I'm attaching a patch that solves the issue; verification steps below.
It disables -fexceptions when building multipath-udeb.
(I had in mind something more elegant, like only adding -fno-exceptions
from debian/rules into DEB_CFLAGS_MAINT_APPEND as done w/ -static-
libgcc, but that way it doesn't override the post-added -fexceptions in
Makefile.inc).. and found no other variable that would override it w/
less changes. So it's adding a patch to Makefile.inc and it does the
job.)
Some comments with more details/explanation of the issue were not
mirrored yet; should be on their way.
Build verification:
------------------
Checking the build log, the 2 tur.o objects are built correctly:
1) multipath-udeb: with -static-libgcc and without -fexceptions
2) multipath deb: without -static-libgcc and with -fexceptions (default)
$ dpkg-buildpackage 2>&1 | tee ../dpkg-buildpackage.log
$ grep -- '-o tur.o' ../dpkg-buildpackage.log
cc -g -O3 -fPIE -fstack-protector-strong -Wformat
-Werror=format-security -static-libgcc -D_FORTIFY_SOURCE=2 -O2 -g -pipe -Wall
-Wp,-D_FORTIFY_SOURCE=2 -fstack-protector --param=ssp-buffer-size=4 -Wunused
-Wstrict-prototypes -fPIC -DLIB_STRING=\"lib\" -I.. -c -o tur.o tur.c
cc -g -O3 -fPIE -fstack-protector-strong -Wformat
-Werror=format-security -D_FORTIFY_SOURCE=2 -O2 -g -pipe -Wall
-Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
--param=ssp-buffer-size=4 -Wunused -Wstrict-prototypes -fPIC
-DLIB_STRING=\"lib\" -I.. -c -o tur.o tur.c
Checking the build output, the ELF objects (don't) dyn-link to libgcc_s as
appropriate:
1) multipath-udeb: ELF objects don't dyn-link with libgcc_s
2) multipath deb: ELF objects dyn-link with libgcc_s
$ find debian/tmp-multipath-udeb/ | while read file; do file $file |
grep -q ELF && objdump -x $file | grep -q 'NEEDED.*libgcc_s' && echo $file
needs libgcc_s; done
$
$ find debian/tmp/ | while read file; do file $file | grep -q ELF &&
objdump -x $file | grep -q 'NEEDED.*libgcc_s' && echo $file needs libgcc_s; done
debian/tmp/lib/libmultipath.so.0 needs libgcc_s
debian/tmp/lib/multipath/libchecktur.so needs libgcc_s
debian/tmp/sbin/multipathd needs libgcc_s
$
Installer verification:
-----------------------
Configure multipath.conf for using tur with QEMU/KVM SCSI disks:
~ # cat <<EOF >/etc/multipath.conf <<EOF
defaults {
user_friendly_names yes
path_checker tur
}
blacklist_exceptions {
property ID_SERIAL
}
EOF
Test (Not OK):
~ # multipath -v3
...
<...> | A dynamic linking error occurred: (libgcc_s.so.1: cannot open
shared object file: No such file or directory)
...
<...> | A dynamic linking error occurred: (libgcc_s.so.1: cannot open
shared object file: No such file or directory)
uuid hcil dev dev_t pri dm_st chk_st vend/prod/rev dev_st
0:0:1:0 sda 8:0 -1 undef faulty QEMU,QEMU HARDDISK running
0:0:2:0 sdb 8:16 -1 undef faulty QEMU,QEMU HARDDISK running
...
Install the new udeb:
~ # udpkg -i multipath-
udeb_0.5.0-7ubuntu3fexceptions1_ppc64el.udeb
Re-test (now OK):
~ # multipath -v3
...
===== paths list =====
uuid hcil dev dev_t pri dm_st chk_st
vend/prod/re
0QEMU_QEMU_HARDDISK_helloworld 0:0:1:0 sda 8:0 1 undef ready
QEMU,QEMU HA
0QEMU_QEMU_HARDDISK_helloworld 0:0:2:0 sdb 8:16 1 undef ready
QEMU,QEMU HA
...
create: mpatha (0QEMU_QEMU_HARDDISK_helloworld) undef QEMU,QEMU HARDDISK
size=128G features='0' hwhandler='0' wp=undef
|-+- policy='round-robin 0' prio=1 status=undef
| `- 0:0:1:0 sda 8:0 undef ready running
`-+- policy='round-robin 0' prio=1 status=undef
`- 0:0:2:0 sdb 8:16 undef ready running
...
** Patch added: "Disable -fexceptions when building multipath-udeb"
https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/1489379/+attachment/4457034/+files/multipath-tools_disable-fexceptions-udeb.debdiff
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1489379
Title:
LTE: ISST:leeklp4 no mpath choices for install ubuntu 15.10
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/1489379/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
