config/zfs-build.m4

   1 AC_DEFUN([ZFS_AC_CONFIG], [
   2
   3         TOPDIR=`/bin/pwd`
   4         BUILDDIR=$ZFS_META_NAME #+$zfsconfig
   5         ZFSDIR=$TOPDIR/$BUILDDIR
   6         LIBDIR=$ZFSDIR/lib
   7         CMDDIR=$ZFSDIR/zcmd
   8         UNAME=`uname -r | cut -d- -f1`
   9
  10         AC_SUBST(UNAME)
  11         AC_SUBST(TOPDIR)
  12         AC_SUBST(BUILDDIR)
  13         AC_SUBST(ZFSDIR)
  14         AC_SUBST(LIBDIR)
  15         AC_SUBST(CMDDIR)
  16         AC_SUBST(UNAME)
  17
  18         AC_ARG_WITH([zfs-config],
  19                 AS_HELP_STRING([--with-config=CONFIG],
  20                 [Config file 'kernel|user|lustre']),
  21                 [zfsconfig="$withval"])
  22
  23         AC_MSG_CHECKING([zfs config file])
  24
  25         [ case "$zfsconfig" in
  26                 kernel) ZFS_AC_KERNEL_CONFIG ;;
  27                 user)   ZFS_AC_USER_CONFIG ;;
  28                 lustre) ZFS_AC_LUSTRE_CONFIG ;;
  29                 *)
  30                 AC_MSG_RESULT([Error!])
  31                 AC_MSG_ERROR([Bad value "$zfsconfig" for --with-config,
  32                               user kernel|user|lustre]) ;;
  33         esac ]
  34
  35         AC_MSG_RESULT([$zfsconfig]);
  36 ])
  37
  38 AC_DEFUN([ZFS_AC_KERNEL], [
  39         ver=`uname -r`
  40
  41         AC_ARG_WITH([linux],
  42                 AS_HELP_STRING([--with-linux=PATH],
  43                 [Path to kernel source]),
  44                 [kernelsrc="$withval"; kernelbuild="$withval"])
  45
  46         AC_ARG_WITH(linux-obj,
  47                 AS_HELP_STRING([--with-linux-obj=PATH],
  48                 [Path to kernel build objects]),
  49                 [kernelbuild="$withval"])
  50
  51         AC_MSG_CHECKING([kernel source directory])
  52         if test -z "$kernelsrc"; then
  53                 kernelbuild=
  54                 sourcelink=/lib/modules/${ver}/source
  55                 buildlink=/lib/modules/${ver}/build
  56
  57                 if test -e $sourcelink; then
  58                         kernelsrc=`(cd $sourcelink; /bin/pwd)`
  59                 fi
  60                 if test -e $buildlink; then
  61                         kernelbuild=`(cd $buildlink; /bin/pwd)`
  62                 fi
  63                 if test -z "$kernelsrc"; then
  64                         kernelsrc=$kernelbuild
  65                 fi
  66                 if test -z "$kernelsrc" -o -z "$kernelbuild"; then
  67                         AC_MSG_RESULT([Not found])
  68                         AC_MSG_ERROR([
  69                         *** Please specify the location of the kernel source
  70                         *** with the '--with-linux=PATH' option])
  71                 fi
  72         fi
  73
  74         AC_MSG_RESULT([$kernelsrc])
  75         AC_MSG_CHECKING([kernel build directory])
  76         AC_MSG_RESULT([$kernelbuild])
  77
  78         AC_MSG_CHECKING([kernel source version])
  79         if test -r $kernelbuild/include/linux/version.h &&
  80                 fgrep -q UTS_RELEASE $kernelbuild/include/linux/version.h; then
  81
  82                 kernsrcver=`(echo "#include <linux/version.h>";
  83                              echo "kernsrcver=UTS_RELEASE") |
  84                              cpp -I $kernelbuild/include |
  85                              grep "^kernsrcver=" | cut -d \" -f 2`
  86
  87         elif test -r $kernelbuild/include/linux/utsrelease.h &&
  88                 fgrep -q UTS_RELEASE $kernelbuild/include/linux/utsrelease.h; then
  89
  90                 kernsrcver=`(echo "#include <linux/utsrelease.h>";
  91                              echo "kernsrcver=UTS_RELEASE") |
  92                              cpp -I $kernelbuild/include |
  93                              grep "^kernsrcver=" | cut -d \" -f 2`
  94         fi
  95
  96         if test -z "$kernsrcver"; then
  97                 AC_MSG_RESULT([Not found])
  98                 AC_MSG_ERROR([
  99                 *** Cannot determine the version of the linux kernel source.
 100                 *** Please prepare the kernel before running this script])
 101         fi
 102
 103         AC_MSG_RESULT([$kernsrcver])
 104
 105         kmoduledir=${INSTALL_MOD_PATH}/lib/modules/$kernsrcver
 106         LINUX=${kernelsrc}
 107         LINUX_OBJ=${kernelbuild}
 108
 109         AC_SUBST(LINUX)
 110         AC_SUBST(LINUX_OBJ)
 111         AC_SUBST(kmoduledir)
 112 ])
 113
 114 AC_DEFUN([ZFS_AC_SPL], [
 115
 116         AC_ARG_WITH([spl],
 117                 AS_HELP_STRING([--with-spl=PATH],
 118                 [Path to spl source]),
 119                 [splsrc="$withval"; splbuild="$withval"])
 120
 121         AC_ARG_WITH([spl-obj],
 122                 AS_HELP_STRING([--with-spl-obj=PATH],
 123                 [Path to spl build objects]),
 124                 [splbuild="$withval"])
 125
 126
 127         AC_MSG_CHECKING([spl source directory])
 128         if test -z "$splsrc"; then
 129                 splbuild=
 130                 sourcelink=/tmp/`whoami`/spl
 131                 buildlink=/tmp/`whoami`/spl
 132
 133                 if test -e $sourcelink; then
 134                         splsrc=`(cd $sourcelink; /bin/pwd)`
 135                 fi
 136                 if test -e $buildlink; then
 137                         splbuild=`(cd $buildlink; /bin/pwd)`
 138                 fi
 139                 if test -z "$splsrc"; then
 140                         splsrc=$splbuild
 141                 fi
 142         fi
 143
 144         if test -z "$splsrc" -o -z "$splbuild"; then
 145                 sourcelink=/lib/modules/${ver}/source
 146                 buildlink=/lib/modules/${ver}/build
 147
 148                 if test -e $sourcelink; then
 149                         splsrc=`(cd $sourcelink; /bin/pwd)`
 150                 fi
 151                 if test -e $buildlink; then
 152                         splbuild=`(cd $buildlink; /bin/pwd)`
 153                 fi
 154                 if test -z "$splsrc"; then
 155                         splsrc=$splbuild
 156                 fi
 157                 if test -z "$splsrc" -o -z "$splbuild"; then
 158                         AC_MSG_RESULT([Not found])
 159                         AC_MSG_ERROR([
 160                         *** Please specify the location of the spl source
 161                         *** with the '--with-spl=PATH' option])
 162                 fi
 163         fi
 164
 165         AC_MSG_RESULT([$splsrc])
 166         AC_MSG_CHECKING([spl build directory])
 167         AC_MSG_RESULT([$splbuild])
 168
 169         AC_MSG_CHECKING([spl source version])
 170         if test -r $splbuild/spl_config.h &&
 171                 fgrep -q VERSION $splbuild/spl_config.h; then
 172
 173                 splsrcver=`(echo "#include <spl_config.h>";
 174                             echo "splsrcver=VERSION") |
 175                             cpp -I $splbuild |
 176                             grep "^splsrcver=" | cut -d \" -f 2`
 177         fi
 178
 179         if test -z "$splsrcver"; then
 180                 AC_MSG_RESULT([Not found])
 181                 AC_MSG_ERROR([
 182                 *** Cannot determine the version of the spl source.
 183                 *** Please prepare the spl source before running this script])
 184         fi
 185
 186         AC_MSG_RESULT([$splsrcver])
 187
 188         AC_MSG_CHECKING([spl Module.symvers])
 189         if test -r $splbuild/modules/Module.symvers; then
 190                 splsymvers=$splbuild/modules/Module.symvers
 191         elif test -r $kernelbuild/Module.symvers; then
 192                 splsymvers=$kernelbuild/Module.symvers
 193         fi
 194
 195         if test -z "$splsymvers"; then
 196                 AC_MSG_RESULT([Not found])
 197                 AC_MSG_ERROR([
 198                 *** Cannot find extra Module.symvers in the spl source.
 199                 *** Please prepare the spl source before running this script])
 200         fi
 201
 202         AC_MSG_RESULT([$splsymvers])
 203         AC_SUBST(splsrc)
 204         AC_SUBST(splsymvers)
 205 ])
 206
 207 AC_DEFUN([ZFS_AC_LICENSE], [
 208         AC_MSG_CHECKING([license])
 209         AC_MSG_RESULT([CDDL])
 210 dnl #        AC_DEFINE([HAVE_GPL_ONLY_SYMBOLS], [1],
 211 dnl #                [Define to 1 if module is licensed under the GPL])
 212 ])
 213
 214 AC_DEFUN([ZFS_AC_DEBUG], [
 215         AC_MSG_CHECKING([whether debugging is enabled])
 216         AC_ARG_ENABLE( [debug],
 217                 AS_HELP_STRING([--enable-debug],
 218                 [Enable generic debug support (default off)]),
 219                 [ case "$enableval" in
 220                         yes) zfs_ac_debug=yes ;;
 221                         no)  zfs_ac_debug=no  ;;
 222                         *) AC_MSG_RESULT([Error!])
 223                         AC_MSG_ERROR([Bad value "$enableval" for --enable-debug]) ;;
 224                 esac ]
 225         )
 226         if test "$zfs_ac_debug" = yes; then
 227                 AC_MSG_RESULT([yes])
 228                 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DDEBUG "
 229                 HOSTCFLAGS="${HOSTCFLAGS} -DDEBUG "
 230         else
 231                 AC_MSG_RESULT([no])
 232                 AC_DEFINE([NDEBUG], [1],
 233                 [Define to 1 to disable debug tracing])
 234                 KERNELCPPFLAGS="${KERNELCPPFLAGS} -DNDEBUG "
 235                 HOSTCFLAGS="${HOSTCFLAGS} -DNDEBUG "
 236         fi
 237 ])
 238
 239 AC_DEFUN([ZFS_AC_SCRIPT_CONFIG], [
 240         SCRIPT_CONFIG=.script-config
 241         rm -f ${SCRIPT_CONFIG}
 242         echo "KERNELSRC=${LINUX}"         >>${SCRIPT_CONFIG}
 243         echo "KERNELBUILD=${LINUX_OBJ}"   >>${SCRIPT_CONFIG}
 244         echo "KERNELSRCVER=$kernsrcver"   >>${SCRIPT_CONFIG}
 245         echo                              >>${SCRIPT_CONFIG}
 246         echo "SPLSRC=$splsrc"             >>${SCRIPT_CONFIG}
 247         echo "SPLBUILD=$splbuild"         >>${SCRIPT_CONFIG}
 248         echo "SPLSRCVER=$splsrcver"       >>${SCRIPT_CONFIG}
 249         echo "SPLSYMVERS=$splsymvers"     >>${SCRIPT_CONFIG}
 250         echo                              >>${SCRIPT_CONFIG}
 251         echo "ZFSSRC=${TOPDIR}/src"       >>${SCRIPT_CONFIG}
 252         echo "ZFSBUILD=${ZFSDIR}"         >>${SCRIPT_CONFIG}
 253         echo                              >>${SCRIPT_CONFIG}
 254         echo "TOPDIR=${TOPDIR}"           >>${SCRIPT_CONFIG}
 255         echo "LIBDIR=${LIBDIR}"           >>${SCRIPT_CONFIG}
 256         echo "CMDDIR=${CMDDIR}"           >>${SCRIPT_CONFIG}
 257 ])
 258
 259 dnl #
 260 dnl # ZFS_LINUX_CONFTEST
 261 dnl #
 262 AC_DEFUN([ZFS_LINUX_CONFTEST], [
 263 cat >conftest.c <<_ACEOF
 264 $1
 265 _ACEOF
 266 ])
 267
 268 dnl #
 269 dnl # ZFS_LANG_PROGRAM(C)([PROLOGUE], [BODY])
 270 dnl #
 271 m4_define([ZFS_LANG_PROGRAM], [
 272 $1
 273 int
 274 main (void)
 275 {
 276 dnl Do *not* indent the following line: there may be CPP directives.
 277 dnl Don't move the `;' right after for the same reason.
 278 $2
 279   ;
 280   return 0;
 281 }
 282 ])
 283
 284 dnl #
 285 dnl # ZFS_LINUX_COMPILE_IFELSE / like AC_COMPILE_IFELSE
 286 dnl #
 287 AC_DEFUN([ZFS_LINUX_COMPILE_IFELSE], [
 288 m4_ifvaln([$1], [ZFS_LINUX_CONFTEST([$1])])dnl
 289 rm -f build/conftest.o build/conftest.mod.c build/conftest.ko build/Makefile
 290 echo "obj-m := conftest.o" >build/Makefile
 291 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])],
 292 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])],
 293         [$4],
 294         [_AC_MSG_LOG_CONFTEST
 295 m4_ifvaln([$5],[$5])dnl])dnl
 296 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
 297 ])
 298
 299 dnl #
 300 dnl # ZFS_LINUX_TRY_COMPILE like AC_TRY_COMPILE
 301 dnl #
 302 AC_DEFUN([ZFS_LINUX_TRY_COMPILE],
 303         [ZFS_LINUX_COMPILE_IFELSE(
 304         [AC_LANG_SOURCE([ZFS_LANG_PROGRAM([[$1]], [[$2]])])],
 305         [modules],
 306         [test -s build/conftest.o],
 307         [$3], [$4])
 308 ])
 309
 310 dnl #
 311 dnl # ZFS_LINUX_CONFIG
 312 dnl #
 313 AC_DEFUN([ZFS_LINUX_CONFIG],
 314         [AC_MSG_CHECKING([whether Linux was built with CONFIG_$1])
 315         ZFS_LINUX_TRY_COMPILE([
 316                 #ifndef AUTOCONF_INCLUDED
 317                 #include <linux/config.h>
 318                 #endif
 319         ],[
 320                 #ifndef CONFIG_$1
 321                 #error CONFIG_$1 not #defined
 322                 #endif
 323         ],[
 324                 AC_MSG_RESULT([yes])
 325                 $2
 326         ],[
 327                 AC_MSG_RESULT([no])
 328                 $3
 329         ])
 330 ])
 331
 332 dnl #
 333 dnl # ZFS_CHECK_SYMBOL_EXPORT
 334 dnl # check symbol exported or not
 335 dnl #
 336 AC_DEFUN([ZFS_CHECK_SYMBOL_EXPORT],
 337         [AC_MSG_CHECKING([whether symbol $1 is exported])
 338         grep -q -E '[[[:space:]]]$1[[[:space:]]]' $LINUX/Module.symvers 2>/dev/null
 339         rc=$?
 340         if test $rc -ne 0; then
 341                 export=0
 342                 for file in $2; do
 343                         grep -q -E "EXPORT_SYMBOL.*($1)" "$LINUX/$file" 2>/dev/null
 344                         rc=$?
 345                         if test $rc -eq 0; then
 346                                 export=1
 347                                 break;
 348                         fi
 349                 done
 350                 if test $export -eq 0; then
 351                         AC_MSG_RESULT([no])
 352                         $4
 353                 else
 354                         AC_MSG_RESULT([yes])
 355                         $3
 356                 fi
 357         else
 358                 AC_MSG_RESULT([yes])
 359                 $3
 360         fi
 361 ])
 362
 363 dnl #
 364 dnl # 2.6.x API change
 365 dnl # bio_end_io_t uses 2 args (size was dropped from prototype)
 366 dnl #
 367 AC_DEFUN([ZFS_AC_2ARGS_BIO_END_IO_T],
 368         [AC_MSG_CHECKING([whether bio_end_io_t wants 2 args])
 369         tmp_flags="$EXTRA_KCFLAGS"
 370         EXTRA_KCFLAGS="-Werror"
 371         ZFS_LINUX_TRY_COMPILE([
 372                 #include <linux/bio.h>
 373         ],[
 374                 void (*wanted_end_io)(struct bio *, int) = NULL;
 375                 bio_end_io_t *local_end_io;
 376
 377                 local_end_io = wanted_end_io;
 378         ],[
 379                 AC_MSG_RESULT(yes)
 380                 AC_DEFINE(HAVE_2ARGS_BIO_END_IO_T, 1,
 381                           [bio_end_io_t wants 2 args])
 382         ],[
 383                 AC_MSG_RESULT(no)
 384         ])
 385         EXTRA_KCFLAGS="$tmp_flags"
 386 ])