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Bug #4112
closedOpenBSC fails to compile on openSUSE Tumbleweed (gcc 9.1 with LTO enabled)
Start date:
07/17/2019
Due date:
% Done:
0%
Resolution:
Spec Reference:
Description
openSUSE just enabled LTO by default for its packages in Tumbleweed/Factory.
https://lists.opensuse.org/opensuse-factory/2019-07/msg00240.html
https://gcc.gnu.org/wiki/LinkTimeOptimization
This means the distro provided CFLAGS now changed from
without LTO
CFLAGS='-O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -g'
to
with LTO enabled
CFLAGS="-O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -flto=4 -g -Werror=implicit -Werror=maybe-uninitialized -Werror=memset-transposed-args -Werror=null-dereference -Werror=sizeof-array-argument -Werror=sizeof-pointer-memaccess"
compiling openbsc master then triggers the following warnings/errors:
[ 23s] gsm_04_08.c:1464:2: error: 'mi_type' may be used uninitialized in this function [-Werror=maybe-uninitialized] [ 23s] ../../include/openbsc/acc_ramp.h:90:32: error: potential null pointer dereference [-Werror=null-dereference] [ 23s] acc_ramp.c:279:22: error: potential null pointer dereference [-Werror=null-dereference] [ 23s] acc_ramp.c:280:30: error: potential null pointer dereference [-Werror=null-dereference] [ 23s] acc_ramp.c:281:35: error: potential null pointer dereference [-Werror=null-dereference] [ 23s] acc_ramp.c:277:16: error: potential null pointer dereference [-Werror=null-dereference] [ 23s] ../../include/openbsc/acc_ramp.h:90:32: error: potential null pointer dereference [-Werror=null-dereference] [ 23s] acc_ramp.c:279:22: error: potential null pointer dereference [-Werror=null-dereference] [ 23s] acc_ramp.c:280:30: error: potential null pointer dereference [-Werror=null-dereference] [ 23s] acc_ramp.c:281:35: error: potential null pointer dereference [-Werror=null-dereference] [ 23s] acc_ramp.c:277:16: error: potential null pointer dereference [-Werror=null-dereference] [ 23s] lto-wrapper: fatal error: make returned 2 exit status [ 23s] /usr/lib64/gcc/x86_64-suse-linux/9/../../../../x86_64-suse-linux/bin/ld: error: lto-wrapper failed [ 23s] collect2: error: ld returned 1 exit status [ 23s] error: Bad exit status from /var/tmp/rpm-tmp.6yGOJj (%build)
I have attatched the full buildlog.
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