Centos 7, zfs 0.7.6 build dkms failes with kernel-ml 4.15.2-1.el7.elrepo

[rmeichsner]

System information

Type	CentOS Linux release 7.4.1708 (Core)
Distribution Name	CentOS
Distribution Version	7.4.1708
Linux Kernel	kernel-ml 4.15.2-1
Architecture	x64
ZFS Version	0.7.6-1.el7_3
SPL Version	0.7.6-1.el7_3

Describe the problem you're observing

DKMS SPL Module failes to build

Describe how to reproduce the problem

dkms build -m spl -v 0.7.6 spl failes with error

Include any warning/errors/backtraces from the system logs

Error:

checking whether basic kmem accounting is enabled... no
checking whether detailed kmem tracking is enabled... no
checking whether modules can be built... no
configure: error: *** Unable to build an empty module.

Building module:
cleaning build area...(bad exit status: 2)
make -j4 KERNELRELEASE=4.15.2-1.el7.elrepo.x86_64...(bad exit status: 2)
Error! Bad return status for module build on kernel: 4.15.2-1.el7.elrepo.x86_64 (x86_64)
Consult /var/lib/dkms/spl/0.7.6/build/make.log for more information.

Build Log /var/lib/dkms/spl/0.7.6/build/config.log shows the following error message:

configure:12610: checking whether modules can be built
configure:12633: cp conftest.c build && make modules -C /lib/modules/4.15.2-1.el7.elrepo.x86_64/b
uild EXTRA_CFLAGS=-Werror-implicit-function-declaration   M=/var/lib/dkms/spl/0.7.6/build/build
make[1]: *** No rule to make target `tools/objtool/objtool', needed by `/var/lib/dkms/spl/0.7.6/b
uild/build/conftest.o'.  Stop.
make: *** [_module_/var/lib/dkms/spl/0.7.6/build/build] Error 2
configure:12636: $? = 2
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "spl"
| #define PACKAGE_TARNAME "spl"
| #define PACKAGE_VERSION "0.7.6"
| #define PACKAGE_STRING "spl 0.7.6"
| #define PACKAGE_BUGREPORT ""
| #define PACKAGE_URL ""
| #define SPL_META_NAME "spl"
| #define SPL_META_VERSION "0.7.6"
| #define SPL_META_RELEASE "1"
| #define SPL_META_LICENSE "GPL"
| #define SPL_META_ALIAS "spl-0.7.6-1"
| #define SPL_META_AUTHOR "OpenZFS on Linux"
| #define PACKAGE "spl"
| #define VERSION "0.7.6"
| #define STDC_HEADERS 1
| #define HAVE_SYS_TYPES_H 1
| #define HAVE_SYS_STAT_H 1
| #define HAVE_STDLIB_H 1
| #define HAVE_STRING_H 1
| #define HAVE_MEMORY_H 1
| #define HAVE_STRINGS_H 1
| #define HAVE_INTTYPES_H 1
| #define HAVE_STDINT_H 1
| #define HAVE_UNISTD_H 1
| #define HAVE_DLFCN_H 1
| #define LT_OBJDIR ".libs/"
|
|
| int
| main (void)
| {
|
|   ;
|   return 0;
| }
|
configure:12651: result: no
configure:12654: error: *** Unable to build an empty module.

[rmeichsner]

Hi all,

after upgradeding the Kernel to 4.15.3-1.el7.elrepo.x86_64 the compilation succeeded without any errors:

dkms status
spl, 0.7.6, 4.15.3-1.el7.elrepo.x86_64, x86_64: installed
zfs, 0.7.6, 4.15.3-1.el7.elrepo.x86_64, x86_64: installed

[ptrj]

Sorry, i have the same issue.

CentOS Linux release 7.4.1708 (Core)
Kernel ML 4.15.10-1.el7.centos.x86_64

SPL build logs

Update: and same problem on kernel-lt 4.14.27-1.el7.centos.x86_64

[niusmallnan]

Same issue.

Kernel: 4.15.9

checking spl config... all
checking kernel source directory... /lib/modules/4.15.9-rancher/build
checking kernel build directory... /lib/modules/4.15.9-rancher/build
checking kernel source version... 4.15.9-rancher
checking kernel file name for module symbols... Module.symvers
checking whether debugging is enabled... no
checking whether basic kmem accounting is enabled... no
checking whether detailed kmem tracking is enabled... no
checking whether modules can be built... no
configure: error: *** Unable to build an empty module.

[behlendorf]

The build failure appears to have been introduced by a regression in the kernel packaging which breaks all out-of-tree-module builds. The objtool binary is no longer being included and it is required for external module builds when the kernel is compiled with CONFIG_STACK_VALIDATION. Here's the upstream issue:

https://bugzilla.redhat.com/show_bug.cgi?id=1550152

The fix is on the way for Fedora kernels:

https://src.fedoraproject.org/rpms/kernel/c/0ff2afdbe0501525ee2d5b53fdc20a320b29bc8c?branch=master