scripts/lttng-modules/param-build.sh

   1 #!/bin/bash -exu
   2 #
   3 # Copyright (C) 2016-2018 - Michael Jeanson <mjeanson@efficios.com>
   4 #
   5 # This program is free software: you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation, either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 # Parameters
  19 arch=${arch:-}
  20 cross_arch=${cross_arch:-}
  21 ktag=${ktag:-}
  22 kgitrepo=${kgitrepo:-}
  23 mversion=${mversion:-}
  24 mgitrepo=${mgitrepo:-}
  25
  26
  27 ## FUNCTIONS ##
  28
  29 # Kernel version compare functions
  30 verlte() {
  31     [  "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | head -n1)" ]
  32 }
  33
  34 verlt() {
  35     [ "$1" = "$2" ] && return 1 || verlte "$1" "$2"
  36 }
  37
  38 vergte() {
  39     [  "$1" = "$(printf '%s\n%s' "$1" "$2" | sort -V | tail -n1)" ]
  40 }
  41
  42 vergt() {
  43     [ "$1" = "$2" ] && return 1 || vergte "$1" "$2"
  44 }
  45
  46
  47 git_clone_modules_sources() {
  48     mkdir -p "$MODULES_GIT_DIR"
  49     git clone --depth=1 -b "${mversion}" "${mgitrepo}" "$MODULES_GIT_DIR"
  50 }
  51
  52 # Checkout a shallow kernel tree of the specified tag
  53 git_clone_linux_sources() {
  54     mkdir -p "$LINUX_GIT_DIR"
  55     git clone --depth=1 -b "${ktag}" --reference "$LINUX_GIT_REF_REPO_DIR" "${kgitrepo}" "$LINUX_GIT_DIR"
  56 }
  57
  58
  59 # Export the kernel sources from the git repo
  60 git_export_linux_sources() {
  61     cd "$LINUX_GIT_DIR"
  62     git archive "${ktag}" | tar -x -C "$LINUX_SRCOBJ_DIR"
  63 }
  64
  65
  66 # Upload the tar archive to the object store
  67 upload_archive_obj() {
  68     s3cmd -c "$WORKSPACE/.s3cfg" put "$WORKSPACE/$obj_name" "$obj_url_prefix/"
  69     rm -f "$WORKSPACE/$obj_name"
  70 }
  71
  72
  73 extract_archive_obj() {
  74     tar -xf "$WORKSPACE/$obj_name" -C "$LINUX_OBJ_DIR"
  75     rm -f "$WORKSPACE/$obj_name"
  76 }
  77
  78
  79 tar_archive_obj() {
  80     cd "$LINUX_OBJ_DIR"
  81     tar -cf "$WORKSPACE/$obj_name" -I pbzip2 .
  82     cd -
  83 }
  84
  85 # Find the most recent GCC version supported by the kernel sources
  86 select_compiler() {
  87     local selected_cc
  88
  89     cd "$LINUX_SRCOBJ_DIR"
  90
  91     kversion=$(make -s kernelversion)
  92
  93     set +e
  94
  95     for cc in gcc-7 gcc-5 gcc-4.8; do
  96       if "${CROSS_COMPILE:-}${cc}" -I include/ -D__LINUX_COMPILER_H -D__LINUX_COMPILER_TYPES_H -E include/linux/compiler-gcc.h; then
  97         selected_cc="$cc"
  98         break
  99       fi
 100     done
 101
 102     set -e
 103
 104     if [ "x$selected_cc" = "x" ]; then
 105       echo "Found no suitable compiler."
 106       exit 1
 107     fi
 108
 109     # Force gcc-4 for buggy kernel branches
 110     if { vergte "$kversion" "3.2" && verlt "$kversion" "3.3"; } || \
 111        { vergte "$kversion" "3.4" && verlt "$kversion" "3.5"; } || \
 112        { vergte "$kversion" "3.17" && verlt "$kversion" "3.18"; }; then
 113       selected_cc=gcc-4.8
 114     fi
 115
 116     case "$ktag" in
 117       Ubuntu*)
 118         if { vergte "$kversion" "3.13" && verlt "$kversion" "3.14"; }; then
 119           selected_cc=gcc-4.8
 120         fi
 121       ;;
 122     esac
 123
 124     if [ "$selected_cc" != "gcc-4.8" ]; then
 125         # Older kernel Makefiles do not expect the compiler to default to PIE
 126         KAFLAGS="-fno-pie"
 127         KCFLAGS="-fno-pie -no-pie"
 128         KCPPFLAGS="-fno-pie"
 129         export KAFLAGS KCFLAGS KCPPFLAGS
 130     fi
 131
 132     export CC="${CROSS_COMPILE:-}${selected_cc}"
 133
 134     cd -
 135 }
 136
 137
 138 build_linux_kernel() {
 139     cd "$LINUX_SRCOBJ_DIR"
 140
 141     kversion=$(make -s kernelversion)
 142
 143     # Generate kernel configuration
 144     case "$ktag" in
 145       Ubuntu*)
 146         if [ "${cross_arch}" = "powerpc" ]; then
 147           if vergte "${kversion}" "4.10"; then
 148             echo "Ubuntu removed big endian powerpc configuration from kernel >= 4.10. Don't try to build it."
 149             exit 0
 150           fi
 151         fi
 152         fakeroot debian/rules clean KW_DEFCONFIG_DIR=.
 153         fakeroot debian/rules genconfigs KW_DEFCONFIG_DIR=.
 154         cp CONFIGS/"${ubuntu_config}" .config
 155         ;;
 156       *)
 157         # Force 32bit build on i386, default is 64bit
 158         if [ "$arch" = "i386" ]; then
 159             export ARCH="i386"
 160         fi
 161
 162         # allyesconfig is mostly broken for kernels of the 2.6 series
 163         if verlt "$kversion" "3.0"; then
 164             vanilla_config="defconfig"
 165         fi
 166
 167         make "${vanilla_config}"
 168         ;;
 169     esac
 170
 171     # silentoldconfig was renamed in 4.19
 172     if vergte "$kversion" "4.19"; then
 173         update_conf_target="syncconfig"
 174     else
 175         update_conf_target="silentoldconfig"
 176     fi
 177
 178     # Fix 'defined(@array)' was removed from recent perl
 179     if [ -f "kernel/timeconst.pl" ]; then
 180       sed -i 's/defined(\@\(.*\))/@\1/' kernel/timeconst.pl
 181     fi
 182
 183     # Fix syntax of inline assembly which is confused with C++11 raw strings on gcc >= 5
 184     if [ "$CC" != "gcc-4.8" ]; then
 185       if [ -f "arch/x86/kvm/svm.c" ]; then
 186         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/svm.c
 187       fi
 188
 189       if [ -f "arch/x86/kvm/vmx.c" ]; then
 190         sed -i 's/ R"/ R "/g; s/"R"/" R "/g' arch/x86/kvm/vmx.c
 191       fi
 192     fi
 193
 194     # Fix a typo in v2.6.36.x
 195     if [ -f "arch/x86/kernel/entry_64.S" ]; then
 196       sed -i 's/END(do_hypervisor_callback)/END(xen_do_hypervisor_callback)/' arch/x86/kernel/entry_64.S
 197     fi
 198
 199     # Fix kernel < 3.0 with gcc >= 4.7
 200     if verlt "$kversion" "3.0"; then
 201       sed -i '/linux\/compiler.h/a #include <linux\/linkage.h> \/* For asmregparm *\/' arch/x86/include/asm/ptrace.h
 202       sed -i 's/extern long syscall_trace_enter/extern asmregparm long syscall_trace_enter/' arch/x86/include/asm/ptrace.h
 203       sed -i 's/extern void syscall_trace_leave/extern asmregparm void syscall_trace_leave/' arch/x86/include/asm/ptrace.h
 204       echo "header-y += linkage.h" >> include/linux/Kbuild
 205     fi
 206
 207     # GCC 4.8
 208     sed -i "s/CONFIG_CC_STACKPROTECTOR_STRONG=y/# CONFIG_CC_STACKPROTECTOR_STRONG is not set/g" .config
 209
 210     # Don't try to sign modules
 211     sed -i "s/CONFIG_MODULE_SIG=y/# CONFIG_MODULE_SIG is not set/g" .config
 212
 213     # Disable kernel stack frame correctness validation, introduced in 4.6.0 and currently fails
 214     sed -i "s/CONFIG_STACK_VALIDATION=y/# CONFIG_STACK_VALIDATION is not set/g" .config
 215
 216     # Cause problems with inline assembly on i386
 217     sed -i "s/CONFIG_DEBUG_SECTION_MISMATCH=y/# CONFIG_DEBUG_SECTION_MISMATCH is not set/g" .config
 218
 219     # IGBVF won't build with recent gcc on 2.6.38.x
 220     if { vergte "$kversion" "2.6.37" && verlt "$kversion" "2.6.38"; }; then
 221       sed -i "s/CONFIG_IGBVF=y/# CONFIG_IGBVF is not set/g" .config
 222     fi
 223
 224     # Set required options
 225     {
 226         echo "CONFIG_KPROBES=y";
 227         echo "CONFIG_FTRACE=y";
 228         echo "CONFIG_BLK_DEV_IO_TRACE=y";
 229         echo "CONFIG_TRACEPOINTS=y";
 230         echo "CONFIG_KALLSYMS_ALL=y";
 231     } >> .config
 232
 233     # Debug
 234     #cat .config
 235
 236     make "$update_conf_target" CC="$CC"
 237     make -j"$NPROC" CC="$CC"
 238
 239     krelease=$(make -s kernelrelease)
 240
 241     # Save the kernel and modules
 242     mkdir -p "$LINUX_INSTOBJ_DIR/boot"
 243     make INSTALL_MOD_PATH="$LINUX_INSTOBJ_DIR" INSTALL_MOD_STRIP=1 modules_install
 244     make INSTALL_PATH="$LINUX_INSTOBJ_DIR/boot" install
 245     rm -f "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source" "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/build"
 246     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 247     ln -s ../../../../sources "$LINUX_INSTOBJ_DIR/lib/modules/${krelease}/source"
 248 }
 249
 250
 251 extract_distro_headers() {
 252
 253     # Enter linux source dir
 254     cd "${LINUX_SRCOBJ_DIR}"
 255
 256
 257     # For RT kernels, copy version file
 258     if [ -s localversion-rt ]; then
 259         cp -a localversion-rt "${LINUX_HDROBJ_DIR}"
 260     fi
 261
 262     # Copy all Makefile related stuff
 263     find . -path './include/*' -prune \
 264         -o -path './scripts/*' -prune -o -type f \
 265         \( -name 'Makefile*' -o -name 'Kconfig*' -o -name 'Kbuild*' -o \
 266             -name '*.sh' -o -name '*.pl' -o -name '*.lds' \) \
 267         -print | cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 268
 269     # Copy base scripts and include dirs
 270     cp -a scripts include "${LINUX_HDROBJ_DIR}"
 271
 272     # Copy arch includes
 273     (find arch -name include -type d -print0 | \
 274         xargs -0 -n1 -i: find : -type f) | \
 275         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 276
 277     # Copy arch scripts
 278     (find arch -name scripts -type d -print0 | \
 279         xargs -0 -n1 -i: find : -type f) | \
 280         cpio -pd --preserve-modification-time "${LINUX_HDROBJ_DIR}"
 281
 282     # Cleanup scripts
 283     rm -f "${LINUX_HDROBJ_DIR}/scripts/*.o"
 284     rm -f "${LINUX_HDROBJ_DIR}/scripts/*/*.o"
 285
 286     # On powerpc this object is required to link modules
 287     if [ "${karch}" = "powerpc" ]; then
 288         cp -a --parents arch/powerpc/lib/crtsavres.[So] "${LINUX_HDROBJ_DIR}/"
 289     fi
 290
 291     # On arm64 between 4.13 and 1.15 this object is required to build with ftrace support
 292     if [ "${karch}" = "arm64" ]; then
 293         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 294             cp -a --parents arch/arm64/kernel/ftrace-mod.[So] "${LINUX_HDROBJ_DIR}/"
 295         fi
 296     fi
 297
 298     # Newer kernels need objtool to build modules when CONFIG_STACK_VALIDATION=y
 299     if [ -f tools/objtool/objtool ]; then
 300       cp -a --parents tools/objtool/objtool "${LINUX_HDROBJ_DIR}/"
 301     fi
 302
 303     if [ -f "arch/x86/kernel/macros.s" ]; then
 304       cp -a --parents arch/x86/kernel/macros.s "${LINUX_HDROBJ_DIR}/"
 305     fi
 306
 307     # Copy modules related stuff, if available
 308     if [ -s Module.symvers ]; then
 309         cp Module.symvers "${LINUX_HDROBJ_DIR}"
 310     fi
 311
 312     if [ -s System.map ]; then
 313         cp System.map "${LINUX_HDROBJ_DIR}"
 314     fi
 315
 316     if [ -s Module.markers ]; then
 317         cp Module.markers "${LINUX_HDROBJ_DIR}"
 318     fi
 319
 320     # Copy config file
 321     cp .config "${LINUX_HDROBJ_DIR}"
 322
 323     # Make sure the Makefile and version.h have a matching timestamp so that
 324     # external modules can be built
 325     if [ -s "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h" ]; then
 326         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/generated/uapi/linux/version.h"
 327     elif [ -s "${LINUX_HDROBJ_DIR}/include/linux/version.h" ]; then
 328         touch -r "${LINUX_HDROBJ_DIR}/Makefile" "${LINUX_HDROBJ_DIR}/include/linux/version.h"
 329     else
 330         echo "Missing version.h"
 331         exit 1
 332     fi
 333     touch -r "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/generated/autoconf.h"
 334
 335     # Copy .config to include/config/auto.conf so "make prepare" is unnecessary.
 336     cp "${LINUX_HDROBJ_DIR}/.config" "${LINUX_HDROBJ_DIR}/include/config/auto.conf"
 337
 338     # Finally clean the object files from the full source tree
 339     make clean
 340
 341     # And regen the modules support files
 342     make modules_prepare CC="$CC"
 343
 344     # On powerpc this object is required to link modules
 345     if [ "${karch}" = "powerpc" ]; then
 346         make arch/powerpc/lib/crtsavres.o CC="$CC"
 347     fi
 348
 349     # On arm64 between 4.13 and 4.15 this object is required to build with ftrace support
 350     if [ "${karch}" = "arm64" ]; then
 351         if [ -f "arch/arm64/kernel/ftrace-mod.S" ]; then
 352             make arch/arm64/kernel/ftrace-mod.o CC="$CC"
 353         fi
 354     fi
 355
 356     # Version specific tasks
 357     case "$ktag" in
 358       Ubuntu*)
 359         # Add Ubuntu ABI number to kernel headers, this is normally done by the packaging code
 360         ABINUM="$(echo "$ktag" | grep -P -o 'Ubuntu-(lts-)?.*-\K\d+(?=\..*)')"
 361         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> include/generated/utsrelease.h
 362         echo "#define UTS_UBUNTU_RELEASE_ABI $ABINUM" >> "${LINUX_HDROBJ_DIR}/include/generated/utsrelease.h"
 363         ;;
 364     esac
 365 }
 366
 367
 368 build_modules() {
 369
 370     local kdir="$1"
 371     local outdir="$2"
 372     local kversion
 373
 374     kversion=$(make -C "$LINUX_HDROBJ_DIR" -s kernelversion)
 375
 376     # Enter lttng-modules source dir
 377     cd "${MODULES_GIT_DIR}"
 378
 379     # kernels 3.10 to 3.10.13 and 3.11 to 3.11.2 introduce a deadlock in the
 380     # timekeeping subsystem. We want those build to fail.
 381     if { vergte "$kversion" "3.10" && verlte "$kversion" "3.10.13"; } || \
 382        { vergte "$kversion" "3.11" && verlte "$kversion" "3.11.2"; }; then
 383
 384         set +e
 385
 386         # Build modules
 387         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 CC="$CC"
 388
 389         set -e
 390
 391         # We expect this build to fail, if it doesn't, fail the job.
 392         if [ "$?" -eq 0 ]; then
 393             echo "This build should have failed."
 394             exit 1
 395         fi
 396
 397         # We have to publish at least one file or the build will fail
 398         echo "This kernel is broken, there is a deadlock in the timekeeping subsystem." > "${outdir}/BROKEN.txt.ko"
 399
 400         set -e
 401
 402         KERNELDIR="${kdir}" make clean
 403
 404     else # Regular build
 405
 406         # Build modules against full kernel sources
 407         KERNELDIR="${kdir}" make -j"${NPROC}" V=1 CC="$CC"
 408
 409         # Install modules to build dir
 410         KERNELDIR="${kdir}" make INSTALL_MOD_PATH="${outdir}" modules_install
 411
 412         # Clean build dir
 413         KERNELDIR="${kdir}" make clean
 414     fi
 415 }
 416
 417
 418 ## MAIN ##
 419
 420 # Use all CPU cores
 421 NPROC=$(nproc)
 422
 423 MODULES_GIT_DIR="${WORKSPACE}/src/lttng-modules"
 424 LINUX_GIT_DIR="${WORKSPACE}/src/linux"
 425
 426 LINUX_OBJ_DIR="${WORKSPACE}/linux"
 427 LINUX_SRCOBJ_DIR="${LINUX_OBJ_DIR}/sources"
 428 LINUX_HDROBJ_DIR="${LINUX_OBJ_DIR}/headers"
 429 LINUX_INSTOBJ_DIR="${LINUX_OBJ_DIR}/install"
 430
 431 MODULES_OUTPUT_KSRC_DIR="${WORKSPACE}/build/lttng-modules-ksrc"
 432 MODULES_OUTPUT_KHDR_DIR="${WORKSPACE}/build/lttng-modules-khdr"
 433
 434 LINUX_GIT_REF_REPO_DIR="$HOME/gitcache/linux-stable.git/"
 435
 436 OBJ_STORE_URL="s3://jenkins"
 437
 438 cd "$WORKSPACE"
 439
 440 # Create build directories
 441 mkdir -p "${LINUX_SRCOBJ_DIR}" "${LINUX_HDROBJ_DIR}" "${LINUX_INSTOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
 442
 443 git_clone_modules_sources
 444
 445 # Setup cross compile env if available
 446 if [ "x${cross_arch}" != "x" ]; then
 447
 448     case "$cross_arch" in
 449         "armhf")
 450             karch="arm"
 451             cross_compile="arm-linux-gnueabihf-"
 452             vanilla_config="allyesconfig"
 453             ubuntu_config="armhf-config.flavour.generic"
 454             ;;
 455
 456         "arm64")
 457             karch="arm64"
 458             cross_compile="aarch64-linux-gnu-"
 459             vanilla_config="allyesconfig"
 460             ubuntu_config="arm64-config.flavour.generic"
 461             ;;
 462
 463         "powerpc")
 464             karch="powerpc"
 465             cross_compile="powerpc-linux-gnu-"
 466             vanilla_config="ppc44x_defconfig"
 467             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 468             ;;
 469
 470         "ppc64el")
 471             karch="powerpc"
 472             cross_compile="powerpc64le-linux-gnu-"
 473             vanilla_config="pseries_le_defconfig"
 474             ubuntu_config="ppc64el-config.flavour.generic"
 475             ;;
 476
 477         *)
 478             echo "Unsupported cross arch $cross_arch"
 479             exit 1
 480             ;;
 481     esac
 482
 483     # Export variables used by Kbuild for cross compilation
 484     export ARCH="${karch}"
 485     export CROSS_COMPILE="${cross_compile}"
 486
 487 # Set arch specific values if we are not cross compiling
 488 elif [ "x${arch}" != "x" ]; then
 489
 490     case "$arch" in
 491         "i386")
 492             karch="x86"
 493             vanilla_config="allyesconfig"
 494             ubuntu_config="i386-config.flavour.generic"
 495             ;;
 496
 497         "amd64")
 498             karch="x86"
 499             vanilla_config="allyesconfig"
 500             ubuntu_config="amd64-config.flavour.generic"
 501             ;;
 502
 503         "armhf")
 504             karch="arm"
 505             vanilla_config="allyesconfig"
 506             ubuntu_config="armhf-config.flavour.generic"
 507             ;;
 508
 509         "arm64")
 510             karch="arm64"
 511             vanilla_config="allyesconfig"
 512             ubuntu_config="arm64-config.flavour.generic"
 513             ;;
 514
 515         "powerpc")
 516             karch="powerpc"
 517             vanilla_config="allyesconfig"
 518             ubuntu_config="powerpc-config.flavour.powerpc-smp"
 519             ;;
 520
 521         "ppc64el")
 522             karch="powerpc"
 523             vanilla_config="allyesconfig"
 524             ubuntu_config="ppc64el-config.flavour.generic"
 525             ;;
 526
 527         *)
 528             echo "Unsupported arch $arch"
 529             exit 1
 530             ;;
 531     esac
 532 else
 533     echo "Not arch or cross_arch specified"
 534     exit 1
 535 fi
 536
 537
 538
 539 # First get the kernel build from the object store, or build it, if it's
 540 # not available.
 541
 542 echo "# Setup endpoint
 543 host_base = obj.internal.efficios.com
 544 host_bucket = obj.internal.efficios.com
 545 bucket_location = us-east-1
 546 use_https = True
 547
 548 # Setup access keys
 549 access_key = jenkins
 550 secret_key = echo123456
 551
 552 # Enable S3 v4 signature APIs
 553 signature_v2 = False" > "$WORKSPACE/.s3cfg"
 554
 555 url_hash="$(echo -n "$kgitrepo/$ktag/$arch/$cross_arch" | md5sum | awk '{ print $1 }')"
 556 obj_name="linux.tar.bz2"
 557 obj_url_prefix="$OBJ_STORE_URL/linux-build/$url_hash"
 558 obj_url="$obj_url_prefix/$obj_name"
 559
 560 set +e
 561 s3cmd -c "$WORKSPACE/.s3cfg" get "$obj_url"
 562 ret=$?
 563 set -e
 564
 565 case "$ret" in
 566     "0")
 567       extract_archive_obj
 568       ;;
 569
 570     "12")
 571       echo "File not found"
 572
 573       # Build all the things and upload
 574       # then finish the module build...
 575
 576       git_clone_linux_sources
 577       git_export_linux_sources
 578
 579       select_compiler
 580
 581       ## PREPARE FULL LINUX SOURCE TREE
 582       build_linux_kernel
 583
 584       ## EXTRACT DISTRO STYLE KERNEL HEADERS / DEVEL
 585       extract_distro_headers
 586
 587       tar_archive_obj
 588
 589       upload_archive_obj
 590
 591       ;;
 592
 593     *)
 594       echo "Unknown error? Abort"
 595       exit 1
 596       ;;
 597 esac
 598
 599 select_compiler
 600
 601 ## BUILD modules
 602 # Either we downloaded a pre-build kernel or we built it and uploaded
 603 # the archive for future builds.
 604
 605 cd "$WORKSPACE"
 606
 607 # Build modules against full kernel sources
 608 build_modules "${LINUX_SRCOBJ_DIR}" "${MODULES_OUTPUT_KSRC_DIR}"
 609
 610 # Build modules against kernel headers
 611 build_modules "${LINUX_HDROBJ_DIR}" "${MODULES_OUTPUT_KHDR_DIR}"
 612
 613 # Make sure some modules were actually built
 614 tree "${MODULES_OUTPUT_KSRC_DIR}"
 615 if [ "x$(find "${MODULES_OUTPUT_KSRC_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
 616   echo "No modules built!"
 617   exit 1
 618 fi
 619
 620 tree "${MODULES_OUTPUT_KHDR_DIR}"
 621 if [ "x$(find "${MODULES_OUTPUT_KHDR_DIR}" -name '*.ko*' -printf yes -quit)" != "xyes" ]; then
 622   echo "No modules built!"
 623   exit 1
 624 fi
 625
 626 # EOF