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Bug #4113
closedosmo-bsc fails to compile on openSUSE Tumbleweed (gcc 9.1 with LTO enabled)
Start date:
07/17/2019
Due date:
% Done:
0%
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 osmo-bsc master then triggers the following warnings/errors:
[ 22s] bsc_init.c:242:16: error: potential null pointer dereference [-Werror=null-dereference] [ 22s] system_information.c:490:9: error: 'f0' may be used uninitialized in this function [-Werror=maybe-uninitialized] [ 22s] lto-wrapper: fatal error: make returned 2 exit status [ 22s] /usr/lib64/gcc/x86_64-suse-linux/9/../../../../x86_64-suse-linux/bin/ld: error: lto-wrapper failed [ 22s] collect2: error: ld returned 1 exit status [ 22s] error: Bad exit status from /var/tmp/rpm-tmp.gBd6u2 (%build)
I have attatched the full buildlog.
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