],
+               [Enable detailed kmem tracking  @<:@default=no@:>@])],
+               [],
+               [enable_debug_kmem_tracking=no])
+
+       AS_IF([test "x$enable_debug_kmem_tracking" = xyes], [
+               KERNEL_DEBUG_CPPFLAGS+=" -DDEBUG_KMEM_TRACKING"
+               DEBUG_KMEM_TRACKING_ZFS="_with_debug_kmem_tracking"
+       ], [
+               DEBUG_KMEM_TRACKING_ZFS="_without_debug_kmem_tracking"
+       ])
+
+       AC_SUBST(KERNEL_DEBUG_CPPFLAGS)
+       AC_SUBST(DEBUG_KMEM_TRACKING_ZFS)
+
+       AC_MSG_RESULT([$enable_debug_kmem_tracking])
+])
+
 AC_DEFUN([ZFS_AC_CONFIG_ALWAYS], [
-       ZFS_AC_CONFIG_ALWAYS_NO_UNUSED_BUT_SET_VARIABLE
+       ZFS_AC_CONFIG_ALWAYS_CC_NO_UNUSED_BUT_SET_VARIABLE
+       ZFS_AC_CONFIG_ALWAYS_CC_NO_BOOL_COMPARE
+       ZFS_AC_CONFIG_ALWAYS_CC_FRAME_LARGER_THAN
+       ZFS_AC_CONFIG_ALWAYS_CC_NO_FORMAT_TRUNCATION
+       ZFS_AC_CONFIG_ALWAYS_CC_ASAN
+       ZFS_AC_CONFIG_ALWAYS_TOOLCHAIN_SIMD
+       ZFS_AC_CONFIG_ALWAYS_ARCH
+       ZFS_AC_CONFIG_ALWAYS_PYTHON
+       ZFS_AC_CONFIG_ALWAYS_PYZFS
 ])
 
 AC_DEFUN([ZFS_AC_CONFIG], [
-       TARGET_ASM_DIR=asm-generic
-       AC_SUBST(TARGET_ASM_DIR)
-
        ZFS_CONFIG=all
        AC_ARG_WITH([config],
                AS_HELP_STRING([--with-config=CONFIG],
                [Config file 'kernel|user|all|srpm']),
                [ZFS_CONFIG="$withval"])
+       AC_ARG_ENABLE([linux-builtin],
+               [AC_HELP_STRING([--enable-linux-builtin],
+               [Configure for builtin in-tree kernel modules @<:@default=no@:>@])],
+               [],
+               [enable_linux_builtin=no])
 
        AC_MSG_CHECKING([zfs config])
        AC_MSG_RESULT([$ZFS_CONFIG]);
@@ -56,8 +185,8 @@ AC_DEFUN([ZFS_AC_CONFIG], [
        case "$ZFS_CONFIG" in
                kernel) ZFS_AC_CONFIG_KERNEL ;;
                user)   ZFS_AC_CONFIG_USER   ;;
-               all)    ZFS_AC_CONFIG_KERNEL
-                       ZFS_AC_CONFIG_USER   ;;
+               all)    ZFS_AC_CONFIG_USER
+                       ZFS_AC_CONFIG_KERNEL ;;
                srpm)                        ;;
                *)
                AC_MSG_RESULT([Error!])
@@ -66,11 +195,15 @@ AC_DEFUN([ZFS_AC_CONFIG], [
        esac
 
        AM_CONDITIONAL([CONFIG_USER],
-                      [test "$ZFS_CONFIG" = user] ||
-                      [test "$ZFS_CONFIG" = all])
+           [test "$ZFS_CONFIG" = user -o "$ZFS_CONFIG" = all])
        AM_CONDITIONAL([CONFIG_KERNEL],
-                      [test "$ZFS_CONFIG" = kernel] ||
-                      [test "$ZFS_CONFIG" = all])
+           [test "$ZFS_CONFIG" = kernel -o "$ZFS_CONFIG" = all] &&
+           [test "x$enable_linux_builtin" != xyes ])
+       AM_CONDITIONAL([CONFIG_QAT],
+           [test "$ZFS_CONFIG" = kernel -o "$ZFS_CONFIG" = all] &&
+           [test "x$qatsrc" != x ])
+       AM_CONDITIONAL([WANT_DEVNAME2DEVID], [test "x$user_libudev" = xyes ])
+       AM_CONDITIONAL([WANT_MMAP_LIBAIO], [test "x$user_libaio" = xyes ])
 ])
 
 dnl #
@@ -78,6 +211,11 @@ dnl # Check for rpm+rpmbuild to build RPM packages.  If these tools
 dnl # are missing it is non-fatal but you will not be able to build
 dnl # RPM packages and will be warned if you try too.
 dnl #
+dnl # By default the generic spec file will be used because it requires
+dnl # minimal dependencies.  Distribution specific spec files can be
+dnl # placed under the 'rpm/<distribution>' directory and enabled using
+dnl # the --with-spec=<distribution> configure option.
+dnl #
 AC_DEFUN([ZFS_AC_RPM], [
        RPM=rpm
        RPMBUILD=rpmbuild
@@ -102,6 +240,69 @@ AC_DEFUN([ZFS_AC_RPM], [
                AC_MSG_RESULT([$HAVE_RPMBUILD])
        ])
 
+       RPM_DEFINE_COMMON='--define "$(DEBUG_ZFS) 1"'
+       RPM_DEFINE_COMMON+=' --define "$(DEBUG_KMEM_ZFS) 1"'
+       RPM_DEFINE_COMMON+=' --define "$(DEBUG_KMEM_TRACKING_ZFS) 1"'
+       RPM_DEFINE_COMMON+=' --define "$(DEBUGINFO_ZFS) 1"'
+       RPM_DEFINE_COMMON+=' --define "$(ASAN_ZFS) 1"'
+
+       RPM_DEFINE_UTIL=' --define "_initconfdir $(DEFAULT_INITCONF_DIR)"'
+
+       dnl # Make the next three RPM_DEFINE_UTIL additions conditional, since
+       dnl # their values may not be set when running:
+       dnl #
+       dnl #   ./configure --with-config=srpm
+       dnl #
+       AS_IF([test -n "$dracutdir" ], [
+               RPM_DEFINE_UTIL='--define "_dracutdir $(dracutdir)"'
+       ])
+       AS_IF([test -n "$udevdir" ], [
+               RPM_DEFINE_UTIL+=' --define "_udevdir $(udevdir)"'
+       ])
+       AS_IF([test -n "$udevruledir" ], [
+               RPM_DEFINE_UTIL+=' --define "_udevdir $(udevruledir)"'
+       ])
+       RPM_DEFINE_UTIL+=' $(DEFINE_INITRAMFS)'
+       RPM_DEFINE_UTIL+=' $(DEFINE_SYSTEMD)'
+       RPM_DEFINE_UTIL+=' $(DEFINE_PYZFS)'
+       RPM_DEFINE_UTIL+=' $(DEFINE_PYTHON_VERSION)'
+       RPM_DEFINE_UTIL+=' $(DEFINE_PYTHON_PKG_VERSION)'
+
+       dnl # Override default lib directory on Debian/Ubuntu systems.  The
+       dnl # provided /usr/lib/rpm/platform/<arch>/macros files do not
+       dnl # specify the correct path for multiarch systems as described
+       dnl # by the packaging guidelines.
+       dnl #
+       dnl # https://wiki.ubuntu.com/MultiarchSpec
+       dnl # https://wiki.debian.org/Multiarch/Implementation
+       dnl #
+       AS_IF([test "$DEFAULT_PACKAGE" = "deb"], [
+               MULTIARCH_LIBDIR="lib/$(dpkg-architecture -qDEB_HOST_MULTIARCH)"
+               RPM_DEFINE_UTIL+=' --define "_lib $(MULTIARCH_LIBDIR)"'
+               AC_SUBST(MULTIARCH_LIBDIR)
+       ])
+
+       RPM_DEFINE_KMOD='--define "kernels $(LINUX_VERSION)"'
+       RPM_DEFINE_KMOD+=' --define "ksrc $(LINUX)"'
+       RPM_DEFINE_KMOD+=' --define "kobj $(LINUX_OBJ)"'
+       RPM_DEFINE_KMOD+=' --define "_wrong_version_format_terminate_build 0"'
+
+       RPM_DEFINE_DKMS=''
+
+       SRPM_DEFINE_COMMON='--define "build_src_rpm 1"'
+       SRPM_DEFINE_UTIL=
+       SRPM_DEFINE_KMOD=
+       SRPM_DEFINE_DKMS=
+
+       RPM_SPEC_DIR="rpm/generic"
+       AC_ARG_WITH([spec],
+               AS_HELP_STRING([--with-spec=SPEC],
+               [Spec files 'generic|redhat']),
+               [RPM_SPEC_DIR="rpm/$withval"])
+
+       AC_MSG_CHECKING([whether spec files are available])
+       AC_MSG_RESULT([yes ($RPM_SPEC_DIR/*.spec.in)])
+
        AC_SUBST(HAVE_RPM)
        AC_SUBST(RPM)
        AC_SUBST(RPM_VERSION)
@@ -109,6 +310,16 @@ AC_DEFUN([ZFS_AC_RPM], [
        AC_SUBST(HAVE_RPMBUILD)
        AC_SUBST(RPMBUILD)
        AC_SUBST(RPMBUILD_VERSION)
+
+       AC_SUBST(RPM_SPEC_DIR)
+       AC_SUBST(RPM_DEFINE_UTIL)
+       AC_SUBST(RPM_DEFINE_KMOD)
+       AC_SUBST(RPM_DEFINE_DKMS)
+       AC_SUBST(RPM_DEFINE_COMMON)
+       AC_SUBST(SRPM_DEFINE_UTIL)
+       AC_SUBST(SRPM_DEFINE_KMOD)
+       AC_SUBST(SRPM_DEFINE_DKMS)
+       AC_SUBST(SRPM_DEFINE_COMMON)
 ])
 
 dnl #
@@ -174,72 +385,34 @@ AC_DEFUN([ZFS_AC_ALIEN], [
        AC_SUBST(ALIEN_VERSION)
 ])
 
-dnl #
-dnl # Check for pacman+makepkg to build Arch Linux packages.  If these
-dnl # tools are missing it is non-fatal but you will not be able to
-dnl # build Arch Linux packages and will be warned if you try too.
-dnl #
-AC_DEFUN([ZFS_AC_PACMAN], [
-       PACMAN=pacman
-       MAKEPKG=makepkg
-
-       AC_MSG_CHECKING([whether $PACMAN is available])
-       tmp=$($PACMAN --version 2>/dev/null)
-       AS_IF([test -n "$tmp"], [
-               PACMAN_VERSION=$(echo $tmp |
-                                $AWK '/Pacman/ { print $[3] }' |
-                                $SED 's/^v//')
-               HAVE_PACMAN=yes
-               AC_MSG_RESULT([$HAVE_PACMAN ($PACMAN_VERSION)])
-       ],[
-               HAVE_PACMAN=no
-               AC_MSG_RESULT([$HAVE_PACMAN])
-       ])
-
-       AC_MSG_CHECKING([whether $MAKEPKG is available])
-       tmp=$($MAKEPKG --version 2>/dev/null)
-       AS_IF([test -n "$tmp"], [
-               MAKEPKG_VERSION=$(echo $tmp | $AWK '/makepkg/ { print $[3] }')
-               HAVE_MAKEPKG=yes
-               AC_MSG_RESULT([$HAVE_MAKEPKG ($MAKEPKG_VERSION)])
-       ],[
-               HAVE_MAKEPKG=no
-               AC_MSG_RESULT([$HAVE_MAKEPKG])
-       ])
-
-       AC_SUBST(HAVE_PACMAN)
-       AC_SUBST(PACMAN)
-       AC_SUBST(PACMAN_VERSION)
-
-       AC_SUBST(HAVE_MAKEPKG)
-       AC_SUBST(MAKEPKG)
-       AC_SUBST(MAKEPKG_VERSION)
-])
-
 dnl #
 dnl # Using the VENDOR tag from config.guess set the default
 dnl # package type for 'make pkg': (rpm | deb | tgz)
 dnl #
 AC_DEFUN([ZFS_AC_DEFAULT_PACKAGE], [
        AC_MSG_CHECKING([linux distribution])
-       if test -f /etc/redhat-release ; then
-               VENDOR=redhat ;
+       if test -f /etc/toss-release ; then
+               VENDOR=toss ;
        elif test -f /etc/fedora-release ; then
                VENDOR=fedora ;
+       elif test -f /etc/redhat-release ; then
+               VENDOR=redhat ;
        elif test -f /etc/gentoo-release ; then
                VENDOR=gentoo ;
-       elif test -f /etc/debian_version ; then
-               VENDOR=debian ;
+       elif test -f /etc/arch-release ; then
+               VENDOR=arch ;
        elif test -f /etc/SuSE-release ; then
                VENDOR=sles ;
        elif test -f /etc/slackware-version ; then
                VENDOR=slackware ;
-       elif test -f /etc/arch-release ; then
-               VENDOR=arch ;
-       elif test -f /etc/lsb-release ; then
-               VENDOR=ubuntu ;
        elif test -f /etc/lunar.release ; then
                VENDOR=lunar ;
+       elif test -f /etc/lsb-release ; then
+               VENDOR=ubuntu ;
+       elif test -f /etc/debian_version ; then
+               VENDOR=debian ;
+       elif test -f /etc/alpine-release ; then
+               VENDOR=alpine ;
        else
                VENDOR= ;
        fi
@@ -248,46 +421,69 @@ AC_DEFUN([ZFS_AC_DEFAULT_PACKAGE], [
 
        AC_MSG_CHECKING([default package type])
        case "$VENDOR" in
-               redhat)     DEFAULT_PACKAGE=rpm ;;
-               fedora)     DEFAULT_PACKAGE=rpm ;;
-               ubuntu)     DEFAULT_PACKAGE=deb ;;
-               debian)     DEFAULT_PACKAGE=deb ;;
-               sles)       DEFAULT_PACKAGE=rpm ;;
-               slackware)  DEFAULT_PACKAGE=tgz ;;
-               gentoo)     DEFAULT_PACKAGE=tgz ;;
-               lunar)      DEFAULT_PACKAGE=tgz ;;
-               arch)       DEFAULT_PACKAGE=arch;;
-               *)          DEFAULT_PACKAGE=rpm ;;
+               toss)       DEFAULT_PACKAGE=rpm  ;;
+               redhat)     DEFAULT_PACKAGE=rpm  ;;
+               fedora)     DEFAULT_PACKAGE=rpm  ;;
+               gentoo)     DEFAULT_PACKAGE=tgz  ;;
+               alpine)     DEFAULT_PACKAGE=tgz  ;;
+               arch)       DEFAULT_PACKAGE=tgz  ;;
+               sles)       DEFAULT_PACKAGE=rpm  ;;
+               slackware)  DEFAULT_PACKAGE=tgz  ;;
+               lunar)      DEFAULT_PACKAGE=tgz  ;;
+               ubuntu)     DEFAULT_PACKAGE=deb  ;;
+               debian)     DEFAULT_PACKAGE=deb  ;;
+               *)          DEFAULT_PACKAGE=rpm  ;;
        esac
-
        AC_MSG_RESULT([$DEFAULT_PACKAGE])
        AC_SUBST(DEFAULT_PACKAGE)
 
+       DEFAULT_INIT_DIR=$sysconfdir/init.d
        AC_MSG_CHECKING([default init directory])
-       case "$VENDOR" in
-               arch)       DEFAULT_INIT_DIR=$sysconfdir/rc.d ;;
-               *)          DEFAULT_INIT_DIR=$sysconfdir/init.d ;;
-       esac
-
        AC_MSG_RESULT([$DEFAULT_INIT_DIR])
        AC_SUBST(DEFAULT_INIT_DIR)
 
        AC_MSG_CHECKING([default init script type])
        case "$VENDOR" in
+               toss)       DEFAULT_INIT_SCRIPT=redhat ;;
                redhat)     DEFAULT_INIT_SCRIPT=redhat ;;
                fedora)     DEFAULT_INIT_SCRIPT=fedora ;;
-               ubuntu)     DEFAULT_INIT_SCRIPT=lsb ;;
-               debian)     DEFAULT_INIT_SCRIPT=lsb ;;
-               sles)       DEFAULT_INIT_SCRIPT=lsb ;;
-               slackware)  DEFAULT_INIT_SCRIPT=lsb ;;
-               gentoo)     DEFAULT_INIT_SCRIPT=gentoo ;;
-               lunar)      DEFAULT_INIT_SCRIPT=lunar ;;
-               arch)       DEFAULT_INIT_SCRIPT=arch ;;
-               *)          DEFAULT_INIT_SCRIPT=lsb ;;
+               gentoo)     DEFAULT_INIT_SCRIPT=openrc ;;
+               alpine)     DEFAULT_INIT_SCRIPT=openrc ;;
+               arch)       DEFAULT_INIT_SCRIPT=lsb    ;;
+               sles)       DEFAULT_INIT_SCRIPT=lsb    ;;
+               slackware)  DEFAULT_INIT_SCRIPT=lsb    ;;
+               lunar)      DEFAULT_INIT_SCRIPT=lunar  ;;
+               ubuntu)     DEFAULT_INIT_SCRIPT=lsb    ;;
+               debian)     DEFAULT_INIT_SCRIPT=lsb    ;;
+               *)          DEFAULT_INIT_SCRIPT=lsb    ;;
        esac
-
        AC_MSG_RESULT([$DEFAULT_INIT_SCRIPT])
        AC_SUBST(DEFAULT_INIT_SCRIPT)
+
+       AC_MSG_CHECKING([default init config direectory])
+       case "$VENDOR" in
+               alpine)     DEFAULT_INITCONF_DIR=/etc/conf.d    ;;
+               gentoo)     DEFAULT_INITCONF_DIR=/etc/conf.d    ;;
+               toss)       DEFAULT_INITCONF_DIR=/etc/sysconfig ;;
+               redhat)     DEFAULT_INITCONF_DIR=/etc/sysconfig ;;
+               fedora)     DEFAULT_INITCONF_DIR=/etc/sysconfig ;;
+               sles)       DEFAULT_INITCONF_DIR=/etc/sysconfig ;;
+               ubuntu)     DEFAULT_INITCONF_DIR=/etc/default   ;;
+               debian)     DEFAULT_INITCONF_DIR=/etc/default   ;;
+               *)          DEFAULT_INITCONF_DIR=/etc/default   ;;
+       esac
+       AC_MSG_RESULT([$DEFAULT_INITCONF_DIR])
+       AC_SUBST(DEFAULT_INITCONF_DIR)
+
+       AC_MSG_CHECKING([whether initramfs-tools is available])
+       if test -d /usr/share/initramfs-tools ; then
+               DEFINE_INITRAMFS='--define "_initramfs 1"'
+               AC_MSG_RESULT([yes])
+       else
+               DEFINE_INITRAMFS=''
+               AC_MSG_RESULT([no])
+       fi
+       AC_SUBST(DEFINE_INITRAMFS)
 ])
 
 dnl #
@@ -298,6 +494,4 @@ AC_DEFUN([ZFS_AC_PACKAGE], [
        ZFS_AC_RPM
        ZFS_AC_DPKG
        ZFS_AC_ALIEN
-
-       AS_IF([test "$VENDOR" = "arch"], [ZFS_AC_PACMAN])
 ])