config/zfs-build.m4

   1 AC_DEFUN([ZFS_AC_CONFIG], [
   2
   3         AC_ARG_WITH([zfs-config],
   4                 AS_HELP_STRING([--with-config=CONFIG],
   5                 [Config file 'kernel|user|lustre']),
   6                 [zfsconfig="$withval"])
   7
   8         AC_MSG_CHECKING([zfs config file])
   9         if test -z "$zfsconfig" || test ! -r config/$zfsconfig; then
  10                 AC_MSG_RESULT([no])
  11                 AC_MSG_ERROR([
  12                 *** Please specify one of the valid config files located
  13                 *** in ./config/ with the '--with-zfs-config=CONFIG' option])
  14         fi
  15
  16         AC_MSG_RESULT([$zfsconfig]);
  17         . ./config/$zfsconfig
  18
  19         TOPDIR=`/bin/pwd`
  20         ZFSDIR=${TOPDIR}/$BUILDDIR
  21         LIBDIR=$ZFSDIR/lib
  22         CMDDIR=$ZFSDIR/zcmd
  23
  24         AC_SUBST(TOPDIR)
  25         AC_SUBST(ZFSDIR)
  26         AC_SUBST(LIBDIR)
  27         AC_SUBST(CMDDIR)
  28 ])
  29
  30 AC_DEFUN([ZFS_AC_KERNEL], [
  31         ver=`uname -r`
  32
  33         AC_ARG_WITH([linux],
  34                 AS_HELP_STRING([--with-linux=PATH],
  35                 [Path to kernel source]),
  36                 [kernelsrc="$withval"; kernelbuild="$withval"])
  37
  38         AC_ARG_WITH(linux-obj,
  39                 AS_HELP_STRING([--with-linux-obj=PATH],
  40                 [Path to kernel build objects]),
  41                 [kernelbuild="$withval"])
  42
  43         AC_MSG_CHECKING([kernel source directory])
  44         if test -z "$kernelsrc"; then
  45                 kernelbuild=
  46                 sourcelink=/lib/modules/${ver}/source
  47                 buildlink=/lib/modules/${ver}/build
  48
  49                 if test -e $sourcelink; then
  50                         kernelsrc=`(cd $sourcelink; /bin/pwd)`
  51                 fi
  52                 if test -e $buildlink; then
  53                         kernelbuild=`(cd $buildlink; /bin/pwd)`
  54                 fi
  55                 if test -z "$kernelsrc"; then
  56                         kernelsrc=$kernelbuild
  57                 fi
  58                 if test -z "$kernelsrc" -o -z "$kernelbuild"; then
  59                         AC_MSG_RESULT([Not found])
  60                         AC_MSG_ERROR([
  61                         *** Please specify the location of the kernel source
  62                         *** with the '--with-linux=PATH' option])
  63                 fi
  64         fi
  65
  66         AC_MSG_RESULT([$kernelsrc])
  67         AC_MSG_CHECKING([kernel build directory])
  68         AC_MSG_RESULT([$kernelbuild])
  69
  70         AC_MSG_CHECKING([kernel source version])
  71         if test -r $kernelbuild/include/linux/version.h &&
  72                 fgrep -q UTS_RELEASE $kernelbuild/include/linux/version.h; then
  73
  74                 kernsrcver=`(echo "#include <linux/version.h>";
  75                              echo "kernsrcver=UTS_RELEASE") |
  76                              cpp -I $kernelbuild/include |
  77                              grep "^kernsrcver=" | cut -d \" -f 2`
  78
  79         elif test -r $kernelbuild/include/linux/utsrelease.h &&
  80                 fgrep -q UTS_RELEASE $kernelbuild/include/linux/utsrelease.h; then
  81
  82                 kernsrcver=`(echo "#include <linux/utsrelease.h>";
  83                              echo "kernsrcver=UTS_RELEASE") |
  84                              cpp -I $kernelbuild/include |
  85                              grep "^kernsrcver=" | cut -d \" -f 2`
  86         fi
  87
  88         if test -z "$kernsrcver"; then
  89                 AC_MSG_RESULT([Not found])
  90                 AC_MSG_ERROR([
  91                 *** Cannot determine the version of the linux kernel source.
  92                 *** Please prepare the kernel before running this script])
  93         fi
  94
  95         AC_MSG_RESULT([$kernsrcver])
  96
  97         kmoduledir=${INSTALL_MOD_PATH}/lib/modules/$kernsrcver
  98         LINUX=${kernelsrc}
  99         LINUX_OBJ=${kernelbuild}
 100
 101         AC_SUBST(LINUX)
 102         AC_SUBST(LINUX_OBJ)
 103         AC_SUBST(kmoduledir)
 104 ])
 105
 106 AC_DEFUN([ZFS_AC_SPL], [
 107
 108         AC_ARG_WITH([spl],
 109                 AS_HELP_STRING([--with-spl=PATH],
 110                 [Path to spl source]),
 111                 [splsrc="$withval"; splbuild="$withval"])
 112
 113         AC_ARG_WITH([spl-obj],
 114                 AS_HELP_STRING([--with-spl-obj=PATH],
 115                 [Path to spl build objects]),
 116                 [splbuild="$withval"])
 117
 118
 119         AC_MSG_CHECKING([spl source directory])
 120         if test -z "$splsrc"; then
 121                 splbuild=
 122                 sourcelink=/tmp/`whoami`/spl
 123                 buildlink=/tmp/`whoami`/spl
 124
 125                 if test -e $sourcelink; then
 126                         splsrc=`(cd $sourcelink; /bin/pwd)`
 127                 fi
 128                 if test -e $buildlink; then
 129                         splbuild=`(cd $buildlink; /bin/pwd)`
 130                 fi
 131                 if test -z "$splsrc"; then
 132                         splsrc=$splbuild
 133                 fi
 134         fi
 135
 136         if test -z "$splsrc" -o -z "$splbuild"; then
 137                 sourcelink=/lib/modules/${ver}/source
 138                 buildlink=/lib/modules/${ver}/build
 139
 140                 if test -e $sourcelink; then
 141                         splsrc=`(cd $sourcelink; /bin/pwd)`
 142                 fi
 143                 if test -e $buildlink; then
 144                         splbuild=`(cd $buildlink; /bin/pwd)`
 145                 fi
 146                 if test -z "$splsrc"; then
 147                         splsrc=$splbuild
 148                 fi
 149                 if test -z "$splsrc" -o -z "$splbuild"; then
 150                         AC_MSG_RESULT([Not found])
 151                         AC_MSG_ERROR([
 152                         *** Please specify the location of the spl source
 153                         *** with the '--with-spl=PATH' option])
 154                 fi
 155         fi
 156
 157         AC_MSG_RESULT([$splsrc])
 158         AC_MSG_CHECKING([spl build directory])
 159         AC_MSG_RESULT([$splbuild])
 160
 161         AC_MSG_CHECKING([spl source version])
 162         if test -r $splbuild/spl_config.h &&
 163                 fgrep -q VERSION $splbuild/spl_config.h; then
 164
 165                 splsrcver=`(echo "#include <spl_config.h>";
 166                             echo "splsrcver=VERSION") |
 167                             cpp -I $splbuild |
 168                             grep "^splsrcver=" | cut -d \" -f 2`
 169         fi
 170
 171         if test -z "$splsrcver"; then
 172                 AC_MSG_RESULT([Not found])
 173                 AC_MSG_ERROR([
 174                 *** Cannot determine the version of the spl source.
 175                 *** Please prepare the spl source before running this script])
 176         fi
 177
 178         AC_MSG_RESULT([$splsrcver])
 179
 180         AC_MSG_CHECKING([spl Module.symvers])
 181         if test -r $splbuild/modules/Module.symvers; then
 182                 splsymvers=$splbuild/modules/Module.symvers
 183         elif test -r $kernelbuild/Module.symvers; then
 184                 splsymvers=$kernelbuild/Module.symvers
 185         fi
 186
 187         if test -z "$splsymvers"; then
 188                 AC_MSG_RESULT([Not found])
 189                 AC_MSG_ERROR([
 190                 *** Cannot find extra Module.symvers in the spl source.
 191                 *** Please prepare the spl source before running this script])
 192         fi
 193
 194         AC_MSG_RESULT([$splsymvers])
 195         AC_SUBST(splsrc)
 196         AC_SUBST(splsymvers)
 197 ])
 198
 199 AC_DEFUN([ZFS_AC_LICENSE], [
 200         AC_MSG_CHECKING([license])
 201         AC_MSG_RESULT([CDDL])
 202 dnl #        AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
 203 dnl #                [Define to 1 if module is licensed under the GPL])
 204 ])
 205
 206 AC_DEFUN([ZFS_AC_DEBUG], [
 207         AC_MSG_CHECKING([whether debugging is enabled])
 208         AC_ARG_ENABLE( [debug],
 209                 AS_HELP_STRING([--enable-debug],
 210                 [Enable generic debug support (default off)]),
 211                 [ case "$enableval" in
 212                         yes) zfs_ac_debug=yes ;;
 213                         no)  zfs_ac_debug=no  ;;
 214                         *) AC_MSG_RESULT([Error!])
 215                         AC_MSG_ERROR([Bad value "$enableval" for --enable-debug]) ;;
 216                 esac ]
 217         )
 218         if test "$zfs_ac_debug" = yes; then
 219                 AC_MSG_RESULT([yes])
 220                 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG "
 221                 HOSTCFLAGS="${HOSTCFLAGS} -DDEBUG "
 222         else
 223                 AC_MSG_RESULT([no])
 224                 AC_DEFINE([NDEBUG], [1],
 225                 [Define to 1 to disable debug tracing])
 226                 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG "
 227                 HOSTCFLAGS="${HOSTCFLAGS} -DNDEBUG "
 228         fi
 229 ])
 230
 231 AC_DEFUN([ZFS_AC_SCRIPT_CONFIG], [
 232         SCRIPT_CONFIG=.script-config
 233         rm -f ${SCRIPT_CONFIG}
 234         echo "KERNELSRC=${LINUX}"         >>${SCRIPT_CONFIG}
 235         echo "KERNELBUILD=${LINUX_OBJ}"   >>${SCRIPT_CONFIG}
 236         echo "KERNELSRCVER=$kernsrcver"   >>${SCRIPT_CONFIG}
 237         echo                              >>${SCRIPT_CONFIG}
 238         echo "SPLSRC=$splsrc"             >>${SCRIPT_CONFIG}
 239         echo "SPLBUILD=$splbuild"         >>${SCRIPT_CONFIG}
 240         echo "SPLSRCVER=$splsrcver"       >>${SCRIPT_CONFIG}
 241         echo "SPLSYMVERS=$splsymvers"     >>${SCRIPT_CONFIG}
 242         echo                              >>${SCRIPT_CONFIG}
 243         echo "ZFSSRC=${TOPDIR}/src"       >>${SCRIPT_CONFIG}
 244         echo "ZFSBUILD=${ZFSDIR}"         >>${SCRIPT_CONFIG}
 245         echo                              >>${SCRIPT_CONFIG}
 246         echo "TOPDIR=${TOPDIR}            >>${SCRIPT_CONFIG}
 247         echo "LIBDIR=${LIBDIR}            >>${SCRIPT_CONFIG}
 248         echo "CMDDIR=${CMDDIR}            >>${SCRIPT_CONFIG}
 249 ])
 250
 251 dnl #
 252 dnl # ZFS_LINUX_CONFTEST
 253 dnl #
 254 AC_DEFUN([ZFS_LINUX_CONFTEST], [
 255 cat >conftest.c <<_ACEOF
 256 $1
 257 _ACEOF
 258 ])
 259
 260 dnl #
 261 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
 262 dnl #
 263 m4_define([ZFS_LANG_PROGRAM], [
 264 $1
 265 int
 266 main (void)
 267 {
 268 dnl Do *not* indent the following line: there may be CPP directives.
 269 dnl Don't move the `;' right after for the same reason.
 270 $2
 271   ;
 272   return 0;
 273 }
 274 ])
 275
 276 dnl #
 277 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
 278 dnl #
 279 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
 280 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])dnl
 281 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 282 echo "obj-m := conftest.o" >build/Makefile
 283 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])],
 284 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])],
 285         [$4],
 286         [_AC_MSG_LOG_CONFTEST
 287 m4_ifvaln([$5],[$5])dnl])dnl
 288 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
 289 ])
 290
 291 dnl #
 292 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
 293 dnl #
 294 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
 295         [ZFS_LINUX_COMPILE_IFELSE(
 296         [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
 297         [modules],
 298         [test -s build/conftest.o],
 299         [$3], [$4])
 300 ])
 301
 302 dnl #
 303 dnl # ZFS_LINUX_CONFIG
 304 dnl #
 305 AC_DEFUN([ZFS_LINUX_CONFIG],
 306         [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
 307         ZFS_LINUX_TRY_COMPILE([
 308                 #ifndef AUTOCONF_INCLUDED
 309                 #include <linux/config.h>
 310                 #endif
 311         ],[
 312                 #ifndef CONFIG_$1
 313                 #error CONFIG_$1 not #defined
 314                 #endif
 315         ],[
 316                 AC_MSG_RESULT([yes])
 317                 $2
 318         ],[
 319                 AC_MSG_RESULT([no])
 320                 $3
 321         ])
 322 ])
 323
 324 dnl #
 325 dnl # ZFS_CHECK_SYMBOL_EXPORT
 326 dnl # check symbol exported or not
 327 dnl #
 328 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT],
 329         [AC_MSG_CHECKING([whether symbol $1 is exported])
 330         grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/Module.symvers 2>/dev/null
 331         rc=$?
 332         if test $rc -ne 0; then
 333                 export=0
 334                 for file in $2; do
 335                         grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null
 336                         rc=$?
 337                         if test $rc -eq 0; then
 338                                 export=1
 339                                 break;
 340                         fi
 341                 done
 342                 if test $export -eq 0; then
 343                         AC_MSG_RESULT([no])
 344                         $4
 345                 else
 346                         AC_MSG_RESULT([yes])
 347                         $3
 348                 fi
 349         else
 350                 AC_MSG_RESULT([yes])
 351                 $3
 352         fi
 353 ])
 354
 355 dnl #
 356 dnl # 2.6.x API change
 357 dnl # bio_end_io_t uses 2 args (size was dropped from prototype)
 358 dnl #
 359 AC_DEFUN([ZFS_AC_2ARGS_BIO_END_IO_T],
 360         [AC_MSG_CHECKING([whether bio_end_io_t wants 2 args])
 361         tmp_flags="$EXTRA_KCFLAGS"
 362         EXTRA_KCFLAGS="-Werror"
 363         ZFS_LINUX_TRY_COMPILE([
 364                 #include <linux/bio.h>
 365         ],[
 366                 void (*wanted_end_io)(struct bio *, int) = NULL;
 367                 bio_end_io_t *local_end_io;
 368
 369                 local_end_io = wanted_end_io;
 370         ],[
 371                 AC_MSG_RESULT(yes)
 372                 AC_DEFINE(HAVE_2ARGS_BIO_END_IO_T, 1,
 373                           [bio_end_io_t wants 2 args])
 374         ],[
 375                 AC_MSG_RESULT(no)
 376         ])
 377         EXTRA_KCFLAGS="$tmp_flags"
 378 ])