https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86522
Bug ID: 86522
Summary: gcc-7.3.0 on x86-only fails to compile mariadb/mysql:
error: unsupported size for integer register
Product: gcc
Version: 7.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: valko at linux dot karinthy.hu
Target Milestone: ---
After switching to gcc-7.3.0, my Gentoo build system is no longer able to
compile mariadb and mysql packages on x86 platform.
Using the previous compiler version (6.4.0) in the same environment works.
Different versions of mariadb (10.0.35, 10.1.31, 10.2.15) or mysql (5.6.39) all
produce the same error message (the source file/function/line number is
different, but the error message is the same).
Using no optimization flag (removing -O2) works, using different levels of
optimization (-O1 or -O3) fails.
The problem only manifests itself on x86, a very similar amd64 build
environment works perfectly.
I reproduced the failure with a vanilla 7.3.0 to exclude the effects of
Gentoo-specific gcc patches.
