-dnl as-linux.m4 0.0.1
+dnl as-linux.m4 0.2.0
+
dnl autostars m4 macro for detecting a Linux source tree (or
dnl equivalent) for compiling modules.
-dnl
+
dnl David Schleef <ds@schleef.org>
dnl Frank Mori Hess <fmhess@users.sourceforge.net>
-dnl thomas@apestaart.org
-dnl
+dnl Thomas Vander Stichele <thomas@apestaart.org>
+
+dnl $Id$
+
dnl AS_LINUX()
dnl
-dnl this macro adds the options --with-linuxdir and --with-linux-config.
+dnl this macro adds the options
+dnl --with-linuxdir to specify a kernel build tree location
+dnl --with-linuxsrcdir to specify a kernel source tree location
+dnl --with-linuxconfig to specify a kernel .config file
+dnl --with-kernel-release to specify an alternative uname -r
+dnl --with-machine to specify an alternative uname -m
+dnl --with-rpm-target to specify to match the given rpm --target option
+dnl --with-extraversion to specify an EXTRAVERSION override
+dnl --with-modulesdir to specify the base install location of modules
+dnl --with-modulesdeveldir to specify the base install location of build stuff
+
dnl this macro defines:
dnl LINUX_DIR
-dnl The directory where the Linux source resides.
+dnl The directory where the Linux build tree resides.
+dnl LINUX_SRC_DIR
+dnl The directory where the Linux source tree resides.
dnl CONFIG_FILE
dnl The Linux config file
dnl LINUX_ARCH
dnl Path to linker (possibly with options) used by Linux.
dnl LINUX_AS
dnl Assembler used by Linux.
+dnl LINUX_MODULE_STYLE
+dnl Style of module building (2.4.0, 2.6.0, 2.6.6)
dnl LINUX_MODULE_EXT
dnl Module extension (.o or .ko)
+dnl LINUX_MODPOST
+dnl path to modpost script
+dnl MODULESDIR
+dnl base install path for kernel modules
+dnl MODULESDEVELDIR
+dnl base install path for kernel module development files
dnl
-dnl
dnl End of search list.
+dnl main entry point
+dnl checks the version, and figures out all flags to use to make modules.
+AC_DEFUN([AS_LINUX],
+[
+ dnl check if user supplied a uname -r, and if not use the running one
+ AS_LINUX_KERNEL_RELEASE()
+ dnl check if user supplied a uname -m, and if not use the running one
+ AS_LINUX_MACHINE()
+ dnl check if the user supplied an rpm target arch
+ dnl override the LINUX_MACHINE value if he did
+ AS_LINUX_RPM_TARGET()
+
+ dnl find the kernel build tree for the given uname -r
+ AS_LINUX_DIR()
+ dnl override kernel release uname -r value with info from build tree
+ AS_LINUX_OVERRIDE_KERNEL_RELEASE($LINUX_DIR)
+ dnl find the kernel source tree from the build tree or --with-linuxsrcdir
+ AS_LINUX_SRC_DIR($LINUX_DIR)
+ dnl check if user supplied an EXTRAVERSION, and if not get from uname -r
+ AS_LINUX_EXTRAVERSION($LINUX_KERNEL_RELEASE)
+ dnl check if user supplied a config file; if not, guess a good one
+ AS_LINUX_CONFIG($LINUX_DIR, $LINUX_KERNEL_RELEASE, $LINUX_MACHINE)
+ dnl check if we're building on pre-FC2 Red Hat/Fedora,
+ dnl and add some flags if we are
+ AS_CHECK_REDHAT_PRE_FC2()
+ dnl check for where to install modules
+ AS_LINUX_MODULESDIR($LINUX_KERNEL_RELEASE)
+ dnl check for where to install module development files
+ AS_LINUX_MODULESDEVELDIR($LINUX_DIR)
+ dnl check for the MAJOR/MINOR version of Linux
+ AS_LINUX_VERSION_MAJOR_MINOR($LINUX_DIR)
+
+ dnl now call the correct macro to get compiler flags
+ dnl the versioned AS_LINUX macros just use the global variables
+ dnl this could be cleaned up later on if we feel like it
+ case $LINUX_VERSION_MAJOR.$LINUX_VERSION_MINOR in
+ 2.6 | 3.[[0-9]]*)
+ AS_LINUX_2_6()
+ ;;
+ 2.[[01234]])
+ AS_LINUX_2_4()
+ ;;
+ *)
+ AC_MSG_ERROR([Unknown Linux major.minor $LINUX_VERSION_MAJOR.$LINUX_VERSION_MINOR])
+ ;;
+ esac
+])
-dnl check if we can find a source dir for the Linux kernel
-dnl defines LINUX_DIR to the absolute location of a usable kernel source tree
-AC_DEFUN(AS_LINUX_DIR,
+dnl check if we can find a build dir for the Linux kernel
+dnl defines LINUX_DIR to the absolute location of a usable kernel build tree
+AC_DEFUN([AS_LINUX_DIR],
[
AC_ARG_WITH([linuxdir],
[AC_HELP_STRING([--with-linuxdir=DIR],
- [specify path to Linux source directory])],
+ [specify path to Linux build directory])],
[LINUX_DIR="${withval}"],
[LINUX_DIR=default])
if test "${LINUX_DIR}" != "default" ; then
- AS_TRY_LINUX_DIR([${LINUX_DIR}], , AC_MSG_ERROR([Linux dir not found]) )
+ AS_TRY_LINUX_DIR([${LINUX_DIR}], , AC_MSG_ERROR([Linux build dir not found]) )
fi
if test "${LINUX_DIR}" = "default" ; then
- dir="/lib/modules/`uname -r`/build";
+ dir="/lib/modules/$LINUX_KERNEL_RELEASE/build";
AS_TRY_LINUX_DIR([${dir}], [LINUX_DIR=${dir}], )
fi
if test "${LINUX_DIR}" = "default" ; then
fi
if test "${LINUX_DIR}" = "default" ; then
- AC_MSG_ERROR([Linux source directory not found])
+ AC_MSG_ERROR([Linux build directory not found])
fi
AC_SUBST(LINUX_DIR)
])
+dnl check if the given candidate path for a linux build tree is usable
+AC_DEFUN([AS_TRY_LINUX_DIR],
+ [AC_MSG_CHECKING(for Linux build in $1)
+
+ if test -f "$1/Makefile" ; then
+ result=yes
+ $2
+ else
+ result="not found"
+ $3
+ fi
+
+ AC_MSG_RESULT($result)
+])
+
+dnl get the kernel source directory
+dnl $1 is the kernel build directory
+dnl defines LINUX_SRC_DIR to the absolute location of kernel source tree
+AC_DEFUN([AS_LINUX_SRC_DIR],
+[
+ AC_ARG_WITH([linuxsrcdir],
+ [AC_HELP_STRING([--with-linuxsrcdir=DIR],
+ [specify path to Linux source directory])],
+ [LINUX_SRC_DIR="${withval}"],
+ [LINUX_SRC_DIR=default])
+
+ if test "${LINUX_SRC_DIR}" != "default" ; then
+ AS_TRY_LINUX_SRC_DIR([${LINUX_SRC_DIR}], , AC_MSG_ERROR([Linux source dir not found]) )
+ fi
+
+ if test "${LINUX_SRC_DIR}" = "default" ; then
+ AC_MSG_CHECKING(for separate Linux source and build directory)
+ dir=`sed -n -e 's/^KERNELSRC *:= *\(.*\)/\1/p' "$1/Makefile"`
+ if test -z "$dir"; then
+ # 2.6.25
+ dir=`sed -n -e 's/^MAKEARGS *:= *-C *\([[^[:space:]]]*\).*/\1/p' "$1/Makefile"`
+ fi
+ if test -z "$dir"; then
+ AC_MSG_RESULT([no])
+ LINUX_SRC_DIR="$1"
+ else
+ AC_MSG_RESULT([yes])
+ case "$dir" in
+ .*) dir="$1/$dir" ;;
+ esac
+ AS_TRY_LINUX_SRC_DIR([${dir}], [LINUX_SRC_DIR=${dir}], )
+ fi
+ fi
+
+ if test "${LINUX_SRC_DIR}" = "default" ; then
+ AC_MSG_ERROR([Linux source directory not found])
+ fi
+
+ AC_SUBST(LINUX_SRC_DIR)
+])
+
dnl check if the given candidate path for a linux source tree is usable
-AC_DEFUN(AS_TRY_LINUX_DIR,
- [AC_MSG_CHECKING(for Linux in $1)
+AC_DEFUN([AS_TRY_LINUX_SRC_DIR],
+ [AC_MSG_CHECKING(for Linux source in $1)
if test -f "$1/Makefile" ; then
result=yes
AC_MSG_RESULT($result)
])
+dnl allow for specifying a kernel release (uname -r) to build for
+dnl use uname -r of running one if not specified
+dnl store result in LINUX_KERNEL_RELEASE
+AC_DEFUN([AS_LINUX_KERNEL_RELEASE],
+[
+ AC_ARG_WITH([kernel-release],
+ [AC_HELP_STRING([--with-kernel-release=RELEASE],
+ [specify the "uname -r"-value to build for])],
+ [LINUX_KERNEL_RELEASE="${withval}"],
+ [LINUX_KERNEL_RELEASE=`uname -r`])
+ if test "x$LINUX_KERNEL_RELEASE" = "xyes";
+ then
+ LINUX_KERNEL_RELEASE=`uname -r`
+ fi
+ AC_MSG_NOTICE([Using $LINUX_KERNEL_RELEASE as the uname -r value])
+])
+
+dnl replaces LINUX_KERNEL_RELEASE once the Linux build directory is known
+dnl first argument is the Linux build directory
+AC_DEFUN([AS_LINUX_OVERRIDE_KERNEL_RELEASE],
+[
+ INCDIR="$1/include"
+ UTSINC="${INCDIR}/linux/utsrelease.h"
+ if ! test -f "${UTSINC}"; then
+ UTSINC="${INCDIR}/linux/version.h"
+ fi
+ if test -f "${UTSINC}"; then
+ RELEASE=`echo UTS_RELEASE | cat "${UTSINC}" - |
+ /lib/cpp -I "${INCDIR}" | tail -n 1 |
+ sed 's/^"\(.*\)"$/\1/'`
+ if test "${RELEASE}" != "UTS_RELEASE" -a "${RELEASE}" != "" \
+ -a "${RELEASE}" != "${LINUX_KERNEL_RELEASE}"; then
+ AC_MSG_NOTICE([Overriding uname -r value with ${RELEASE}])
+ LINUX_KERNEL_RELEASE="${RELEASE}"
+ fi
+
+ fi
+])
+
+dnl allow for specifying a machine (uname -m) to build for
+dnl use uname -m, of running one if not specified
+dnl store result in LINUX_MACHINE
+AC_DEFUN([AS_LINUX_MACHINE],
+[
+ AC_ARG_WITH([machine],
+ [AC_HELP_STRING([--with-machine=MACHINE],
+ [specify the "uname -m"-value to build for])],
+ [LINUX_MACHINE="${withval}"],
+ [LINUX_MACHINE=`uname -m`])
+ if test "x$LINUX_MACHINE" = "xyes";
+ then
+ LINUX_MACHINE=`uname -m`
+ fi
+ AC_MSG_NOTICE([Using $LINUX_MACHINE as the uname -m value])
+])
+dnl allow for specifying an rpm target arch
+dnl if none specified, try to guess one from running rpm querying for
+dnl the kernel with the uname -r
+dnl this is so configure without arguments works out of the box
+dnl FIXME: investigate if uname -p is a correct guess for this, and if
+dnl we should have a flag for specifying it instead
+
+dnl this macro possibly overrides LINUX_MACHINE
+
+dnl first argument is the kernel release building for
+AC_DEFUN([AS_LINUX_RPM_TARGET],
+[
+ RELEASE=$LINUX_KERNEL_RELEASE
+ AC_ARG_WITH([rpm-target],
+ [AC_HELP_STRING([--with-rpm-target=TARGET],
+ [specify the target arch to build for])],
+ [LINUX_RPM_TARGET="${withval}"],
+ [LINUX_RPM_TARGET=])
+ if test "x$LINUX_RPM_TARGET" = "x"
+ then
+ dnl if we have rpm, try to guess the target of the kernel
+ dnl we want to build for using rpm
+ AC_PATH_PROG([RPM], [rpm], [no])
+ if test "x$RPM" != "xno" ; then
+ if $RPM -q kernel-$RELEASE > /dev/null
+ then
+ LINUX_RPM_TARGET=`$RPM -q --queryformat %{arch} kernel-$RELEASE`
+ else
+ AC_MSG_NOTICE([Cannot guess target arch, consider setting it using --with-rpm-target])
+ fi
+ fi
+ fi
+
+ dnl now override LINUX_MACHINE if LINUX_RPM_TARGET is set
+ if test "x$LINUX_RPM_TARGET" != "x"
+ then
+ dnl override LINUX_MACHINE based on this
+ dnl FIXME: add other possible Red Hat/Fedora/rpm targets here
+ LINUX_MACHINE=
+ case "$LINUX_RPM_TARGET" in
+ i?86) LINUX_MACHINE=i386;;
+ athlon) LINUX_MACHINE=i386;;
+ x86_64) LINUX_MACHINE=x86_64;;
+ esac
+ if test "x$LINUX_MACHINE" = "x"
+ then
+ AC_MSG_ERROR(Could not guess uname -m value from target $LINUX_RPM_TARGET)
+ fi
+ fi
+])
+
+
+dnl allow for specifying an override for EXTRAVERSION
+dnl if none specified, make it from the passed-in KERNEL_RELEASE (uname -r)
+dnl resulting value is stored in LINUX_EXTRAVERSION
+dnl first argument is the uname -r string to use as a fallback
+AC_DEFUN([AS_LINUX_EXTRAVERSION],
+[
+ KERNEL_RELEASE=[$1]
+ dnl extract the default by getting everything after first -
+ LINUX_EXTRAVERSION="-`echo $KERNEL_RELEASE | cut -d- -f 2-`"
+ AC_ARG_WITH([extraversion],
+ [AC_HELP_STRING([--with-extraversion=FILE],
+ [specify override for kernel EXTRAVERSION])],
+ [LINUX_EXTRAVERSION="${withval}"],)
+])
+
+
dnl check if we can find a config file for the Linux kernel
-dnl defines CONFIG_FILE to the absolute location of a usable kernel source tree
-dnl uses LINUX_DIR to find either .config or decent configs in configs/
-AC_DEFUN(AS_CONFIG_FILE,
+dnl defines LINUX_CONFIG to the absolute location of a usable
+dnl kernel source config file
+
+dnl for rpm distros, it can try and guess the correct config file by
+dnl checking the global LINUX_RPM_TARGET variable set somewhere else
+dnl (FIXME: move this to an argument instead ?)
+
+dnl first argument is LINUX_DIR to check for possible configs
+dnl second argument is kernel-release (uname -r)
+dnl third argument is machine (uname -m)
+
+AC_DEFUN([AS_LINUX_CONFIG],
[
- AC_ARG_WITH([linux-config],
- [AC_HELP_STRING([--with-linux-config=FILE],
+ LINUX_DIR=[$1]
+ KERNEL_RELEASE=[$2]
+ MACHINE=[$3]
+ AC_ARG_WITH([linuxconfig],
+ [AC_HELP_STRING([--with-linuxconfig=FILE],
[specify path to Linux configuration file])],
- [CONFIG_FILE="${withval}"],
- [CONFIG_FILE=default])
+ [LINUX_CONFIG="${withval}"],
+ [LINUX_CONFIG=default])
- if test "${CONFIG_FILE}" != "default" ; then
- AS_TRY_CONFIG_FILE([${CONFIG_FILE}], , AC_MSG_ERROR([Linux config not found]) )
+ dnl if a file got specified, try it as a linux config file
+ if test "${LINUX_CONFIG}" != "default" ; then
+ AS_TRY_LINUX_CONFIG($LINUX_CONFIG, $MACHINE,
+ ,, AC_MSG_ERROR([Linux config not found]) )
fi
- dnl if default specified, first check for the regular .config file
+ dnl if no file specified, first check for the regular .config file
dnl in LINUX_DIR created by manual configuration
- if test "${CONFIG_FILE}" = "default" ; then
+ if test "${LINUX_CONFIG}" = "default" ; then
file="$LINUX_DIR/.config";
- AS_TRY_CONFIG_FILE([${file}], [CONFIG_FILE=${file}], )
+ AS_TRY_LINUX_CONFIG($file, $MACHINE,
+ [LINUX_CONFIG=${file}], )
fi
dnl second, try to guess what config file to use for the current kernel
- if test "${CONFIG_FILE}" = "default" ; then
+ dnl FIXME: the possible arch is from rpmbuild --target, and is
+ dnl different from the value of ARCH (Makefile) or MACHINE (uname -m)
+ dnl so we should have a redhat flag to specify the target to find
+ dnl the correct config file
+ if test "${LINUX_CONFIG}" = "default" && test "x$LINUX_RPM_TARGET" != "x"; then
dnl Red Hat stores configuration files for their built kernels
dnl named kernel-(version)-(arch)(extra).config
dnl where arch is athlon, i386, i586, i686, x86_64
dnl and (extra) is empty or -smp, -BOOT, -bigmem
dnl haven't seen combinations of extra yet as of FC1
- version=`uname -r | cut -d- -f1`
- machine=`uname -m`
+ KVERSION=`echo $KERNEL_RELEASE | cut -d- -f1`
extra=
- uname -r | grep smp && extra="-smp"
- uname -r | grep bigmem && extra="-bigmem"
- uname -r | grep BOOT && extra="-BOOT"
- file="$LINUX_DIR/configs/kernel-$version-$machine$extra.config"
- AS_TRY_CONFIG_FILE([${file}], [CONFIG_FILE=${file}], )
+ echo $KERNEL_RELEASE | grep smp && EXTRA="-smp"
+ echo $KERNEL_RELEASE | grep bigmem && EXTRA="-bigmem"
+ echo $KERNEL_RELEASE | grep BOOT && EXTRA="-BOOT"
+ file="$LINUX_DIR/configs/kernel-$KVERSION-$LINUX_RPM_TARGET$EXTRA.config"
+ AS_TRY_LINUX_CONFIG($file, $MACHINE,
+ [LINUX_CONFIG=${file}], )
fi
- if test "${CONFIG_FILE}" = "default" ; then
+ if test "${LINUX_CONFIG}" = "default" ; then
AC_MSG_ERROR([
The kernel source tree at ${LINUX_DIR} is not configured,
and no configuration files in config/ matching your kernel were found.
-Fix before continuing or specify a config file using --with-linux-config.])
+Fix before continuing or specify a config file using --with-configfile.])
fi
- AC_SUBST(CONFIG_FILE)
+ AC_SUBST(LINUX_CONFIG)
])
dnl check if the given candidate config file is usable
-AC_DEFUN(AS_TRY_CONFIG_FILE,
- [AC_MSG_CHECKING(for configuration in $1)
+dnl FIXME: it would be nice if it could check if it matches the
+dnl given machine (uname -m)
+AC_DEFUN([AS_TRY_LINUX_CONFIG],
+[
+ CFG=[$1]
+ MACHINE=[$2]
+ AC_MSG_CHECKING($CFG)
- if test -f "$1" ; then
+ if test -f "$CFG" ; then
result=yes
- $2
+ ifelse([$3], , :, [$3])
else
result="not found"
- $3
+ ifelse([$4], , :, [$4])
fi
-
AC_MSG_RESULT($result)
])
dnl check if RED_HAT_LINUX_KERNEL is defined
-dnl RH/Fedora defines this in linux/rhconfig.h, included from linux/version.h
+dnl pre-FC2 RH/Fedora defines this in linux/rhconfig.h
+dnl included from linux/version.h
dnl if this is present, a few extra defines need to be present to make sure
dnl symbol versioning is correct
dnl uses LINUX_DIR to find rhconfig.h
-AC_DEFUN(AS_CHECK_REDHAT,
+AC_DEFUN([AS_CHECK_REDHAT_PRE_FC2],
[
- AC_MSG_CHECKING(Red Hat/Fedora kernel)
+ AC_MSG_CHECKING(Pre-FC2 Red Hat/Fedora kernel)
HAVE_REDHAT_KERNEL=false
ac_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -I${LINUX_DIR}/include/linux"
AC_COMPILE_IFELSE(AC_LANG_PROGRAM([
#include "rhconfig.h"
int code = RED_HAT_LINUX_KERNEL;
- ]),
+ ]),
AC_MSG_RESULT(found); HAVE_REDHAT_KERNEL=true,
AC_MSG_RESULT(not found))
dnl restore CFLAGS
BIGMEM='0'
HUGEMEM='0'
- dnl get variables from the currently running kernel as default
- KERNEL_TYPE=`uname -r | sed 's_^.*\(smp\|enterprise\|bigmem\|hugemem\)$_-\1_;t;s_.*__;'`
+ dnl get variables from the currently running kernel as default
+ KERNEL_TYPE=`uname -r | sed 's_^.*\(smp\|enterprise\|bigmem\|hugemem\)$_\1_;t;s_.*__;'`
KERNEL_RELEASE=`uname -r | sed 's|smp\|enterprise\|bigmem\|hugemem||g'`
KERNEL_ARCH=`uname -m`
AS_CHECK_LINUX_CONFIG_OPTION(CONFIG_MK7, KERNEL_ARCH=athlon)
dnl check the config file and override KERNEL_TYPE
- AS_CHECK_LINUX_CONFIG_OPTION(CONFIG_SMP, KERNEL_TYPE=-smp)
+ AS_CHECK_LINUX_CONFIG_OPTION(CONFIG_SMP, KERNEL_TYPE=smp)
dnl bigmem is also smp, so this check is done after smp to override
- AS_CHECK_LINUX_CONFIG_OPTION(CONFIG_HIGHMEM64G, KERNEL_TYPE=-bigmem)
+ AS_CHECK_LINUX_CONFIG_OPTION(CONFIG_HIGHMEM64G, KERNEL_TYPE=bigmem)
dnl FIXME: need to check hugemem and enterprise config files, which
dnl aren't provided in Fedora Core 1 !
case "$KERNEL_TYPE" in
- -smp) SMP='1';;
- -enterprise) ENTERPRISE='1';;
- -bigmem) BIGMEM='1';;
- -hugemem) HUGEMEM='1';;
+ smp) SMP='1';;
+ enterprise) ENTERPRISE='1';;
+ bigmem) BIGMEM='1';;
+ hugemem) HUGEMEM='1';;
*) UP='1';;
esac
REDHAT_CFLAGS="-D__MODULE_KERNEL_$KERNEL_ARCH=1"
REDHAT_CFLAGS="$REDHAT_CFLAGS -D__BOOT_KERNEL_SMP=$SMP"
REDHAT_CFLAGS="$REDHAT_CFLAGS -D__BOOT_KERNEL_BIGMEM=$BIGMEM"
REDHAT_CFLAGS="$REDHAT_CFLAGS -D__BOOT_KERNEL_HUGEMEM=$HUGEMEM"
-])
-dnl main entry point
-dnl checks the version, and figures out all flags to use to make modules.
-AC_DEFUN(AS_LINUX,
-[
- AS_LINUX_DIR()
- AS_CONFIG_FILE()
- AS_CHECK_REDHAT()
+ LINUX_REDHAT_CFLAGS="$REDHAT_CFLAGS"
- AC_MSG_CHECKING([Linux major/minor version])
+ AC_SUBST(LINUX_KERNEL_TYPE, "$KERNEL_TYPE")
+])
- if [[ ! -f "${LINUX_DIR}/include/linux/version.h" ]];then
- AC_MSG_ERROR([The header file include/linux/version.h does not exist.
-For 2.6 kernels, it can be generated by running 'make prepare' in
-the kernel source directory.])
+dnl add an argument to specify/override the module install path
+dnl if nothing specified, it will be /lib/modules/(kernelrel)
+AC_DEFUN([AS_LINUX_MODULESDIR],
+[
+ KERNEL_RELEASE=[$1]
+ AC_ARG_WITH([modulesdir],
+ [AC_HELP_STRING([--with-modulesdir=DIR],
+ [specify path to kernel-specific modules install directory])],
+ [MODULESDIR="${withval}"],
+ [MODULESDIR=default])
+
+ if test "${MODULESDIR}" = "default" ; then
+ MODULESDIR="/lib/modules/${KERNEL_RELEASE}"
fi
- dnl the next set of tests is for figuring out version major/minor
- dnl we make sure we have the right version.h by faking out CFLAGS
- ac_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -I${LINUX_DIR}/include/linux"
- dnl make sure we find version.h and it contains LINUX_VERSION_CODE
- AC_COMPILE_IFELSE(AC_LANG_PROGRAM([
-#include "version.h"
-int code = LINUX_VERSION_CODE;
-]),
- :, AC_MSG_ERROR([${LINUX_DIR}/include/linux/version.h does not contain LINUX_VERSION_CODE]))
-
-
- dnl figure out the linux kernel version major and minor
- dnl using the LINUX_VERSION_CODE defined in include/linux/version.h
- AC_RUN_IFELSE(AC_LANG_PROGRAM([
-#include "version.h"
-#define KERNEL_VERSION_MAJOR(code) ((code) >> 16)
-],[
- return KERNEL_VERSION_MAJOR(LINUX_VERSION_CODE);
-]),
- LINUX_VERSION_MAJOR=0,
- LINUX_VERSION_MAJOR=$?)
- AC_RUN_IFELSE(AC_LANG_PROGRAM([
-#include "version.h"
-#define KERNEL_VERSION_MINOR(code) (((code) >> 8) & 0xff)
-],[
- return KERNEL_VERSION_MINOR(LINUX_VERSION_CODE);
-]),
- LINUX_VERSION_MINOR=0,
- LINUX_VERSION_MINOR=$?)
- AC_MSG_RESULT($LINUX_VERSION_MAJOR.$LINUX_VERSION_MINOR)
- dnl restore CFLAGS
- CFLAGS="$ac_save_CFLAGS"
+ dnl make it available to Makefiles so it can be used in ...dir
+ AC_SUBST(modulesdir, $MODULESDIR)
+ AC_MSG_NOTICE([Putting kernel modules under ${MODULESDIR}])
+])
- case $LINUX_VERSION_MAJOR.$LINUX_VERSION_MINOR in
- 2.6)
- AS_LINUX_2_6()
- ;;
- 2.[[01234]])
- AS_LINUX_2_4()
- ;;
- *)
- AC_MSG_ERROR([Unknown Linux major.minor $LINUX_VERSION_MAJOR.$LINUX_VERSION_MINOR])
- ;;
- esac
+dnl add an argument to specify/override the module devel install path
+dnl if nothing specified, it will be the passed in LINUXDIR)
+AC_DEFUN([AS_LINUX_MODULESDEVELDIR],
+[
+ LINUXDIR=[$1]
+ AC_ARG_WITH([modulesdeveldir],
+ [AC_HELP_STRING([--with-modulesdeveldir=DIR],
+ [specify path to kernel-specific module development install directory])],
+ [MODULESDEVELDIR="${withval}"],
+ [MODULESDEVELDIR=default])
+
+ if test "${MODULESDEVELDIR}" = "default" ; then
+ MODULESDEVELDIR="${LINUXDIR}"
+ fi
+ dnl make it available to Makefiles so it can be used in ...dir
+ AC_SUBST(modulesdeveldir, $MODULESDEVELDIR)
+ AC_MSG_NOTICE([Putting kernel module development files under ${MODULESDEVELDIR}])
])
-AC_DEFUN(AS_LINUX_2_6,
+AC_DEFUN([AS_LINUX_2_6],
[
AC_MSG_CHECKING(for Linux CFLAGS)
- tmpdir="`pwd`/tmp-noicrwa"
-
- rm -rf ${tmpdir} || :
- mkdir ${tmpdir}
+ {
+ tmpdir=`(umask 077 && mktemp -d -q "./confstatXXXXXX") 2>/dev/null` &&
+ test -n "$tmpdir" && test -d "$tmpdir"
+ } ||
+ {
+ tmpdir=./confstat$$-$RANDOM
+ (umask 077 && mkdir $tmpdir)
+ } ||
+ {
+ echo "$me: cannot create a temporary directory in ." >&2
+ { (exit 1); exit 1; }
+ }
+
+ tmpdir=`pwd`/$tmpdir
cat >${tmpdir}/Makefile <<EOF
obj-m += fake.o
.PHONY: flags
flags:
echo LINUX_ARCH=\"\$(ARCH)\" >>\$(obj)/flags
- echo LINUX_AFLAGS=\"\$(AFLAGS)\" | sed 's_Iinclude_I"\$(LINUXDIR)/include"_g'>>\$(obj)/flags
+ echo LINUX_AFLAGS=\"\$(AFLAGS)\" | sed 's,include,"\$(LINUXDIR)/include",g'>>\$(obj)/flags
echo LINUX_LDFLAGS=\"\" >>\$(obj)/flags
echo LINUX_ARFLAGS=\"\$(ARFLAGS)\" >>\$(obj)/flags
echo LINUX_CROSS_COMPILE=\"\$(CROSS_COMPILE)\" >>\$(obj)/flags
echo LINUX_KERNELRELEASE=\"\$(KERNELRELEASE)\" >>\$(obj)/flags
- echo LINUX_CFLAGS=\"\$(CFLAGS)\" | sed 's_Iinclude_I"\$(LINUXDIR)/include"_g'>>\$(obj)/flags
- echo LINUX_FLAGS=\"\$(CFLAGS)\" | sed 's_Iinclude_I"\$(LINUXDIR)/include"_g'>>\$(obj)/flags
+ echo LINUX_CFLAGS=\"\$(CFLAGS) \$(CPPFLAGS)\" \
+ | sed -e 's,-Iinclude,-I\$(LINUXDIR)/include,g' -e 's,-include include,-include \$(LINUXDIR)/include,g' >>\$(obj)/flags
+ echo LINUX_CFLAGS_MODULE=\"\$(CFLAGS_MODULE)\" >>\$(obj)/flags
echo LINUX_CC=\"\$(CC)\" >>\$(obj)/flags
- echo LINUX_LD=\"\$(LD) \$(LDFLAGS)\" >>\$(obj)/flags
+ echo LINUX_LD=\"\$(LD) \$(LDFLAGS) \$(LDFLAGS_MODULE)\" >>\$(obj)/flags
echo LINUX_AS=\"\$(AS)\" >>\$(obj)/flags
+ echo LINUX_MODLIB=\"\$(MODLIB)\" >>\$(obj)/flags
EOF
- echo ${MAKE-make} -C ${LINUX_DIR} V=1 SUBDIRS=${tmpdir} LINUXDIR=${LINUX_DIR} MODVERDIR=${tmpdir} modules >&5 2>&5
- ${MAKE-make} -C ${LINUX_DIR} V=1 SUBDIRS=${tmpdir} LINUXDIR=${LINUX_DIR} MODVERDIR=${tmpdir} modules >&5 2>&5
+ echo ${MAKE-make} -C ${LINUX_DIR} V=1 SUBDIRS=${tmpdir} LINUXDIR=${LINUX_DIR} modules >&5 2>&5
+ ${MAKE-make} -C ${LINUX_DIR} V=1 SUBDIRS=${tmpdir} LINUXDIR=${LINUX_DIR} modules >&5 2>&5
. ${tmpdir}/flags
rm -rf ${tmpdir}
LINUX_MODULE_EXT=".ko"
+ LINUX_MODULE_STYLE="2.6.6"
+
+ LINUX_CFLAGS="$LINUX_CFLAGS $LINUX_CFLAGS_MODULE"
AC_SUBST(LINUX_ARCH)
AC_SUBST(LINUX_AFLAGS)
AC_SUBST(LINUX_LD)
AC_SUBST(LINUX_AS)
AC_SUBST(LINUX_MODULE_EXT)
+ AC_SUBST(LINUX_MODULE_STYLE)
+ AC_SUBST(LINUX_MODPOST)
+ AC_SUBST(LINUX_MODLIB)
- AC_MSG_RESULT([ok])
+ AC_MSG_RESULT([$LINUX_CFLAGS])
+
+ AC_PATH_PROG([LINUX_MODPOST], ["modpost"], ["no"], ["$LINUX_DIR/scripts:$LINUX_DIR/scripts/mod"])
])
-AC_DEFUN(AS_LINUX_2_4,
+AC_DEFUN([AS_LINUX_2_4],
[
AC_MSG_CHECKING(for Linux 2.4 make flags)
dnl we try to figure out the CFLAGS by invoking the Makefile on
dnl we use the correct config file by substituting the MAKEFILES
dnl Makefile variable, which originally points to .config
- if [[ ! -f "${LINUX_DIR}/.hdepend" ]];then
- AC_MSG_ERROR([
-You need to run 'make dep' on the kernel source before continuing.])
+ if [[ ! -e "${LINUX_DIR}/.hdepend" ]];then
+ AC_MSG_WARN([
+No .hdepend file found, you may need to run 'make dep' on the kernel source before continuing.])
fi
- TMPFILE=`mktemp /tmp/linux.XXXXXXXX` || exit 1
-
- POPDIR=`(pwd)`
- cd ${LINUX_DIR}
-( sed "s|\.config|${CONFIG_FILE}|g" Makefile && cat <<EOF ) | make -f - get_cflags > ${TMPFILE}
-
-get_cflags:
+ {
+ tmpdir=`(umask 077 && mktemp -d -q "./confstatXXXXXX") 2>/dev/null` &&
+ test -n "$tmpdir" && test -d "$tmpdir"
+ } ||
+ {
+ tmpdir=./confstat$$-$RANDOM
+ (umask 077 && mkdir $tmpdir)
+ } ||
+ {
+ echo "$me: cannot create a temporary directory in ." >&2
+ { (exit 1); exit 1; }
+ }
+ tmpdir=`pwd`/$tmpdir
+
+ #sed "s|\.config|${CONFIG_FILE}|g" ${LINUX_DIR}/Makefile >$tmpdir/Makefile
+ cat >$tmpdir/Makefile <<EOF
+modules:
@echo LINUX_ARCH=\"\$(ARCH)\"
@echo LINUX_AFLAGS=\"\$(AFLAGS)\" | sed 's_Iinclude_I\"\$(LINUXDIR)/include\"_g'
@echo LINUX_LDFLAGS=\"\"
@echo LINUX_LD=\"\$(LD) \$(LDFLAGS)\"
@echo LINUX_AS=\"\$(AS)\"
EOF
- . ${TMPFILE}
- rm -rf ${TMPFILE}
- cd $POPDIR
+ make -C ${LINUX_DIR} SUBDIRS=${tmpdir} modules | grep ^LINUX_ >${tmpdir}/ack
+ if (($?)); then
+ echo make modules with LINUX_DIR=$(LINUX_DIR) failed.
+ exit 1
+ fi
+ . ${tmpdir}/ack
+ rm -rf ${tmpdir}
LINUX_MODULE_EXT=".o"
+ LINUX_MODULE_STYLE="2.4.0"
LINUX_CFLAGS="$LINUX_CFLAGS $LINUX_MODFLAGS"
AC_SUBST(LINUX_LD)
AC_SUBST(LINUX_AS)
AC_SUBST(LINUX_MODULE_EXT)
+ AC_SUBST(LINUX_MODULE_STYLE)
AC_MSG_RESULT([ok])
AC_MSG_RESULT($LINUX_LDFLAGS)
])
-AC_DEFUN(AS_CHECK_LINUX_CONFIG_OPTION,
+AC_DEFUN([AS_CHECK_LINUX_CONFIG_OPTION],
[
AC_MSG_CHECKING([Linux config option $1])
- if grep '^$1=y$' ${CONFIG_FILE} >/dev/null 2>/dev/null; then
+ if grep '^$1=y$' ${LINUX_CONFIG} >/dev/null 2>/dev/null; then
result=yes
$2
- else if grep '^$1=m$' ${CONFIG_FILE} >/dev/null 2>/dev/null; then
+ else if grep '^$1=m$' ${LINUX_CONFIG} >/dev/null 2>/dev/null; then
result=module
$3
else
AC_MSG_RESULT([$result])
])
-AC_DEFUN(AS_LINUX_CONFIG_OPTION,
+AC_DEFUN([AS_LINUX_CONFIG_OPTION],
[
AS_CHECK_LINUX_CONFIG_OPTION([$1],
[$1=yes],
AM_CONDITIONAL([$1],[test "${$1}" = yes])
])
-AC_DEFUN(AS_LINUX_CONFIG_OPTION_MODULE,
+AC_DEFUN([AS_LINUX_CONFIG_OPTION_MODULE],
[
AS_CHECK_LINUX_CONFIG_OPTION([$1],
[$1=yes],
AM_CONDITIONAL([$1],[test "${$1}" = yes -o "${$1}" = module])
])
+dnl check for the major/minor version of the Linux source by checking
+dnl the Makefile
+dnl first argument is the linux directory
+dnl sets LINUX_VERSION_MAJOR and LINUX_VERSION_MINOR
+AC_DEFUN([AS_LINUX_VERSION_MAJOR_MINOR],
+[
+ LINUX_DIR=[$1]
+ AC_MSG_CHECKING([Linux major/minor version])
+
+ if [[ ! -f "${LINUX_DIR}/Makefile" ]];then
+ AC_MSG_ERROR([The Linux kernel Makefile does not exist.])
+ fi
+ dnl the next set of tests is for figuring out version major/minor
+ dnl use VERSION and PATCHLEVEL in the kernel Makefile
+ LINUX_VERSION_MAJOR=`sed -n 's/^VERSION = \([[0-9]]*\)/\1/p' "${LINUX_DIR}/Makefile"`
+ LINUX_VERSION_MINOR=`sed -n 's/^PATCHLEVEL = \([[0-9]]*\)/\1/p' "${LINUX_DIR}/Makefile"`
+ if [[ -z "$LINUX_VERSION_MAJOR" -o -z "$LINUX_VERSION_MINOR" ]]; then
+ AC_MSG_ERROR([No major/minor version information found in Linux kernel Makefile.])
+ fi
+ AC_MSG_RESULT($LINUX_VERSION_MAJOR.$LINUX_VERSION_MINOR)
+])
+
+# COMEDI_CHECK_LINUX_KBUILD([LINUX_SOURCE_PATH], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------------------------
+#
+# Check if kernel source tree is recent enough to support "Kbuild" files.
+AC_DEFUN([COMEDI_CHECK_LINUX_KBUILD],
+[
+ AC_MSG_CHECKING([for Kbuild support in $1])
+ dnl If $1/scripts/Makefile.build refers to $(<something>)/Kbuild
+ dnl then we support Kbuild (2.6.10 onwards).
+ if grep -q '/Kbuild' "$1/scripts/Makefile.build" 2>/dev/null; then
+ AC_MSG_RESULT([yes])
+ $2
+ else
+ AC_MSG_RESULT([no])
+ $3
+ fi
+])
+
+# COMEDI_CHECK_PCMCIA_PROBE([LINUX_SOURCE_PATH], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------------------------
+#
+# Check if kernel pcmcia support is new enough to have a probe member in the pcmcia_driver
+# struct.
+AC_DEFUN([COMEDI_CHECK_PCMCIA_DRIVER_PROBE],
+[
+ AC_REQUIRE([AC_PROG_EGREP])
+ AC_MSG_CHECKING([$1 for probe in pcmcia_driver struct])
+ cat "$1/include/pcmcia/ds.h" | tr \\n ' ' | [$EGREP "struct[[:space:]]+pcmcia_driver[[:space:]]*[{][^}]*probe"] > /dev/null
+ if (($?)); then
+ AC_MSG_RESULT([no])
+ $3
+ else
+ AC_MSG_RESULT([yes])
+ $2
+ fi
+])
+
+# COMEDI_CHECK_PCMCIA_DRIVER_NAME([LINUX_SOURCE_PATH], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------------------------
+#
+# Check if kernel pcmcia support is new enough to have a name member in the pcmcia_driver
+# struct.
+AC_DEFUN([COMEDI_CHECK_PCMCIA_DRIVER_NAME],
+[
+ AC_REQUIRE([AC_PROG_EGREP])
+ AC_MSG_CHECKING([$1 for name in pcmcia_driver struct])
+ cat "$1/include/pcmcia/ds.h" | tr \\n ' ' | [$EGREP "struct[[:space:]]+pcmcia_driver[[:space:]]*[{][^}]*name"] > /dev/null
+ if (($?)); then
+ AC_MSG_RESULT([no])
+ $3
+ else
+ AC_MSG_RESULT([yes])
+ $2
+ fi
+])
+
+# COMEDI_CHECK_PCMCIA_LOOP_TUPLE([LINUX_SOURCE_PATH], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------------------------
+#
+# Check if kernel pcmcia support is new enough to have the pcmcia_loop_tuple
+# function.
+AC_DEFUN([COMEDI_CHECK_PCMCIA_LOOP_TUPLE],
+[
+ AC_MSG_CHECKING([$1 for pcmcia_loop_tuple function])
+ if [grep -q 'int[[:space:]]\+pcmcia_loop_tuple[[:space:]]*(' "$1/include/pcmcia/ds.h"] 2>/dev/null ; then
+ AC_MSG_RESULT([yes])
+ $2
+ else
+ AC_MSG_RESULT([no])
+ $3
+ fi
+])
+
+# COMEDI_CHECK_DS_DEV_NODE_T([LINUX_SOURCE_PATH], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------------------------
+#
+# Check if kernel pcmcia support is old enough to have the dev_node_t type
+# in pcmcia/ds.h.
+AC_DEFUN([COMEDI_CHECK_DS_DEV_NODE_T],
+[
+ AC_MSG_CHECKING([$1 for dev_node_t in pcmcia/ds.h (removed in 2.6.35)])
+ if [grep -q dev_node_t "$1/include/pcmcia/ds.h"] 2>/dev/null ; then
+ AC_MSG_RESULT([yes])
+ $2
+ else
+ AC_MSG_RESULT([no])
+ $3
+ fi
+])
+
+# COMEDI_CHECK_CS_IRQ_REQ_T([LINUX_SOURCE_PATH], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------------------------
+#
+# Check if kernel pcmcia support is old enough to have the irq_req_t type
+# in pcmcia/cs.h.
+AC_DEFUN([COMEDI_CHECK_CS_IRQ_REQ_T],
+[
+ AC_MSG_CHECKING([$1 for irq_req_t in pcmcia/cs.h (removed in 2.6.35)])
+ if [grep -q irq_req_t "$1/include/pcmcia/cs.h"] 2>/dev/null ; then
+ AC_MSG_RESULT([yes])
+ $2
+ else
+ AC_MSG_RESULT([no])
+ $3
+ fi
+])
+
+# COMEDI_CHECK_CS_IO_REQ_T([LINUX_SOURCE_PATH], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------------------------
+#
+# Check if kernel pcmcia support is old enough to have the io_req_t type
+# in pcmcia/cs.h.
+AC_DEFUN([COMEDI_CHECK_CS_IO_REQ_T],
+[
+ AC_MSG_CHECKING([$1 for io_req_t in pcmcia/cs.h (removed in 2.6.36)])
+ if [grep -q io_req_t "$1/include/pcmcia/cs.h"] 2>/dev/null ; then
+ AC_MSG_RESULT([yes])
+ $2
+ else
+ AC_MSG_RESULT([no])
+ $3
+ fi
+])
+
+# COMEDI_CHECK_CS_MEMREQ_T([LINUX_SOURCE_PATH], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------------------------
+#
+# Check if kernel pcmcia support is old enough to have the memreq_t type
+# in pcmcia/cs.h.
+AC_DEFUN([COMEDI_CHECK_CS_MEMREQ_T],
+[
+ AC_MSG_CHECKING([$1 for memreq_t in pcmcia/cs.h (removed in 2.6.36)])
+ if [grep -q memreq_t "$1/include/pcmcia/cs.h"] 2>/dev/null ; then
+ AC_MSG_RESULT([yes])
+ $2
+ else
+ AC_MSG_RESULT([no])
+ $3
+ fi
+])
+
+# COMEDI_CHECK_HAVE_CS_TYPES_H([LINUX_SOURCE_PATH], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------------------------
+#
+# Check if kernel has <pcmcia/cs_types.h> file.
+AC_DEFUN([COMEDI_CHECK_HAVE_CS_TYPES_H],
+[
+ AC_MSG_CHECKING([$1 for include/pcmcia/cs_types.h (removed in 2.6.36)])
+ if test -f "$1/include/pcmcia/cs_types.h"; then
+ AC_MSG_RESULT([yes])
+ $2
+ else
+ AC_MSG_RESULT([no])
+ $3
+ fi
+])
+
+# COMEDI_CHECK_HAVE_CS_H([LINUX_SOURCE_PATH], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------------------------
+#
+# Check if kernel has <pcmcia/cs.h> file.
+AC_DEFUN([COMEDI_CHECK_HAVE_CS_H],
+[
+ AC_MSG_CHECKING([$1 for include/pcmcia/cs.h (removed in 2.6.37)])
+ if test -f "$1/include/pcmcia/cs.h"; then
+ AC_MSG_RESULT([yes])
+ $2
+ else
+ AC_MSG_RESULT([no])
+ $3
+ fi
+])
+
+# COMEDI_CHECK_HAVE_MUTEX_H([LINUX_SOURCE_PATH], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------------------------
+#
+# Check if kernel has <linux/mutex.h> file.
+AC_DEFUN([COMEDI_CHECK_HAVE_MUTEX_H],
+[
+ AC_MSG_CHECKING([$1 for include/linux/mutex.h])
+ if test -f "$1/include/linux/mutex.h"; then
+ AC_MSG_RESULT([yes])
+ $2
+ else
+ AC_MSG_RESULT([no])
+ $3
+ fi
+])
+
+# COMEDI_CHECK_HAVE_LINUX_SEMAPHORE_H([LINUX_SOURCE_PATH], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+# -------------------------------------------------------------
+#
+# Check if kernel has <linux/semaphore.h> file.
+AC_DEFUN([COMEDI_CHECK_HAVE_LINUX_SEMAPHORE_H],
+[
+ AC_MSG_CHECKING([$1 for include/linux/semaphore.h])
+ if test -f "$1/include/linux/semaphore.h"; then
+ AC_MSG_RESULT([yes])
+ $2
+ else
+ AC_MSG_RESULT([no])
+ $3
+ fi
+])
+
+# COMEDI_CHECK_HAVE_GENERIC_BOOL_TYPE([LINUX_SOURCE_PATH], [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+#
+# -------------------------------------------------------------
+# Check if kernel is new enough to have generic 'bool' type in <linux/types.h>
+# and 'false' and 'true' enum constants in <linux/stddef.h>. This was added
+# in vanilla 2.6.19, but backported to RHEL5 2.6.18.
+AC_DEFUN([COMEDI_CHECK_HAVE_GENERIC_BOOL_TYPE],
+[
+ AC_MSG_CHECKING([$1 for 'bool' in include/linux/types.h])
+ if grep -q 'bool;' "$1/include/linux/types.h" 2>/dev/null; then
+ AC_MSG_RESULT([yes])
+ $2
+ else
+ AC_MSG_RESULT([no])
+ $3
+ fi
+])
projects / comedi.git / blobdiff