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84a80d5f2d
mirror_zfs/config/spl-build.m4
Brian Behlendorf 84a80d5f2d
Fix undefined RPM macros 
Always invoke the SPL_AC_DEBUG* macro's when running configure
so RPM_DEFINE_COMMON is correctly expanded.  A similar change
was already applied to ZFS.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #703
2018-05-02 15:34:20 -07:00

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###############################################################################
# Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
# Copyright (C) 2007 The Regents of the University of California.
# Written by Brian Behlendorf <behlendorf1@llnl.gov>.
###############################################################################
# SPL_AC_CONFIG_KERNEL: Default SPL kernel configuration.
###############################################################################
AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_KERNEL
if test "${LINUX_OBJ}" != "${LINUX}"; then
KERNELMAKE_PARAMS="$KERNELMAKE_PARAMS O=$LINUX_OBJ"
fi
AC_SUBST(KERNELMAKE_PARAMS)
KERNELCPPFLAGS="$KERNELCPPFLAGS -Wstrict-prototypes"
AC_SUBST(KERNELCPPFLAGS)
SPL_AC_TEST_MODULE
SPL_AC_ATOMIC_SPINLOCK
SPL_AC_SHRINKER_CALLBACK
SPL_AC_CTL_NAME
SPL_AC_CONFIG_TRIM_UNUSED_KSYMS
SPL_AC_PDE_DATA
SPL_AC_SET_FS_PWD_WITH_CONST
SPL_AC_2ARGS_VFS_FSYNC
SPL_AC_INODE_TRUNCATE_RANGE
SPL_AC_FS_STRUCT_SPINLOCK
SPL_AC_KUIDGID_T
SPL_AC_KERNEL_FALLOCATE
SPL_AC_CONFIG_ZLIB_INFLATE
SPL_AC_CONFIG_ZLIB_DEFLATE
SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
SPL_AC_SHRINK_CONTROL_STRUCT
SPL_AC_RWSEM_SPINLOCK_IS_RAW
SPL_AC_RWSEM_ACTIVITY
SPL_AC_RWSEM_ATOMIC_LONG_COUNT
SPL_AC_SCHED_RT_HEADER
SPL_AC_SCHED_SIGNAL_HEADER
SPL_AC_4ARGS_VFS_GETATTR
SPL_AC_3ARGS_VFS_GETATTR
SPL_AC_2ARGS_VFS_GETATTR
SPL_AC_USLEEP_RANGE
SPL_AC_KMEM_CACHE_ALLOCFLAGS
SPL_AC_WAIT_ON_BIT
SPL_AC_INODE_LOCK
SPL_AC_GROUP_INFO_GID
SPL_AC_KMEM_CACHE_CREATE_USERCOPY
SPL_AC_WAIT_QUEUE_ENTRY_T
SPL_AC_WAIT_QUEUE_HEAD_ENTRY
SPL_AC_IO_SCHEDULE_TIMEOUT
SPL_AC_KERNEL_WRITE
SPL_AC_KERNEL_READ
SPL_AC_KERNEL_TIMER_FUNCTION_TIMER_LIST
])
AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
modpost=$LINUX/scripts/Makefile.modpost
AC_MSG_CHECKING([kernel file name for module symbols])
if test "x$enable_linux_builtin" != xyes -a -f "$modpost"; then
if grep -q Modules.symvers $modpost; then
LINUX_SYMBOLS=Modules.symvers
else
LINUX_SYMBOLS=Module.symvers
fi
if ! test -f "$LINUX_OBJ/$LINUX_SYMBOLS"; then
AC_MSG_ERROR([
*** Please make sure the kernel devel package for your distribution
*** is installed. If you are building with a custom kernel, make sure the
*** kernel is configured, built, and the '--with-linux=PATH' configure
*** option refers to the location of the kernel source.])
fi
else
LINUX_SYMBOLS=NONE
fi
AC_MSG_RESULT($LINUX_SYMBOLS)
AC_SUBST(LINUX_SYMBOLS)
])
AC_DEFUN([SPL_AC_KERNEL], [
AC_ARG_WITH([linux],
AS_HELP_STRING([--with-linux=PATH],
[Path to kernel source]),
[kernelsrc="$withval"])
AC_ARG_WITH([linux-obj],
AS_HELP_STRING([--with-linux-obj=PATH],
[Path to kernel build objects]),
[kernelbuild="$withval"])
AC_MSG_CHECKING([kernel source directory])
if test -z "$kernelsrc"; then
if test -e "/lib/modules/$(uname -r)/source"; then
headersdir="/lib/modules/$(uname -r)/source"
sourcelink=$(readlink -f "$headersdir")
elif test -e "/lib/modules/$(uname -r)/build"; then
headersdir="/lib/modules/$(uname -r)/build"
sourcelink=$(readlink -f "$headersdir")
else
sourcelink=$(ls -1d /usr/src/kernels/* \
/usr/src/linux-* \
2>/dev/null | grep -v obj | tail -1)
fi
if test -n "$sourcelink" && test -e ${sourcelink}; then
kernelsrc=`readlink -f ${sourcelink}`
else
kernelsrc="[Not found]"
fi
else
if test "$kernelsrc" = "NONE"; then
kernsrcver=NONE
fi
withlinux=yes
fi
AC_MSG_RESULT([$kernelsrc])
if test ! -d "$kernelsrc"; then
AC_MSG_ERROR([
*** Please make sure the kernel devel package for your distribution
*** is installed and then try again. If that fails, you can specify the
*** location of the kernel source with the '--with-linux=PATH' option.])
fi
AC_MSG_CHECKING([kernel build directory])
if test -z "$kernelbuild"; then
if test x$withlinux != xyes -a -e "/lib/modules/$(uname -r)/build"; then
kernelbuild=`readlink -f /lib/modules/$(uname -r)/build`
elif test -d ${kernelsrc}-obj/${target_cpu}/${target_cpu}; then
kernelbuild=${kernelsrc}-obj/${target_cpu}/${target_cpu}
elif test -d ${kernelsrc}-obj/${target_cpu}/default; then
kernelbuild=${kernelsrc}-obj/${target_cpu}/default
elif test -d `dirname ${kernelsrc}`/build-${target_cpu}; then
kernelbuild=`dirname ${kernelsrc}`/build-${target_cpu}
else
kernelbuild=${kernelsrc}
fi
fi
AC_MSG_RESULT([$kernelbuild])
AC_MSG_CHECKING([kernel source version])
utsrelease1=$kernelbuild/include/linux/version.h
utsrelease2=$kernelbuild/include/linux/utsrelease.h
utsrelease3=$kernelbuild/include/generated/utsrelease.h
if test -r $utsrelease1 && fgrep -q UTS_RELEASE $utsrelease1; then
utsrelease=linux/version.h
elif test -r $utsrelease2 && fgrep -q UTS_RELEASE $utsrelease2; then
utsrelease=linux/utsrelease.h
elif test -r $utsrelease3 && fgrep -q UTS_RELEASE $utsrelease3; then
utsrelease=generated/utsrelease.h
fi
if test "$utsrelease"; then
kernsrcver=`(echo "#include <$utsrelease>";
echo "kernsrcver=UTS_RELEASE") |
cpp -I $kernelbuild/include |
grep "^kernsrcver=" | cut -d \" -f 2`
if test -z "$kernsrcver"; then
AC_MSG_RESULT([Not found])
AC_MSG_ERROR([*** Cannot determine kernel version.])
fi
else
AC_MSG_RESULT([Not found])
if test "x$enable_linux_builtin" != xyes; then
AC_MSG_ERROR([*** Cannot find UTS_RELEASE definition.])
else
AC_MSG_ERROR([
*** Cannot find UTS_RELEASE definition.
*** Please run 'make prepare' inside the kernel source tree.])
fi
fi
AC_MSG_RESULT([$kernsrcver])
LINUX=${kernelsrc}
LINUX_OBJ=${kernelbuild}
LINUX_VERSION=${kernsrcver}
AC_SUBST(LINUX)
AC_SUBST(LINUX_OBJ)
AC_SUBST(LINUX_VERSION)
SPL_AC_MODULE_SYMVERS
])
dnl #
dnl # Default SPL user configuration
dnl #
AC_DEFUN([SPL_AC_CONFIG_USER], [])
dnl #
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([SPL_AC_RPM], [
RPM=rpm
RPMBUILD=rpmbuild
AC_MSG_CHECKING([whether $RPM is available])
AS_IF([tmp=$($RPM --version 2>/dev/null)], [
RPM_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
HAVE_RPM=yes
AC_MSG_RESULT([$HAVE_RPM ($RPM_VERSION)])
],[
HAVE_RPM=no
AC_MSG_RESULT([$HAVE_RPM])
])
AC_MSG_CHECKING([whether $RPMBUILD is available])
AS_IF([tmp=$($RPMBUILD --version 2>/dev/null)], [
RPMBUILD_VERSION=$(echo $tmp | $AWK '/RPM/ { print $[3] }')
HAVE_RPMBUILD=yes
AC_MSG_RESULT([$HAVE_RPMBUILD ($RPMBUILD_VERSION)])
],[
HAVE_RPMBUILD=no
AC_MSG_RESULT([$HAVE_RPMBUILD])
])
RPM_DEFINE_COMMON='--define "$(DEBUG_SPL) 1"'
RPM_DEFINE_COMMON+=' --define "$(DEBUG_KMEM) 1"'
RPM_DEFINE_COMMON+=' --define "$(DEBUG_KMEM_TRACKING) 1"'
RPM_DEFINE_UTIL=
RPM_DEFINE_KMOD='--define "kernels $(LINUX_VERSION)"'
RPM_DEFINE_KMOD+=' --define "_wrong_version_format_terminate_build 0"'
RPM_DEFINE_DKMS=
SRPM_DEFINE_COMMON='--define "build_src_rpm 1"'
SRPM_DEFINE_UTIL=
SRPM_DEFINE_KMOD=
SRPM_DEFINE_DKMS=
RPM_SPEC_DIR="rpm/generic"
AC_ARG_WITH([spec],
AS_HELP_STRING([--with-spec=SPEC],
[Spec files 'generic|redhat']),
[RPM_SPEC_DIR="rpm/$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)
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 #
dnl # Check for dpkg+dpkg-buildpackage to build DEB packages. If these
dnl # tools are missing it is non-fatal but you will not be able to build
dnl # DEB packages and will be warned if you try too.
dnl #
AC_DEFUN([SPL_AC_DPKG], [
DPKG=dpkg
DPKGBUILD=dpkg-buildpackage
AC_MSG_CHECKING([whether $DPKG is available])
AS_IF([tmp=$($DPKG --version 2>/dev/null)], [
DPKG_VERSION=$(echo $tmp | $AWK '/Debian/ { print $[7] }')
HAVE_DPKG=yes
AC_MSG_RESULT([$HAVE_DPKG ($DPKG_VERSION)])
],[
HAVE_DPKG=no
AC_MSG_RESULT([$HAVE_DPKG])
])
AC_MSG_CHECKING([whether $DPKGBUILD is available])
AS_IF([tmp=$($DPKGBUILD --version 2>/dev/null)], [
DPKGBUILD_VERSION=$(echo $tmp | \
$AWK '/Debian/ { print $[4] }' | cut -f-4 -d'.')
HAVE_DPKGBUILD=yes
AC_MSG_RESULT([$HAVE_DPKGBUILD ($DPKGBUILD_VERSION)])
],[
HAVE_DPKGBUILD=no
AC_MSG_RESULT([$HAVE_DPKGBUILD])
])
AC_SUBST(HAVE_DPKG)
AC_SUBST(DPKG)
AC_SUBST(DPKG_VERSION)
AC_SUBST(HAVE_DPKGBUILD)
AC_SUBST(DPKGBUILD)
AC_SUBST(DPKGBUILD_VERSION)
])
dnl #
dnl # Until native packaging for various different packing systems
dnl # can be added the least we can do is attempt to use alien to
dnl # convert the RPM packages to the needed package type. This is
dnl # a hack but so far it has worked reasonable well.
dnl #
AC_DEFUN([SPL_AC_ALIEN], [
ALIEN=alien
AC_MSG_CHECKING([whether $ALIEN is available])
AS_IF([tmp=$($ALIEN --version 2>/dev/null)], [
ALIEN_VERSION=$(echo $tmp | $AWK '{ print $[3] }')
HAVE_ALIEN=yes
AC_MSG_RESULT([$HAVE_ALIEN ($ALIEN_VERSION)])
],[
HAVE_ALIEN=no
AC_MSG_RESULT([$HAVE_ALIEN])
])
AC_SUBST(HAVE_ALIEN)
AC_SUBST(ALIEN)
AC_SUBST(ALIEN_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([SPL_AC_DEFAULT_PACKAGE], [
AC_MSG_CHECKING([linux distribution])
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/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/lunar.release ; then
VENDOR=lunar ;
elif test -f /etc/lsb-release ; then
VENDOR=ubuntu ;
elif test -f /etc/debian_version ; then
VENDOR=debian ;
else
VENDOR= ;
fi
AC_MSG_RESULT([$VENDOR])
AC_SUBST(VENDOR)
AC_MSG_CHECKING([default package type])
case "$VENDOR" in
toss) DEFAULT_PACKAGE=rpm ;;
redhat) DEFAULT_PACKAGE=rpm ;;
fedora) DEFAULT_PACKAGE=rpm ;;
gentoo) 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([$DEFAULT_PACKAGE])
AC_SUBST(DEFAULT_PACKAGE)
])
dnl #
dnl # Default SPL user configuration
dnl #
AC_DEFUN([SPL_AC_PACKAGE], [
SPL_AC_DEFAULT_PACKAGE
SPL_AC_RPM
SPL_AC_DPKG
SPL_AC_ALIEN
])
AC_DEFUN([SPL_AC_LICENSE], [
AC_MSG_CHECKING([spl author])
AC_MSG_RESULT([$SPL_META_AUTHOR])
AC_MSG_CHECKING([spl license])
AC_MSG_RESULT([$SPL_META_LICENSE])
])
AC_DEFUN([SPL_AC_CONFIG], [
SPL_CONFIG=all
AC_ARG_WITH([config],
AS_HELP_STRING([--with-config=CONFIG],
[Config file 'kernel|user|all|srpm']),
[SPL_CONFIG="$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([spl config])
AC_MSG_RESULT([$SPL_CONFIG]);
AC_SUBST(SPL_CONFIG)
case "$SPL_CONFIG" in
kernel) SPL_AC_CONFIG_KERNEL ;;
user) SPL_AC_CONFIG_USER ;;
all) SPL_AC_CONFIG_KERNEL
SPL_AC_CONFIG_USER ;;
srpm) ;;
*)
AC_MSG_RESULT([Error!])
AC_MSG_ERROR([Bad value "$SPL_CONFIG" for --with-config,
user kernel|user|all|srpm]) ;;
esac
AM_CONDITIONAL([CONFIG_USER],
[test "$SPL_CONFIG" = user -o "$SPL_CONFIG" = all])
AM_CONDITIONAL([CONFIG_KERNEL],
[test "$SPL_CONFIG" = kernel -o "$SPL_CONFIG" = all] &&
[test "x$enable_linux_builtin" != xyes ])
])
dnl #
dnl # Enable if the SPL should be compiled with internal debugging enabled.
dnl # By default this support is disabled.
dnl #
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=no@:>@])],
[],
[enable_debug=no])
AS_IF([test "x$enable_debug" = xyes],
[
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG -Werror"
DEBUG_CFLAGS="-DDEBUG -Werror"
DEBUG_SPL="_with_debug"
], [
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG"
DEBUG_CFLAGS="-DNDEBUG"
DEBUG_SPL="_without_debug"
])
AC_SUBST(DEBUG_CFLAGS)
AC_SUBST(DEBUG_SPL)
AC_MSG_RESULT([$enable_debug])
])
dnl #
dnl # Enabled by default it provides a minimal level of memory tracking.
dnl # A total count of bytes allocated is kept for each alloc and free.
dnl # Then at module unload time a report to the console will be printed
dnl # if memory was leaked.
dnl #
AC_DEFUN([SPL_AC_DEBUG_KMEM], [
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$enable_debug_kmem" = xyes],
[
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM"
DEBUG_KMEM="_with_debug_kmem"
AC_DEFINE([DEBUG_KMEM], [1],
[Define to 1 to enable basic kmem accounting])
], [
DEBUG_KMEM="_without_debug_kmem"
])
AC_SUBST(DEBUG_KMEM)
AC_MSG_CHECKING([whether basic kmem accounting is enabled])
AC_MSG_RESULT([$enable_debug_kmem])
])
dnl #
dnl # Disabled by default it provides detailed memory tracking. This
dnl # feature also requires --enable-debug-kmem to be set. When enabled
dnl # not only will total bytes be tracked but also the location of every
dnl # alloc and free. When the SPL module is unloaded a list of all leaked
dnl # addresses and where they were allocated will be dumped to the console.
dnl # Enabling this feature has a significant impact on performance but it
dnl # makes finding memory leaks pretty straight forward.
dnl #
AC_DEFUN([SPL_AC_DEBUG_KMEM_TRACKING], [
AC_ARG_ENABLE([debug-kmem-tracking],
[AS_HELP_STRING([--enable-debug-kmem-tracking],
[Enable detailed kmem tracking @<:@default=no@:>@])],
[],
[enable_debug_kmem_tracking=no])
AS_IF([test "x$enable_debug_kmem_tracking" = xyes],
[
KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG_KMEM_TRACKING"
DEBUG_KMEM_TRACKING="_with_debug_kmem_tracking"
AC_DEFINE([DEBUG_KMEM_TRACKING], [1],
[Define to 1 to enable detailed kmem tracking])
], [
DEBUG_KMEM_TRACKING="_without_debug_kmem_tracking"
])
AC_SUBST(DEBUG_KMEM_TRACKING)
AC_MSG_CHECKING([whether detailed kmem tracking is enabled])
AC_MSG_RESULT([$enable_debug_kmem_tracking])
])
dnl #
dnl # SPL_LINUX_CONFTEST
dnl #
AC_DEFUN([SPL_LINUX_CONFTEST], [
cat confdefs.h - <<_ACEOF >conftest.c
$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([$1])])
rm -Rf build && mkdir -p build && touch build/conftest.mod.c
echo "obj-m := conftest.o" >build/Makefile
modpost_flag=''
test "x$enable_linux_builtin" = xyes && modpost_flag='modpost=true' # fake modpost stage
AS_IF(
[AC_TRY_COMMAND(cp conftest.c build && make [$2] -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build $modpost_flag) >/dev/null && AC_TRY_COMMAND([$3])],
[$4],
[_AC_MSG_LOG_CONFTEST m4_ifvaln([$5],[$5])]
)
rm -Rf build
])
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_CHECK_SYMBOL_EXPORT
dnl # check symbol exported or not
dnl #
AC_DEFUN([SPL_CHECK_SYMBOL_EXPORT], [
grep -q -E '[[[:space:]]]$1[[[:space:]]]' \
$LINUX_OBJ/Module*.symvers 2>/dev/null
rc=$?
if test $rc -ne 0; then
export=0
for file in $2; do
grep -q -E "EXPORT_SYMBOL.*($1)" \
"$LINUX_OBJ/$file" 2>/dev/null
rc=$?
if test $rc -eq 0; then
export=1
break;
fi
done
if test $export -eq 0; then :
$4
else :
$3
fi
else :
$3
fi
])
dnl #
dnl # SPL_LINUX_TRY_COMPILE_SYMBOL
dnl # like SPL_LINUX_TRY_COMPILE, except SPL_CHECK_SYMBOL_EXPORT
dnl # is called if not compiling for builtin
dnl #
AC_DEFUN([SPL_LINUX_TRY_COMPILE_SYMBOL], [
SPL_LINUX_TRY_COMPILE([$1], [$2], [rc=0], [rc=1])
if test $rc -ne 0; then :
$6
else
if test "x$enable_linux_builtin" != xyes; then
SPL_CHECK_SYMBOL_EXPORT([$3], [$4], [rc=0], [rc=1])
fi
if test $rc -ne 0; then :
$6
else :
$5
fi
fi
])
dnl #
dnl # SPL_CHECK_SYMBOL_HEADER
dnl # check if a symbol prototype is defined in listed headers.
dnl #
AC_DEFUN([SPL_CHECK_SYMBOL_HEADER], [
AC_MSG_CHECKING([whether symbol $1 exists in header])
header=0
for file in $3; do
grep -q "$2" "$LINUX/$file" 2>/dev/null
rc=$?
if test $rc -eq 0; then
header=1
break;
fi
done
if test $header -eq 0; then
AC_MSG_RESULT([no])
$5
else
AC_MSG_RESULT([yes])
$4
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)
$4
])
])
dnl #
dnl # Basic toolchain sanity check. Verify that kernel modules can
dnl # be built and which symbols can be used.
dnl #
AC_DEFUN([SPL_AC_TEST_MODULE],
[AC_MSG_CHECKING([whether modules can be built])
SPL_LINUX_TRY_COMPILE([],[],[
AC_MSG_RESULT([yes])
],[
AC_MSG_RESULT([no])
if test "x$enable_linux_builtin" != xyes; then
AC_MSG_ERROR([*** Unable to build an empty module.])
else
AC_MSG_ERROR([
*** Unable to build an empty module.
*** Please run 'make scripts' inside the kernel source tree.])
fi
])
AS_IF([test "x$cross_compiling" != xyes], [
AC_RUN_IFELSE([
AC_LANG_PROGRAM([
#include "$LINUX/include/linux/license.h"
], [
return !license_is_gpl_compatible(
"$SPL_META_LICENSE");
])
], [
AC_DEFINE([SPL_IS_GPL_COMPATIBLE], [1],
[Define to 1 if GPL-only symbols can be used])
], [
])
])
])
dnl #
dnl # Use the atomic implemenation based on global spinlocks. This
dnl # should only be needed by 32-bit kernels which do not provide
dnl # the atomic64_* API. It may be optionally enabled as a fallback
dnl # if problems are observed with the direct mapping to the native
dnl # Linux atomic operations. You may not disable atomic spinlocks
dnl # if you kernel does not an atomic64_* API.
dnl #
AC_DEFUN([SPL_AC_ATOMIC_SPINLOCK], [
AC_ARG_ENABLE([atomic-spinlocks],
[AS_HELP_STRING([--enable-atomic-spinlocks],
[Atomic types use spinlocks @<:@default=check@:>@])],
[],
[enable_atomic_spinlocks=check])
SPL_LINUX_TRY_COMPILE([
#include <linux/fs.h>
],[
atomic64_t *ptr __attribute__ ((unused));
],[
have_atomic64_t=yes
AC_DEFINE(HAVE_ATOMIC64_T, 1,
[kernel defines atomic64_t])
],[
have_atomic64_t=no
])
AS_IF([test "x$enable_atomic_spinlocks" = xcheck], [
AS_IF([test "x$have_atomic64_t" = xyes], [
enable_atomic_spinlocks=no
],[
enable_atomic_spinlocks=yes
])
])
AS_IF([test "x$enable_atomic_spinlocks" = xyes], [
AC_DEFINE([ATOMIC_SPINLOCK], [1],
[Atomic types use spinlocks])
],[
AS_IF([test "x$have_atomic64_t" = xno], [
AC_MSG_FAILURE(
[--disable-atomic-spinlocks given but required atomic64 support is unavailable])
])
])
AC_MSG_CHECKING([whether atomic types use spinlocks])
AC_MSG_RESULT([$enable_atomic_spinlocks])
AC_MSG_CHECKING([whether kernel defines atomic64_t])
AC_MSG_RESULT([$have_atomic64_t])
])
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